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| author | Andrey Ryabinin <a.ryabinin@samsung.com> | 2014-05-07 08:07:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-11 12:03:23 -0700 |
| commit | b1da22af26d907e88925c2ce1a9ee527bd899875 (patch) | |
| tree | 3c5aebe24fa1a754f866a3edd191f3825df2b386 /kernel | |
| parent | c506847413e50969d24e26bc00595e982796a5dc (diff) | |
ARM: 8051/1: put_user: fix possible data corruption in put_user
commit 537094b64b229bf3ad146042f83e74cf6abe59df upstream.
According to arm procedure call standart r2 register is call-cloberred.
So after the result of x expression was put into r2 any following
function call in p may overwrite r2. To fix this, the result of p
expression must be saved to the temporary variable before the
assigment x expression to __r2.
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions