Fwd: 2.6.19-1.2891.fc7 -- INFO: soft-safe -> soft-unsafe lock order detected
Miles Lane
miles.lane at gmail.com
Fri Dec 29 16:18:39 UTC 2006
Since I have received no reply on the development testers list, I'll try here.
---------- Forwarded message ----------
From: Miles Lane <miles.lane at gmail.com>
Date: Dec 29, 2006 1:17 AM
Subject: 2.6.19-1.2891.fc7 -- INFO: soft-safe -> soft-unsafe lock order detected
To: For testers of Fedora Core development releases
<fedora-test-list at redhat.com>
[ INFO: soft-safe -> soft-unsafe lock order detected ]
2.6.19-1.2891.fc7 #1
------------------------------------------------------
cupsd/1884 [HC0[0]:SC0[1]:HE1:SE0] is trying to acquire:
(&ssec->nlbl_lock){--..}, at: [<c04cec37>]
selinux_netlbl_socket_setsid+0xbb/0x123
and this task is already holding:
(af_callback_keys + sk->sk_family#3){-.-+}, at: [<c05daa1c>]
inet_accept+0x70/0xb5
which would create a new lock dependency:
(af_callback_keys + sk->sk_family#3){-.-+} -> (&ssec->nlbl_lock){--..}
but this new dependency connects a soft-irq-safe lock:
(af_callback_keys + sk->sk_family#3){-.-+}
... which became soft-irq-safe at:
[<c043fff1>] __lock_acquire+0x37d/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbdb6>] _read_lock_bh+0x30/0x3d
[<c04c687e>] selinux_socket_sock_rcv_skb+0xbd/0x252
[<c05d0645>] tcp_v4_rcv+0x37a/0x909
[<c05b7593>] ip_local_deliver+0x185/0x22e
[<c05b73d6>] ip_rcv+0x418/0x450
[<c059ae9c>] netif_receive_skb+0x2db/0x35a
[<c059c85f>] process_backlog+0x95/0xf6
[<c059ca46>] net_rx_action+0xa1/0x1a8
[<c042bf5a>] __do_softirq+0x6f/0xe2
[<c04063a1>] do_softirq+0x61/0xc7
[<ffffffff>] 0xffffffff
to a soft-irq-unsafe lock:
(&ssec->nlbl_lock){--..}
... which became soft-irq-unsafe at:
... [<c044007d>] __lock_acquire+0x409/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbc89>] _spin_lock+0x2b/0x38
[<c04cec37>] selinux_netlbl_socket_setsid+0xbb/0x123
[<c04d0c92>] selinux_netlbl_socket_post_create+0x2d/0x2f
[<c04c807b>] selinux_socket_post_create+0x156/0x15c
[<c059213c>] __sock_create+0x179/0x1b2
[<c05921ae>] sock_create+0x1a/0x1f
[<c0592435>] sys_socket+0x1b/0x3c
[<c0592cba>] sys_socketcall+0x77/0x241
[<c0404050>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
other info that might help us debug this:
3 locks held by cupsd/1884:
#0: (sk_lock-AF_INET){--..}, at: [<c05da9dd>] inet_accept+0x31/0xb5
#1: (af_callback_keys + sk->sk_family#3){-.-+}, at: [<c05daa1c>]
inet_accept+0x70/0xb5
#2: (policy_rwlock){..-?}, at: [<c04cebd0>]
selinux_netlbl_socket_setsid+0x54/0x123
the soft-irq-safe lock's dependencies:
-> (af_callback_keys + sk->sk_family#3){-.-+} ops: 0 {
initial-use at:
[<c0440098>] __lock_acquire+0x424/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbd3b>] _write_lock_bh+0x30/0x3d
[<c05c1871>] tcp_close+0x24b/0x52b
[<c05da570>] inet_release+0x43/0x49
[<c0591f72>] sock_release+0x17/0x68
[<c05921e0>] sock_close+0x2d/0x33
[<c047959b>] __fput+0xbe/0x168
[<c047965c>] fput+0x17/0x19
[<c0476f5d>] filp_close+0x54/0x5c
[<c0477ee1>] sys_close+0x78/0xb0
[<c0404050>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
hardirq-on-W at:
[<c0440056>] __lock_acquire+0x3e2/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbd3b>] _write_lock_bh+0x30/0x3d
[<c05c1871>] tcp_close+0x24b/0x52b
[<c05da570>] inet_release+0x43/0x49
[<c0591f72>] sock_release+0x17/0x68
[<c05921e0>] sock_close+0x2d/0x33
[<c047959b>] __fput+0xbe/0x168
[<c047965c>] fput+0x17/0x19
[<c0476f5d>] filp_close+0x54/0x5c
