Hello, syzbot found the following issue on: HEAD commit: f03359bca01b Merge tag 'for-6.9-rc6-tag' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14004498980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3310e643b6ef5d69 dashboard link: https://syzkaller.appspot.com/bug?extid=6cf577c8ed4e23fe436b 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/1b4deeb2639b/disk-f03359bc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f3c3d98db8ef/vmlinux-f03359bc.xz kernel image: https://storage.googleapis.com/syzbot-assets/6f79ee1ae20f/bzImage-f03359bc.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6cf577c8ed4e23fe436b@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 1 PID: 32609 at kernel/rcu/srcutree.c:664 cleanup_srcu_struct+0x3d9/0x520 kernel/rcu/srcutree.c:664 Modules linked in: CPU: 1 PID: 32609 Comm: syz-executor.1 Not tainted 6.9.0-rc6-syzkaller-00131-gf03359bca01b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:cleanup_srcu_struct+0x3d9/0x520 kernel/rcu/srcutree.c:664 Code: c6 00 44 0e 8b 48 c7 c7 80 42 0e 8b 48 8b 8d 80 01 00 00 48 83 c4 20 5b 5d 41 5c 41 5d 83 e1 03 41 5e 41 5f e9 08 68 fa ff 90 <0f> 0b 90 eb aa 90 0f 0b 90 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 RSP: 0018:ffffc900033cfcb0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000002 RDX: 1ffff1100f597531 RSI: ffffffff8158f30a RDI: ffffe8fffed21708 RBP: ffff88807acba800 R08: 0000000000000000 R09: 0000000000000008 R10: ffffffff8f9f4fd7 R11: 0000000000000000 R12: ffff8880ae104240 R13: ffff88807acba980 R14: ffff88807acba988 R15: ffffed1015c20849 FS: 000055556f23f480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3b36579198 CR3: 000000002c59c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> bch2_fs_btree_iter_exit+0x46e/0x630 fs/bcachefs/btree_iter.c:3279 __bch2_fs_free fs/bcachefs/super.c:562 [inline] bch2_fs_release+0xfb/0x670 fs/bcachefs/super.c:610 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1fa/0x5b0 lib/kobject.c:737 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f671907f057 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fffcd284548 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f671907f057 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffcd284600 RBP: 00007fffcd284600 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffcd2856c0 R13: 00007f67190c93b9 R14: 00000000001e28e3 R15: 0000000000000003 </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 syzkaller@xxxxxxxxxxxxxxxx. 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
