Commit 3bfd65ea authored by Alexander Shishkin's avatar Alexander Shishkin Committed by Zheng Zengkai
Browse files

intel_th: msu: Fix vmalloced buffers

stable inclusion
from stable-v5.10.137
commit 6ae2881c1d1fa0e33f4763b7c786f8ef05a9c828
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6ae2881c1d1fa0e33f4763b7c786f8ef05a9c828



--------------------------------

[ Upstream commit ac12ad3c ]

After commit f5ff79fd ("dma-mapping: remove CONFIG_DMA_REMAP") there's
a chance of DMA buffer getting allocated via vmalloc(), which messes up
the mmapping code:

> RIP: msc_mmap_fault [intel_th_msu]
> Call Trace:
>  <TASK>
>  __do_fault
>  do_fault
...

Fix this by accounting for vmalloc possibility.

Fixes: ba39bd83 ("intel_th: msu: Switch over to scatterlist")
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
Link: https://lore.kernel.org/r/20220705082637.59979-4-alexander.shishkin@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: default avatarWei Li <liwei391@huawei.com>
parent 9cbad0fb
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