syzbot


WARNING in hfs_bmap_alloc

Status: upstream: reported on 2022/12/22 19:56
Subsystems: hfs
[Documentation on labels]
Reported-by: syzbot+55c191dd9f8441d6123a@syzkaller.appspotmail.com
First crash: 722d, last: 722d

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6608 at fs/hfs/bnode.c:431 hfs_bnode_create.cold+0x27/0x4e fs/hfs/bnode.c:431
Kernel panic - not syncing: panic_on_warn set ...

 hfs_bmap_alloc+0xfe/0x5e0 fs/hfs/btree.c:263
 hfs_btree_inc_height.isra.0+0xe6/0x950 fs/hfs/brec.c:471
 hfs_brec_insert+0x97f/0xbb0 fs/hfs/brec.c:77
 __hfs_ext_write_extent+0x3ec/0x510 fs/hfs/extent.c:124
 __hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
 hfs_ext_read_extent+0x810/0xa20 fs/hfs/extent.c:202
 hfs_extend_file+0x4a0/0xac0 fs/hfs/extent.c:401
 hfs_get_block+0x17b/0x7e0 fs/hfs/extent.c:353
 __block_write_begin_int+0x46c/0x17b0 fs/buffer.c:1978
 __block_write_begin fs/buffer.c:2028 [inline]
 block_write_begin+0x58/0x2e0 fs/buffer.c:2087
 cont_write_begin+0x55a/0x820 fs/buffer.c:2440
 hfs_write_begin+0x87/0x150 fs/hfs/inode.c:58
 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170
 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295
 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f3e19e6a0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3e183dc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3e19f89f80 RCX: 00007f3e19e6a0a9
RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007f3e183dc1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffda1e34e4f R14: 00007f3e183dc300 R15: 0000000000022000
CPU: 0 PID: 6608 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:hfs_bnode_create.cold+0x27/0x4e fs/hfs/bnode.c:431
Code: 14 07 fa e8 e8 39 6c f9 4c 89 ef e8 70 04 23 00 89 ee 48 c7 c7 e0 9c 7d 88 e8 3d 6b fd ff 48 c7 c7 40 9d 7d 88 e8 31 6b fd ff <0f> 0b e9 b1 1c 07 fa e8 ba 39 6c f9 89 ee 48 c7 c7 40 9a 7d 88 e8
RSP: 0018:ffff888044777290 EFLAGS: 00010282
RAX: 0000000000000024 RBX: dffffc0000000000 RCX: 0000000000000000
hfs: new node 0 already hashed?
RDX: 0000000000040000 RSI: ffffffff814dff01 RDI: ffffed10088eee44
RBP: 0000000000000000 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880aba63900
R13: ffff8880aa0ba210 R14: ffff8880aa0ba140 R15: 0000000000000000
------------[ cut here ]------------
 hfs_bmap_alloc+0x4d6/0x5e0 fs/hfs/btree.c:288
WARNING: CPU: 1 PID: 6610 at fs/hfs/bnode.c:431 hfs_bnode_create.cold+0x27/0x4e fs/hfs/bnode.c:431
 hfs_btree_inc_height.isra.0+0xe6/0x950 fs/hfs/brec.c:471
Modules linked in:
CPU: 1 PID: 6610 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:hfs_bnode_create.cold+0x27/0x4e fs/hfs/bnode.c:431
Code: 14 07 fa e8 e8 39 6c f9 4c 89 ef e8 70 04 23 00 89 ee 48 c7 c7 e0 9c 7d 88 e8 3d 6b fd ff 48 c7 c7 40 9d 7d 88 e8 31 6b fd ff <0f> 0b e9 b1 1c 07 fa e8 ba 39 6c f9 89 ee 48 c7 c7 40 9a 7d 88 e8
 hfs_brec_insert+0x84d/0xbb0 fs/hfs/brec.c:148
RSP: 0018:ffff88804e897290 EFLAGS: 00010282
RAX: 0000000000000024 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff814dff01 RDI: ffffed1009d12e44
 __hfs_ext_write_extent+0x3ec/0x510 fs/hfs/extent.c:124
RBP: 0000000000000000 R08: 0000000000000024 R09: 0000000000000000
 __hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
 hfs_ext_read_extent+0x810/0xa20 fs/hfs/extent.c:202
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880ac2a4a00
R13: ffff88805210a6d0 R14: ffff88805210a600 R15: 0000000000000000
FS:  00007f3e183dc700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9527b67018 CR3: 00000000a944d000 CR4: 00000000003426e0
 hfs_extend_file+0x4a0/0xac0 fs/hfs/extent.c:401
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hfs_bmap_alloc+0x4d6/0x5e0 fs/hfs/btree.c:288
 hfs_get_block+0x17b/0x7e0 fs/hfs/extent.c:353
 __block_write_begin_int+0x46c/0x17b0 fs/buffer.c:1978
 hfs_btree_inc_height.isra.0+0xe6/0x950 fs/hfs/brec.c:471
 __block_write_begin fs/buffer.c:2028 [inline]
 block_write_begin+0x58/0x2e0 fs/buffer.c:2087
 cont_write_begin+0x55a/0x820 fs/buffer.c:2440
 hfs_brec_insert+0x84d/0xbb0 fs/hfs/brec.c:148
 __hfs_ext_write_extent+0x3ec/0x510 fs/hfs/extent.c:124
 __hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
 hfs_ext_read_extent+0x810/0xa20 fs/hfs/extent.c:202
 hfs_write_begin+0x87/0x150 fs/hfs/inode.c:58
 hfs_extend_file+0x4a0/0xac0 fs/hfs/extent.c:401
 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170
 hfs_get_block+0x17b/0x7e0 fs/hfs/extent.c:353
 __block_write_begin_int+0x46c/0x17b0 fs/buffer.c:1978
 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295
 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 __block_write_begin fs/buffer.c:2028 [inline]
 block_write_begin+0x58/0x2e0 fs/buffer.c:2087
 cont_write_begin+0x55a/0x820 fs/buffer.c:2440
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1ebeae30a9
 hfs_write_begin+0x87/0x150 fs/hfs/inode.c:58
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1ebd055168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170
RAX: ffffffffffffffda RBX: 00007f1ebec02f80 RCX: 00007f1ebeae30a9
RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007f1ebd0551d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd87d3772f R14: 00007f1ebd055300 R15: 0000000000022000
 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295
 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f3e19e6a0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3e183dc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3e19f89f80 RCX: 00007f3e19e6a0a9
RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007f3e183dc1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffda1e34e4f R14: 00007f3e183dc300 R15: 0000000000022000
irq event stamp: 6554
hardirqs last  enabled at (6553): [<ffffffff88195174>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last  enabled at (6553): [<ffffffff88195174>] _raw_spin_unlock_irq+0x24/0x80 kernel/locking/spinlock.c:192
hardirqs last disabled at (6554): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c
softirqs last  enabled at (6506): [<ffffffff88400678>] __do_softirq+0x678/0x980 kernel/softirq.c:318
softirqs last disabled at (6367): [<ffffffff813927d5>] invoke_softirq kernel/softirq.c:372 [inline]
softirqs last disabled at (6367): [<ffffffff813927d5>] irq_exit+0x215/0x260 kernel/softirq.c:412
---[ end trace c0ab782fd6b28be8 ]---
Kernel Offset: disabled
Rebooting in 86400 seconds..
----------------
Code disassembly (best guess):
   0:	28 00                	sub    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	75 05                	jne    0xb
   6:	48 83 c4 28          	add    $0x28,%rsp
   a:	c3                   	retq
   b:	e8 f1 19 00 00       	callq  0x1a01
  10:	90                   	nop
  11:	48 89 f8             	mov    %rdi,%rax
  14:	48 89 f7             	mov    %rsi,%rdi
  17:	48 89 d6             	mov    %rdx,%rsi
  1a:	48 89 ca             	mov    %rcx,%rdx
  1d:	4d 89 c2             	mov    %r8,%r10
  20:	4d 89 c8             	mov    %r9,%r8
  23:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  28:	0f 05                	syscall
* 2a:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax <-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	retq
  33:	48 c7 c1 b8 ff ff ff 	mov    $0xffffffffffffffb8,%rcx
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/12/22 19:56 linux-4.19.y 3f8a27f9e27b 9da18ae8 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 WARNING in hfs_bmap_alloc
* Struck through repros no longer work on HEAD.