LSK: panda: Oops - undefined instruction: __might_sleep

[Naresh Kamboju]

This bug found on linux-stable kernel on panda board.

Target board: Panda board
Linux kernel version: 3.10.37
kernel git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-3.10.y
Kernel config attached to this bug.

[ 5.695892] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 5.695892] VFS: Mounted root (ext4 filesystem) on device 179:2.
[ 5.715972] devtmpfs: mounted
[ 5.719573] Freeing unused kernel memory: 440K (c07be000 - c082c000)
[ 8.580871] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 8.585388] Internal error: Oops - undefined instruction: 0 [#1] SMP THUMB2
[ 8.585388] Modules linked in:
[ 8.586181] CPU: 0 PID: 871 Comm: swapon Not tainted 3.10.37 #133
[ 8.586181] task: edaee040 ti: edfc6000 task.ti: edfc6000
[ 8.586212] PC is at __might_sleep+0x0/0x1bc
[ 8.586212] LR is at down_read+0x1f/0x44
[ 8.586212] pc : [<c0057e64>] lr : [<c0519377>] psr: 40000033
[ 8.586212] sp : edfc7d60 ip : edfc6010 fp : 00000000
[ 8.586212] r10: 00000000 r9 : 00000000 r8 : 00000000
[ 8.586242] r7 : ed2fdaa0 r6 : edfc7de0 r5 : c0159135 r4 : ed2fda60
[ 8.586242] r3 : 00000000 r2 : 00000000 r1 : 00000014 r0 : c06c3630
[ 8.586242] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA Thumb Segment user
[ 8.586242] Control: 50c5387d Table: ac80804a DAC: 00000015
[ 8.586242] Process swapon (pid: 871, stack limit = 0xedfc6240)
[ 8.586273] Stack: (0xedfc7d60 to 0xedfc8000)
[ 8.586273] 7d60: 00000000 00000000 00011ad7 edfc7de0 ed2fdaa0 00000000 00011ad7 c0159135
[ 8.586273] 7d80: 00000001 00000000 00000000 80000000 c0091c93 edfc6000 80000193 c0077009
[ 8.586273] 7da0: 00000002 00000000 00000000 c0091c93 00000000 00000000 00000001 00000000
[ 8.586303] 7dc0: 00011ad7 edfc7e28 ed2fdaa0 00000000 ed2fdaa0 00000000 00000000 c015926f
[ 8.586303] 7de0: 000162d7 00000000 00011ad7 00000001 00000000 00000000 00000006 00000000
[ 8.586303] 7e00: 00000000 edfc7e28 00000400 edfc12c0 ed2fdaa0 000162d4 00000000 c010b66d
[ 8.586334] 7e20: edfc7e28 00000000 00000000 edfc12c0 ed2fdaa0 00016040 00000000 00000000
[ 8.586334] 7e40: 00000400 60000033 ed003640 edfc7e8c edfc12c0 c051b3c3 00016043 00000000
[ 8.586334] 7e60: 00000400 00000400 00011842 00011ad7 00000000 ed2fdaa0 ed2fdbc4 c0157769
[ 8.586334] 7e80: c0159321 c00e0e29 000046b1 00000000 00011ad7 00000000 edfc12c0 c00e0d4d
[ 8.586364] 7ea0: 000058b5 00000000 00011adb 00000000 00011ad4 00000000 00080000 00000000
[ 8.586364] 7ec0: 000080d2 000046b1 00000004 00000000 00000003 00000000 00011ad7 00000000
[ 8.586364] 7ee0: 00000004 00000000 00000004 00000005 000058b5 00000000 000058b5 00000000
[ 8.586395] 7f00: 00000a02 00000000 00000002 edfc7f78 ed2fdaa0 edfc12c0 c0f00e48 c0f00e3c
[ 8.586395] 7f20: bfe28000 ed2fdaa0 c1708320 edf96a80 0001ffff c00e38c3 edfc7f58 c007313f
[ 8.586395] 7f40: 00000000 c08c040f 00000059 c0057f91 edaee040 c000d284 edaee3f8 00020000
[ 8.586395] 7f60: edaee040 ede99000 00000000 edfc12f8 f00f5000 edfc131c 013be860 c0074e9d
[ 8.586425] 7f80: 00000000 00000000 013be870 00000003 00000057 c000d284 edfc6000 00000000
[ 8.586425] 7fa0: 013be860 c000d081 00000000 013be870 013be860 00000000 00000000 00000001
[ 8.586425] 7fc0: 00000000 013be870 00000003 00000057 20000000 00000000 00014158 013be860
[ 8.586456] 7fe0: b6f19c50 bef24bec 0000a345 b6f19c5c 80000010 013be860 ae7f6821 ae7f6c21
[ 8.586456] Code: f8b9 e7d5 7db4 c005 (e92d) 41f0
[ 8.586456] ---[ end trace 82d139b2052ebc0d ]---
[ 8.594207] pgd = edf20000
[ 8.871246] [00000000] *pgd=00000000
[ 8.871246] Internal error: Oops: 80000005 [#2] SMP THUMB2
[ 8.871246] Modules linked in:
[ 8.871246] CPU: 1 PID: 837 Comm: ureadahead Tainted: G D 3.10.37 #133
[ 8.871246] task: edaf6a40 ti: edf0e000 task.ti: edf0e000
[ 8.871246] PC is at 0x0
[ 8.871246] LR is at 0x1
[ 8.871246] pc : [<00000000>] lr : [<00000001>] psr: 200000b3
[ 8.871246] sp : edf0fafc ip : edf0e010 fp : 00000000
[ 8.915069] r10: edf0e000 r9 : 00002000 r8 : c08c08d2
[ 8.915069] r7 : edf0e018 r6 : edd582d8 r5 : eddf7518 r4 : 00000001
[ 8.920593] r3 : edf0e000 r2 : 00000002 r1 : 0000000b r0 : 00000000
[ 8.927490] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA Thumb Segment user
[ 8.927490] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA Thumb Segment user
[ 8.934387] Control: 50c5387d Table: adf2004a DAC: 00000015
[ 8.942199] Process ureadahead (pid: 837, stack limit = 0xedf0e240)
[ 8.948272] Stack: (0xedf0fafc to 0xedf10000)
[ 8.948272] fae0: 00000000
[ 8.948272] fb00: c02caa9e eddf7518 ede21bc0 ede53b60 ede21bc0 eddae200 ede53b60 c02d3271
[ 8.968139] fb20: c02d3235 00000001 ede53b60 c02c3995 eddf7518 ede21bc0 edf0fb64 c02c3add
[ 8.968139] fb40: ede21c40 eddf7518 00000000 00000000 ede21bc0 c02c89b9 ede21c40 ede21bc0
[ 8.968139] fb60: 40000013 ede21c40 ede21c40 edf0e000 edf0e008 00000000 00000002 00000000
[ 8.968139] fb80: c010c021 c02c7959 00000000 00000000 00000000 00000000 00000000 ede21c40
[ 9.002716] fba0: c08364c8 c02c79dd ed2f4888 ed46a888 80000000 09000000 eda0f5c0 00000001
[ 9.002716] fbc0: 00000010 00002000 00000000 c010c021 00000000 c010febd 00ec4600 271ae739
[ 9.002716] fbe0: c08364c8 001002c8 00000000 ede21c40 ed46a748 00002000 00000000 c010c021
[ 9.002716] fc00: 00000000 c010d317 ed46a780 ed46a748 00000001 edf0fc54 00002000 00000001
[ 9.037292] fc20: c010b741 c010d4c5 00080165 00000000 00080165 00000000 eddb8800 ed46bba0
[ 9.037292] fc40: 00080180 c010de93 00000400 00000000 00000106 ed46a748 edd64800 c0157fa1
[ 9.037292] fc60: 00000400 00000000 c17e0200 ed46bba0 00080160 00000000 00080180 00000000
[ 9.071868] fc80: 00080162 00000000 ed39e6c8 00000000 edf0fdb0 00000000 c1805dcc edf0fd00
[ 9.071868] fca0: 00010507 ed46bba0 edf0fd98 c08364c8 ed468ba0 eddb8800 00000000 c0159be3
[ 9.071868] fcc0: c08d1c64 0000000e 00000001 edaf6ec8 c0a80858 00000000 00000001 c0896be4
[ 9.071868] fce0: 000810a2 271ae739 edaf6ec8 00000400 00000000 c1b0f8a0 00000400 000000a0
[ 9.106445] fd00: c1b0f800 ed3e27c8 ed3e3490 00000001 ed468bcc c016086d c1b0f8a0 ed3e27c8
[ 9.106445] fd20: c1b0f800 00000400 000000a0 c0057f91 00000001 00000000 edf0fe04 00000001
[ 9.106445] fd40: ed3e3490 ed3e27c8 00000001 c0160a77 ed468bb8 00000000 edf0fe04 00000004
[ 9.106445] fd60: 00000006 00000001 00000001 00000000 eddb8800 ed468bb8 edf0fe04 c0160d07
[ 9.141021] fd80: c06dcf7c ed3e27c8 00000000 00000000 ed3e27c8 edf0e000 80000013 c0077009
[ 9.141021] fda0: 00010507 ede5f800 00000000 c00f93f3 00000000 00000200 00000041 271ae739
[ 9.141021] fdc0: c06d458c ed468ba0 00010507 ed3e3490 ed3e4d98 00000000 ed468ba0 edf14ac0
[ 9.141021] fde0: ed3e3490 c0160d07 edf0fe6b 00710070 edf0e000 ed3e4dec ed468ba0 c051ab33
[ 9.175598] fe00: ed3e4d98 c1b0f8a0 00000000 ed468ba0 00000000 00060000 ed3e4d98 c00ef48f
[ 9.175598] fe20: 00000000 edf0ff00 edf0ff78 c00f275b edf0ff78 ffffff9c edf0fec0 edf0ff00
[ 9.175598] fe40: edf0e000 edf0e010 00000024 ed3e4d98 ed3e4d98 00000000 00000000 00000000
[ 9.175598] fe60: 8e2fc2a5 00000009 018d202f 00000000 c08378e4 edf14ac0 edf0ff00 ed8d2000
[ 9.175598] fe80: edf0ff78 edf0fec0 edf0e000 00000000 edf0e000 c00f2b97 edf0febc ed8d2000
[ 9.210174] fea0: 00000000 00000001 c00d447c edf0e000 00000013 00000000 00000000 00000000
[ 9.210174] fec0: 00000000 00000000 c00fdb0f edf0e000 80000013 00000001 edf0ff78 ed8d2000
[ 9.210174] fee0: ffffff9c ffffff9c edf0e000 00000000 0001d270 c00f3789 00000041 c0077393
[ 9.210174] ff00: ed828510 ed3e4d98 8e2fc2a5 00000009 ed8d202f 00000000 ed828510 ed22b510
[ 9.244750] ff20: ed3e3490 00000101 00000002 00000000 00000000 c051ab33 00000000 c00fdb61
[ 9.244750] ff40: ed9c4510 00060000 00000000 ed8d2000 00060000 00000000 00000001 ed8d2000
[ 9.244750] ff60: 00060000 0000014f 00000001 c00e8413 0001cd20 c0074e9d 00060000 00000000
[ 9.244750] ff80: 00000024 00000100 000001b7 b6d732a0 00000155 000001b7 00000005 c000d284
[ 9.279327] ffa0: edf0e000 c000d081 b6d732a0 00000155 b6d732a0 00060000 00000000 00000000
[ 9.279327] ffc0: b6d732a0 00000155 000001b7 00000005 b6fff0d5 00000001 0000014c 0001d270
[ 9.279327] ffe0: 00000005 b5d54d48 b6f39edd b6f3b386 80000030 b6d732a0 00000000 00000000
[ 9.279327] Code: bad PC value
[ 9.313903] ---[ end trace 82d139b2052ebc0e ]---
[ 9.322052] note: ureadahead[837] exited with preempt_count 2
[ 29.555389] BUG: spinlock lockup suspected on CPU#0, mmcqd/0/804
[ 29.558349] lock: 0xedd53c00, .magic: dead4ead, .owner: ureadahead/837, .owner_cpu: 1
[ 29.558349] CPU: 0 PID: 804 Comm: mmcqd/0 Tainted: G D 3.10.37 #133

[Alex Shi (alex-shi)]

Please update all panda related bug since cpu idle issue fixed in 3.10.43.