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| author | Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> | 2007-11-14 16:58:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-14 18:45:37 -0800 |
| commit | 6fc48af82cef55546d640778698943b6227b7fb0 (patch) | |
| tree | b47f618967576fecae480caedabcd45c88073541 /kernel | |
| parent | dbd0cf48842700c3a694dcd32b29e63e27f37acc (diff) | |
| download | linux-6fc48af82cef55546d640778698943b6227b7fb0.tar.gz linux-6fc48af82cef55546d640778698943b6227b7fb0.tar.bz2 linux-6fc48af82cef55546d640778698943b6227b7fb0.zip | |
sysctl: check length at deprecated_sysctl_warning
Original patch assumed args->nlen < CTL_MAXNAME, but it can be false.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sysctl.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 3a1744fed2b6..0deed82a6156 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2620,6 +2620,10 @@ static int deprecated_sysctl_warning(struct __sysctl_args *args) int name[CTL_MAXNAME]; int i; + /* Check args->nlen. */ + if (args->nlen < 0 || args->nlen > CTL_MAXNAME) + return -ENOTDIR; + /* Read in the sysctl name for better debug message logging */ for (i = 0; i < args->nlen; i++) if (get_user(name[i], args->name + i)) |