- Aug 02, 2021
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Christophe JAILLET authored
The wrappers in include/linux/pci-dma-compat.h should go away. The patch has been generated with the coccinelle script below. It has been hand modified to use 'dma_set_mask_and_coherent()' instead of 'pci_set_dma_mask()/pci_set_consistent_dma_mask()' when applicable. It has been compile tested. @@ @@ - PCI_DMA_BIDIRECTIONAL + DMA_BIDIRECTIONAL @@ @@ - PCI_DMA_TODEVICE + DMA_TO_DEVICE @@ @@ - PCI_DMA_FROMDEVICE + DMA_FROM_DEVICE @@ @@ - PCI_DMA_NONE + DMA_NONE @@ expression e1, e2, e3; @@ - pci_alloc_consistent(e1, e2, e3) + dma_alloc_coherent(&e1->dev, e2, e3, GFP_) @@ expression e1, e2, e3; @@ - pci_zalloc_consistent(e1, e2, e3) + dma_alloc_coherent(&e1->dev, e2, e3, GFP_) @@ expression e1, e2, e3, e4; @@ - pci_free_consistent(e1, e2, e3, e4) + dma_free_coherent(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_map_single(e1, e2, e3, e4) + dma_map_single(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_unmap_single(e1, e2, e3, e4) + dma_unmap_single(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4, e5; @@ - pci_map_page(e1, e2, e3, e4, e5) + dma_map_page(&e1->dev, e2, e3, e4, e5) @@ expression e1, e2, e3, e4; @@ - pci_unmap_page(e1, e2, e3, e4) + dma_unmap_page(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_map_sg(e1, e2, e3, e4) + dma_map_sg(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_unmap_sg(e1, e2, e3, e4) + dma_unmap_sg(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_single_for_cpu(e1, e2, e3, e4) + dma_sync_single_for_cpu(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_single_for_device(e1, e2, e3, e4) + dma_sync_single_for_device(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_sg_for_cpu(e1, e2, e3, e4) + dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_sg_for_device(e1, e2, e3, e4) + dma_sync_sg_for_device(&e1->dev, e2, e3, e4) @@ expression e1, e2; @@ - pci_dma_mapping_error(e1, e2) + dma_mapping_error(&e1->dev, e2) @@ expression e1, e2; @@ - pci_set_dma_mask(e1, e2) + dma_set_mask(&e1->dev, e2) @@ expression e1, e2; @@ - pci_set_consistent_dma_mask(e1, e2) + dma_set_coherent_mask(&e1->dev, e2) Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Vladimir Oltean authored
It is desirable to reduce the surface of DSA_TAG_PROTO_NONE as much as we can, because we now have options for switches without hardware support for DSA tagging, and the occurrence in the mt7530 driver is in fact quite gratuitout and easy to remove. Since ds->ops->get_tag_protocol() is only called for CPU ports, the checks for a CPU port in mtk_get_tag_protocol() are redundant and can be removed. Signed-off-by:
Vladimir Oltean <vladimir.oltean@nxp.com> Acked-by:
DENG Qingfang <dqfext@gmail.com> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Sunil Goutham says: ==================== cn10k: DWRR MTU and weights configuration On OcteonTx2 DWRR quantum is directly configured into each of the transmit scheduler queues. And PF/VF drivers were free to config any value upto 2^24. On CN10K, HW is modified, the quantum configuration at scheduler queues is in terms of weight. And SW needs to setup a base DWRR MTU at NIX_AF_DWRR_RPM_MTU / NIX_AF_DWRR_SDP_MTU. HW will do 'DWRR MTU * weight' to get the quantum. This patch series addresses this HW change on CN10K silicons, both admin function and PF/VF drivers are modified. Also added support to program DWRR MTU via devlink params. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Sunil Goutham authored
Program SQ, MDQ, TL4 to TL2 transmit scheduler queues' DWRR weight based on DWRR MTU programmed at NIX_AF_DWRR_RPM_MTU. The DWRR MTU from admin function is retrieved via mbox. On OcteaonTx2 silicon, admin function driver responds with DWRR MTU as '1'. This helps to avoid silicon specific transmit scheduler DWRR quantum/weight configuration logic. Signed-off-by:
Sunil Goutham <sgoutham@marvell.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Sunil Goutham authored
On OcteonTx2 DWRR quantum is directly configured into each of the transmit scheduler queues. And PF/VF drivers were free to config any value upto 2^24. On CN10K, HW is modified, the quantum configuration at scheduler queues is in terms of weight. And SW needs to setup a base DWRR MTU at NIX_AF_DWRR_RPM_MTU / NIX_AF_DWRR_SDP_MTU. HW will do 'DWRR MTU * weight' to get the quantum. For LBK traffic, value programmed into NIX_AF_DWRR_RPM_MTU register is considered as DWRR MTU. This patch programs a default DWRR MTU of 8192 into HW and also provides a way to change this via devlink params. Signed-off-by:
Sunil Goutham <sgoutham@marvell.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Dust Li authored
This patch removed the 'raw gso min size - 1' test which always fails now: ./in_netns.sh ./psock_snd -v -c -g -l "${mss}" raw gso min size - 1 (expected to fail) tx: 1524 rx: 1472 OK After commit 7c6d2ecb ("net: be more gentle about silly gso requests coming from user"), we relaxed the min gso_size check in virtio_net_hdr_to_skb(). So when a packet which is smaller then the gso_size, GSO for this packet will not be set, the packet will be send/recv successfully. Signed-off-by:
Dust Li <dust.li@linux.alibaba.com> Reviewed-by:
Xuan Zhuo <xuanzhuo@linux.alibaba.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yufeng Mo authored
Some time ago, I reported a calltrace issue "did not find a suitable aggregator", please see[1]. After a period of analysis and reproduction, I find that this problem is caused by concurrency. Before the problem occurs, the bond structure is like follows: bond0 - slaver0(eth0) - agg0.lag_ports -> port0 - port1 \ port0 \ slaver1(eth1) - agg1.lag_ports -> NULL \ port1 If we run 'ifenslave bond0 -d eth1', the process is like below: excuting __bond_release_one() | bond_upper_dev_unlink()[step1] | | | | | bond_3ad_lacpdu_recv() | | ->bond_3ad_rx_indication() | | spin_lock_bh() | | ->ad_rx_machine() | | ->__record_pdu()[step2] | | spin_unlock_bh() | | | | bond_3ad_state_machine_handler() | spin_lock_bh() | ->ad_port_selection_logic() | ->try to find free aggregator[step3] | ->try to find suitable aggregator[step4] | ->did not find a suitable aggregator[step5] | spin_unlock_bh() | | | | bond_3ad_unbind_slave() | spin_lock_bh() spin_unlock_bh() step1: already removed slaver1(eth1) from list, but port1 remains step2: receive a lacpdu and update port0 step3: port0 will be removed from agg0.lag_ports. The struct is "agg0.lag_ports -> port1" now, and agg0 is not free. At the same time, slaver1/agg1 has been removed from the list by step1. So we can't find a free aggregator now. step4: can't find suitable aggregator because of step2 step5: cause a calltrace since port->aggregator is NULL To solve this concurrency problem, put bond_upper_dev_unlink() after bond_3ad_unbind_slave(). In this way, we can invalid the port first and skip this port in bond_3ad_state_machine_handler(). This eliminates the situation that the slaver has been removed from the list but the port is still valid. [1]https://lore.kernel.org/netdev/10374.1611947473@famine/ Signed-off-by:
Yufeng Mo <moyufeng@huawei.com> Acked-by:
Jay Vosburgh <jay.vosburgh@canonical.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Cong Wang authored
TC action ->init() API has 10 parameters, it becomes harder to read. Some of them are just boolean and can be replaced by flags. Similarly for the internal API tcf_action_init() and tcf_exts_validate(). This patch converts them to flags and fold them into the upper 16 bits of "flags", whose lower 16 bits are still reserved for user-space. More specifically, the following kernel flags are introduced: TCA_ACT_FLAGS_POLICE replace 'name' in a few contexts, to distinguish whether it is compatible with policer. TCA_ACT_FLAGS_BIND replaces 'bind', to indicate whether this action is bound to a filter. TCA_ACT_FLAGS_REPLACE replaces 'ovr' in most contexts, means we are replacing an existing action. TCA_ACT_FLAGS_NO_RTNL replaces 'rtnl_held' but has the opposite meaning, because we still hold RTNL in most cases. The only user-space flag TCA_ACT_FLAGS_NO_PERCPU_STATS is untouched and still stored as before. I have tested this patch with tdc and I do not see any failure related to this patch. Tested-by:
Vlad Buslov <vladbu@nvidia.com> Acked-by:
Jamal Hadi <Salim<jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by:
Cong Wang <cong.wang@bytedance.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Martin Kaiser authored
In three places, the driver calls of_get_property and reads the property length although the length is not used. Update the calls to not request the length. Signed-off-by:
Martin Kaiser <martin@kaiser.cx> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- Aug 01, 2021
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https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski authored
Andrii Nakryiko says: ==================== bpf-next 2021-07-30 We've added 64 non-merge commits during the last 15 day(s) which contain a total of 83 files changed, 5027 insertions(+), 1808 deletions(-). The main changes are: 1) BTF-guided binary data dumping libbpf API, from Alan. 2) Internal factoring out of libbpf CO-RE relocation logic, from Alexei. 3) Ambient BPF run context and cgroup storage cleanup, from Andrii. 4) Few small API additions for libbpf 1.0 effort, from Evgeniy and Hengqi. 5) bpf_program__attach_kprobe_opts() fixes in libbpf, from Jiri. 6) bpf_{get,set}sockopt() support in BPF iterators, from Martin. 7) BPF map pinning improvements in libbpf, from Martynas. 8) Improved module BTF support in libbpf and bpftool, from Quentin. 9) Bpftool cleanups and documentation improvements, from Quentin. 10) Libbpf improvements for supporting CO-RE on old kernels, from Shuyi. 11) Increased maximum cgroup storage size, from Stanislav. 12) Small fixes and improvements to BPF tests and samples, from various folks. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (64 commits) tools: bpftool: Complete metrics list in "bpftool prog profile" doc tools: bpftool: Document and add bash completion for -L, -B options selftests/bpf: Update bpftool's consistency script for checking options tools: bpftool: Update and synchronise option list in doc and help msg tools: bpftool: Complete and synchronise attach or map types selftests/bpf: Check consistency between bpftool source, doc, completion tools: bpftool: Slightly ease bash completion updates unix_bpf: Fix a potential deadlock in unix_dgram_bpf_recvmsg() libbpf: Add btf__load_vmlinux_btf/btf__load_module_btf tools: bpftool: Support dumping split BTF by id libbpf: Add split BTF support for btf__load_from_kernel_by_id() tools: Replace btf__get_from_id() with btf__load_from_kernel_by_id() tools: Free BTF objects at various locations libbpf: Rename btf__get_from_id() as btf__load_from_kernel_by_id() libbpf: Rename btf__load() as btf__load_into_kernel() libbpf: Return non-null error on failures in libbpf_find_prog_btf_id() bpf: Emit better log message if bpf_iter ctx arg btf_id == 0 tools/resolve_btfids: Emit warnings and patch zero id for missing symbols bpf: Increase supported cgroup storage value size libbpf: Fix race when pinning maps in parallel ... ==================== Link: https://lore.kernel.org/r/20210730225606.1897330-1-andrii@kernel.org Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski authored
Conflicting commits, all resolutions pretty trivial: drivers/bus/mhi/pci_generic.c 5c2c8531 ("bus: mhi: pci-generic: configurable network interface MRU") 56f6f4c4 ("bus: mhi: pci_generic: Apply no-op for wake using sideband wake boolean") drivers/nfc/s3fwrn5/firmware.c a0302ff5 ("nfc: s3fwrn5: remove unnecessary label") 46573e3a ("nfc: s3fwrn5: fix undefined parameter values in dev_err()") 801e541c ("nfc: s3fwrn5: fix undefined parameter values in dev_err()") MAINTAINERS 7d901a1e ("net: phy: add Maxlinear GPY115/21x/24x driver") 8a7b46fa ("MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver") Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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- Jul 31, 2021
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from Jakub Kicinski: "Networking fixes for 5.14-rc4, including fixes from bpf, can, WiFi (mac80211) and netfilter trees. Current release - regressions: - mac80211: fix starting aggregation sessions on mesh interfaces Current release - new code bugs: - sctp: send pmtu probe only if packet loss in Search Complete state - bnxt_en: add missing periodic PHC overflow check - devlink: fix phys_port_name of virtual port and merge error - hns3: change the method of obtaining default ptp cycle - can: mcba_usb_start(): add missing urb->transfer_dma initialization Previous releases - regressions: - set true network header for ECN decapsulation - mlx5e: RX, avoid possible data corruption w/ relaxed ordering and LRO - phy: re-add check for PHY_BRCM_DIS_TXCRXC_NOENRGY on the BCM54811 PHY - sctp: fix return value check in __sctp_rcv_asconf_lookup Previous releases - always broken: - bpf: - more spectre corner case fixes, introduce a BPF nospec instruction for mitigating Spectre v4 - fix OOB read when printing XDP link fdinfo - sockmap: fix cleanup related races - mac80211: fix enabling 4-address mode on a sta vif after assoc - can: - raw: raw_setsockopt(): fix raw_rcv panic for sock UAF - j1939: j1939_session_deactivate(): clarify lifetime of session object, avoid UAF - fix number of identical memory leaks in USB drivers - tipc: - do not blindly write skb_shinfo frags when doing decryption - fix sleeping in tipc accept routine" * tag 'net-5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (91 commits) gve: Update MAINTAINERS list can: esd_usb2: fix memory leak can: ems_usb: fix memory leak can: usb_8dev: fix memory leak can: mcba_usb_start(): add missing urb->transfer_dma initialization can: hi311x: fix a signedness bug in hi3110_cmd() MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver bpf: Fix leakage due to insufficient speculative store bypass mitigation bpf: Introduce BPF nospec instruction for mitigating Spectre v4 sis900: Fix missing pci_disable_device() in probe and remove net: let flow have same hash in two directions nfc: nfcsim: fix use after free during module unload tulip: windbond-840: Fix missing pci_disable_device() in probe and remove sctp: fix return value check in __sctp_rcv_asconf_lookup nfc: s3fwrn5: fix undefined parameter values in dev_err() net/mlx5: Fix mlx5_vport_tbl_attr chain from u16 to u32 net/mlx5e: Fix nullptr in mlx5e_hairpin_get_mdev() net/mlx5: Unload device upon firmware fatal error net/mlx5e: Fix page allocation failure for ptp-RQ over SF net/mlx5e: Fix page allocation failure for trap-RQ over SF ...
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull ACPI fixes from Rafael Wysocki: "These revert a recent IRQ resources handling modification that turned out to be problematic, fix suspend-to-idle handling on AMD platforms to take upcoming systems into account properly and fix the retrieval of the DPTF attributes of the PCH FIVR. Specifics: - Revert recent change of the ACPI IRQ resources handling that attempted to improve the ACPI IRQ override selection logic, but introduced serious regressions on some systems (Hui Wang). - Fix up quirks for AMD platforms in the suspend-to-idle support code so as to take upcoming systems using uPEP HID AMDI007 into account as appropriate (Mario Limonciello). - Fix the code retrieving DPTF attributes of the PCH FIVR so that it agrees on the return data type with the ACPI control method evaluated for this purpose (Srinivas Pandruvada)" * tag 'acpi-5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: DPTF: Fix reading of attributes Revert "ACPI: resources: Add checks for ACPI IRQ override" ACPI: PM: Add support for upcoming AMD uPEP HID AMDI007
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Linus Torvalds authored
Since commit 1b6b26ae ("pipe: fix and clarify pipe write wakeup logic") we have sanitized the pipe write logic, and would only try to wake up readers if they needed it. In particular, if the pipe already had data in it before the write, there was no point in trying to wake up a reader, since any existing readers must have been aware of the pre-existing data already. Doing extraneous wakeups will only cause potential thundering herd problems. However, it turns out that some Android libraries have misused the EPOLL interface, and expected "edge triggered" be to "any new write will trigger it". Even if there was no edge in sight. Quoting Sandeep Patil: "The commit 1b6b26ae ('pipe: fix and clarify pipe write wakeup logic') changed pipe write logic to wakeup readers only if the pipe was empty at the time of write. However, there are libraries that relied upon the older behavior for notification scheme similar to what's described in [1] One such library 'realm-core'[2] is used by numerous Android applications. The library uses a similar notification mechanism as GNU Make but it never drains the pipe until it is full. When Android moved to v5.10 kernel, all applications using this library stopped working. The library has since been fixed[3] but it will be a while before all applications incorporate the updated library" Our regression rule for the kernel is that if applications break from new behavior, it's a regression, even if it was because the application did something patently wrong. Also note the original report [4] by Michal Kerrisk about a test for this epoll behavior - but at that point we didn't know