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| author | Amanieu d'Antras <amanieu@gmail.com> | 2015-08-07 00:46:29 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-08-07 03:39:40 +0200 |
| commit | 26135022f85105ad725cda103fa069e29e83bd16 (patch) | |
| tree | 5e4f34c68105b76a88b96c467be46994d70fa5f8 /fs | |
| parent | signal: fix information leak in copy_siginfo_from_user32 (diff) | |
| download | linux-26135022f85105ad725cda103fa069e29e83bd16.tar.xz linux-26135022f85105ad725cda103fa069e29e83bd16.zip | |
signal: fix information leak in copy_siginfo_to_user
This function may copy the si_addr_lsb, si_lower and si_upper fields to
user mode when they haven't been initialized, which can leak kernel
stack data to user mode.
Just checking the value of si_code is insufficient because the same
si_code value is shared between multiple signals. This is solved by
checking the value of si_signo in addition to si_code.
Signed-off-by: Amanieu d'Antras <amanieu@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions