Hello, syzbot found the following issue on: HEAD commit: a92b7d26c743 Merge tag 'drm-fixes-2023-06-23' of git://ano.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1446e8e0a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=e74b395fe4978721 dashboard link: https://syzkaller.appspot.com/bug?extid=afec8fb60a29eee6de33 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/51be0f38ba27/disk-a92b7d26.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b31a945d3cb5/vmlinux-a92b7d26.xz kernel image: https://storage.googleapis.com/syzbot-assets/f0b145c24307/bzImage-a92b7d26.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+afec8fb60a29eee6de33@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ kernel BUG at fs/inode.c:1763! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5767 Comm: btrfs-cleaner Not tainted 6.4.0-rc7-syzkaller-00226-ga92b7d26c743 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:iput+0x8e8/0x8f0 fs/inode.c:1763 Code: e8 ff e9 b5 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 46 fe ff ff 4c 89 e7 e8 c2 ec e8 ff e9 39 fe ff ff e8 c8 09 91 ff <0f> 0b 66 0f 1f 44 00 00 f3 0f 1e fa 55 41 57 41 56 53 48 89 f5 48 RSP: 0018:ffffc90015e37c70 EFLAGS: 00010293 RAX: ffffffff81fa7b28 RBX: 0000000000000040 RCX: ffff8880290cd940 RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000 RBP: ffff888075690448 R08: ffffffff81fa72a3 R09: fffffbfff1cabba6 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8880214be130 R14: 0000000000000005 R15: ffff8880214be108 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4c3eb6dd50 CR3: 000000002cd46000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __btrfs_run_defrag_inode fs/btrfs/defrag.c:282 [inline] btrfs_run_defrag_inodes+0xa90/0xe20 fs/btrfs/defrag.c:328 cleaner_kthread+0x287/0x3c0 fs/btrfs/disk-io.c:1739 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:iput+0x8e8/0x8f0 fs/inode.c:1763 Code: e8 ff e9 b5 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 46 fe ff ff 4c 89 e7 e8 c2 ec e8 ff e9 39 fe ff ff e8 c8 09 91 ff <0f> 0b 66 0f 1f 44 00 00 f3 0f 1e fa 55 41 57 41 56 53 48 89 f5 48 RSP: 0018:ffffc90015e37c70 EFLAGS: 00010293 RAX: ffffffff81fa7b28 RBX: 0000000000000040 RCX: ffff8880290cd940 RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000 RBP: ffff888075690448 R08: ffffffff81fa72a3 R09: fffffbfff1cabba6 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8880214be130 R14: 0000000000000005 R15: ffff8880214be108 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c02af7e000 CR3: 0000000036a4b000 CR4: 00000000003506e0 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 syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
