syzbot


WARNING: locking bug in ext4_mb_add_groupinfo

Status: upstream: reported on 2024/05/18 05:23
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+caf3fed221ac23a1398f@syzkaller.appspotmail.com
First crash: 31d, last: 12h42m
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ext4?] WARNING: locking bug in ext4_mb_add_groupinfo 0 (1) 2024/05/18 05:23

Sample crash report:
EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled
------------[ cut here ]------------
Looking for class "->lock" with key __key.0, but found a different class "&c->lock" with the same key
WARNING: CPU: 0 PID: 6567 at kernel/locking/lockdep.c:932 look_up_lock_class+0x133/0x140 kernel/locking/lockdep.c:932
Modules linked in:
CPU: 0 PID: 6567 Comm: syz-executor.0 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #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 cc 53 74 f6 90 0f 0b 90 90 90 31 db eb be c6 05 f5 86 ef 04 01 90 48 c7 c7 40 bc 2c 8b e8 ae 53 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:ffffc90002ccf4d8 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffffffff941fc940 RCX: ffffffff81511289
RDX: ffff88801f9bc880 RSI: ffffffff81511296 RDI: 0000000000000001
RBP: ffffffff94af0d50 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 000000006b6f6f4c R12: ffffe8ffad07b950
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff94ad8be0
FS:  0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:00000000f5ecdb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5ece000 CR3: 00000000288ba000 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
 ext4_mb_add_groupinfo+0x445/0x1180 fs/ext4/mballoc.c:3355
 ext4_mb_init_backend fs/ext4/mballoc.c:3434 [inline]
 ext4_mb_init+0x127a/0x2530 fs/ext4/mballoc.c:3732
 __ext4_fill_super fs/ext4/super.c:5501 [inline]
 ext4_fill_super+0x6d55/0xacf0 fs/ext4/super.c:5676
 get_tree_bdev+0x36f/0x610 fs/super.c:1615
 vfs_get_tree+0x8f/0x380 fs/super.c:1780
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x6e1/0x1f10 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
 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: 0023:0xf72db579
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:00000000f5ecd400 EFLAGS: 00000292 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000f5ecd460 RCX: 0000000020000080
RDX: 0000000020000580 RSI: 0000000000008002 RDI: 00000000f5ecd4a0
RBP: 00000000f5ecd460 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 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 (23):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/14 16:00 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/12 03:34 upstream 2ef5971ff345 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/11 04:39 upstream 83a7eefedc9b c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/07 05:05 upstream d30d0e49da71 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/06 13:50 upstream 2df0193e62cf c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/05 23:46 upstream 71d7b52cc33b c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/05 13:42 upstream 32f88d65f01b c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/03 12:51 upstream c3f38fa61af7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/01 20:19 upstream cc8ed4d0a848 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/30 04:12 upstream 4a4be1ad3a6e c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/29 10:23 upstream e0cce98fe279 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/29 10:15 upstream e0cce98fe279 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/27 19:45 upstream 2bfcfd584ff5 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/26 19:53 upstream c13320499ba0 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/26 13:44 upstream c13320499ba0 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/22 21:49 upstream 29c73fc794c8 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/22 20:49 upstream 29c73fc794c8 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/21 17:37 upstream 8f6a15f095a6 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/20 21:09 upstream 6e51b4b5bbc0 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/14 05:12 upstream a5131c3fdf26 fdb4c10c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/21 17:23 linux-next 124cfbcd6d18 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: locking bug in ext4_mb_add_groupinfo
2024/06/05 10:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fda5695d692c e1e2c66e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_mb_add_groupinfo
2024/05/17 17:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fda5695d692c a12e99e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_mb_add_groupinfo
* Struck through repros no longer work on HEAD.