of any actual broken use case. So add the extraneous wakeup, to approximate the old behavior. [ I say "approximate", because the exact old behavior was to do a wakeup not for each write(), but for each pipe buffer chunk that was filled in. The behavior introduced by this change is not that - this is just "every write will cause a wakeup, whether necessary or not", which seems to be sufficient for the broken library use. ] It's worth noting that this adds the extraneous wakeup only for the write side, while the read side still considers the "edge" to be purely about reading enough from the pipe to allow further writes. See commit f467a6a6 ("pipe: fix and clarify pipe read wakeup logic") for the pipe read case, which remains that "only wake up if the pipe was full, and we read something from it". Link: https://lore.kernel.org/lkml/CAHk-=wjeG0q1vgzu4iJhW5juPkTsjTYmiqiMUYAebWW+0bam6w@mail.gmail.com/ [1] Link: https://github.com/realm/realm-core [2] Link: https://github.com/realm/realm-core/issues/4666 [3] Link: https://lore.kernel.org/lkml/CAKgNAkjMBGeAwF=2MKK758BhxvW58wYTgYKB2V-gY1PwXxrH+Q@mail.gmail.com/ [4] Link: https://lore.kernel.org/lkml/20210729222635.2937453-1-sspatil@android.com/ Reported-by:
Sandeep Patil <sspatil@android.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Andrii Nakryiko authored
Quentin Monnet says: ==================== To work with the different program types, map types, attach types etc. supported by eBPF, bpftool needs occasional updates to learn about the new features supported by the kernel. When such types translate into new keyword for the command line, updates are expected in several locations: typically, the help message displayed from bpftool itself, the manual page, and the bash completion file should be updated. The options used by the different commands for bpftool should also remain synchronised at those locations. Several omissions have occurred in the past, and a number of types are still missing today. This set is an attempt to improve the situation. It brings up-to-date the lists of types or options in bpftool, and also adds a Python script to the BPF selftests to automatically check that most of these lists remain synchronised. v2: - Reformat some lines in the bash completion file. - Do not reformat attach types, to preserve git-blame history. - Do not call Python script from tools/testing/selftests/bpf/Makefile. ==================== Signed-off-by:
Andrii Nakryiko <andrii@kernel.org>
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Quentin Monnet authored
Profiling programs with bpftool was extended some time ago to support two new metrics, namely itlb_misses and dtlb_misses (misses for the instruction/data translation lookaside buffer). Update the manual page and bash completion accordingly. Fixes: 450d060e ("bpftool: Add {i,d}tlb_misses support for bpftool profile") Signed-off-by:
Quentin Monnet <quentin@isovalent.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210730215435.7095-8-quentin@isovalent.com
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Quentin Monnet authored
The -L|--use-loader option for using loader programs when loading, or when generating a skeleton, did not have any documentation or bash completion. Same thing goes for -B|--base-btf, used to pass a path to a base BTF object for split BTF such as BTF for kernel modules. This patch documents and adds bash completion for those options. Fixes: 75fa1777 ("tools/bpftool: Add bpftool support for split BTF") Fixes: d510296d ("bpftool: Use syscall/loader program in "prog load" and "gen skeleton" command.") Signed-off-by:
Quentin Monnet <quentin@isovalent.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210730215435.7095-7-quentin@isovalent.com
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Quentin Monnet authored
Update the script responsible for checking that the different types used at various places in bpftool are synchronised, and extend it to check the consistency of options between the help messages in the source code and the manual pages. Signed-off-by:
Quentin Monnet <quentin@isovalent.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210730215435.7095-6-quentin@isovalent.com
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Quentin Monnet authored
All bpftool commands support the options for JSON output and debug from libbpf. In addition, some commands support additional options corresponding to specific use cases. The list of options described in the man pages for the different commands are not always accurate. The messages for interactive help are mostly limited to HELP_SPEC_OPTIONS, and are even less representative of the actual set of options supported for the commands. Let's update the lists: - HELP_SPEC_OPTIONS is modified to contain the "default" options (JSON and debug), and to be extensible (no ending curly bracket). - All commands use HELP_SPEC_OPTIONS in their help message, and then complete the list with their specific options. - The lists of options in the man pages are updated. - The formatting of the list for bpftool.rst is adjusted to match formatting for the other man pages. This is for consistency, and also because it will be helpful in a future patch to automatically check that the files are synchronised. Signed-off-by:
Quentin Monnet <quentin@isovalent.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210730215435.7095-5-quentin@isovalent.com
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Quentin Monnet authored
Update bpftool's list of attach type names to tell it about the latest attach types, or the "ringbuf" map. Also update the documentation, help messages, and bash completion when relevant. These missing items were reported by the newly added Python script used to help maintain consistency in bpftool. Signed-off-by:
