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author | Wang Chen <wangchen@cn.fujitsu.com> | 2008-06-18 01:48:28 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2008-06-18 01:48:28 -0700 |
commit | dad9b335c6940de2746a9788eb456d09cf102f81 (patch) | |
tree | c74092de70d7c2c9ba88bf580bc404133b55c490 /net/unix/af_unix.c | |
parent | dd574dbfcc9e74e7dd8fd59ae0075d23e71a3da1 (diff) |
netdevice: Fix promiscuity and allmulti overflow
Max of promiscuity and allmulti plus positive @inc can cause overflow.
Fox example: when allmulti=0xFFFFFFFF, any caller give dev_set_allmulti() a
positive @inc will cause allmulti be off.
This is not what we want, though it's rare case.
The fix is that only negative @inc will cause allmulti or promiscuity be off
and when any caller makes the counters touch the roof, we return error.
Change of v2:
Change void function dev_set_promiscuity/allmulti to return int.
So callers can get the overflow error.
Caller's fix will be done later.
Change of v3:
1. Since we return error to caller, we don't need to print KERN_ERROR,
KERN_WARNING is enough.
2. In dev_set_promiscuity(), if __dev_set_promiscuity() failed, we
return at once.
Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions