Date:	Wed, 18 Jan 2012 15:33:26 +0100
From:	"Tim Sander" <tim.sander@....com>
To:	"Thomas Gleixner" <tglx@...utronix.de>
Cc:	"LKML" <linux-kernel@...r.kernel.org>,
	"linux-rt-users" <linux-rt-users@...r.kernel.org>,
	"Steven Rostedt" <rostedt@...dmis.org>
Subject: Re: [ANNOUNCE] 3.2-rc6-rt9 - bugsplat

Hi Thomas

I am reporting for 3.2-rt10 (which was not announced, so just replyed to the latest announcement...)

The platform is an arm i.mx35 pcm043 with local modifications.

I just managed to get 3.2-rt10 up and running. It just showed a bugsplat when i tried to reproduce the 
error reported with the 3.0-rt series: "ksoftirq running wild". This segfault occoured probably at the same 
time the ksoftirqd problem started with 3.0-rt.

Best regards
Tim


fpga: try to mmap (normal)
fpga: hbm_mmap_kmem finished
init: avahi-autoip main process (490) terminated with status 1
init: avahi-autoip main process ended, respawning
eth0: Freescale FEC PHY driver [Micrel KS8041] (mii_bus:phy_addr=1:00, irq=-1)
eth0: no IPv6 routers present
FEC: MDIO read timeout
PHY: 1:00 - Link is Up - 100/Full
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c7044000
[00000000] *pgd=87b01831, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1] PREEMPT
Modules linked in: canterm(O) iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables msp(O) ipv6 fpga(O) af_packet i2c_imx netx(O) netx_reset(O) 
systemled(O) dspload(O) fpgaload(O) mxc_nand nand nand_ids nand_ecc
CPU: 0    Tainted: G           O  (3.2.0-rt10-00008-ga71a9ff-dirty #194)
PC is at rt_mutex_slowunlock+0x18/0x8c
LR is at walk_stackframe+0x24/0x40
pc : [<c0235cd8>]    lr : [<c0010d0c>]    psr: 60000013
sp : c7383d90  ip : c7383d30  fp : c7383da4
r10: ffffffff  r9 : 00000000  r8 : c0324504
r7 : c734178c  r6 : 00000003  r5 : 00000000  r4 : c73416e0
r3 : 00000000  r2 : c7383d90  r1 : c7383d60  r0 : c0019234
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 00c5387d  Table: 87044008  DAC: 00000015
Process ifconfig (pid: 597, stack limit = 0xc7382268)
Stack: (0xc7383d90 to 0xc7384000)
3d80:                                     c73416e0 40000013 c7383db4 c7383da8
3da0: c0235d5c c0235ccc c7383ddc c7383db8 c00566cc c0235d58 00000003 c7068800
3dc0: 00000000 c7068b14 c78ca000 00000002 c7383dec c7383de0 c0056728 c005659c
3de0: c7383e1c c7383df0 bf043558 c00566f0 bf0433fc 00000002 00000000 fffffff9
3e00: bf085b94 c78ca000 c7383ed0 00000000 c7383e44 c7383e20 c003f11c bf043408
3e20: ffffffff c78ca000 00000002 00000000 c78da560 c7b5c468 c7383e5c c7383e48
3e40: c003f1b8 c003f0e8 00000000 c7383e58 c7383e74 c7383e60 c01c27f8 c003f1a4
3e60: c78ca000 00000001 c7383e8c c7383e78 c01c4cc8 c01c27c0 c78ca000 00001003
3e80: c7383eac c7383e90 c01c4d3c c01c4ca0 00000000 c7b4b860 00000000 c78ca000
