syzbot


kernel BUG in hfs_bnode_unhash

Status: upstream: reported on 2022/11/30 09:17
Reported-by: syzbot+b7ceb040f7552ed64dc9@syzkaller.appspotmail.com
First crash: 68d, last: 68d

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/hfs/bnode.c:310!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 27750 Comm: syz-executor.3 Not tainted 6.1.0-rc7-syzkaller-00101-g01f856ae6d0c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:hfs_bnode_unhash+0x155/0x160 fs/hfs/bnode.c:310
Code: ff ff 48 89 df e8 4b 8e 80 ff e9 17 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 7c c6 48 89 df e8 32 8e 80 ff eb bc e8 3b 72 2c ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 53 48 89 fb e8 27 72 2c ff 48 85
RSP: 0018:ffffc900033cf2a8 EFLAGS: 00010246
RAX: ffffffff825e25b5 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000d24b000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 1ffff1100e8b5428 R08: ffffffff825f3bb7 R09: ffffed1028a44c51
R10: ffffed1028a44c51 R11: 1ffff11028a44c50 R12: dffffc0000000000
R13: ffff8880745aa140 R14: ffff888145226200 R15: 0000000000000004
FS:  00007f33db891700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556f50848 CR3: 0000000027323000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_release_folio+0x34c/0x530 fs/hfs/inode.c:122
 fallback_migrate_folio+0x196/0x3e0 mm/migrate.c:909
 move_to_new_folio+0x259/0xd80 mm/migrate.c:951
 __unmap_and_move+0x6b6/0xeb0 mm/migrate.c:1112
 unmap_and_move+0x39a/0x1090 mm/migrate.c:1184
 migrate_pages+0x572/0x1450 mm/migrate.c:1461
 compact_zone+0x282e/0x3770 mm/compaction.c:2421
 compact_node+0x279/0x610 mm/compaction.c:2703
 compact_nodes mm/compaction.c:2719 [inline]
 sysctl_compaction_handler+0xa8/0x140 mm/compaction.c:2761
 proc_sys_call_handler+0x576/0x890 fs/proc/proc_sysctl.c:604
 call_write_iter include/linux/fs.h:2199 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7dc/0xc50 fs/read_write.c:584
 ksys_write+0x177/0x2a0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f33daa8c0d9
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:00007f33db891168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f33dababf80 RCX: 00007f33daa8c0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f33daae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0f1fd16f R14: 00007f33db891300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfs_bnode_unhash+0x155/0x160 fs/hfs/bnode.c:310
Code: ff ff 48 89 df e8 4b 8e 80 ff e9 17 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 7c c6 48 89 df e8 32 8e 80 ff eb bc e8 3b 72 2c ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 53 48 89 fb e8 27 72 2c ff 48 85
RSP: 0018:ffffc900033cf2a8 EFLAGS: 00010246
RAX: ffffffff825e25b5 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000d24b000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 1ffff1100e8b5428 R08: ffffffff825f3bb7 R09: ffffed1028a44c51
R10: ffffed1028a44c51 R11: 1ffff11028a44c50 R12: dffffc0000000000
R13: ffff8880745aa140 R14: ffff888145226200 R15: 0000000000000004
FS:  00007f33db891700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556f50848 CR3: 0000000027323000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-upstream-fs 2022/11/30 03:29 upstream 01f856ae6d0c 579a3740 .config console log report info [disk image] [vmlinux] [kernel image] kernel BUG in hfs_bnode_unhash
* Struck through repros no longer work on HEAD.