syzbot


kernel BUG in evict

Status: auto-obsoleted due to no activity on 2023/11/06 19:12
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+d046c45a08eb35df6964@syzkaller.appspotmail.com
First crash: 506d, last: 506d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 kernel BUG in evict origin:lts-only C done 107 162d 250d 0/3 auto-obsoleted due to no activity on 2024/10/10 04:11
linux-6.1 kernel BUG in evict origin:lts-only C done 12 185d 250d 0/3 upstream: reported C repro on 2024/04/20 12:22

Sample crash report:
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
page has been migrated, last migrate reason: compaction
------------[ cut here ]------------
kernel BUG at mm/truncate.c:423!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 2 PID: 5181 Comm: syz-executor.3 Not tainted 6.5.0-rc5-syzkaller-00050-g02aee814d37c #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:truncate_inode_pages_range+0xd9d/0xfb0 mm/truncate.c:423
Code: 4c 89 f7 e8 25 30 ce ff 4c 39 f3 0f 82 37 f8 ff ff e9 9f f8 ff ff e8 02 35 ce ff 48 c7 c6 c0 39 77 8a 4c 89 e7 e8 73 da 0a 00 <0f> 0b e8 ec 34 ce ff 48 c7 c6 60 3a 77 8a 48 89 ef e8 5d da 0a 00
RSP: 0018:ffffc90003f079f0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801f200000 RSI: ffffffff81b7d3ad RDI: ffffffff8ac81120
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff1d57382
R10: ffffffff8eab9c17 R11: 0000000000000000 R12: ffffea0000a76000
R13: ffffc90003f07b28 R14: ffffc90003f07b30 R15: 0000000000000694
FS:  0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:000000005842e400
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000c001cca200 CR3: 0000000074639000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 evict+0x533/0x6b0 fs/inode.c:667
 dispose_list+0x117/0x1e0 fs/inode.c:698
 evict_inodes+0x34f/0x450 fs/inode.c:748
 generic_shutdown_super+0xaf/0x480 fs/super.c:478
 kill_block_super+0x64/0xb0 fs/super.c:1417
 deactivate_locked_super+0x9a/0x170 fs/super.c:330
 deactivate_super+0xde/0x100 fs/super.c:361
 cleanup_mnt+0x222/0x3d0 fs/namespace.c:1254
 task_work_run+0x14d/0x240 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 __do_fast_syscall_32+0x6d/0xe0 arch/x86/entry/common.c:181
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f81579
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:00000000fff34108 EFLAGS: 00000292 ORIG_RAX: 0000000000000034
RAX: 0000000000000000 RBX: 00000000fff341b0 RCX: 000000000000000a
RDX: 00000000f7353ff4 RSI: 00000000f72a53bd RDI: 00000000fff35254
RBP: 00000000fff341b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:truncate_inode_pages_range+0xd9d/0xfb0 mm/truncate.c:423
Code: 4c 89 f7 e8 25 30 ce ff 4c 39 f3 0f 82 37 f8 ff ff e9 9f f8 ff ff e8 02 35 ce ff 48 c7 c6 c0 39 77 8a 4c 89 e7 e8 73 da 0a 00 <0f> 0b e8 ec 34 ce ff 48 c7 c6 60 3a 77 8a 48 89 ef e8 5d da 0a 00
RSP: 0018:ffffc90003f079f0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801f200000 RSI: ffffffff81b7d3ad RDI: ffffffff8ac81120
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff1d57382
R10: ffffffff8eab9c17 R11: 0000000000000000 R12: ffffea0000a76000
R13: ffffc90003f07b28 R14: ffffc90003f07b30 R15: 0000000000000694
FS:  0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:000000005842e400
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000c001cca200 CR3: 0000000074639000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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 (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/08 19:12 upstream 02aee814d37c 9552ae77 .config console log report info ci-qemu-upstream-386 kernel BUG in evict
* Struck through repros no longer work on HEAD.