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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 176e917e010c Add linux-next specific files for 20250523 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13d555f4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e7902c752bef748 dashboard link: https://syzkaller.appspot.com/bug?extid=bcc38a9556d0324c2ec2 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=145948e8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13d6a170580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5f7692c642fa/disk-176e917e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/057a442d42d0/vmlinux-176e917e.xz kernel image: https://storage.googleapis.com/syzbot-assets/8f8ebdb4dd96/bzImage-176e917e.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/d3d310848021/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bcc38a9556d0324c2ec2@syzkaller.appspotmail.com ODEBUG: object ffffc9000469fb90 is on stack ffffc90004698000, but NOT annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5924 at lib/debugobjects.c:655 debug_object_is_on_stack lib/debugobjects.c:655 [inline] WARNING: CPU: 1 PID: 5924 at lib/debugobjects.c:655 lookup_object_or_alloc lib/debugobjects.c:688 [inline] WARNING: CPU: 1 PID: 5924 at lib/debugobjects.c:655 __debug_object_init+0x2c9/0x3c0 lib/debugobjects.c:743 Modules linked in: CPU: 1 UID: 0 PID: 5924 Comm: bch-copygc/loop Not tainted 6.15.0-rc7-next-20250523-syzkaller #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 lib/debugobjects.c:688 [inline] RIP: 0010:__debug_object_init+0x2c9/0x3c0 lib/debugobjects.c:743 Code: cc cc cc 41 ff c7 44 89 3d a4 18 14 15 48 c7 c1 80 9b e2 8b 48 c7 c7 e0 9b e2 8b 84 c0 48 0f 45 f9 48 89 de e8 48 2b 61 fc 90 <0f> 0b 90 e9 c0 fe ff ff e8 3a 1c 00 00 8b 05 1c 9c c6 09 3b 05 1a RSP: 0018:ffffc9000469f6e0 EFLAGS: 00010046 RAX: 0000000000000050 RBX: ffffc9000469fb90 RCX: 0aa01120dfd08500 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffff88802f5c9e20 R08: ffffc9000469f3c7 R09: 1ffff920008d3e78 R10: dffffc0000000000 R11: fffff520008d3e79 R12: 0000000000000040 R13: ffff8880771e5d20 R14: dffffc0000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125d56000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1c5ee80000 CR3: 0000000077540000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rhashtable_init_noprof+0x7c0/0xbb0 lib/rhashtable.c:1085 bch2_copygc_thread+0x116/0xdc0 fs/bcachefs/movinggc.c:355 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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 syzkaller@googlegroups.com. 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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