From: Ben Greear <greearb@candelatech.com>
To: netdev <netdev@vger.kernel.org>
Subject: Kernel crash in 3.7.5+
Date: Tue, 29 Jan 2013 12:52:56 -0800 [thread overview]
Message-ID: <510836A8.2070205@candelatech.com> (raw)
I've been seeing rtnl v/s rcu deadlocks in my hacked 3.7.4+ kernel,
so, I updated to 3.7.5 and applied a single patch to that to allow
over-riding the regulatory domain in ath9k (test case won't work without
being able to create AP in 5Ghz range..which needs the regulatory hack).
I saw several warnings similar to this, though I think this is a known
problem:
[ 89.668284] ------------[ cut here ]------------
[ 89.678807] WARNING: at /home/greearb/git/linux-3.7.dev.y/net/mac80211/agg-t)
[ 89.701156] Hardware name: To Be Filled By O.E.M.
[ 89.711078] Modules linked in: xt_CT iptable_raw nf_conntrack_ipv4 nf_defrag5
[ 89.754335] Call Trace:
[ 89.754356] [<c04440dd>] warn_slowpath_common+0x6d/0xa0
[ 89.754374] [<f8b72aab>] ? ieee80211_start_tx_ba_cb+0xcb/0xd0 [mac80211]
[ 89.754405] [<f8b72aab>] ? ieee80211_start_tx_ba_cb+0xcb/0xd0 [mac80211]
[ 89.754431] [<c044412d>] warn_slowpath_null+0x1d/0x20
[ 89.754441] [<f8b72aab>] ieee80211_start_tx_ba_cb+0xcb/0xd0 [mac80211]
[ 89.754469] [<f8b7621f>] ieee80211_iface_work+0x1ff/0x300 [mac80211]
[ 89.754496] [<c0459327>] process_one_work+0x127/0x2f0
[ 89.754507] [<f8b76020>] ? ieee80211_netdev_select_queue+0x10/0x10 [mac8021]
[ 89.754533] [<c045bea2>] worker_thread+0x102/0x380
[ 89.754541] [<c045fedc>] kthread+0x9c/0xa0
[ 89.754549] [<c045bda0>] ? manage_workers+0x2b0/0x2b0
[ 89.754555] [<c0460000>] ? kthread_stop+0x10/0x70
[ 89.754563] [<c0917177>] ret_from_kernel_thread+0x1b/0x28
[ 89.754571] [<c045fe40>] ? kthread_freezable_should_stop+0x50/0x50
[ 89.754582] ---[ end trace 055168695121df42 ]---
[ 89.754753] ------------[ cut here ]------------
And then, it crashed hard. Will be re-compiling with debugging symbols
next I suppose...
[ 115.621178] sta3: send auth to 00:ab:87:60:10:10 (try 1/3)
[ 116.033669] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 116.034529] IP: [<c0458df9>] cwq_dec_nr_in_flight+0x69/0x130
[ 116.034529] *pdpt = 0000000000000000 *pde = f000eef3f000eef3
[ 116.034529] Oops: 0000 [#1] PREEMPT SMP
[ 116.034529] Modules linked in: xt_CT iptable_raw nf_conntrack_ipv4 nf_defrag]
[ 116.034529] Pid: 48, comm: kworker/u:2 Tainted: G WC 3.7.5+ #35 To .
[ 116.034529] EIP: 0060:[<c0458df9>] EFLAGS: 00010086 CPU: 0
[ 116.034529] EIP is at cwq_dec_nr_in_flight+0x69/0x130
[ 116.034529] EAX: f55efe00 EBX: 00000000 ECX: f1799880 EDX: f1799884
[ 116.034529] ESI: f5469f00 EDI: c0c4b500 EBP: f5495eec ESP: f5495ec8
[ 116.034529] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 116.034529] CR0: 8005003b CR2: 00000000 CR3: 00bfb000 CR4: 000007e0
[ 116.034529] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 116.034529] DR6: ffff0ff0 DR7: 00000400
[ 116.034529] Process kworker/u:2 (pid: 48, ti=f5494000 task=f543a5b0 task.ti=)
[ 116.034529] Stack:
[ 116.034529] f53b38d0 00000000 00000008 00000004 f5168340 f1799884 f179d7bc 0
[ 116.034529] c0c4b500 f5495f2c c045938b c0b26a88 00000000 c0c4b60c c0c4b614 c
[ 116.034529] c0c4b500 f8b76020 c0c4b60c f55efe00 00000000 f55efe45 f5469f00 c
[ 116.034529] Call Trace:
[ 116.034529] [<c045938b>] process_one_work+0x18b/0x2f0
[ 116.034529] [<f8b76020>] ? ieee80211_netdev_select_queue+0x10/0x10 [mac8021]
[ 116.034529] [<c045bea2>] worker_thread+0x102/0x380
[ 116.034529] [<c045fedc>] kthread+0x9c/0xa0
[ 116.034529] [<c045bda0>] ? manage_workers+0x2b0/0x2b0
[ 116.034529] [<c0460000>] ? kthread_stop+0x10/0x70
[ 116.034529] [<c0917177>] ret_from_kernel_thread+0x1b/0x28
[ 116.034529] [<c045fe40>] ? kthread_freezable_should_stop+0x50/0x50
[ 116.034529] Code: 8d a4 00 00 00 8b 5d f0 8b 4d f0 8b 53 fc 83 e9 04 c7 45 ea
[ 116.034529] EIP: [<c0458df9>] cwq_dec_nr_in_flight+0x69/0x130 SS:ESP 0068:f58
[ 116.034529] CR2: 0000000000000000
[ 116.034529] ---[ end trace 055168695121df49 ]---
[ 116.034529] note: kworker/u:2[48] exited with preempt_count 1
[ 116.684353] Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu0
[ 116.684353] Shutting down cpus with NMI
[ 116.684353] panic occurred, switching back to text console
[ 116.684353] Rebooting in 10 seconds..
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
reply other threads:[~2013-01-29 20:52 UTC|newest]
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