[syzbot ci] Re: ext4: add sysfs attribute err_report_sec to control s_err_report timer

[syzbot ci <syzbot+ci5ba1b27c8540e946@syzkaller.appspotmail.com>]

syzbot ci has tested the following series

[v1] ext4: add sysfs attribute err_report_sec to control s_err_report timer
https://lore.kernel.org/all/20251209095254.11569-1-liubaolin12138@163.com
* [PATCH v1] ext4: add sysfs attribute err_report_sec to control s_err_report timer

and found the following issue:
WARNING: ODEBUG bug in ext4_update_super

Full report is available here:
https://ci.syzbot.org/series/0516238c-3b72-42ec-95e0-a3a1100dfe97

***

WARNING: ODEBUG bug in ext4_update_super

tree:      torvalds
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
base:      67a454e6b1c604555c04501c77b7fedc5d98a779
arch:      amd64
compiler:  Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config:    https://ci.syzbot.org/builds/d05c5a00-1dcc-4a73-9a08-de39905551e0/config
C repro:   https://ci.syzbot.org/findings/f5e1c416-0890-43de-a395-f7444bcf3202/c_repro
syz repro: https://ci.syzbot.org/findings/f5e1c416-0890-43de-a395-f7444bcf3202/syz_repro

EXT4-fs error (device loop0): ext4_orphan_get:1391: inode #15: comm syz.0.17: iget: bad i_size value: 360287970189639680
------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object: ffff88816a5866c8 object type: timer_list hint: 0x0
WARNING: lib/debugobjects.c:615 at 0x0, CPU#1: syz.0.17/5984
Modules linked in:
CPU: 1 UID: 0 PID: 5984 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_print_object+0x170/0x1e0 lib/debugobjects.c:612
Code: f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 b7 e0 8f fd 4d 8b 0f 4c 89 ef 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f0 ff 34 24 <67> 48 0f b9 3a 48 83 c4 08 ff 05 8d 86 e9 0a 48 83 c4 10 5b 41 5c
RSP: 0018:ffffc90004927210 EFLAGS: 00010246
RAX: 1ffffffff16da490 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffffffff8bc02f80 RSI: ffffffff8bc02a40 RDI: ffffffff8f8bd1a0
RBP: ffffffff8bc02f80 R08: ffff88816a5866c8 R09: ffffffff8b6d35e0
R10: dffffc0000000000 R11: ffffffff81aeb6f0 R12: 0000000000000000
R13: ffffffff8f8bd1a0 R14: ffff88816a5866c8 R15: ffffffff8b6d2480
FS:  0000555563b84500(0000) GS:ffff8882a9e44000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3e58d73ea0 CR3: 0000000114724000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 debug_object_assert_init+0x2db/0x380 lib/debugobjects.c:1020
 debug_timer_assert_init kernel/time/timer.c:803 [inline]
 debug_assert_init kernel/time/timer.c:848 [inline]
 __mod_timer+0x4a/0xf30 kernel/time/timer.c:1025
 ext4_update_super+0xc23/0x12f0 fs/ext4/super.c:6239
 ext4_commit_super+0x67/0x430 fs/ext4/super.c:6257
 ext4_handle_error+0x65e/0x950 fs/ext4/super.c:718
 __ext4_error_inode+0x328/0x4f0 fs/ext4/super.c:861
 __ext4_iget+0x187b/0x4280 fs/ext4/inode.c:-1
 ext4_orphan_get+0x1e3/0x630 fs/ext4/ialloc.c:1391
 ext4_orphan_cleanup+0xad2/0x1460 fs/ext4/orphan.c:465
 __ext4_fill_super fs/ext4/super.c:5661 [inline]
 ext4_fill_super+0x58e5/0x6240 fs/ext4/super.c:5785
 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691
 vfs_get_tree+0x92/0x2a0 fs/super.c:1751
 fc_mount fs/namespace.c:1199 [inline]
 do_new_mount_fc fs/namespace.c:3636 [inline]
 do_new_mount+0x302/0xa10 fs/namespace.c:3712
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount+0x313/0x410 fs/namespace.c:4201
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3e58d90f6a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde744ab68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffde744abf0 RCX: 00007f3e58d90f6a
RDX: 0000200000000880 RSI: 0000200000000500 RDI: 00007ffde744abb0
RBP: 0000200000000880 R08: 00007ffde744abf0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000500
R13: 00007ffde744abb0 R14: 0000000000000524 R15: 00002000000003c0
 </TASK>
----------------
Code disassembly (best guess):
   0:	f8                   	clc
   1:	48 c1 e8 03          	shr    $0x3,%rax
   5:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
   9:	74 08                	je     0x13
   b:	4c 89 ff             	mov    %r15,%rdi
   e:	e8 b7 e0 8f fd       	call   0xfd8fe0ca
  13:	4d 8b 0f             	mov    (%r15),%r9
  16:	4c 89 ef             	mov    %r13,%rdi
  19:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  1e:	48 89 ea             	mov    %rbp,%rdx
  21:	44 89 e1             	mov    %r12d,%ecx
  24:	4d 89 f0             	mov    %r14,%r8
  27:	ff 34 24             	push   (%rsp)
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	ff 05 8d 86 e9 0a    	incl   0xae9868d(%rip)        # 0xae986c6
  39:	48 83 c4 10          	add    $0x10,%rsp
  3d:	5b                   	pop    %rbx
  3e:	41 5c                	pop    %r12


***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: syzbot@syzkaller.appspotmail.com

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