loop7: detected capacity change from 0 to 32768 ocfs2: Mounting device (7,7) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.1.114-syzkaller #0 Not tainted ------------------------------------------------------ syz.7.808/8286 is trying to acquire lock: ffff88806819d488 (&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: ffff88807b5222e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x7f6/0xf60 fs/ocfs2/file.c:2004 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_local_alloc_bits+0xfe/0x29d0 fs/ocfs2/localalloc.c:626 ocfs2_reserve_clusters_with_limit+0x1b4/0xb50 fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x306/0x620 fs/ocfs2/suballoc.c:2669 ocfs2_extend_allocation+0x4e5/0x1d00 fs/ocfs2/file.c:585 ocfs2_allocate_unwritten_extents+0x394/0x9e0 fs/ocfs2/file.c:1493 __ocfs2_change_file_space+0x8ce/0xf60 fs/ocfs2/file.c:2012 ocfs2_fallocate+0x2dc/0x350 fs/ocfs2/file.c:2127 vfs_fallocate+0x547/0x6b0 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 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.7.808/8286: #0: ffff88802755c460 (sb_writers#20){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3015 [inline] #0: ffff88802755c460 (sb_writers#20){.+.+}-{0:0}, at: vfs_fallocate+0x4ba/0x6b0 fs/open.c:322 #1: ffff88807b522648 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff88807b522648 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: __ocfs2_change_file_space+0x1fe/0xf60 fs/ocfs2/file.c:1938 #2: ffff88807b5222e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x7f6/0xf60 fs/ocfs2/file.c:2004 stack backtrace: CPU: 0 PID: 8286 Comm: syz.7.808 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_local_alloc_bits+0xfe/0x29d0 fs/ocfs2/localalloc.c:626 ocfs2_reserve_clusters_with_limit+0x1b4/0xb50 fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x306/0x620 fs/ocfs2/suballoc.c:2669 ocfs2_extend_allocation+0x4e5/0x1d00 fs/ocfs2/file.c:585 ocfs2_allocate_unwritten_extents+0x394/0x9e0 fs/ocfs2/file.c:1493 __ocfs2_change_file_space+0x8ce/0xf60 fs/ocfs2/file.c:2012 ocfs2_fallocate+0x2dc/0x350 fs/ocfs2/file.c:2127 vfs_fallocate+0x547/0x6b0 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 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: 0033:0x7ffa7f37e719 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:00007ffa80171038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007ffa7f535f80 RCX: 00007ffa7f37e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007ffa7f3f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffa7f535f80 R15: 00007ffc93101f58