====================================================== WARNING: possible circular locking dependency detected 6.1.115-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor368/4368 is trying to acquire lock: ffff8880738e5488 (&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: ffff8880723f22e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_write_begin+0x1cd/0x390 fs/ocfs2/aops.c:1902 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_write_begin_nolock+0x271a/0x4e40 fs/ocfs2/aops.c:1740 ocfs2_write_begin+0x201/0x390 fs/ocfs2/aops.c:1904 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3845 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3973 ocfs2_file_write_iter+0x17c6/0x2020 fs/ocfs2/file.c:2456 do_iter_write+0x6e6/0xc40 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_writev+0x27b/0x460 fs/read_write.c:977 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-executor368/4368: #0: ffff888030b7a460 (sb_writers#9){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:933 [inline] #0: ffff888030b7a460 (sb_writers#9){.+.+}-{0:0}, at: do_writev+0x267/0x460 fs/read_write.c:977 #1: ffff8880723f2648 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff8880723f2648 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x476/0x2020 fs/ocfs2/file.c:2388 #2: ffff8880723f22e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_write_begin+0x1cd/0x390 fs/ocfs2/aops.c:1902 stack backtrace: CPU: 1 PID: 4368 Comm: syz-executor368 Not tainted 6.1.115-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_write_begin_nolock+0x271a/0x4e40 fs/ocfs2/aops.c:1740 ocfs2_write_begin+0x201/0x390 fs/ocfs2/aops.c:1904 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3845 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3973 ocfs2_file_write_iter+0x17c6/0x2020 fs/ocfs2/file.c:2456 do_iter_write+0x6e6/0xc40 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_writev+0x27b/0x460 fs/read_write.c:977 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: 0033:0x7f0c8719a1a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 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:00007ffee0e26a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f0c8719a1a9 RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 0000000000000004 R08: 00000000000008c0 R09: 00000000000008c0 R10: 00000000000008c0 R11: 0000000000000246 R12: 00007ffee0e26aa0 R13: 00007ffee0e26ae0 R14: 0000000001000000 R15: 0000000000000003