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sysctl: don't print negative flag for proc_douintvec

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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: e7d316a02f ("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>
This commit is contained in:
Liping Zhang 2017-04-07 23:51:06 +08:00 committed by Linus Torvalds
parent 1680a3868f
commit 5380e5644a
1 changed files with 1 additions and 0 deletions
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kernel/sysctl.c
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@ -2136,6 +2136,7 @@ static int do_proc_douintvec_conv(bool *negp, unsigned long *lvalp,
*valp = *lvalp; *valp = *lvalp;
} else { } else {
unsigned int val = *valp; unsigned int val = *valp;
*negp = false;
*lvalp = (unsigned long)val; *lvalp = (unsigned long)val;
} }
return 0; return 0;