====================================================== WARNING: possible circular locking dependency detected 5.15.185-syzkaller #0 Not tainted ------------------------------------------------------ syz.2.1848/11130 is trying to acquire lock: ffff888079821488 (&osb->system_file_mutex){+.+.}-{3:3}, at: ocfs2_get_system_file_inode+0x1b5/0x760 fs/ocfs2/sysfile.c:101 but task is already holding lock: ffff88805e18b120 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_wr_get_block+0x8db/0x17a0 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}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x23f/0x8a0 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+0x3d1/0x1f90 fs/ocfs2/dir.c:1091 ocfs2_find_files_on_disk+0xdb/0x2f0 fs/ocfs2/dir.c:1995 ocfs2_lookup_ino_from_name+0x4f/0xf0 fs/ocfs2/dir.c:2017 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x319/0x760 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x316/0x650 fs/ocfs2/super.c:458 ocfs2_initialize_super fs/ocfs2/super.c:2279 [inline] ocfs2_fill_super+0x3dbf/0x4d80 fs/ocfs2/super.c:995 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3010 do_mount fs/namespace.c:3353 [inline] __do_sys_mount fs/namespace.c:3561 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3538 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&osb->system_file_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ocfs2_get_system_file_inode+0x1b5/0x760 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x139/0x4350 fs/ocfs2/suballoc.c:776 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1128 [inline] ocfs2_reserve_clusters_with_limit+0x2f8/0xba0 fs/ocfs2/suballoc.c:1173 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x2f7/0x5b0 fs/ocfs2/suballoc.c:2669 ocfs2_write_begin_nolock+0x2216/0x4180 fs/ocfs2/aops.c:1741 ocfs2_dio_wr_get_block+0xb6d/0x17a0 fs/ocfs2/aops.c:2239 get_more_blocks fs/direct-io.c:673 [inline] do_direct_IO fs/direct-io.c:959 [inline] do_blockdev_direct_IO fs/direct-io.c:1276 [inline] __blockdev_direct_IO+0x146d/0x3c90 fs/direct-io.c:1368 ocfs2_direct_IO+0x23e/0x2b0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x22c/0x490 mm/filemap.c:3687 __generic_file_write_iter+0x2b1/0x4e0 mm/filemap.c:3869 ocfs2_file_write_iter+0x1578/0x1cf0 fs/ocfs2/file.c:2472 do_iter_readv_writev+0x497/0x600 fs/read_write.c:-1 do_iter_write+0x205/0x7b0 fs/read_write.c:855 iter_file_splice_write+0x65f/0xc40 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe1/0x130 fs/splice.c:936 splice_direct_to_actor+0x4dc/0xb50 fs/splice.c:891 do_splice_direct+0x1b9/0x2c0 fs/splice.c:979 do_sendfile+0x5d5/0xec0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 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.2.1848/11130: #0: ffff88802a9b6460 (sb_writers#24){.+.+}-{0:0}, at: do_sendfile+0x5b2/0xec0 fs/read_write.c:1248 #1: ffff88805e18b488 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff88805e18b488 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x401/0x1cf0 fs/ocfs2/file.c:2402 #2: ffff88805e18b120 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_wr_get_block+0x8db/0x17a0 fs/ocfs2/aops.c:2225 stack backtrace: CPU: 1 PID: 11130 Comm: syz.2.1848 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ocfs2_get_system_file_inode+0x1b5/0x760 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x139/0x4350 fs/ocfs2/suballoc.c:776 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1128 [inline] ocfs2_reserve_clusters_with_limit+0x2f8/0xba0 fs/ocfs2/suballoc.c:1173 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x2f7/0x5b0 fs/ocfs2/suballoc.c:2669 ocfs2_write_begin_nolock+0x2216/0x4180 fs/ocfs2/aops.c:1741 ocfs2_dio_wr_get_block+0xb6d/0x17a0 fs/ocfs2/aops.c:2239 get_more_blocks fs/direct-io.c:673 [inline] do_direct_IO fs/direct-io.c:959 [inline] do_blockdev_direct_IO fs/direct-io.c:1276 [inline] __blockdev_direct_IO+0x146d/0x3c90 fs/direct-io.c:1368 ocfs2_direct_IO+0x23e/0x2b0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x22c/0x490 mm/filemap.c:3687 __generic_file_write_iter+0x2b1/0x4e0 mm/filemap.c:3869 ocfs2_file_write_iter+0x1578/0x1cf0 fs/ocfs2/file.c:2472 do_iter_readv_writev+0x497/0x600 fs/read_write.c:-1 do_iter_write+0x205/0x7b0 fs/read_write.c:855 iter_file_splice_write+0x65f/0xc40 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe1/0x130 fs/splice.c:936 splice_direct_to_actor+0x4dc/0xb50 fs/splice.c:891 do_splice_direct+0x1b9/0x2c0 fs/splice.c:979 do_sendfile+0x5d5/0xec0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f0b184f2929 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:00007f0b1635a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f0b18719fa0 RCX: 00007f0b184f2929 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007f0b18574b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0b18719fa0 R15: 00007ffe68ec2308 OCFS2: ERROR (device loop2): int ocfs2_validate_gd_self(struct super_block *, struct buffer_head *, int): Group descriptor #32 has bad signature GR On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. OCFS2: File system is now read-only. (syz.2.1848,11130,1):ocfs2_search_chain:1761 ERROR: status = -30 (syz.2.1848,11130,1):ocfs2_search_chain:1871 ERROR: status = -30 (syz.2.1848,11130,1):ocfs2_claim_suballoc_bits:1940 ERROR: status = -30 (syz.2.1848,11130,1):ocfs2_claim_suballoc_bits:1983 ERROR: status = -30 (syz.2.1848,11130,0):__ocfs2_claim_clusters:2355 ERROR: status = -30 (syz.2.1848,11130,0):__ocfs2_claim_clusters:2363 ERROR: status = -30 (syz.2.1848,11130,0):ocfs2_add_clusters_in_btree:4831 ERROR: status = -30 (syz.2.1848,11130,0):ocfs2_write_cluster:1154 ERROR: status = -30 (syz.2.1848,11130,0):ocfs2_write_cluster_by_desc:1249 ERROR: status = -30 (syz.2.1848,11130,0):ocfs2_write_begin_nolock:1821 ERROR: status = -30 (syz.2.1848,11130,0):ocfs2_dio_wr_get_block:2243 ERROR: status = -30 (syz.2.1848,11130,0):ocfs2_dio_end_io:2428 ERROR: Direct IO failed, bytes = -5