[<c0477ee1>] sys_close+0x78/0xb0
[<c0404050>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
in-softirq-R at:
[<c043fff1>] __lock_acquire+0x37d/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbdb6>] _read_lock_bh+0x30/0x3d
[<c04c687e>] selinux_socket_sock_rcv_skb+0xbd/0x252
[<c05d0645>] tcp_v4_rcv+0x37a/0x909
[<c05b7593>] ip_local_deliver+0x185/0x22e
[<c05b73d6>] ip_rcv+0x418/0x450
[<c059ae9c>] netif_receive_skb+0x2db/0x35a
[<c059c85f>] process_backlog+0x95/0xf6
[<c059ca46>] net_rx_action+0xa1/0x1a8
[<c042bf5a>] __do_softirq+0x6f/0xe2
[<c04063a1>] do_softirq+0x61/0xc7
[<ffffffff>] 0xffffffff
hardirq-on-R at:
[<c044001f>] __lock_acquire+0x3ab/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbdb6>] _read_lock_bh+0x30/0x3d
[<c04c687e>] selinux_socket_sock_rcv_skb+0xbd/0x252
[<c05d0645>] tcp_v4_rcv+0x37a/0x909
[<c05b7593>] ip_local_deliver+0x185/0x22e
[<c05b73d6>] ip_rcv+0x418/0x450
[<c059ae9c>] netif_receive_skb+0x2db/0x35a
[<c059c85f>] process_backlog+0x95/0xf6
[<c059ca46>] net_rx_action+0xa1/0x1a8
[<c042bf5a>] __do_softirq+0x6f/0xe2
[<c04063a1>] do_softirq+0x61/0xc7
[<ffffffff>] 0xffffffff
}
... key at: [<c09f6770>] af_callback_keys+0x10/0x100
the soft-irq-unsafe lock's dependencies:
-> (&ssec->nlbl_lock){--..} ops: 0 {
initial-use at:
[<c0440098>] __lock_acquire+0x424/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbc89>] _spin_lock+0x2b/0x38
[<c04cec37>] selinux_netlbl_socket_setsid+0xbb/0x123
[<c04d0c92>] selinux_netlbl_socket_post_create+0x2d/0x2f
[<c04c807b>] selinux_socket_post_create+0x156/0x15c
[<c059213c>] __sock_create+0x179/0x1b2
[<c05921ae>] sock_create+0x1a/0x1f
[<c0592435>] sys_socket+0x1b/0x3c
[<c0592cba>] sys_socketcall+0x77/0x241
[<c0404050>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
softirq-on-W at:
[<c044007d>] __lock_acquire+0x409/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbc89>] _spin_lock+0x2b/0x38
[<c04cec37>] selinux_netlbl_socket_setsid+0xbb/0x123
[<c04d0c92>] selinux_netlbl_socket_post_create+0x2d/0x2f
[<c04c807b>] selinux_socket_post_create+0x156/0x15c
[<c059213c>] __sock_create+0x179/0x1b2
[<c05921ae>] sock_create+0x1a/0x1f
[<c0592435>] sys_socket+0x1b/0x3c
[<c0592cba>] sys_socketcall+0x77/0x241
[<c0404050>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
hardirq-on-W at:
[<c0440056>] __lock_acquire+0x3e2/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbc89>] _spin_lock+0x2b/0x38
[<c04cec37>] selinux_netlbl_socket_setsid+0xbb/0x123
[<c04d0c92>] selinux_netlbl_socket_post_create+0x2d/0x2f
[<c04c807b>] selinux_socket_post_create+0x156/0x15c
[<c059213c>] __sock_create+0x179/0x1b2
[<c05921ae>] sock_create+0x1a/0x1f
[<c0592435>] sys_socket+0x1b/0x3c
[<c0592cba>] sys_socketcall+0x77/0x241
[<c0404050>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
}
... key at: [<c09ebb20>] __key.27522+0x0/0x8
stack backtrace:
[<c04051c1>] show_trace_log_lvl+0x1a/0x2f
[<c0405766>] show_trace+0x12/0x14
[<c04057ea>] dump_stack+0x16/0x18
[<c043fbe0>] check_usage+0x242/0x24c
[<c04404f3>] __lock_acquire+0x87f/0x9f8
[<c044094d>] lock_acquire+0x56/0x6f
[<c05fbc89>] _spin_lock+0x2b/0x38
[<c04cec37>] selinux_netlbl_socket_setsid+0xbb/0x123
[<c04d0f40>] selinux_netlbl_sock_graft+0xc7/0xcf
[<c04c4b74>] selinux_sock_graft+0x32/0x36
[<c05daa3b>] inet_accept+0x8f/0xb5
[<c0592b93>] sys_accept+0xd0/0x180
[<c0592d13>] sys_socketcall+0xd0/0x241
[<c0404050>] syscall_call+0x7/0xb
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