Quentin Monnet <quentin@isovalent.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210730215435.7095-4-quentin@isovalent.com
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Quentin Monnet authored
Whenever the eBPF subsystem gains new elements, such as new program or map types, it is necessary to update bpftool if we want it able to handle the new items. In addition to the main arrays containing the names of these elements in the source code, there are also multiple locations to update: - The help message in the do_help() functions in bpftool's source code. - The RST documentation files. - The bash completion file. This has led to omissions multiple times in the past. This patch attempts to address this issue by adding consistency checks for all these different locations. It also verifies that the bpf_prog_type, bpf_map_type and bpf_attach_type enums from the UAPI BPF header have all their members present in bpftool. The script requires no argument to run, it reads and parses the different files to check, and prints the mismatches, if any. It currently reports a number of missing elements, which will be fixed in a later patch: $ ./test_bpftool_synctypes.py Comparing [...]/linux/tools/bpf/bpftool/map.c (map_type_name) and [...]/linux/tools/bpf/bpftool/bash-completion/bpftool (BPFTOOL_MAP_CREATE_TYPES): {'ringbuf'} Comparing BPF header (enum bpf_attach_type) and [...]/linux/tools/bpf/bpftool/common.c (attach_type_name): {'BPF_TRACE_ITER', 'BPF_XDP_DEVMAP', 'BPF_XDP', 'BPF_SK_REUSEPORT_SELECT', 'BPF_XDP_CPUMAP', 'BPF_SK_REUSEPORT_SELECT_OR_MIGRATE'} Comparing [...]/linux/tools/bpf/bpftool/prog.c (attach_type_strings) and [...]/linux/tools/bpf/bpftool/prog.c (do_help() ATTACH_TYPE): {'skb_verdict'} Comparing [...]/linux/tools/bpf/bpftool/prog.c (attach_type_strings) and [...]/linux/tools/bpf/bpftool/Documentation/bpftool-prog.rst (ATTACH_TYPE): {'skb_verdict'} Comparing [...]/linux/tools/bpf/bpftool/prog.c (attach_type_strings) and [...]/linux/tools/bpf/bpftool/bash-completion/bpftool (BPFTOOL_PROG_ATTACH_TYPES): {'skb_verdict'} Note that the script does NOT check for consistency between the list of program types that bpftool claims it accepts and the actual list of keywords that can be used. This is because bpftool does not "see" them, they are ELF section names parsed by libbpf. It is not hard to parse the section_defs[] array in libbpf, but some section names are associated with program types that bpftool cannot load at the moment. For example, some programs require a BTF target and an attach target that bpftool cannot handle. The script may be extended to parse the array and check only relevant values in the future. The script is not added to the selftests' Makefile, because doing so would require all patches with BPF UAPI change to also update bpftool. Instead it is to be added to the CI. Signed-off-by:
Quentin Monnet <quentin@isovalent.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210730215435.7095-3-quentin@isovalent.com
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Quentin Monnet authored
Bash completion for bpftool gets two minor improvements in this patch. Move the detection of attach types for "bpftool cgroup attach" outside of the "case/esac" bloc, where we cannot reuse our variable holding the list of supported attach types as a pattern list. After the change, we have only one list of cgroup attach types to update when new types are added, instead of the former two lists. Also rename the variables holding lists of names for program types, map types, and attach types, to make them more unique. This can make it slightly easier to point people to the relevant variables to update, but the main objective here is to help run a script to check that bash completion is up-to-date with bpftool's source code. Signed-off-by:
Quentin Monnet <quentin@isovalent.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210730215435.7095-2-quentin@isovalent.com
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Jakub Kicinski authored
Leon Romanovsky says: ==================== Clean devlink net namespace operations This short series continues my work on devlink core code to make devlink reload less prone to errors and harden it from API abuse. Despite first patch being a clear fix, I would ask you to apply it to net-next anyway, because the fixed patch is anyway old and it will help us to eliminate merge conflicts that will arise for following patches or even for the second one. ==================== Link: https://lore.kernel.org/r/cover.1627578998.git.leonro@nvidia.com Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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Leon Romanovsky authored
There is no need in extra call indirection and check from impossible flow where someone tries to set namespace without prior call to devlink_alloc(). Instead of this extra logic and additional EXPORT_SYMBOL, use specialized devlink allocation function that receives net namespace as an argument. Such specialized API allows clear view when devlink initialized in wrong net namespace and/or kernel users don't try to change devlink namespace under the hood. Reviewed-by:
Jiri Pirko <jiri@nvidia.com> Signed-off-by:
Leon Romanovsky <leonro@nvidia.com> Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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Leon Romanovsky authored
