ocfs2: Mounting device (7,7) on (node local, slot 0) with writeback data mode. ====================================================== WARNING: possible circular locking dependency detected 6.1.114-syzkaller #0 Not tainted ------------------------------------------------------ syz.7.354/6350 is trying to acquire lock: ffff88807b3f1488 (&osb->system_file_mutex){+.+.}-{3:3}, at: ocfs2_get_system_file_inode+0x1a1/0x7b0 fs/ocfs2/sysfile.c:101 but task is already holding lock: ffff88807007ea20 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_wr_get_block+0x942/0x1920 fs/ocfs2/aops.c:2225 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_read+0xad/0xa30 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x2dc/0xab0 fs/ocfs2/extent_map.c:976 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x436/0x28c0 fs/ocfs2/dir.c:1080 ocfs2_find_files_on_disk+0x10d/0x3a0 fs/ocfs2/dir.c:1982 ocfs2_lookup_ino_from_name+0xad/0x1e0 fs/ocfs2/dir.c:2004 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x314/0x7b0 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x328/0x720 fs/ocfs2/super.c:457 ocfs2_initialize_super fs/ocfs2/super.c:2250 [inline] ocfs2_fill_super+0x2f82/0x5730 fs/ocfs2/super.c:994 mount_bdev+0x2c9/0x3f0 fs/super.c:1443 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x2ba/0xb40 fs/namespace.c:3056 do_mount fs/namespace.c:3399 [inline] __do_sys_mount fs/namespace.c:3607 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3584 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&osb->system_file_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x132/0xd80 kernel/locking/mutex.c:747 ocfs2_get_system_file_inode+0x1a1/0x7b0 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x167/0x5190 fs/ocfs2/suballoc.c:776 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1128 [inline] ocfs2_reserve_clusters_with_limit+0x3d9/0xb50 fs/ocfs2/suballoc.c:1173 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x306/0x620 fs/ocfs2/suballoc.c:2669 ocfs2_write_begin_nolock+0x271a/0x4e40 fs/ocfs2/aops.c:1740 ocfs2_dio_wr_get_block+0xc29/0x1920 fs/ocfs2/aops.c:2239 get_more_blocks fs/direct-io.c:665 [inline] do_direct_IO fs/direct-io.c:953 [inline] __blockdev_direct_IO+0x1d00/0x4810 fs/direct-io.c:1266 ocfs2_direct_IO+0x250/0x2c0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x204/0x460 mm/filemap.c:3769 __generic_file_write_iter+0x1c4/0x400 mm/filemap.c:3929 ocfs2_file_write_iter+0x17c6/0x2020 fs/ocfs2/file.c:2456 do_iter_write+0x6e6/0xc40 fs/read_write.c:861 iter_file_splice_write+0x830/0xfc0 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:950 splice_direct_to_actor+0x4c7/0xc30 fs/splice.c:896 do_splice_direct+0x2a5/0x3e0 fs/splice.c:1002 do_sendfile+0x619/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&osb->system_file_mutex); lock(&ocfs2_file_ip_alloc_sem_key); lock(&osb->system_file_mutex); *** DEADLOCK *** 3 locks held by syz.7.354/6350: #0: ffff88802ced4460 (sb_writers#13){.+.+}-{0:0}, at: do_sendfile+0x5f4/0xff0 fs/read_write.c:1254 #1: ffff88807007ed88 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff88807007ed88 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x476/0x2020 fs/ocfs2/file.c:2388 #2: ffff88807007ea20 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_wr_get_block+0x942/0x1920 fs/ocfs2/aops.c:2225 stack backtrace: CPU: 1 PID: 6350 Comm: syz.7.354 Not tainted 6.1.114-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x132/0xd80 kernel/locking/mutex.c:747 ocfs2_get_system_file_inode+0x1a1/0x7b0 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x167/0x5190 fs/ocfs2/suballoc.c:776 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1128 [inline] ocfs2_reserve_clusters_with_limit+0x3d9/0xb50 fs/ocfs2/suballoc.c:1173 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x306/0x620 fs/ocfs2/suballoc.c:2669 ocfs2_write_begin_nolock+0x271a/0x4e40 fs/ocfs2/aops.c:1740 ocfs2_dio_wr_get_block+0xc29/0x1920 fs/ocfs2/aops.c:2239 get_more_blocks fs/direct-io.c:665 [inline] do_direct_IO fs/direct-io.c:953 [inline] __blockdev_direct_IO+0x1d00/0x4810 fs/direct-io.c:1266 ocfs2_direct_IO+0x250/0x2c0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x204/0x460 mm/filemap.c:3769 __generic_file_write_iter+0x1c4/0x400 mm/filemap.c:3929 ocfs2_file_write_iter+0x17c6/0x2020 fs/ocfs2/file.c:2456 do_iter_write+0x6e6/0xc40 fs/read_write.c:861 iter_file_splice_write+0x830/0xfc0 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:950 splice_direct_to_actor+0x4c7/0xc30 fs/splice.c:896 do_splice_direct+0x2a5/0x3e0 fs/splice.c:1002 do_sendfile+0x619/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f91e257e719 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f91e32f7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f91e2735f80 RCX: 00007f91e257e719 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005 RBP: 00007f91e25f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f91e2735f80 R15: 00007ffc0cce58f8 (syz.7.354,6350,0):ocfs2_dio_end_io:2428 ERROR: Direct IO failed, bytes = -12 ocfs2: Unmounting device (7,7) on (node local) syz.7.354 (6350) used greatest stack depth: 17240 bytes left