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authorMyungho Jung <mhjungk@gmail.com>2018-12-18 09:02:25 -0800
committerDavid S. Miller <davem@davemloft.net>2018-12-18 22:02:51 -0800
commit78abe3d0dfad196959b1246003366e2610775ea6 (patch)
tree101f58d43375ea186240109dbb123854a006dade /net/smc/smc.h
parentf7db2beb4c2c6cc8111f5ab90fc7363ca91107b6 (diff)
downloadlinux-78abe3d0dfad196959b1246003366e2610775ea6.tar.bz2
net/smc: fix TCP fallback socket release
clcsock can be released while kernel_accept() references it in TCP listen worker. Also, clcsock needs to wake up before released if TCP fallback is used and the clcsock is blocked by accept. Add a lock to safely release clcsock and call kernel_sock_shutdown() to wake up clcsock from accept in smc_release(). Reported-by: syzbot+0bf2e01269f1274b4b03@syzkaller.appspotmail.com Reported-by: syzbot+e3132895630f957306bc@syzkaller.appspotmail.com Signed-off-by: Myungho Jung <mhjungk@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc.h')
-rw-r--r--net/smc/smc.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/smc/smc.h b/net/smc/smc.h
index 08786ace6010..5721416d0605 100644
--- a/net/smc/smc.h
+++ b/net/smc/smc.h
@@ -219,6 +219,10 @@ struct smc_sock { /* smc sock container */
* started, waiting for unsent
* data to be sent
*/
+ struct mutex clcsock_release_lock;
+ /* protects clcsock of a listen
+ * socket
+ * */
};
static inline struct smc_sock *smc_sk(const struct sock *sk)