The change of namespaces during devlink reload calls to driver unload before it accesses devlink parameters. The commands below causes to use-after-free bug when trying to get flow steering mode. * ip netns add n1 * devlink dev reload pci/0000:00:09.0 netns n1 ================================================================== BUG: KASAN: use-after-free in mlx5_devlink_fs_mode_get+0x96/0xa0 [mlx5_core] Read of size 4 at addr ffff888009d04308 by task devlink/275 CPU: 6 PID: 275 Comm: devlink Not tainted 5.12.0-rc2+ #2853 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack+0x93/0xc2 print_address_description.constprop.0+0x18/0x140 ? mlx5_devlink_fs_mode_get+0x96/0xa0 [mlx5_core] ? mlx5_devlink_fs_mode_get+0x96/0xa0 [mlx5_core] kasan_report.cold+0x7c/0xd8 ? mlx5_devlink_fs_mode_get+0x96/0xa0 [mlx5_core] mlx5_devlink_fs_mode_get+0x96/0xa0 [mlx5_core] devlink_nl_param_fill+0x1c8/0xe80 ? __free_pages_ok+0x37a/0x8a0 ? devlink_flash_update_timeout_notify+0xd0/0xd0 ? lock_acquire+0x1a9/0x6d0 ? fs_reclaim_acquire+0xb7/0x160 ? lock_is_held_type+0x98/0x110 ? 0xffffffff81000000 ? lock_release+0x1f9/0x6c0 ? fs_reclaim_release+0xa1/0xf0 ? lock_downgrade+0x6d0/0x6d0 ? lock_is_held_type+0x98/0x110 ? lock_is_held_type+0x98/0x110 ? memset+0x20/0x40 ? __build_skb_around+0x1f8/0x2b0 devlink_param_notify+0x6d/0x180 devlink_reload+0x1c3/0x520 ? devlink_remote_reload_actions_performed+0x30/0x30 ? mutex_trylock+0x24b/0x2d0 ? devlink_nl_cmd_reload+0x62b/0x1070 devlink_nl_cmd_reload+0x66d/0x1070 ? devlink_reload+0x520/0x520 ? devlink_get_from_attrs+0x1bc/0x260 ? devlink_nl_pre_doit+0x64/0x4d0 genl_family_rcv_msg_doit+0x1e9/0x2f0 ? mutex_lock_io_nested+0x1130/0x1130 ? genl_family_rcv_msg_attrs_parse.constprop.0+0x240/0x240 ? security_capable+0x51/0x90 genl_rcv_msg+0x27f/0x4a0 ? genl_get_cmd+0x3c0/0x3c0 ? lock_acquire+0x1a9/0x6d0 ? devlink_reload+0x520/0x520 ? lock_release+0x6c0/0x6c0 netlink_rcv_skb+0x11d/0x340 ? genl_get_cmd+0x3c0/0x3c0 ? netlink_ack+0x9f0/0x9f0 ? lock_release+0x1f9/0x6c0 genl_rcv+0x24/0x40 netlink_unicast+0x433/0x700 ? netlink_attachskb+0x730/0x730 ? _copy_from_iter_full+0x178/0x650 ? __alloc_skb+0x113/0x2b0 netlink_sendmsg+0x6f1/0xbd0 ? netlink_unicast+0x700/0x700 ? lock_is_held_type+0x98/0x110 ? netlink_unicast+0x700/0x700 sock_sendmsg+0xb0/0xe0 __sys_sendto+0x193/0x240 ? __x64_sys_getpeername+0xb0/0xb0 ? do_sys_openat2+0x10b/0x370 ? __up_read+0x1a1/0x7b0 ? do_user_addr_fault+0x219/0xdc0 ? __x64_sys_openat+0x120/0x1d0 ? __x64_sys_open+0x1a0/0x1a0 __x64_sys_sendto+0xdd/0x1b0 ? syscall_enter_from_user_mode+0x1d/0x50 do_syscall_64+0x2d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fc69d0af14a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 76 c3 0f 1f 44 00 00 55 48 83 ec 30 44 89 4c RSP: 002b:00007ffc1d8292f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fc69d0af14a RDX: 0000000000000038 RSI: 0000555f57c56440 RDI: 0000000000000003 RBP: 0000555f57c56410 R08: 00007fc69d17b200 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 146: kasan_save_stack+0x1b/0x40 __kasan_kmalloc+0x99/0xc0 mlx5_init_fs+0xf0/0x1c50 [mlx5_core] mlx5_load+0xd2/0x180 [mlx5_core] mlx5_init_one+0x2f6/0x450 [mlx5_core] probe_one+0x47d/0x6e0 [mlx5_core] pci_device_probe+0x2a0/0x4a0 really_probe+0x20a/0xc90 driver_probe_device+0xd8/0x380 device_driver_attach+0x1df/0x250 __driver_attach+0xff/0x240 bus_for_each_dev+0x11e/0x1a0 bus_add_driver+0x309/0x570 driver_register+0x1ee/0x380 0xffffffffa06b8062 do_one_initcall+0xd5/0x410 do_init_module+0x1c8/0x760 load_module+0x6d8b/0x9650 __do_sys_finit_module+0x118/0x1b0 do_syscall_64+0x2d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 275: kasan_save_stack+0x1b/0x40 kasan_set_track+0x1c/0x30 kasan_set_free_info+0x20/0x30 __kasan_slab_free+0x102/0x140 slab_free_freelist_hook+0x74/0x1b0 kfree+0xd7/0x2a0 mlx5_unload+0x16/0xb0 [mlx5_core] mlx5_unload_one+0xae/0x120 [mlx5_core] mlx5_devlink_reload_down+0x1bc/0x380 [mlx5_core] devlink_reload+0x141/0x520 devlink_nl_cmd_reload+0x66d/0x1070 genl_family_rcv_msg_doit+0x1e9/0x2f0 genl_rcv_msg+0x27f/0x4a0 netlink_rcv_skb+0x11d/0x340 genl_rcv+0x24/0x40 netlink_unicast+0x433/0x700 netlink_sendmsg+0x6f1/0xbd0 sock_sendmsg+0xb0/0xe0 __sys_sendto+0x193/0x240 __x64_sys_sendto+0xdd/0x1b0 do_syscall_64+0x2d/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888009d04300 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 8 bytes inside of 128-byte region [ffff888009d04300, ffff888009d04380) The buggy address belongs to the page: page:0000000086a64ecc refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009d04000 pfn:0x9d04 head:0000000086a64ecc order:1 compound_mapcount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 ffffea0000203980 0000000200000002 ffff8880050428c0 raw: ffff888009d04000 000000008020001d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888009d04200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888009d04280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888009d04300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888009d04380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888009d04400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== The right solution to devlink reload is to notify about deletion of parameters, unload driver, change net namespaces, load driver and notify about addition of parameters. Fixes: 070c63f2 ("net: devlink: allow to change namespaces during reload") Reviewed-by:
Parav Pandit <parav@nvidia.com> Signed-off-by:
Leon Romanovsky <leonro@nvidia.com> Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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Cong Wang authored
As Eric noticed, __unix_dgram_recvmsg() may acquire u->iolock too, so we have to release it before calling this function. Fixes: 9825d866 ("af_unix: Implement unix_dgram_bpf_recvmsg()") Reported-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
Cong Wang <cong.wang@bytedance.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Acked-by:
Jakub Sitnicki <jakub@cloudflare.com> Acked-by:
John Fastabend <john.fastabend@gmail.com>
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Hengqi Chen authored
Add two new APIs: btf__load_vmlinux_btf and btf__load_module_btf. btf__load_vmlinux_btf is just an alias to the existing API named libbpf_find_kernel_btf, rename to be more precisely and consistent with existing BTF APIs. btf__load_module_btf can be used to load module BTF, add it for completeness. These two APIs are useful for implementing tracing tools and introspection tools. This is part of the effort towards libbpf 1.0 ([0]). [0] Closes: https://github.com/libbpf/libbpf/issues/280 Signed-off-by:
