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| author | Liping Zhang <zlpnobody@gmail.com> | 2017-04-07 17:51:06 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-04-07 18:46:44 +0200 |
| commit | 5380e5644afbba9e3d229c36771134976f05c91e (patch) | |
| tree | ec273fa8b308ad2c7a0a3d1fa3cc8f8b092c602f /kernel/sysctl.c | |
| parent | sysctl: add sanity check for proc_douintvec (diff) | |
| download | linux-5380e5644afbba9e3d229c36771134976f05c91e.tar.xz linux-5380e5644afbba9e3d229c36771134976f05c91e.zip | |
sysctl: don't print negative flag for proc_douintvec
I saw some very confusing sysctl output on my system:
# cat /proc/sys/net/core/xfrm_aevent_rseqth
-2
# cat /proc/sys/net/core/xfrm_aevent_etime
-10
# cat /proc/sys/net/ipv4/tcp_notsent_lowat
-4294967295
Because we forget to set the *negp flag in proc_douintvec, so it will
become a garbage value.
Since the value related to proc_douintvec is always an unsigned integer,
so we can set *negp to false explictily to fix this issue.
Fixes: e7d316a02f68 ("sysctl: handle error writing UINT_MAX to u32 fields")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Cc: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | kernel/sysctl.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index acf0a5a06da7..8cca4c7bb21f 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2136,6 +2136,7 @@ static int do_proc_douintvec_conv(bool *negp, unsigned long *lvalp, *valp = *lvalp; } else { unsigned int val = *valp; + *negp = false; *lvalp = (unsigned long)val; } return 0; |