Hello, syzbot found the following issue on:
HEAD commit: 015a99fa7665 Merge tag 'nolibc-20250526-for-6.16-1' of git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16fcedf4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=231a962e5fdb804b dashboard link: https://syzkaller.appspot.com/bug?extid=88e6a26b68fb670364e1 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f68bd0ec2940/disk-015a99fa.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8c78735943b8/vmlinux-015a99fa.xz kernel image: https://storage.googleapis.com/syzbot-assets/7d9332085f01/bzImage-015a99fa.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] ODEBUG: object ffffc9000d537a98 is on stack ffffc9000d530000, but NOT annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 16496 at lib/debugobjects.c:655 debug_object_is_on_stack lib/debugobjects.c:655 [inline] WARNING: CPU: 1 PID: 16496 at lib/debugobjects.c:655 lookup_object_or_alloc.part.0+0x2b1/0x590 lib/debugobjects.c:688 Modules linked in: CPU: 1 UID: 0 PID: 16496 Comm: bch-copygc/loop Not tainted 6.15.0-syzkaller-02443-g015a99fa7665 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:655 [inline] RIP: 0010:lookup_object_or_alloc.part.0+0x2b1/0x590 lib/debugobjects.c:688 Code: 0e 48 8d 7d 20 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 58 02 00 00 48 8b 55 20 4c 89 e6 48 c7 c7 c0 07 f5 8b e8 60 ff bf fc 90 <0f> 0b 90 48 83 c4 18 48 89 d8 5b 5d 41 5c 41 5d 41 5e 41 5f e9 b1 RSP: 0018:ffffc9000d5377b0 EFLAGS: 00010086 RAX: 0000000000000050 RBX: ffff8880347347a8 RCX: ffffffff819a71b9 RDX: 0000000000000000 RSI: ffffffff819af046 RDI: 0000000000000005 RBP: ffff88801f7e3c00 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000002be0 R12: ffffc9000d537a98 R13: ffff88801f7e3c00 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888124aaa000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb0980f000 CR3: 0000000030dfd000 CR4: 0000000000350ef0 Call Trace: <TASK> lookup_object_or_alloc lib/debugobjects.c:665 [inline] __debug_object_init+0x2a9/0x3d0 lib/debugobjects.c:743 __init_work+0x4c/0x60 kernel/workqueue.c:677 rhashtable_init_noprof+0x49f/0x7e0 lib/rhashtable.c:1085 bch2_copygc_thread+0xf6/0xdd0 fs/bcachefs/movinggc.c:355 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at [email protected]. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
