korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-23 20:24:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

x25: Fix broken locking in ioctl error paths.

Browse Source 
Two of the x25 ioctl cases have error paths that break out of the function without
unlocking the socket, leading to this warning:

================================================
[ BUG: lock held when returning to user space! ]
3.10.0-rc7+ #36 Not tainted
------------------------------------------------
trinity-child2/31407 is leaving the kernel with locks still held!
1 lock held by trinity-child2/31407:
 #0:  (sk_lock-AF_X25){+.+.+.}, at: [<ffffffffa024b6da>] x25_ioctl+0x8a/0x740 [x25]

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dave Jones 2013-06-28 12:13:52 -04:00 committed by David S. Miller
parent aec0a40a6f
commit 4ccb93ce74
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
net/x25/af_x25.c
View File

@ -1583,11 +1583,11 @@ out_cud_release:
case SIOCX25CALLACCPTAPPRV: {
rc = -EINVAL;
lock_sock(sk);
if (sk->sk_state != TCP_CLOSE)
break;
clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags);
if (sk->sk_state == TCP_CLOSE) {
clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags);
rc = 0;
}
release_sock(sk);
rc = 0;
break;
}
@ -1595,14 +1595,15 @@ out_cud_release:
rc = -EINVAL;
lock_sock(sk);
if (sk->sk_state != TCP_ESTABLISHED)
break;
goto out_sendcallaccpt_release;
/* must call accptapprv above */
if (test_bit(X25_ACCPT_APPRV_FLAG, &x25->flags))
break;
goto out_sendcallaccpt_release;
x25_write_internal(sk, X25_CALL_ACCEPTED);
x25->state = X25_STATE_3;
release_sock(sk);
rc = 0;
out_sendcallaccpt_release:
release_sock(sk);
break;
}