3ea0: c7383f1c c7383eb0 c020d914 c01c4d04 c03406a0 bee59f18 00008914 bee59c38
3ec0: 30687465 00000000 00000000 00000000 00061042 bee59f18 0005543c 00000000
3ee0: 00061042 bee59f18 0005543c 00000000 30687465 0000891c bee59c38 00008914
3f00: 00000003 c000dee4 c7382000 00000000 c7383f34 c7383f20 c020ea08 c020d620
3f20: c748f6c0 00008914 c7383f54 c7383f38 c01b0f64 c020e948 c01b0d5c c7bfe560
3f40: bee59c38 00008914 c7383f7c c7383f58 c0090ea4 c01b0d68 c7383f74 c7383f68
3f60: c7bfe560 bee59c38 00008914 00000003 c7383fa4 c7383f80 c0090f20 c0090c28
3f80: c7383fac 00000000 0005ad94 bee59e3c bee59f26 00000036 00000000 c7383fa8
3fa0: c000dd60 c0090eec 0005ad94 bee59e3c 00000003 00008914 bee59c38 0005ad94
3fc0: 0005ad94 bee59e3c bee59f26 00000036 00055c74 00000000 00000000 00000000
3fe0: 000000f5 bee59c18 0000f224 401ad32c 60000010 00000003 980c8108 542a4c44
Backtrace: 
[<c0235cc0>] (rt_mutex_slowunlock+0x0/0x8c) from [<c0235d5c>] (rt_mutex_unlock+0x10/0x14)
 r5:40000013 r4:c73416e0
[<c0235d4c>] (rt_mutex_unlock+0x0/0x14) from [<c00566cc>] (rcu_read_unlock_special+0x13c/0x154)
[<c0056590>] (rcu_read_unlock_special+0x0/0x154) from [<c0056728>] (__rcu_read_unlock+0x44/0x48)
 r8:00000002 r7:c78ca000 r6:c7068b14 r5:00000000 r4:c7068800
r3:00000003
[<c00566e4>] (__rcu_read_unlock+0x0/0x48) from [<bf043558>] (packet_notifier+0x15c/0x168 [af_packet])
[<bf0433fc>] (packet_notifier+0x0/0x168 [af_packet]) from [<c003f11c>] (notifier_call_chain+0x40/0x70)
[<c003f0dc>] (notifier_call_chain+0x0/0x70) from [<c003f1b8>] (raw_notifier_call_chain+0x20/0x28)
 r8:c7b5c468 r7:c78da560 r6:00000000 r5:00000002 r4:c78ca000
r3:ffffffff
[<c003f198>] (raw_notifier_call_chain+0x0/0x28) from [<c01c27f8>] (call_netdevice_notifiers+0x44/0x58)
[<c01c27b4>] (call_netdevice_notifiers+0x0/0x58) from [<c01c4cc8>] (__dev_notify_flags+0x34/0x64)
 r5:00000001 r4:c78ca000
[<c01c4c94>] (__dev_notify_flags+0x0/0x64) from [<c01c4d3c>] (dev_change_flags+0x44/0x4c)
 r5:00001003 r4:c78ca000
[<c01c4cf8>] (dev_change_flags+0x0/0x4c) from [<c020d914>] (devinet_ioctl+0x300/0x690)
 r6:c78ca000 r5:00000000 r4:c7b4b860 r3:00000000
[<c020d614>] (devinet_ioctl+0x0/0x690) from [<c020ea08>] (inet_ioctl+0xcc/0x104)
[<c020e93c>] (inet_ioctl+0x0/0x104) from [<c01b0f64>] (sock_ioctl+0x208/0x25c)
 r4:00008914 r3:c748f6c0
[<c01b0d5c>] (sock_ioctl+0x0/0x25c) from [<c0090ea4>] (do_vfs_ioctl+0x288/0x2c4)
 r6:00008914 r5:bee59c38 r4:c7bfe560 r3:c01b0d5c
[<c0090c1c>] (do_vfs_ioctl+0x0/0x2c4) from [<c0090f20>] (sys_ioctl+0x40/0x64)
 r7:00000003 r6:00008914 r5:bee59c38 r4:c7bfe560
[<c0090ee0>] (sys_ioctl+0x0/0x64) from [<c000dd60>] (ret_fast_syscall+0x0/0x30)
 r7:00000036 r6:bee59f26 r5:bee59e3c r4:0005ad94
Code: e24cb004 e1a05000 e3a00001 ebf78d20 (e5953000) 
Segmentation fault

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