diff options
| author | Karsten Graul <kgraul@linux.ibm.com> | 2020-09-15 22:57:09 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-16 17:30:16 -0700 |
| commit | ddcc9b7feb451c5c8145d11879a6585a4ddd317d (patch) | |
| tree | c54b68fed6a535142fecd440b1abd72478ffe8db /net/smc | |
| parent | d5bf31ddd8b21d2aa0af2500ff4fcda068ad50c7 (diff) | |
net/smc: check variable before dereferencing in smc_close.c
smc->clcsock and smc->clcsock->sk are used before the check if they can
be dereferenced. Fix this by checking the variables first.
Fixes: a60a2b1e0af1 ("net/smc: reduce active tcp_listen workers")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc')
| -rw-r--r-- | net/smc/smc_close.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c index 10d05a6d34fc..0f9ffba07d26 100644 --- a/net/smc/smc_close.c +++ b/net/smc/smc_close.c @@ -208,11 +208,12 @@ again: break; case SMC_LISTEN: sk->sk_state = SMC_CLOSED; - smc->clcsock->sk->sk_data_ready = smc->clcsk_data_ready; - smc->clcsock->sk->sk_user_data = NULL; sk->sk_state_change(sk); /* wake up accept */ - if (smc->clcsock && smc->clcsock->sk) + if (smc->clcsock && smc->clcsock->sk) { + smc->clcsock->sk->sk_data_ready = smc->clcsk_data_ready; + smc->clcsock->sk->sk_user_data = NULL; rc = kernel_sock_shutdown(smc->clcsock, SHUT_RDWR); + } smc_close_cleanup_listen(sk); release_sock(sk); flush_work(&smc->tcp_listen_work); |