syzbot


WARNING: locking bug in mempool_alloc_noprof

Status: auto-obsoleted due to no activity on 2024/10/03 16:20
Subsystems: block
[Documentation on labels]
Reported-by: syzbot+c8ae2cacba71e6145314@syzkaller.appspotmail.com
First crash: 132d, last: 103d
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly block report (Jun 2024) 0 (1) 2024/06/14 08:06
[syzbot] [block?] WARNING: locking bug in mempool_alloc_noprof 0 (1) 2024/05/31 13:49

Sample crash report:
------------[ cut here ]------------
Looking for class "oom_rs.lock" with key __key.0, but found a different class "&c->lock" with the same key
WARNING: CPU: 3 PID: 10262 at kernel/locking/lockdep.c:932 look_up_lock_class+0x133/0x140 kernel/locking/lockdep.c:932
Modules linked in:
CPU: 3 PID: 10262 Comm: syz-executor.3 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:look_up_lock_class+0x133/0x140 kernel/locking/lockdep.c:932
Code: c7 c7 20 b9 2c 8b e8 0c 04 74 f6 90 0f 0b 90 90 90 31 db eb be c6 05 78 4d ef 04 01 90 48 c7 c7 40 bc 2c 8b e8 ee 03 74 f6 90 <0f> 0b 90 90 e9 62 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90006386ab8 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffffffff941ff940 RCX: ffffc900279ad000
RDX: 0000000000040000 RSI: ffffffff81511296 RDI: 0000000000000001
RBP: ffffffff94af3d10 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 20676e696b6f6f4c R12: ffffe8ffad3710f0
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff94adbbe0
FS:  0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5f05b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7450784 CR3: 000000005c83e000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 register_lock_class+0xb1/0x1230 kernel/locking/lockdep.c:1284
 __lock_acquire+0x111/0x3b30 kernel/locking/lockdep.c:5014
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
 local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 ___slab_alloc+0x7bb/0x1870 mm/slub.c:3716
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757
 __slab_alloc_node mm/slub.c:3810 [inline]
 slab_alloc_node mm/slub.c:3989 [inline]
 kmem_cache_alloc_noprof+0x2ae/0x2f0 mm/slub.c:4008
 mempool_alloc_noprof+0x176/0x390 mm/mempool.c:402
 bio_alloc_bioset+0x480/0x8b0 block/bio.c:554
 bch2_writepage_io_alloc fs/bcachefs/fs-io-buffered.c:476 [inline]
 __bch2_writepage+0x107e/0x2500 fs/bcachefs/fs-io-buffered.c:610
 write_cache_pages+0xb0/0x130 mm/page-writeback.c:2591
 bch2_writepages+0x11f/0x200 fs/bcachefs/fs-io-buffered.c:650
 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2634
 filemap_fdatawrite_wbc mm/filemap.c:397 [inline]
 filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:387
 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:430
 filemap_write_and_wait_range mm/filemap.c:685 [inline]
 filemap_write_and_wait_range+0xa3/0x130 mm/filemap.c:676
 bch2_read_iter+0x1534/0x1ad0 fs/bcachefs/fs-io-direct.c:191
 copy_splice_read+0x615/0xb80 fs/splice.c:365
 do_splice_read fs/splice.c:984 [inline]
 do_splice_read+0x2cf/0x380 fs/splice.c:959
 splice_direct_to_actor+0x2a4/0xa40 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x17e/0x250 fs/splice.c:1233
 do_sendfile+0xb1e/0xe50 fs/read_write.c:1295
 __do_compat_sys_sendfile fs/read_write.c:1383 [inline]
 __se_compat_sys_sendfile fs/read_write.c:1366 [inline]
 __ia32_compat_sys_sendfile+0x1e7/0x230 fs/read_write.c:1366
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7313579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5f055ac EFLAGS: 00000292 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000000000e
RDX: 0000000000000000 RSI: 0000000000201005 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/25 16:19 upstream 55027e689933 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
2024/06/25 16:05 upstream 55027e689933 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
2024/06/18 20:08 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
2024/06/06 00:29 upstream 71d7b52cc33b c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
2024/06/03 10:59 upstream c3f38fa61af7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
2024/05/31 09:17 upstream 4a4be1ad3a6e c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
2024/05/29 06:54 upstream e0cce98fe279 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
2024/05/27 19:12 upstream 2bfcfd584ff5 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
2024/05/27 13:47 upstream 1613e604df0c c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in mempool_alloc_noprof
* Struck through repros no longer work on HEAD.