diff options
| author | D. Wythe <alibuda@linux.alibaba.com> | 2023-11-03 09:07:38 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-11-06 13:01:07 +0300 |
| commit | 5211c9729484c923f8d2e06bd29f9322cc42bb8f (patch) | |
| tree | 4b7ec90ea3cbc136dcb5253670e487b5cdac7cc9 /net/smc/smc.h | |
| parent | d93f9528573e1d419b69ca5ff4130201d05f6b90 (diff) | |
| download | linux-5211c9729484c923f8d2e06bd29f9322cc42bb8f.tar.xz | |
net/smc: fix dangling sock under state SMC_APPFINCLOSEWAIT
Considering scenario:
smc_cdc_rx_handler
__smc_release
sock_set_flag
smc_close_active()
sock_set_flag
__set_bit(DEAD) __set_bit(DONE)
Dues to __set_bit is not atomic, the DEAD or DONE might be lost.
if the DEAD flag lost, the state SMC_CLOSED will be never be reached
in smc_close_passive_work:
if (sock_flag(sk, SOCK_DEAD) &&
smc_close_sent_any_close(conn)) {
sk->sk_state = SMC_CLOSED;
} else {
/* just shutdown, but not yet closed locally */
sk->sk_state = SMC_APPFINCLOSEWAIT;
}
Replace sock_set_flags or __set_bit to set_bit will fix this problem.
Since set_bit is atomic.
Fixes: b38d732477e4 ("smc: socket closing and linkgroup cleanup")
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc.h')
| -rw-r--r-- | net/smc/smc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/smc/smc.h b/net/smc/smc.h index 24745fde4ac2..e377980b8414 100644 --- a/net/smc/smc.h +++ b/net/smc/smc.h @@ -377,4 +377,9 @@ int smc_nl_dump_hs_limitation(struct sk_buff *skb, struct netlink_callback *cb); int smc_nl_enable_hs_limitation(struct sk_buff *skb, struct genl_info *info); int smc_nl_disable_hs_limitation(struct sk_buff *skb, struct genl_info *info); +static inline void smc_sock_set_flag(struct sock *sk, enum sock_flags flag) +{ + set_bit(flag, &sk->sk_flags); +} + #endif /* __SMC_H */ |