Messages in this thread Patch in this message | | | Subject | [PATCH] sysctl: Check length at deprecated_sysctl_warning. | From | Tetsuo Handa <> | Date | Tue, 13 Nov 2007 12:07:23 +0900 |
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Andrew, please replace previous patch with this one. This one returns -ENOTDIR. ----------
Original patch forgot to check args->nlen. I don't know why args->nlen == CTL_MAXNAME is rejected, but it has been rejected traditionally.
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> ---
kernel/sysctl.c | 4 ++++ 1 file changed, 4 insertions(+)
diff -puN kernel/sysctl.c~sysctl-check-length-at-deprecated_sysctl_warning kernel/sysctl.c --- a/kernel/sysctl.c~sysctl-check-length-at-deprecated_sysctl_warning +++ a/kernel/sysctl.c @@ -2609,6 +2609,10 @@ static int deprecated_sysctl_warning(str 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)) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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