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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2019-08-31 17:01:58 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-10 11:34:03 +0100 |
| commit | 87c9d62f8631befbf01ff7ac6230e4cfbbbbe9fb (patch) | |
| tree | 21259725608c5defe2e1e152dee7c83ac82f0832 /drivers | |
| parent | ecf4056e38e9170250ebf455241e84446ff0ff59 (diff) | |
ARM: mm: fix alignment handler faults under memory pressure
[ Upstream commit 67e15fa5b487adb9b78a92789eeff2d6ec8f5cee ]
When the system has high memory pressure, the page containing the
instruction may be paged out. Using probe_kernel_address() means that
if the page is swapped out, the resulting page fault will not be
handled because page faults are disabled by this function.
Use get_user() to read the instruction instead.
Reported-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Fixes: b255188f90e2 ("ARM: fix scheduling while atomic warning in alignment handling code")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions