- May 29, 2018
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Florian Westphal authored
harmless, but it avoids sparse warnings: nf_tables_api.c:2813:16: warning: incorrect type in return expression (different base types) nf_tables_api.c:2863:47: warning: incorrect type in argument 3 (different base types) nf_tables_api.c:3524:47: warning: incorrect type in argument 3 (different base types) nf_tables_api.c:3538:55: warning: incorrect type in argument 3 (different base types) Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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Florian Westphal authored
Just use .call_rcu instead. We can drop the rcu read lock after obtaining a reference and re-acquire on return. Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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Wei Yongjun authored
Fixes the following sparse warning: net/netfilter/nf_nat_core.c:1039:20: warning: symbol 'nat_hook' was not declared. Should it be static? Signed-off-by:
Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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Florian Westphal authored
synchronize_rcu() is expensive. The commit phase currently enforces an unconditional synchronize_rcu() after incrementing the generation counter. This is to make sure that a packet always sees a consistent chain, either nft_do_chain is still using old generation (it will skip the newly added rules), or the new one (it will skip old ones that might still be linked into the list). We could just remove the synchronize_rcu(), it would not cause a crash but it could cause us to evaluate a rule that was removed and new rule for the same packet, instead of either-or. To resolve this, add rule pointer array holding two generations, the current one and the future generation. In commit phase, allocate the rule blob and populate it with the rules that will be active in the new generation. Then, make this rule blob public, replacing the old generation pointer. Then the generation counter can be incremented. nft_do_chain() will either continue to use the current generation (in case loop was invoked right before increment), or the new one. Suggested-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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Florian Westphal authored
->commit() cannot fail at the moment. Followup-patch adds kmalloc calls in the commit phase, so we'll need to be able to handle errors. Make it so that -EGAIN causes a full replay, and make other errors cause the transaction to fail. Failing is ok from a consistency point of view as long as we perform all actions that could return an error before we increment the generation counter and the base seq. Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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Florian Westphal authored
Similar to previous patch, this time, merge redirect+nat. The redirect module is just 2k in size, get rid of it and make redirect part available from the nat core. before: text data bss dec hex filename 19461 1484 4138 25083 61fb net/netfilter/nf_nat.ko 1236 792 0 2028 7ec net/netfilter/nf_nat_redirect.ko after: 20340 1508 4138 25986 6582 net/netfilter/nf_nat.ko Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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Florian Westphal authored
Instead of using extra modules for these, turn the config options into an implicit dependency that adds masq feature to the protocol specific nf_nat module. before: text data bss dec hex filename 2001 860 4 2865 b31 net/ipv4/netfilter/nf_nat_masquerade_ipv4.ko 5579 780 2 6361 18d9 net/ipv4/netfilter/nf_nat_ipv4.ko 2860 836 8 3704 e78 net/ipv6/netfilter/nf_nat_masquerade_ipv6.ko 6648 780 2 7430 1d06 net/ipv6/netfilter/nf_nat_ipv6.ko after: text data bss dec hex filename 7245 872 8 8125 1fbd net/ipv4/netfilter/nf_nat_ipv4.ko 9165 848 12 10025 2729 net/ipv6/netfilter/nf_nat_ipv6.ko Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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Máté Eckl authored
These have to be included always when nf_socket.h is included. Signed-off-by:
Máté Eckl <ecklm94@gmail.com> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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- May 27, 2018
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller authored
Lots of easy overlapping changes in the confict resolutions here. Signed-off-by:
David S. Miller <davem@davemloft.net>
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- May 26, 2018
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "16 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: kasan: fix memory hotplug during boot kasan: free allocated shadow memory on MEM_CANCEL_ONLINE checkpatch: fix macro argument precedence test init/main.c: include <linux/mem_encrypt.h> kernel/sys.c: fix potential Spectre v1 issue mm/memory_hotplug: fix leftover use of struct page during hotplug proc: fix smaps and meminfo alignment mm: do not warn on offline nodes unless the specific node is explicitly requested mm, memory_hotplug: make has_unmovable_pages more robust mm/kasan: don't vfree() nonexistent vm_area MAINTAINERS: change hugetlbfs maintainer and update files ipc/shm: fix shmat() nil address after round-down when remapping Revert "ipc/shm: Fix shmat mmap nil-page protection" idr: fix invalid ptr dereference on item delete ocfs2: revert "ocfs2/o2hb: check len for bio_add_page() to avoid getting incorrect bio" mm: fix nr_rotate_swap leak in swapon() error case
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: "Let's begin the holiday weekend with some networking fixes: 1) Whoops need to restrict cfg80211 wiphy names even more to 64 bytes. From Eric Biggers. 2) Fix flags being ignored when using kernel_connect() with SCTP, from Xin Long. 3) Use after free in DCCP, from Alexey Kodanev. 4) Need to check rhltable_init() return value in ipmr code, from Eric Dumazet. 5) XDP handling fixes in virtio_net from Jason Wang. 6) Missing RTA_TABLE in rtm_ipv4_policy[], from Roopa Prabhu. 7) Need to use IRQ disabling spinlocks in mlx4_qp_lookup(), from Jack Morgenstein. 8) Prevent out-of-bounds speculation using indexes in BPF, from Daniel Borkmann. 9) Fix regression added by AF_PACKET link layer cure, from Willem de Bruijn. 10) Correct ENIC dma mask, from Govindarajulu Varadarajan. 11) Missing config options for PMTU tests, from Stefano Brivio" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (48 commits) ibmvnic: Fix partial success login retries selftests/net: Add missing config options for PMTU tests mlx4_core: allocate ICM memory in page size chunks enic: set DMA mask to 47 bit ppp: remove the PPPIOCDETACH ioctl ipv4: remove warning in ip_recv_error net : sched: cls_api: deal with egdev path only if needed vhost: synchronize IOTLB message with dev cleanup packet: fix reserve calculation net/mlx5: IPSec, Fix a race between concurrent sandbox QP commands net/mlx5e: When RXFCS is set, add FCS data into checksum calculation bpf: properly enforce index mask to prevent out-of-bounds speculation net/mlx4: Fix irq-unsafe spinlock usage net: phy: broadcom: Fix bcm_write_exp() net: phy: broadcom: Fix auxiliary control register reads net: ipv4: add missing RTA_TABLE to rtm_ipv4_policy net/mlx4: fix spelling mistake: "Inrerface" -> "Interface" and rephrase message ibmvnic: Only do H_EOI for mobility events tuntap: correctly set SOCKWQ_ASYNC_NOSPACE virtio-net: fix leaking page for gso packet during mergeable XDP ...
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David Hildenbrand authored
Using module_init() is wrong. E.g. ACPI adds and onlines memory before our memory notifier gets registered. This makes sure that ACPI memory detected during boot up will not result in a kernel crash. Easily reproducible with QEMU, just specify a DIMM when starting up. Link: http://lkml.kernel.org/r/20180522100756.18478-3-david@redhat.com Fixes: 786a8959 ("kasan: disable memory hotplug") Signed-off-by:
David Hildenbrand <david@redhat.com> Acked-by:
Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@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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David Hildenbrand authored
We have to free memory again when we cancel onlining, otherwise a later onlining attempt will fail. Link: http://lkml.kernel.org/r/20180522100756.18478-2-david@redhat.com Fixes: fa69b598 ("mm/kasan: add support for memory hotplug") Signed-off-by:
David Hildenbrand <david@redhat.com> Acked-by:
Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@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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Joe Perches authored
checkpatch's macro argument precedence test is broken so fix it. Link: http://lkml.kernel.org/r/5dd900e9197febc1995604bb33c23c136d8b33ce.camel@perches.com Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Mathieu Malaterre authored
In commit c7753208 ("x86, swiotlb: Add memory encryption support") a call to function `mem_encrypt_init' was added. Include prototype defined in header <linux/mem_encrypt.h> to prevent a warning reported during compilation with W=1: init/main.c:494:20: warning: no previous prototype for `mem_encrypt_init' [-Wmissing-prototypes] Link: http://lkml.kernel.org/r/20180522195533.31415-1-malat@debian.org Signed-off-by:
Mathieu Malaterre <malat@debian.org> Reviewed-by:
Andrew Morton <akpm@linux-foundation.org> Acked-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kees Cook <keescook@chromium.org> Cc: Laura Abbott <lauraa@codeaurora.org> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Gargi Sharma <gs051095@gmail.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Gustavo A. R. Silva authored
`resource' can be controlled by user-space, hence leading to a potential exploitation of the Spectre variant 1 vulnerability. This issue was detected with the help of Smatch: kernel/sys.c:1474 __do_compat_sys_old_getrlimit() warn: potential spectre issue 'get_current()->signal->rlim' (local cap) kernel/sys.c:1455 __do_sys_old_getrlimit() warn: potential spectre issue 'get_current()->signal->rlim' (local cap) Fix this by sanitizing *resource* before using it to index current->signal->rlim Notice that given that speculation windows are large, the policy is to kill the speculation on the first load and not worry if it can be completed with a dependent load/store [1]. [1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2 Link: http://lkml.kernel.org/r/20180515030038.GA11822@embeddedor.com Signed-off-by:
Gustavo A. R. Silva <gustavo@embeddedor.com> Reviewed-by:
Andrew Morton <akpm@linux-foundation.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.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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Jonathan Cameron authored
The case of a new numa node got missed in avoiding using the node info from page_struct during hotplug. In this path we have a call to register_mem_sect_under_node (which allows us to specify it is hotplug so don't change the node), via link_mem_sections which unfortunately does not. Fix is to pass check_nid through link_mem_sections as well and disable it in the new numa node path. Note the bug only 'sometimes' manifests depending on what happens to be in the struct page structures - there are lots of them and it only needs to match one of them. The result of the bug is that (with a new memory only node) we never successfully call register_mem_sect_under_node so don't get the memory associated with the node in sysfs and meminfo for the node doesn't report it. It came up whilst testing some arm64 hotplug patches, but appears to be universal. Whilst I'm triggering it by removing then reinserting memory to a node with no other elements (thus making the node disappear then appear again), it appears it would happen on hotplugging memory where there was none before and it doesn't seem to be related the arm64 patches. These patches call __add_pages (where most of the issue was fixed by Pavel's patch). If there is a node at the time of the __add_pages call then all is well as it calls register_mem_sect_under_node from there with check_nid set to false. Without a node that function returns having not done the sysfs related stuff as there is no node to use. This is expected but it is the resulting path that fails... Exact path to the problem is as follows: mm/memory_hotplug.c: add_memory_resource() The node is not online so we enter the 'if (new_node)' twice, on the second such block there is a call to link_mem_sections which calls into drivers/node.c: link_mem_sections() which calls drivers/node.c: register_mem_sect_under_node() which calls get_nid_for_pfn and keeps trying until the output of that matches the expected node (passed all the way down from add_memory_resource) It is effectively the same fix as the one referred to in the fixes tag just in the code path for a new node where the comments point out we have to rerun the link creation because it will have failed in register_new_memory (as there was no node at the time). (actually that comment is wrong now as we don't have register_new_memory any more it got renamed to hotplug_memory_register in Pavel's patch). Link: http://lkml.kernel.org/r/20180504085311.1240-1-Jonathan.Cameron@huawei.com Fixes: fc44f7f9 ("mm/memory_hotplug: don't read nid from struct page during hotplug") Signed-off-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by:
Pavel Tatashin <pasha.tatashin@oracle.com> Acked-by:
Michal Hocko <mhocko@suse.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Hugh Dickins authored
The 4.17-rc /proc/meminfo and /proc/<pid>/smaps look ugly: single-digit numbers (commonly 0) are misaligned. Remove seq_put_decimal_ull_width()'s leftover optimization for single digits: it's wrong now that num_to_str() takes care of the width. Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1805241554210.1326@eggly.anvils Fixes: d1be35cb ("proc: add seq_put_decimal_ull_width to speed up /proc/pid/smaps") Signed-off-by:
Hugh Dickins <hughd@google.com> Cc: Andrei Vagin <avagin@openvz.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michal Hocko authored
Oscar has noticed that we splat WARNING: CPU: 0 PID: 64 at ./include/linux/gfp.h:467 vmemmap_alloc_block+0x4e/0xc9 [...] CPU: 0 PID: 64 Comm: kworker/u4:1 Tainted: G W E 4.17.0-rc5-next-20180517-1-default+ #66 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014 Workqueue: kacpi_hotplug acpi_hotplug_work_fn Call Trace: vmemmap_populate+0xf2/0x2ae sparse_mem_map_populate+0x28/0x35 sparse_add_one_section+0x4c/0x187 __add_pages+0xe7/0x1a0 add_pages+0x16/0x70 add_memory_resource+0xa3/0x1d0 add_memory+0xe4/0x110 acpi_memory_device_add+0x134/0x2e0 acpi_bus_attach+0xd9/0x190 acpi_bus_scan+0x37/0x70 acpi_device_hotplug+0x389/0x4e0 acpi_hotplug_work_fn+0x1a/0x30 process_one_work+0x146/0x340 worker_thread+0x47/0x3e0 kthread+0xf5/0x130 ret_from_fork+0x35/0x40 when adding memory to a node that is currently offline. The VM_WARN_ON is just too loud without a good reason. In this particular case we are doing alloc_pages_node(node, GFP_KERNEL|__GFP_RETRY_MAYFAIL|__GFP_NOWARN, order) so we do not insist on allocating from the given node (it is more a hint) so we can fall back to any other populated node and moreover we explicitly ask to not warn for the allocation failure. Soften the warning only to cases when somebody asks for the given node explicitly by __GFP_THISNODE. Link: http://lkml.kernel.org/r/20180523125555.30039-3-mhocko@kernel.org Signed-off-by:
Michal Hocko <mhocko@suse.com> Reported-by:
Oscar Salvador <osalvador@techadventures.net> Tested-by:
Oscar Salvador <osalvador@techadventures.net> Reviewed-by:
Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Reza Arbab <arbab@linux.vnet.ibm.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michal Hocko authored
Oscar has reported: : Due to an unfortunate setting with movablecore, memblocks containing bootmem : memory (pages marked by get_page_bootmem()) ended up marked in zone_movable. : So while trying to remove that memory, the system failed in do_migrate_range : and __offline_pages never returned. : : This can be reproduced by running : qemu-system-x86_64 -m 6G,slots=8,maxmem=8G -numa node,mem=4096M -numa node,mem=2048M : and movablecore=4G kernel command line : : linux kernel: BIOS-provided physical RAM map: : linux kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable : linux kernel: BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved : linux kernel: BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved : linux kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000bffdffff] usable : linux kernel: BIOS-e820: [mem 0x00000000bffe0000-0x00000000bfffffff] reserved : linux kernel: BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved : linux kernel: BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved : linux kernel: BIOS-e820: [mem 0x0000000100000000-0x00000001bfffffff] usable : linux kernel: NX (Execute Disable) protection: active : linux kernel: SMBIOS 2.8 present. : linux kernel: DMI: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org : linux kernel: Hypervisor detected: KVM : linux kernel: e820: update [mem 0x00000000-0x00000fff] usable ==> reserved : linux kernel: e820: remove [mem 0x000a0000-0x000fffff] usable : linux kernel: last_pfn = 0x1c0000 max_arch_pfn = 0x400000000 : : linux kernel: SRAT: PXM 0 -> APIC 0x00 -> Node 0 : linux kernel: SRAT: PXM 1 -> APIC 0x01 -> Node 1 : linux kernel: ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff] : linux kernel: ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff] : linux kernel: ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x13fffffff] : linux kernel: ACPI: SRAT: Node 1 PXM 1 [mem 0x140000000-0x1bfffffff] : linux kernel: ACPI: SRAT: Node 0 PXM 0 [mem 0x1c0000000-0x43fffffff] hotplug : linux kernel: NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x0 : linux kernel: NUMA: Node 0 [mem 0x00000000-0xbfffffff] + [mem 0x100000000-0x13fffffff] -> [mem 0 : linux kernel: NODE_DATA(0) allocated [mem 0x13ffd6000-0x13fffffff] : linux kernel: NODE_DATA(1) allocated [mem 0x1bffd3000-0x1bfffcfff] : : zoneinfo shows that the zone movable is placed into both numa nodes: : Node 0, zone Movable : pages free 160140 : min 1823 : low 2278 : high 2733 : spanned 262144 : present 262144 : managed 245670 : Node 1, zone Movable : pages free 448427 : min 3827 : low 4783 : high 5739 : spanned 524288 : present 524288 : managed 515766 Note how only Node 0 has a hutplugable memory region which would rule it out from the early memblock allocations (most likely memmap). Node1 will surely contain memmaps on the same node and those would prevent offlining to succeed. So this is arguably a configuration issue. Although one could argue that we should be more clever and rule early allocations from the zone movable. This would be correct but probably not worth the effort considering what a hack movablecore is. Anyway, We could do better for those cases though. We rely on start_isolate_page_range resp. has_unmovable_pages to do their job. The first one isolates the whole range to be offlined so that we do not allocate from it anymore and the later makes sure we are not stumbling over non-migrateable pages. has_unmovable_pages is overly optimistic, however. It doesn't check all the pages if we are withing zone_movable because we rely that those pages will be always migrateable. As it turns out we are still not perfect there. While bootmem pages in zonemovable sound like a clear bug which should be fixed let's remove the optimization for now and warn if we encounter unmovable pages in zone_movable in the meantime. That should help for now at least. Btw. this wasn't a real problem until commit 72b39cfc ("mm, memory_hotplug: do not fail offlining too early") because we used to have a small number of retries and then failed. This turned out to be too fragile though. Link: http://lkml.kernel.org/r/20180523125555.30039-2-mhocko@kernel.org Signed-off-by:
Michal Hocko <mhocko@suse.com> Reported-by:
Oscar Salvador <osalvador@techadventures.net> Tested-by:
Oscar Salvador <osalvador@techadventures.net> Reviewed-by:
Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Reza Arbab <arbab@linux.vnet.ibm.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Andrey Ryabinin authored
KASAN uses different routines to map shadow for hot added memory and memory obtained in boot process. Attempt to offline memory onlined by normal boot process leads to this: Trying to vfree() nonexistent vm area (000000005d3b34b9) WARNING: CPU: 2 PID: 13215 at mm/vmalloc.c:1525 __vunmap+0x147/0x190 Call Trace: kasan_mem_notifier+0xad/0xb9 notifier_call_chain+0x166/0x260 __blocking_notifier_call_chain+0xdb/0x140 __offline_pages+0x96a/0xb10 memory_subsys_offline+0x76/0xc0 device_offline+0xb8/0x120 store_mem_state+0xfa/0x120 kernfs_fop_write+0x1d5/0x320 __vfs_write+0xd4/0x530 vfs_write+0x105/0x340 SyS_write+0xb0/0x140 Obviously we can't call vfree() to free memory that wasn't allocated via vmalloc(). Use find_vm_area() to see if we can call vfree(). Unfortunately it's a bit tricky to properly unmap and free shadow allocated during boot, so we'll have to keep it. If memory will come online again that shadow will be reused. Matthew asked: how can you call vfree() on something that isn't a vmalloc address? vfree() is able to free any address returned by __vmalloc_node_range(). And __vmalloc_node_range() gives you any address you ask. It doesn't have to be an address in [VMALLOC_START, VMALLOC_END] range. That's also how the module_alloc()/module_memfree() works on architectures that have designated area for modules. [aryabinin@virtuozzo.com: improve comments] Link: http://lkml.kernel.org/r/dabee6ab-3a7a-51cd-3b86-5468718e0390@virtuozzo.com [akpm@linux-foundation.org: fix typos, reflow comment] Link: http://lkml.kernel.org/r/20180201163349.8700-1-aryabinin@virtuozzo.com Fixes: fa69b598 ("mm/kasan: add support for memory hotplug") Signed-off-by:
