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| author | Eric Dumazet <edumazet@google.com> | 2017-02-01 08:33:53 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-18 07:55:43 +0200 |
| commit | 457432f3797c752399549a1228684620f70fc08d (patch) | |
| tree | 79ff7115d2da34a793d35666ef4e64fbc4cd7208 /net/core/dev.c | |
| parent | a5042c997aa4b4d20f14a5e66c73537d59a9277e (diff) | |
tcp: fix 0 divide in __tcp_select_window()
[ Upstream commit 06425c308b92eaf60767bc71d359f4cbc7a561f8 ]
syszkaller fuzzer was able to trigger a divide by zero, when
TCP window scaling is not enabled.
SO_RCVBUF can be used not only to increase sk_rcvbuf, also
to decrease it below current receive buffers utilization.
If mss is negative or 0, just return a zero TCP window.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/core/dev.c')
0 files changed, 0 insertions, 0 deletions