Hengqi Chen <hengqi.chen@gmail.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210730114012.494408-1-hengqi.chen@gmail.com
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Paolo Abeni authored
If skb_dst_set_noref() is invoked with a NULL dst, the 'slow_gro' field is cleared, too. That could lead to wrong behavior if the skb later enters the GRO stage. Fix the potential issue replacing preserving a non-zero value of the 'slow_gro' field. Additionally, fix a comment typo. Reported-by:
Sabrina Dubroca <sd@queasysnail.net> Reported-by:
Jakub Kicinski <kuba@kernel.org> Fixes: 8a886b14 ("sk_buff: track dst status in slow_gro") Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Link: https://lore.kernel.org/r/aa42529252dc8bb02bd42e8629427040d1058537.1627662501.git.pabeni@redhat.com Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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Rafael J. Wysocki authored
* acpi-resources: Revert "ACPI: resources: Add checks for ACPI IRQ override" * acpi-dptf: ACPI: DPTF: Fix reading of attributes
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fixes from Jens Axboe: - gendisk freeing fix (Christoph) - blk-iocost wake ordering fix (Tejun) - tag allocation error handling fix (John) - loop locking fix. While this isn't the prettiest fix in the world, nobody has any good alternatives for 5.14. Something to likely revisit for 5.15. (Tetsuo) * tag 'block-5.14-2021-07-30' of git://git.kernel.dk/linux-block: block: delay freeing the gendisk blk-iocost: fix operation ordering in iocg_wake_fn() blk-mq-sched: Fix blk_mq_sched_alloc_tags() error handling loop: reintroduce global lock for safe loop_validate_file() traversal
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull io_uring fixes from Jens Axboe: - A fix for block backed reissue (me) - Reissue context hardening (me) - Async link locking fix (Pavel) * tag 'io_uring-5.14-2021-07-30' of git://git.kernel.dk/linux-block: io_uring: fix poll requests leaking second poll entries io_uring: don't block level reissue off completion path io_uring: always reissue from task_work context io_uring: fix race in unified task_work running io_uring: fix io_prep_async_link locking
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull libata fixlets from Jens Axboe: - A fix for PIO highmem (Christoph) - Kill HAVE_IDE as it's now unused (Lukas) * tag 'libata-5.14-2021-07-30' of git://git.kernel.dk/linux-block: arch: Kconfig: clean up obsolete use of HAVE_IDE libata: fix ata_pio_sector for CONFIG_HIGHMEM
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git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linuxLinus Torvalds authored
Pull btrfs fixes from David Sterba: - fix -Warray-bounds warning, to help external patchset to make it default treewide - fix writeable device accounting (syzbot report) - fix fsync and log replay after a rename and inode eviction - fix potentially lost error code when submitting multiple bios for compressed range * tag 'for-5.14-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: btrfs: calculate number of eb pages properly in csum_tree_block btrfs: fix rw device counting in __btrfs_free_extra_devids btrfs: fix lost inode on log replay after mix of fsync, rename and inode eviction btrfs: mark compressed range uptodate only if all bio succeed
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git://git.kernel.org/pub/scm/linux/kernel/git/hid/hidLinus Torvalds authored
Pull HID fixes from Jiri Kosina: - resume timing fix for intel-ish driver (Ye Xiang) - fix for using incorrect MMIO register in amd_sfh driver (Dylan MacKenzie) - Cintiq 24HDT / 27QHDT regression fix and touch processing fix for Wacom driver (Jason Gerecke) - device removal bugfix for ft260 driver (Michael Zaidman) - other small assorted fixes * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: HID: ft260: fix device removal due to USB disconnect HID: wacom: Skip processing of touches with negative slot values HID: wacom: Re-enable touch by default for Cintiq 24HDT / 27QHDT HID: Kconfig: Fix spelling mistake "Uninterruptable" -> "Uninterruptible" HID: apple: Add support for Keychron K1 wireless keyboard HID: fix typo in Kconfig HID: ft260: fix format type warning in ft260_word_show() HID: amd_sfh: Use correct MMIO register for DMA address HID: asus: Remove check for same LED brightness on set HID: intel-ish-hid: use async resume function
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "7 patches. Subsystems affected by this patch series: lib, ocfs2, and mm (slub, migration, and memcg)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm/memcg: fix NULL pointer dereference in memcg_slab_free_hook() slub: fix unreclaimable slab stat for bulk free mm/migrate: fix NR_ISOLATED corruption on 64-bit mm: memcontrol: fix blocking rstat function called from atomic cgroup1 thresholding code ocfs2: issue zeroout to EOF blocks ocfs2: fix zero out valid data lib/test_string.c: move string selftest in the Runtime Testing menu
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Jakub Kicinski authored
Merge tag 'linux-can-fixes-for-5.14-20210730' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can Marc Kleine-Budde says: ==================== pull-request: can 2021-07-30 The first patch is by me and adds Yasushi SHOJI as a reviewer for the Microchip CAN BUS Analyzer Tool driver. Dan Carpenter's patch fixes a signedness bug in the hi311x driver. Pavel Skripkin provides 4 patches, the first targets the mcba_usb driver by adding the missing urb->transfer_dma initialization, which was broken in a previous commit. The last 3 patches fix a memory leak in the usb_8dev, ems_usb and esd_usb2 driver. * tag 'linux-can-fixes-for-5.14-20210730' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can: can: esd_usb2: fix memory leak can: ems_usb: fix memory leak can: usb_8dev: fix memory leak can: mcba_usb_start(): add missing urb->transfer_dma initialization can: hi311x: fix a signedness bug in hi3110_cmd() MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver ==================== Link: https://lore.kernel.org/r/20210730070526.1699867-1-mkl@pengutronix.de Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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Wang Hai authored
When I use kfree_rcu() to free a large memory allocated by kmalloc_node(), the following dump occurs. BUG: kernel NULL pointer dereference, address: 0000000000000020 [...] Oops: 0000 [#1] SMP [...] Workqueue: events kfree_rcu_work RIP: 0010:__obj_to_index include/linux/slub_def.h:182 [inline] RIP: 0010:obj_to_index include/linux/slub_def.h:191 [inline] RIP: 0010:memcg_slab_free_hook+0x120/0x260 mm/slab.h:363 [...] Call Trace: kmem_cache_free_bulk+0x58/0x630 mm/slub.c:3293 kfree_bulk include/linux/slab.h:413 [inline] kfree_rcu_work+0x1ab/0x200 kernel/rcu/tree.c:3300 process_one_work+0x207/0x530 kernel/workqueue.c:2276 worker_thread+0x320/0x610 kernel/workqueue.c:2422 kthread+0x13d/0x160 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 When kmalloc_node() a large memory, page is allocated, not slab, so when freeing memory via kfree_rcu(), this large memory should not be used by memcg_slab_free_hook(), because memcg_slab_free_hook() is is used for slab. Using page_objcgs_check() instead of page_objcgs() in memcg_slab_free_hook() to fix this bug. Link: https://lkml.kernel.org/r/20210728145655.274476-1-wanghai38@huawei.com Fixes: 270c6a71 ("mm: memcontrol/slab: Use helpers to access slab page's memcg_data") Signed-off-by:
Wang Hai <wanghai38@huawei.com> Reviewed-by:
Shakeel Butt <shakeelb@google.com> Acked-by:
Michal Hocko <mhocko@suse.com> Acked-by:
Roman Gushchin <guro@fb.com> Reviewed-by:
Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by:
Muchun Song <songmuchun@bytedance.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Shakeel Butt authored
SLUB uses page allocator for higher order allocations and update unreclaimable slab stat for such allocations. At the moment, the bulk free for SLUB does not share code with normal free code path for these type of allocations and have missed the stat update. So, fix the stat update by common code. The user visible impact of the bug is the potential of inconsistent unreclaimable slab stat visible through meminfo and vmstat. Link: https://lkml.kernel.org/r/20210728155354.3440560-1-shakeelb@google.com Fixes: 6a486c0a ("mm, sl[ou]b: improve memory accounting") Signed-off-by:
Shakeel Butt <shakeelb@google.com> Acked-by:
Michal Hocko <mhocko@suse.com> Acked-by:
Roman Gushchin <guro@fb.com> Reviewed-by:
Muchun Song <songmuchun@bytedance.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Aneesh Kumar K.V authored
Similar to commit 2da9f630 ("mm/vmscan: fix NR_ISOLATED_FILE corruption on 64-bit") avoid using unsigned int for nr_pages. With unsigned int type the large unsigned int converts to a large positive signed long. Symptoms include CMA allocations hanging forever due to alloc_contig_range->...->isolate_migratepages_block waiting forever in "while (unlikely(too_many_isolated(pgdat)))". Link: https://lkml.kernel.org/r/20210728042531.359409-1-aneesh.kumar@linux.ibm.com Fixes: c5fc5c3a ("mm: migrate: account THP NUMA migration counters correctly") Signed-off-by:
Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Reported-by:
Michael Ellerman <mpe@ellerman.id.au> Reported-by:
Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by:
Yang Shi <shy828301@gmail.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: David Hildenbrand <david@redhat.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Johannes Weiner authored
Dan Carpenter reports: The patch 2d146aa3: "mm: memcontrol: switch to rstat" from Apr 29, 2021, leads to the following static checker warning: kernel/cgroup/rstat.c:200 cgroup_rstat_flush() warn: sleeping in atomic context mm/memcontrol.c 3572 static unsigned long mem_cgroup_usage(struct mem_cgroup *memcg, bool swap) 3573 { 3574 unsigned long val; 3575 3576 if (mem_cgroup_is_root(memcg)) { 3577 cgroup_rstat_flush(memcg->css.cgroup); ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ This is from static analysis and potentially a false positive. The problem is that mem_cgroup_usage() is called from __mem_cgroup_threshold() which holds an rcu_read_lock(). And the cgroup_rstat_flush() function can sleep. 3578 val = memcg_page_state(memcg, NR_FILE_PAGES) + 3579 memcg_page_state(memcg, NR_ANON_MAPPED); 3580 if (swap) 3581 val += memcg_page_state(memcg, MEMCG_SWAP); 3582 } else { 3583 if (!swap) 3584 val = page_counter_read(&memcg->memory); 3585 else 3586 val = page_counter_read(&memcg->memsw); 3587 } 3588 return val; 3589 } __mem_cgroup_threshold() indeed holds the rcu lock. In addition, the thresholding code is invoked during stat changes, and those contexts have irqs disabled as well. If the lock breaking occurs inside the flush function, it will result in a sleep from an atomic context. Use the irqsafe flushing variant in mem_cgroup_usage() to fix this. Link: https://lkml.kernel.org/r/20210726150019.251820-1-hannes@cmpxchg.org Fixes: 2d146aa3 ("mm: memcontrol: switch to rstat") Signed-off-by:
Johannes Weiner <hannes@cmpxchg.org> Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
Chris Down <chris@chrisdown.name> Reviewed-by:
Rik van Riel <riel@surriel.com> Acked-by:
Michal Hocko <mhocko@suse.com> Reviewed-by:
Shakeel Butt <shakeelb@google.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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