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[ 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>
a7a7df1659