To: LKML <linux-kernel@vger.kernel.org>
From: =?UTF-8?Q?Mika_Penttil=c3=a4?= <mika.penttila@nextfour.com>
Subject: [BUG] 4.5-rc7 af unix related
CC: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Message-ID: <56DFD2C3.1020709@nextfour.com>
Date: Wed, 9 Mar 2016 09:37:39 +0200
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Have got some of these same looking crashes after 4.4 (maybe before also, not sure). Very random, not easy to reproduce.

--Mika


[ 1999.948171] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 1999.955740] pgd = a8ba4000
[ 1999.958264] [00000000] *pgd=38ca7831, *pte=00000000, *ppte=00000000
[ 1999.964118] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
[ 1999.969600] Modules linked in: btwilink radio_quantek st_drv
[ 1999.974895] CPU: 0 PID: 335 Comm: compositor Not tainted 4.5.0-rc7 #26
[ 1999.980939] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 1999.986983] task: a8da8fc0 ti: a8ce8000 task.ti: a8ce8000
[ 1999.991983] PC is at 0x0
[ 1999.994343] LR is at __wake_up_common+0x4c/0x80
[ 1999.998540] pc : [<00000000>]    lr : [<80058934>]    psr: 800e00b3
[ 1999.998540] sp : a8ce9d98  ip : a8a31d28  fp : 00000001
[ 2000.009164] r10: 00000001  r9 : 00000001  r8 : 000000c3
[ 2000.014002] r7 : 9c641944  r6 : 00000001  r5 : 00000001  r4 : 80150007
[ 2000.020044] r3 : 000000c3  r2 : 00000001  r1 : 00000001  r0 : a8a31d28
[ 2000.026088] Flags: Nzcv  IRQs off  FIQs on  Mode SVC_32  ISA Thumb  Segment user
[ 2000.032934] Control: 10c5387d  Table: 38ba404a  DAC: 00000055
[ 2000.038254] Process compositor (pid: 335, stack limit = 0xa8ce8210)
[ 2000.044056] Stack: (0xa8ce9d98 to 0xa8cea000)
[ 2000.048091] 9d80:                                                       00000001 9c641940
[ 2000.055663] 9da0: 00000001 000000c3 00000001 a00e0013 00000120 a9d9fc80 a9d9fbcc 80058f1c
[ 2000.063236] 9dc0: 000000c3 806f3630 a9d9f9c0 00000000 a9d9f9c0 a8a8e480 00000001 8052a4fc
[ 2000.070808] 9de0: 00000120 805d3a6c a8ce9e08 00000003 7eba18e0 00000120 a6047680 00000001
[ 2000.078380] 9e00: a8ce9f74 a8ce9f6c 00000000 00000000 00000000 00000000 ffffffff ffffffff
[ 2000.085952] 9e20: a8ce9e54 a8ce9f6c 00004040 00000000 a6047680 00000000 a8ce9e58 00000000
[ 2000.093524] 9e40: 00000000 8052724c a8ce9f6c 80527bd0 a8ce9eb4 00000000 a80cd400 0000587c
[ 2000.101095] 9e60: 806f6b90 80282e2c a80cd400 00000001 a80cd808 800e0193 00b8879c 00000120
[ 2000.108668] 9e80: a80cd400 80044708 80b85704 80b85704 0097c6d4 a84d1d5c 80059020 00000000
[ 2000.116240] 9ea0: a81c3e2c 00000000 00000000 00000003 00000001 8005902c a81c3e20 80058934
[ 2000.123811] 9ec0: 00000000 a81c3e28 600e0193 00000000 00000003 00000001 a816ecc0 00000000
[ 2000.131383] 9ee0: 00000001 80b7e450 0002d6c8 802f67a4 a81c3c10 bb9c838b 00000000 00000001
[ 2000.138955] 9f00: 00000001 00000000 00000125 a816ecc0 00000001 600e0013 a8ce9f2c 800458f4
[ 2000.146527] 9f20: 9c750c00 80102fbc a8ce9f68 a8ce9f64 00004040 00000128 8000f7e4 a6047680
[ 2000.154099] 9f40: 7eba18f0 00004040 00000128 8000f7e4 a8ce8000 8052882c 00000000 00b8f1a0
[ 2000.161670] 9f60: 00000107 00000001 fffffff7 00000000 00000000 00000001 00000000 00000000
[ 2000.169241] 9f80: a8ce9e80 00000000 00000000 00000000 00004040 00000000 00000001 00b8a040
[ 2000.176813] 9fa0: 00b88030 8000f640 00000001 00b8a040 00000024 7eba18f0 00004040 00000000
[ 2000.184384] 9fc0: 00000001 00b8a040 00b88030 00000128 00b8b028 0002876c 7eba18f0 00000000
[ 2000.191956] 9fe0: 00000000 7eba18d8 76faa4c0 75c0e8f8 800e0010 00000024 3bf59811 3bf59c11
[ 2000.199541] [<80058934>] (__wake_up_common) from [<80058f1c>] (__wake_up_sync_key+0x44/0x6                0)
[ 2000.207363] [<80058f1c>] (__wake_up_sync_key) from [<8052a4fc>] (sock_def_readable+0x3c/0x                6c)
[ 2000.215267] [<8052a4fc>] (sock_def_readable) from [<805d3a6c>] (unix_stream_sendmsg+0x154/                0x340)
[ 2000.223414] [<805d3a6c>] (unix_stream_sendmsg) from [<8052724c>] (sock_sendmsg+0x14/0x24)
[ 2000.230989] [<8052724c>] (sock_sendmsg) from [<80527bd0>] (___sys_sendmsg+0x1d0/0x1d8)
[ 2000.238321] [<80527bd0>] (___sys_sendmsg) from [<8052882c>] (__sys_sendmsg+0x3c/0x6c)
[ 2000.245579] [<8052882c>] (__sys_sendmsg) from [<8000f640>] (ret_fast_syscall+0x0/0x34)
[ 2000.252911] Code: bad PC value
[ 2000.255744] ---[ end trace a385e81f19607805 ]---