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Message-ID: <693832b7.050a0220.4004e.002b.GAE@google.com> Date: Tue, 09 Dec 2025 06:31:19 -0800 From: syzbot ci <syzbot+ci5ba1b27c8540e946@...kaller.appspotmail.com> To: adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, liubaolin12138@....com, liubaolin@...inos.cn, tytso@....edu Cc: syzbot@...ts.linux.dev, syzkaller-bugs@...glegroups.com Subject: [syzbot ci] Re: ext4: add sysfs attribute err_report_sec to control s_err_report timer 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@...kaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@...glegroups.com.
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