| Message ID | 20211125061932.74874-2-tonylu@linux.alibaba.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Fixes for clcsock shutdown behaviors | expand |
On 25/11/2021 07:19, Tony Lu wrote: > When smc_close_final() returns error, the return code overwrites by > kernel_sock_shutdown() in smc_close_active(). The return code of > smc_close_final() is more important than kernel_sock_shutdown(), and it > will pass to userspace directly. > > Fix it by keeping both return codes, if smc_close_final() raises an > error, return it or kernel_sock_shutdown()'s. > > Link: https://lore.kernel.org/linux-s390/1f67548e-cbf6-0dce-82b5-10288a4583bd@linux.ibm.com/ > Fixes: 606a63c9783a ("net/smc: Ensure the active closing peer first closes clcsock") > Suggested-by: Karsten Graul <kgraul@linux.ibm.com> > Signed-off-by: Tony Lu <tonylu@linux.alibaba.com> > Reviewed-by: Wen Gu <guwen@linux.alibaba.com> > --- Acked-by: Karsten Graul <kgraul@linux.ibm.com>
diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c index 3715d2f5ad55..292e4d904ab6 100644 --- a/net/smc/smc_close.c +++ b/net/smc/smc_close.c @@ -195,6 +195,7 @@ int smc_close_active(struct smc_sock *smc) int old_state; long timeout; int rc = 0; + int rc1 = 0; timeout = current->flags & PF_EXITING ? 0 : sock_flag(sk, SOCK_LINGER) ? @@ -232,8 +233,11 @@ int smc_close_active(struct smc_sock *smc) /* actively shutdown clcsock before peer close it, * prevent peer from entering TIME_WAIT state. */ - if (smc->clcsock && smc->clcsock->sk) - rc = kernel_sock_shutdown(smc->clcsock, SHUT_RDWR); + if (smc->clcsock && smc->clcsock->sk) { + rc1 = kernel_sock_shutdown(smc->clcsock, + SHUT_RDWR); + rc = rc ? rc : rc1; + } } else { /* peer event has changed the state */ goto again;
When smc_close_final() returns error, the return code overwrites by kernel_sock_shutdown() in smc_close_active(). The return code of smc_close_final() is more important than kernel_sock_shutdown(), and it will pass to userspace directly. Fix it by keeping both return codes, if smc_close_final() raises an error, return it or kernel_sock_shutdown()'s. Link: https://lore.kernel.org/linux-s390/1f67548e-cbf6-0dce-82b5-10288a4583bd@linux.ibm.com/ Fixes: 606a63c9783a ("net/smc: Ensure the active closing peer first closes clcsock") Suggested-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Tony Lu <tonylu@linux.alibaba.com> Reviewed-by: Wen Gu <guwen@linux.alibaba.com> --- net/smc/smc_close.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)