BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed ============================================ WARNING: possible recursive locking detected 4.19.211-syzkaller #0 Not tainted -------------------------------------------- syz-executor.1/14549 is trying to acquire lock: 0000000055431439 (&type->i_mutex_dir_key#11){++++}, at: inode_lock include/linux/fs.h:748 [inline] 0000000055431439 (&type->i_mutex_dir_key#11){++++}, at: fuse_reverse_inval_entry+0x2e1/0x660 fs/fuse/dir.c:1006 but task is already holding lock: 00000000c6014c5e (&type->i_mutex_dir_key#11){++++}, at: inode_lock include/linux/fs.h:748 [inline] 00000000c6014c5e (&type->i_mutex_dir_key#11){++++}, at: fuse_reverse_inval_entry+0xaa/0x660 fs/fuse/dir.c:987 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&type->i_mutex_dir_key#11); lock(&type->i_mutex_dir_key#11); *** DEADLOCK *** May be due to missing lock nesting notation 2 locks held by syz-executor.1/14549: #0: 000000003ef84fb6 (&fc->killsb){++++}, at: fuse_notify_delete fs/fuse/dev.c:1582 [inline] #0: 000000003ef84fb6 (&fc->killsb){++++}, at: fuse_notify fs/fuse/dev.c:1819 [inline] #0: 000000003ef84fb6 (&fc->killsb){++++}, at: fuse_dev_do_write+0x2343/0x2bc0 fs/fuse/dev.c:1894 #1: 00000000c6014c5e (&type->i_mutex_dir_key#11){++++}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000c6014c5e (&type->i_mutex_dir_key#11){++++}, at: fuse_reverse_inval_entry+0xaa/0x660 fs/fuse/dir.c:987 stack backtrace: CPU: 1 PID: 14549 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_deadlock_bug kernel/locking/lockdep.c:1764 [inline] check_deadlock kernel/locking/lockdep.c:1808 [inline] validate_chain kernel/locking/lockdep.c:2404 [inline] __lock_acquire.cold+0x121/0x57e kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 down_write+0x34/0x90 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:748 [inline] fuse_reverse_inval_entry+0x2e1/0x660 fs/fuse/dir.c:1006 fuse_notify_delete fs/fuse/dev.c:1585 [inline] fuse_notify fs/fuse/dev.c:1819 [inline] fuse_dev_do_write+0x239e/0x2bc0 fs/fuse/dev.c:1894 fuse_dev_write+0x153/0x1e0 fs/fuse/dev.c:1978 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f45675545a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4565ac7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f4567674f80 RCX: 00007f45675545a9 RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007f45675af7b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9a7e17af R14: 00007f4565ac7300 R15: 0000000000022000 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS: device fsid 488337a4-759c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS: device fsid 4c8337a4-759c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch IPVS: ftp: loaded support on port[0] = 21 BTRFS error (device loop2): open_ctree failed BTRFS: device fsid 7a8337a4-759c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch audit: type=1800 audit(1667271628.401:463): pid=14986 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.3" name="SYSV00000000" dev="hugetlbfs" ino=917519 res=0 BTRFS error (device loop2): open_ctree failed audit: type=1800 audit(1667271628.551:464): pid=15003 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.3" name="SYSV00000000" dev="hugetlbfs" ino=1048596 res=0 BTRFS: device fsid 16830aa4-759c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed audit: type=1800 audit(1667271628.761:465): pid=15019 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.3" name="SYSV00000000" dev="hugetlbfs" ino=1146903 res=0 BTRFS: device fsid 16834ca4-759c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed audit: type=1800 audit(1667271628.881:466): pid=15032 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.4" name="SYSV00000000" dev="hugetlbfs" ino=720910 res=0 audit: type=1800 audit(1667271628.891:467): pid=15029 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=1409047 res=0 BTRFS: device fsid 168337a4-0a9c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 audit: type=1800 audit(1667271629.351:468): pid=15044 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.3" name="SYSV00000000" dev="hugetlbfs" ino=1245210 res=0 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch audit: type=1800 audit(1667271629.381:469): pid=15048 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.4" name="SYSV00000000" dev="hugetlbfs" ino=851987 res=0 BTRFS error (device loop2): open_ctree failed audit: type=1800 audit(1667271629.481:470): pid=15058 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=1507355 res=0 BTRFS: device fsid 168337a4-239c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 audit: type=1800 audit(1667271629.551:471): pid=15067 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.4" name="SYSV00000000" dev="hugetlbfs" ino=950294 res=0 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch netlink: 72 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 72 bytes leftover after parsing attributes in process `syz-executor.1'. BTRFS error (device loop2): open_ctree failed audit: type=1800 audit(1667271629.671:472): pid=15073 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.0" name="SYSV00000000" dev="hugetlbfs" ino=1605662 res=0 BTRFS: device fsid 168337a4-259c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed BTRFS: device fsid 168337a4-2a9c-4b32-8cbb-32a39de5f6ac devid 1 transid 8 /dev/loop2 BTRFS error (device loop2): unsupported checksum algorithm 2 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed