syzbot


kernel BUG in nilfs_delete_entry

Status: upstream: reported C repro on 2024/04/29 13:18
Subsystems: nilfs
[Documentation on labels]
Reported-by: syzbot+32c3706ebf5d95046ea1@syzkaller.appspotmail.com
First crash: 48d, last: 2d05h
Cause bisection: introduced by (bisect log) :
commit 602ce7b8e1343b19c0cf93a3dd1926838ac5a1cc
Author: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Date: Fri Jan 27 13:22:02 2023 +0000

  nilfs2: prevent WARNING in nilfs_dat_commit_end()

Crash: WARNING in mark_buffer_dirty (log)
Repro: C syz .config
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [nilfs?] kernel BUG in nilfs_delete_entry 1 (2) 2024/04/29 18:11
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/05/13 04:47 12m retest repro upstream report log
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/06/12 07:26 1h53m bisect fix upstream job log (0) log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/nilfs2/dir.c:545!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 5115 Comm: syz-executor410 Not tainted 6.9.0-rc5-syzkaller-00296-g5eb4573ea63d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:nilfs_delete_entry+0x349/0x350 fs/nilfs2/dir.c:545
Code: 8d fe e9 de fd ff ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 20 ff ff ff 4c 89 ff e8 f2 a6 8d fe e9 13 ff ff ff e8 68 56 2c fe 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900036078b8 EFLAGS: 00010293
RAX: ffffffff8369aa08 RBX: 0000000000000050 RCX: ffff888018339e00
RDX: 0000000000000000 RSI: 00000000fffffffb RDI: 0000000000000000
RBP: 00000000fffffffb R08: ffffffff8369a8de R09: 1ffff1100806d722
R10: dffffc0000000000 R11: ffffed100806d723 R12: ffffea00010fed80
R13: ffff888043fb6038 R14: 0000000000000020 R15: ffff888043fb6020
FS:  00007fa2992ee6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd3dbd8b98 CR3: 0000000024b86000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_rename+0x57d/0xaf0 fs/nilfs2/namei.c:413
 vfs_rename+0xbdb/0xf00 fs/namei.c:4880
 do_renameat2+0xd94/0x13f0 fs/namei.c:5037
 __do_sys_renameat2 fs/namei.c:5071 [inline]
 __se_sys_renameat2 fs/namei.c:5068 [inline]
 __x64_sys_renameat2+0xd2/0xf0 fs/namei.c:5068
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa299358f49
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa2992ee218 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007fa2993e16d8 RCX: 00007fa299358f49
RDX: 0000000000000006 RSI: 0000000020000100 RDI: 0000000000000005
RBP: 00007fa2993e16d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000580 R11: 0000000000000246 R12: 00007fa2993ade20
R13: 00007fa2993adb68 R14: 0030656c69662f2e R15: 3e2efc42dc31fca1
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nilfs_delete_entry+0x349/0x350 fs/nilfs2/dir.c:545
Code: 8d fe e9 de fd ff ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 20 ff ff ff 4c 89 ff e8 f2 a6 8d fe e9 13 ff ff ff e8 68 56 2c fe 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900036078b8 EFLAGS: 00010293

RAX: ffffffff8369aa08 RBX: 0000000000000050 RCX: ffff888018339e00
RDX: 0000000000000000 RSI: 00000000fffffffb RDI: 0000000000000000
RBP: 00000000fffffffb R08: ffffffff8369a8de R09: 1ffff1100806d722
R10: dffffc0000000000 R11: ffffed100806d723 R12: ffffea00010fed80
R13: ffff888043fb6038 R14: 0000000000000020 R15: ffff888043fb6020
FS:  00007fa2992ee6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa2993149f0 CR3: 0000000024b86000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/27 10:35 upstream 5eb4573ea63d 07b455f9 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-upstream-fs kernel BUG in nilfs_delete_entry
2024/06/12 22:57 upstream cea2a26553ac f815599d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in nilfs_delete_entry
2024/04/29 04:40 upstream e67572cd2204 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in nilfs_delete_entry
2024/04/27 09:57 upstream 5eb4573ea63d 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in nilfs_delete_entry
* Struck through repros no longer work on HEAD.