diff options
| author | Cambda Zhu <cambda@linux.alibaba.com> | 2023-05-27 12:03:17 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-05-29 22:03:48 -0700 |
| commit | 34dfde4ad87b84d21278a7e19d92b5b2c68e6c4d (patch) | |
| tree | 6060c0b9d42fe2feca0b59235ccb92f4740d7050 /net/rxrpc/af_rxrpc.c | |
| parent | 4faeee0cf8a5d88d63cdbc3bab124fb0e6aed08c (diff) | |
tcp: Return user_mss for TCP_MAXSEG in CLOSE/LISTEN state if user_mss set
This patch replaces the tp->mss_cache check in getting TCP_MAXSEG
with tp->rx_opt.user_mss check for CLOSE/LISTEN sock. Since
tp->mss_cache is initialized with TCP_MSS_DEFAULT, checking if
it's zero is probably a bug.
With this change, getting TCP_MAXSEG before connecting will return
default MSS normally, and return user_mss if user_mss is set.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Jack Yang <mingliang@linux.alibaba.com>
Suggested-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/netdev/CANn89i+3kL9pYtkxkwxwNMzvC_w3LNUum_2=3u+UyLBmGmifHA@mail.gmail.com/#t
Signed-off-by: Cambda Zhu <cambda@linux.alibaba.com>
Link: https://lore.kernel.org/netdev/14D45862-36EA-4076-974C-EA67513C92F6@linux.alibaba.com/
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230527040317.68247-1-cambda@linux.alibaba.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/rxrpc/af_rxrpc.c')
0 files changed, 0 insertions, 0 deletions