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| author | Maxime Bizon <mbizon@freebox.fr> | 2012-10-22 13:19:28 +0400 |
|---|---|---|
| committer | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-11-18 05:40:57 +0400 |
| commit | b042e47491ba5f487601b5141a3f1d8582304170 (patch) | |
| tree | 3dd470e6eef9dc87c478a047850b3da718794ab2 /virt | |
| parent | 53f21a8ea1d76a002103ce20abd168fe83b20ee7 (diff) | |
| download | linux-b042e47491ba5f487601b5141a3f1d8582304170.tar.xz | |
pstore/ram: Fix undefined usage of rounddown_pow_of_two(0)
record_size / console_size / ftrace_size can be 0 (this is how you disable
the feature), but rounddown_pow_of_two(0) is undefined. As suggested by
Kees Cook, use !is_power_of_2() as a condition to call
rounddown_pow_of_two and avoid its undefined behavior on the value 0. This
issue has been present since commit 1894a253 (ramoops: Move to
fs/pstore/ram.c).
Cc: stable@vger.kernel.org
Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Florian Fainelli <ffainelli@freebox.fr>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions