Hello,
kernel test robot noticed "kernel_BUG_at_block/bdev.c" on:
commit: b80d7798a6f9db2c094014570a73728ace8d844d ("[PATCH 5/9] Block: switch bd_prepare_to_claim to use ___wait_var_event()")
url: https://github.com/intel-lab-lkp/linux/commits/NeilBrown/i915-remove-wake_up-on-I915_RESET_MODESET/20240819-134414
base: git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next
patch link: https://lore.kernel.org/all/20240819053605.11706-6-neilb@xxxxxxx/
patch subject: [PATCH 5/9] Block: switch bd_prepare_to_claim to use ___wait_var_event()
in testcase: boot
compiler: clang-18
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+------------------------------------------+------------+------------+
| | 30a670cac3 | b80d7798a6 |
+------------------------------------------+------------+------------+
| boot_successes | 9 | 0 |
| boot_failures | 0 | 9 |
| kernel_BUG_at_block/bdev.c | 0 | 9 |
| Oops:invalid_opcode:#[##]PREEMPT_SMP_PTI | 0 | 9 |
| RIP:bd_finish_claiming | 0 | 9 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 9 |
+------------------------------------------+------------+------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202408211439.954a6d41-lkp@xxxxxxxxx
[ 8.768327][ T2733] ------------[ cut here ]------------
[ 8.768333][ T2733] kernel BUG at block/bdev.c:583!
[ 8.768342][ T2733] Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI
[ 8.768348][ T2733] CPU: 1 UID: 0 PID: 2733 Comm: cdrom_id Not tainted 6.11.0-rc3-00005-gb80d7798a6f9 #1
[ 8.768352][ T2733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 8.768355][ T2733] RIP: 0010:bd_finish_claiming (block/bdev.c:583)
[ 8.768388][ T2733] Code: 48 c7 03 00 00 00 00 f0 83 44 24 fc 00 48 89 df e8 0f bc b1 ff 48 c7 c7 00 97 a0 82 5b 41 5c 41 5d 41 5e 41 5f e9 5a aa 95 00 <0f> 0b 0f 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90
All code
========
0: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)
7: f0 83 44 24 fc 00 lock addl $0x0,-0x4(%rsp)
d: 48 89 df mov %rbx,%rdi
10: e8 0f bc b1 ff call 0xffffffffffb1bc24
15: 48 c7 c7 00 97 a0 82 mov $0xffffffff82a09700,%rdi
1c: 5b pop %rbx
1d: 41 5c pop %r12
1f: 41 5d pop %r13
21: 41 5e pop %r14
23: 41 5f pop %r15
25: e9 5a aa 95 00 jmp 0x95aa84
2a:* 0f 0b ud2 <-- trapping instruction
2c: 0f 0b ud2
2e: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
34: 90 nop
35: 90 nop
36: 90 nop
37: 90 nop
38: 90 nop
39: 90 nop
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 0f 0b ud2
4: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
[ 8.768392][ T2733] RSP: 0000:ffffc90000a5bc00 EFLAGS: 00010246
[ 8.768396][ T2733] RAX: 0000000000000000 RBX: ffff888125940000 RCX: 0000000000000000
[ 8.768398][ T2733] RDX: 0000000000000000 RSI: ffff88812a326800 RDI: ffff888125940000
[ 8.768400][ T2733] RBP: 000000000000000d R08: 0000000000000004 R09: 00000002f1ee446d
[ 8.768402][ T2733] R10: 00646b636f6c6200 R11: ffffffffa0015f60 R12: ffff888125940000
[ 8.768404][ T2733] R13: 0000000000000000 R14: ffff88812a326800 R15: 0000000000000000
[ 8.768407][ T2733] FS: 0000000000000000(0000) GS:ffff88842fd00000(0063) knlGS:00000000f7d406c0
[ 8.768410][ T2733] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[ 8.768412][ T2733] CR2: 00000000f7d0315c CR3: 000000012a244000 CR4: 00000000000406f0
[ 8.768417][ T2733] Call Trace:
[ 8.769866][ T2733] <TASK>
[ 8.769875][ T2733] ? __die_body (arch/x86/kernel/dumpstack.c:421)
[ 8.769884][ T2733] ? die (arch/x86/kernel/dumpstack.c:? arch/x86/kernel/dumpstack.c:447)
[ 8.769888][ T2733] ? do_trap (arch/x86/kernel/traps.c:129)
[ 8.769893][ T2733] ? bd_finish_claiming (block/bdev.c:583)
[ 8.769898][ T2733] ? do_error_trap (arch/x86/kernel/traps.c:175)
[ 8.769902][ T2733] ? bd_finish_claiming (block/bdev.c:583)
[ 8.769905][ T2733] ? handle_invalid_op (arch/x86/kernel/traps.c:212)
[ 8.769909][ T2733] ? bd_finish_claiming (block/bdev.c:583)
[ 8.769912][ T2733] ? exc_invalid_op (arch/x86/kernel/traps.c:267)
[ 8.769917][ T2733] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621)
[ 8.769926][ T2733] ? __pfx_sr_open (drivers/scsi/sr.c:593) sr_mod
[ 8.769932][ T2733] ? bd_finish_claiming (block/bdev.c:583)
[ 8.769936][ T2733] bdev_open (block/bdev.c:914)
[ 8.769940][ T2733] ? iput (fs/inode.c:1821)
[ 8.769945][ T2733] blkdev_open (block/fops.c:631)
[ 8.769949][ T2733] ? __pfx_blkdev_open (block/fops.c:610)
[ 8.769952][ T2733] do_dentry_open (fs/open.c:959)
[ 8.769958][ T2733] vfs_open (fs/open.c:1089)
[ 8.769962][ T2733] path_openat (fs/namei.c:3727)
[ 8.769966][ T2733] ? call_rcu (kernel/rcu/tree.c:2996)
[ 8.769972][ T2733] do_filp_open (fs/namei.c:3913)
[ 8.769978][ T2733] do_sys_openat2 (fs/open.c:1416)
[ 8.769982][ T2733] do_sys_open (fs/open.c:1431)
[ 8.769986][ T2733] do_int80_emulation (arch/x86/entry/common.c:?)
[ 8.769990][ T2733] ? irqentry_exit_to_user_mode (arch/x86/include/asm/processor.h:702 arch/x86/include/asm/entry-common.h:91 include/linux/entry-common.h:364 kernel/entry/common.c:233)
[ 8.769994][ T2733] asm_int80_emulation (arch/x86/include/asm/idtentry.h:626)
[ 8.769999][ T2733] RIP: 0023:0xf7f111b2
[ 8.770004][ T2733] Code: 89 c2 31 c0 89 d7 f3 aa 8b 44 24 1c 89 30 c6 40 04 00 83 c4 2c 89 f0 5b 5e 5f 5d c3 90 90 90 90 90 90 90 90 90 90 90 90 cd 80 <c3> 8d b6 00 00 00 00 8d bc 27 00 00 00 00 8b 1c 24 c3 8d b6 00 00
All code
========
0: 89 c2 mov %eax,%edx
2: 31 c0 xor %eax,%eax
4: 89 d7 mov %edx,%edi
6: f3 aa rep stos %al,%es:(%rdi)
8: 8b 44 24 1c mov 0x1c(%rsp),%eax
c: 89 30 mov %esi,(%rax)
e: c6 40 04 00 movb $0x0,0x4(%rax)
12: 83 c4 2c add $0x2c,%esp
15: 89 f0 mov %esi,%eax
17: 5b pop %rbx
18: 5e pop %rsi
19: 5f pop %rdi
1a: 5d pop %rbp
1b: c3 ret
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 90 nop
23: 90 nop
24: 90 nop
25: 90 nop
26: 90 nop
27: 90 nop
28: cd 80 int $0x80
2a:* c3 ret <-- trapping instruction
2b: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi
31: 8d bc 27 00 00 00 00 lea 0x0(%rdi,%riz,1),%edi
38: 8b 1c 24 mov (%rsp),%ebx
3b: c3 ret
3c: 8d .byte 0x8d
3d: b6 00 mov $0x0,%dh
...
Code starting with the faulting instruction
===========================================
0: c3 ret
1: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi
7: 8d bc 27 00 00 00 00 lea 0x0(%rdi,%riz,1),%edi
e: 8b 1c 24 mov (%rsp),%ebx
11: c3 ret
12: 8d .byte 0x8d
13: b6 00 mov $0x0,%dh
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240821/202408211439.954a6d41-lkp@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