Andrey Ryabinin <aryabinin@virtuozzo.com> Reported-by:
Paul Menzel <pmenzel+linux-kasan-dev@molgen.mpg.de> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Matthew Wilcox <willy@infradead.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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Mike Kravetz authored
The current hugetlbfs maintainer has not been active for more than a few years. I have been been active in this area for more than two years and plan to remain active in the foreseeable future. Also, update the hugetlbfs entry to include linux-mm mail list and additional hugetlbfs related files. hugetlb.c and hugetlb.h are not 100% hugetlbfs, but a majority of their content is hugetlbfs related. Link: http://lkml.kernel.org/r/20180518225236.19079-1-mike.kravetz@oracle.com Signed-off-by:
Mike Kravetz <mike.kravetz@oracle.com> Acked-by:
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by:
Vlastimil Babka <vbabka@suse.cz> Acked-by:
Michal Hocko <mhocko@suse.com> Cc: Nadia Yvette Chambers <nyc@holomorphy.com> Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Davidlohr Bueso authored
shmat()'s SHM_REMAP option forbids passing a nil address for; this is in fact the very first thing we check for. Andrea reported that for SHM_RND|SHM_REMAP cases we can end up bypassing the initial addr check, but we need to check again if the address was rounded down to nil. As of this patch, such cases will return -EINVAL. Link: http://lkml.kernel.org/r/20180503204934.kk63josdu6u53fbd@linux-n805 Signed-off-by:
Davidlohr Bueso <dbueso@suse.de> Reported-by:
Andrea Arcangeli <aarcange@redhat.com> Cc: Joe Lawrence <joe.lawrence@redhat.com> Cc: Manfred Spraul <manfred@colorfullife.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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Davidlohr Bueso authored
Patch series "ipc/shm: shmat() fixes around nil-page". These patches fix two issues reported[1] a while back by Joe and Andrea around how shmat(2) behaves with nil-page. The first reverts a commit that it was incorrectly thought that mapping nil-page (address=0) was a no no with MAP_FIXED. This is not the case, with the exception of SHM_REMAP; which is address in the second patch. I chose two patches because it is easier to backport and it explicitly reverts bogus behaviour. Both patches ought to be in -stable and ltp testcases need updated (the added testcase around the cve can be modified to just test for SHM_RND|SHM_REMAP). [1] lkml.kernel.org/r/20180430172152.nfa564pvgpk3ut7p@linux-n805 This patch (of 2): Commit 95e91b83 ("ipc/shm: Fix shmat mmap nil-page protection") worked on the idea that we should not be mapping as root addr=0 and MAP_FIXED. However, it was reported that this scenario is in fact valid, thus making the patch both bogus and breaks userspace as well. For example X11's libint10.so relies on shmat(1, SHM_RND) for lowmem initialization[1]. [1] https://cgit.freedesktop.org/xorg/xserver/tree/hw/xfree86/os-support/linux/int10/linux.c#n347 Link: http://lkml.kernel.org/r/20180503203243.15045-2-dave@stgolabs.net Fixes: 95e91b83 ("ipc/shm: Fix shmat mmap nil-page protection") Signed-off-by:
Davidlohr Bueso <dbueso@suse.de> Reported-by:
Joe Lawrence <joe.lawrence@redhat.com> Reported-by:
Andrea Arcangeli <aarcange@redhat.com> Cc: Manfred Spraul <manfred@colorfullife.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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Matthew Wilcox authored
If the radix tree underlying the IDR happens to be full and we attempt to remove an id which is larger than any id in the IDR, we will call __radix_tree_delete() with an uninitialised 'slot' pointer, at which point anything could happen. This was easiest to hit with a single entry at id 0 and attempting to remove a non-0 id, but it could have happened with 64 entries and attempting to remove an id >= 64. Roman said: The syzcaller test boils down to opening /dev/kvm, creating an eventfd, and calling a couple of KVM ioctls. None of this requires superuser. And the result is dereferencing an uninitialized pointer which is likely a crash. The specific path caught by syzbot is via KVM_HYPERV_EVENTD ioctl which is new in 4.17. But I guess there are other user-triggerable paths, so cc:stable is probably justified. Matthew added: We have around 250 calls to idr_remove() in the kernel today. Many of them pass an ID which is embedded in the object they're removing, so they're safe. Picking a few likely candidates: drivers/firewire/core-cdev.c looks unsafe; the ID comes from an ioctl. drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c is similar drivers/atm/nicstar.c could be taken down by a handcrafted packet Link: http://lkml.kernel.org/r/20180518175025.GD6361@bombadil.infradead.org Fixes: 0a835c4f ("Reimplement IDR and IDA using the radix tree") Reported-by:
<syzbot+35666cba7f0a337e2e79@syzkaller.appspotmail.com> Debugged-by:
Roman Kagan <rkagan@virtuozzo.com> Signed-off-by:
Matthew Wilcox <mawilcox@microsoft.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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Changwei Ge authored
This reverts commit ba16ddfb ("ocfs2/o2hb: check len for bio_add_page() to avoid getting incorrect bio"). In my testing, this patch introduces a problem that mkfs can't have slots more than 16 with 4k block size. And the original logic is safe actually with the situation it mentions so revert this commit. Attach test log: (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 0, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 1, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 2, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 3, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 4, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 5, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 6, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 7, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 8, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 9, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 10, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 11, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 12, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 13, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 14, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 15, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:463 page 16, vec_len = 4096, vec_start = 0 (mkfs.ocfs2,27479,2):o2hb_setup_one_bio:471 ERROR: Adding page[16] to bio failed, page ffffea0002d7ed40, len 0, vec_len 4096, vec_start 0,bi_sector 8192 (mkfs.ocfs2,27479,2):o2hb_read_slots:500 ERROR: status = -5 (mkfs.ocfs2,27479,2):o2hb_populate_slot_data:1911 ERROR: status = -5 (mkfs.ocfs2,27479,2):o2hb_region_dev_write:2012 ERROR: status = -5 Link: http://lkml.kernel.org/r/SIXPR06MB0461721F398A5A92FC68C39ED5920@SIXPR06MB0461.apcprd06.prod.outlook.com Signed-off-by:
Changwei Ge <ge.changwei@h3c.com> Cc: Jun Piao <piaojun@huawei.com> Cc: Yiwen Jiang <jiangyiwen@huawei.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Omar Sandoval authored
If swapon() fails after incrementing nr_rotate_swap, we don't decrement it and thus effectively leak it. Make sure we decrement it if we incremented it. Link: http://lkml.kernel.org/r/b6fe6b879f17fa68eee6cbd876f459f6e5e33495.1526491581.git.osandov@fb.com Fixes: 81a0298b ("mm, swap: don't use VMA based swap readahead if HDD is used as swap") Signed-off-by:
Omar Sandoval <osandov@fb.com> Reviewed-by:
Rik van Riel <riel@surriel.com> Reviewed-by:
"Huang, Ying" <ying.huang@intel.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Florian Fainelli authored
Remove redundant debug prints from phy_read/write since we can trace those calls through trace events. Enhance dynamic debug prints to print arguments which helps figuring how what is going on at the driver level with higher level configuration interfaces. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Yi-Hung Wei says: ==================== openvswitch: Support conntrack zone limit Currently, nf_conntrack_max is used to limit the maximum number of conntrack entries in the conntrack table for every network namespace. For the VMs and containers that reside in the same namespace, they share the same conntrack table, and the total # of conntrack entries for all the VMs and containers are limited by nf_conntrack_max. In this case, if one of the VM/container abuses the usage the conntrack entries, it blocks the others from committing valid conntrack entries into the conntrack table. Even if we can possibly put the VM in different network namespace, the current nf_conntrack_max configuration is kind of rigid that we cannot limit different VM/container to have different # conntrack entries. To address the aforementioned issue, this patch proposes to have a fine-grained mechanism that could further limit the # of conntrack entries per-zone. For example, we can designate different zone to different VM, and set conntrack limit to each zone. By providing this isolation, a mis-behaved VM only consumes the conntrack entries in its own zone, and it will not influence other well-behaved VMs. Moreover, the users can set various conntrack limit to different zone based on their preference. The proposed implementation utilizes Netfilter's nf_conncount backend to count the number of connections in a particular zone. If the number of connection is above a configured limitation, OVS will return ENOMEM to the userspace. If userspace does not configure the zone limit, the limit defaults to zero that is no limitation, which is backward compatible to the behavior without this patch. The first patch defines the conntrack limit netlink definition, and the second patch provides the implementation. v4->v5: - Addresses comments from Parvin that include log error msg in ovs_ct_limit_init(), handle deletion for default limit, and add a common helper for get zone limit. - Rebases to master. v3->v4: - Addresses comments from Parvin that include simplify netlink API, and remove unncessary RCU lockings. - Rebases to master. v2->v3: - Addresses comments from Parvin that include using static keys to check if ovs_ct_limit features is used, only check ct_limit when a ct entry is unconfirmed, and reports rate limited warning messages when the ct limit is reached. - Rebases to master. v1->v2: - Fixes commit log typos suggested by Greg. - Fixes memory free issue that Julia found. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yi-Hung Wei authored
Currently, nf_conntrack_max is used to limit the maximum number of conntrack entries in the conntrack table for every network namespace. For the VMs and containers that reside in the same namespace, they share the same conntrack table, and the total # of conntrack entries for all the VMs and containers are limited by nf_conntrack_max. In this case, if one of the VM/container abuses the usage the conntrack entries, it blocks the others from committing valid conntrack entries into the conntrack table. Even if we can possibly put the VM in different network namespace, the current nf_conntrack_max configuration is kind of rigid that we cannot limit different VM/container to have different # conntrack entries. To address the aforementioned issue, this patch proposes to have a fine-grained mechanism that could further limit the # of conntrack entries per-zone. For example, we can designate different zone to different VM, and set conntrack limit to each zone. By providing this isolation, a mis-behaved VM only consumes the conntrack entries in its own zone, and it will not influence other well-behaved VMs. Moreover, the users can set various conntrack limit to different zone based on their preference. The proposed implementation utilizes Netfilter's nf_conncount backend to count the number of connections in a particular zone. If the number of connection is above a configured limitation, ovs will return ENOMEM to the userspace. If userspace does not configure the zone limit, the limit defaults to zero that is no limitation, which is backward compatible to the behavior without this patch. The following high leve APIs are provided to the userspace: - OVS_CT_LIMIT_CMD_SET: * set default connection limit for all zones * set the connection limit for a particular zone - OVS_CT_LIMIT_CMD_DEL: * remove the connection limit for a particular zone - OVS_CT_LIMIT_CMD_GET: * get the default connection limit for all zones * get the connection limit for a particular zone Signed-off-by:
Yi-Hung Wei <yihung.wei@gmail.com> Acked-by:
Pravin B Shelar <pshelar@ovn.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yi-Hung Wei authored
Define netlink messages and attributes to support user kernel communication that uses the conntrack limit feature. Signed-off-by:
Yi-Hung Wei <yihung.wei@gmail.com> Acked-by:
Pravin B Shelar <pshelar@ovn.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linuxDavid S. Miller authored
Saeed Mahameed says: ==================== mlx5e-updates-2018-05-19 This series contains updates for mlx5e netdevice driver with one subject, DSCP to priority mapping, in the first patch Huy adds the needed API in dcbnl, the second patch adds the needed mlx5 core capability bits for the feature, and all other patches are mlx5e (netdev) only changes to add support for the feature. From: Huy Nguyen Dscp to priority mapping for Ethernet packet: These patches enable differentiated services code point (dscp) to priority mapping for Ethernet packet. Once this feature is enabled, the packet is routed to the corresponding priority based on its dscp. User can combine this feature with priority flow control (pfc) feature to have priority flow control based on the dscp. Firmware interface: Mellanox firmware provides two control knobs for this feature: QPTS register allow changing the trust state between dscp and pcp mode. The default is pcp mode. Once in dscp mode, firmware will route the packet based on its dscp value if the dscp field exists. QPDPM register allow mapping a specific dscp (0 to 63) to a specific priority (0 to 7). By default, all the dscps are mapped to priority zero. Software interface: This feature is controlled via application priority TLV. IEEE specification P802.1Qcd/D2.1 defines priority selector id 5 for application priority TLV. This APP TLV selector defines DSCP to priority map. This APP TLV can be sent by the switch or can be set locally using software such as lldptool. In mlx5 drivers, we add the support for net dcb's getapp and setapp call back. Mlx5 driver only handles the selector id 5 application entry (dscp application priority application entry). If user sends multiple dscp to priority APP TLV entries on the same dscp, the last sent one will take effect. All the previous sent will be deleted. This attribute combined with pfc attribute allows advanced user to fine tune the qos setting for specific priority queue. For example, user can give dedicated buffer for one or more priorities or user can give large buffer to certain priorities. The dcb buffer configuration will be controlled by lldptool. >> lldptool -T -i eth2 -V BUFFER prio 0,2,5,7,1,2,3,6 maps priorities 0,1,2,3,4,5,6,7 to receive buffer 0,2,5,7,1,2,3,6 >> lldptool -T -i eth2 -V BUFFER size 87296,87296,0,87296,0,0,0,0 sets receive buffer size for buffer 0,1,2,3,4,5,6,7 respectively After discussion on mailing list with Jakub, Jiri, Ido and John, we agreed to choose dcbnl over devlink interface since this feature is intended to set port attributes which are governed by the netdev instance of that port, where devlink API is more suitable for global ASIC configurations. The firmware trust state (in QPTS register) is changed based on the number of dscp to priority application entries. When the first dscp to priority application entry is added by the user, the trust state is changed to dscp. When the last dscp to priority application entry is deleted by the user, the trust state is changed to pcp. When the port is in DSCP trust state, the transmit queue is selected based on the dscp of the skb. When the port is in DSCP trust state and vport inline mode is not NONE, firmware requires mlx5 driver to copy the IP header to the wqe ethernet segment inline header if the skb has it. This is done by changing the transmit queue sq's min inline mode to L3. Note that the min inline mode of sqs that belong to other features such as xdpsq, icosq are not modified. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Bo Chen authored
The call to free_netdev() in __rtl8139_cleanup_dev() clears the network device napi list, and explicit calls to netif_napi_del() are unnecessary. Signed-off-by:
Bo Chen <chenbo@pdx.edu> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Thomas Falcon authored
In its current state, the driver will handle backing device login in a loop for a certain number of retries while the device returns a partial success, indicating that the driver may need to try again using a smaller number of resources. The variable it checks to continue retrying may change over the course of operations, resulting in reallocation of resources but exits without sending the login attempt. Guard against this by introducing a boolean variable that will retain the state indicating that the driver needs to reattempt login with backing device firmware. Signed-off-by:
Thomas Falcon <tlfalcon@linux.vnet.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Manish Chopra says: ==================== qed*: ethtool rx flow classification enhancements. This series re-structures the driver's ethtool rx flow classification flow, following that it adds other flow profiles and rx flow classification enhancements via "ethtool -N/-U" Please consider applying this to "net-next" ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Manish Chopra authored
With this patch, User can configure for the supported flows to be dropped. Added a stat "gft_filter_drop" as well to be populated in ethtool for the dropped flows. For example - ethtool -N p5p1 flow-type udp4 dst-port 8000 action -1 ethtool -N p5p1 flow-type tcp4 scr-ip 192.168.8.1 action -1 Signed-off-by:
Manish Chopra <manish.chopra@cavium.com> Signed-off-by:
Shahed Shaikh <shahed.shaikh@cavium.com> Signed-off-by:
Ariel Elior <ariel.elior@cavium.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Manish Chopra authored
With the supported classification modes [4 tuples based, udp port based, src-ip based], flows can be classified to the VFs as well. With this patch, flows can be re-directed to the requested VF provided in "action" field of command. Please note that driver doesn't really care about the queue bits in "action" field for the VFs. Since queue will be still chosen by FW using RSS hash. [I.e., the classification would be done according to vport-only] For examples - ethtool -N p5p1 flow-type udp4 dst-port 8000 action 0x100000000 ethtool -N p5p1 flow-type tcp4 src-ip 192.16.6.10 action 0x200000000 ethtool -U p5p1 flow-type tcp4 src-ip 192.168.40.100 dst-ip \ 192.168.40.200 src-port 6660 dst-port 5550 \ action 0x100000000 Signed-off-by:
Manish Chopra <manish.chopra@cavium.com> Signed-off-by:
Shahed Shaikh <shahed.shaikh@cavium.com> Signed-off-by:
Ariel Elior <ariel.elior@cavium.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Manish Chopra authored
Currently, driver supports flow classification to PF receive queues based on TCP/UDP 4 tuples [src_ip, dst_ip, src_port, dst_port] only. This patch enables to configure different flow profiles [For example - only UDP dest port or src_ip based] on the adapter so that classification can be done according to just those fields as well. Although, at a time just one type of flow configuration is supported due to limited number of flow profiles available on the device. For example - ethtool -N enp7s0f0 flow-type udp4 dst-port 45762 action 2 ethtool -N enp7s0f0 flow-type tcp4 src-ip 192.16.4.10 action 1 ethtool -N enp7s0f0 flow-type udp6 dst-port 45762 action 3 Signed-off-by:
Manish Chopra <manish.chopra@cavium.com> Signed-off-by:
Shahed Shaikh <shahed.shaikh@cavium.com> Signed-off-by:
Ariel Elior <ariel.elior@cavium.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Manish Chopra authored
Validate and prevent some of the configurations for unsupported [by firmware] inputs [for example - mac ext, vlans, masks/prefix, tos/tclass] via ethtool -N/-U. Signed-off-by:
Manish Chopra <manish.chopra@cavium.com> Signed-off-by:
Shahed Shaikh <shahed.shaikh@cavium.com> Signed-off-by:
Ariel Elior <ariel.elior@cavium.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Manish Chopra authored
This patch simplifies the ethtool rx flow configuration [via ethtool -U/-N] flow code base by dividing it logically into various APIs based on given protocols. It also separates various validations and calculations done along the flow in their own APIs. Signed-off-by:
Manish Chopra <manish.chopra@cavium.com> Signed-off-by:
Shahed Shaikh <shahed.shaikh@cavium.com> Signed-off-by:
Ariel Elior <ariel.elior@cavium.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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