Hello, syzbot found the following issue on:
HEAD commit: c964ced77262 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=17f10240580000 kernel config: https://syzkaller.appspot.com/x/.config?x=164d2822debd8b0d dashboard link: https://syzkaller.appspot.com/bug?extid=4deac4f47f33e16f82b7 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10090240580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=113be830580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fb46e19c1a07/disk-c964ced7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/521abb58e739/vmlinux-c964ced7.xz kernel image: https://storage.googleapis.com/syzbot-assets/ea079e4ac77f/bzImage-c964ced7.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/f2414169f0cc/mount_0.gz The issue was bisected to: commit bf4baaa087e2be0279991f1dbf9acaa7a4c9148c Author: Kent Overstreet <[email protected]> Date: Sat Oct 5 21:37:02 2024 +0000 bcachefs: Fix lockdep splat in bch2_accounting_read bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=166b0487980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=156b0487980000 console output: https://syzkaller.appspot.com/x/log.txt?x=116b0487980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] Fixes: bf4baaa087e2 ("bcachefs: Fix lockdep splat in bch2_accounting_read") ------------[ cut here ]------------ kernel BUG at fs/bcachefs/btree_cache.c:594! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 5223 Comm: syz-executor386 Not tainted 6.12.0-rc3-syzkaller-00087-gc964ced77262 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:bch2_fs_btree_cache_exit+0x1124/0x1130 fs/bcachefs/btree_cache.c:593 Code: fd 90 0f 0b e8 dd 66 84 fd 90 0f 0b e8 d5 66 84 fd 90 0f 0b e8 cd 66 84 fd 90 0f 0b e8 c5 66 84 fd 90 0f 0b e8 bd 66 84 fd 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003b37b20 EFLAGS: 00010293 RAX: ffffffff84108043 RBX: 0000000000000002 RCX: ffff888024728000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 1ffff11005c49016 R08: ffffffff841076e7 R09: 1ffff1100bc503b6 R10: dffffc0000000000 R11: ffffed100bc503b7 R12: ffff88805e281c78 R13: ffff88805e280000 R14: 0000000000000000 R15: dffffc0000000000 FS: 000055558a7d6380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc6ecbff000 CR3: 0000000074002000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __bch2_fs_free fs/bcachefs/super.c:556 [inline] bch2_fs_release+0x20e/0x7d0 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+0x22f/0x480 lib/kobject.c:737 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:228 ptrace_notify+0x2d2/0x380 kernel/signal.c:2403 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x279/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc6f42275f7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffdf9e61628 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc6f42275f7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdf9e616e0 RBP: 00007ffdf9e616e0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffdf9e62750 R13: 000055558a7d76c0 R14: 431bde82d7b634db R15: 00007ffdf9e62770 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bch2_fs_btree_cache_exit+0x1124/0x1130 fs/bcachefs/btree_cache.c:593 Code: fd 90 0f 0b e8 dd 66 84 fd 90 0f 0b e8 d5 66 84 fd 90 0f 0b e8 cd 66 84 fd 90 0f 0b e8 c5 66 84 fd 90 0f 0b e8 bd 66 84 fd 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003b37b20 EFLAGS: 00010293 RAX: ffffffff84108043 RBX: 0000000000000002 RCX: ffff888024728000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 1ffff11005c49016 R08: ffffffff841076e7 R09: 1ffff1100bc503b6 R10: dffffc0000000000 R11: ffffed100bc503b7 R12: ffff88805e281c78 R13: ffff88805e280000 R14: 0000000000000000 R15: dffffc0000000000 FS: 000055558a7d6380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc6ecbff000 CR3: 0000000074002000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
