====================================================== WARNING: possible circular locking dependency detected 6.6.95-syzkaller #0 Not tainted ------------------------------------------------------ syz.1.916/8378 is trying to acquire lock: ffff88805906df58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff88805906df58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_del_inode_from_orphan+0x135/0x740 fs/ocfs2/namei.c:2716 but task is already holding lock: ffff88805da122e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2325 [inline] ffff88805da122e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io+0x38c/0x10f0 fs/ocfs2/aops.c:2431 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 ocfs2_create_local_dquot+0x1a4/0x1790 fs/ocfs2/quota_local.c:1224 ocfs2_acquire_dquot+0x7cf/0xaf0 fs/ocfs2/quota_global.c:871 dqget+0x77c/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3ba/0xcb0 fs/quota/dquot.c:1516 ocfs2_get_init_inode+0x13c/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x867/0x20f0 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x196/0x410 fs/ocfs2/namei.c:657 vfs_mkdir+0x296/0x440 fs/namei.c:4113 do_mkdirat+0x1d4/0x440 fs/namei.c:4136 __do_sys_mkdirat fs/namei.c:4151 [inline] __se_sys_mkdirat fs/namei.c:4149 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x129/0xcc0 kernel/locking/mutex.c:747 wait_on_dquot fs/quota/dquot.c:356 [inline] dqget+0x6fc/0xeb0 fs/quota/dquot.c:983 __dquot_initialize+0x3ba/0xcb0 fs/quota/dquot.c:1516 ocfs2_get_init_inode+0x13c/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x867/0x20f0 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x196/0x410 fs/ocfs2/namei.c:657 vfs_mkdir+0x296/0x440 fs/namei.c:4113 do_mkdirat+0x1d4/0x440 fs/namei.c:4136 __do_sys_mkdirat fs/namei.c:4151 [inline] __se_sys_mkdirat fs/namei.c:4149 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}: down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ocfs2_evict_inode+0x1313/0x3e60 fs/ocfs2/inode.c:1216 evict+0x486/0x870 fs/inode.c:705 d_delete_notify include/linux/fsnotify.h:269 [inline] vfs_rmdir+0x39b/0x4d0 fs/namei.c:4209 do_rmdir+0x29e/0x5c0 fs/namei.c:4255 __do_sys_rmdir fs/namei.c:4274 [inline] __se_sys_rmdir fs/namei.c:4272 [inline] __x64_sys_rmdir+0x49/0x50 fs/namei.c:4272 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_del_inode_from_orphan+0x135/0x740 fs/ocfs2/namei.c:2716 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline] ocfs2_dio_end_io+0x47b/0x10f0 fs/ocfs2/aops.c:2431 dio_complete+0x254/0x710 fs/direct-io.c:282 __blockdev_direct_IO+0x2dc8/0x3420 fs/direct-io.c:1308 ocfs2_direct_IO+0x240/0x2b0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x1d4/0x3e0 mm/filemap.c:3941 __generic_file_write_iter+0x11b/0x230 mm/filemap.c:4097 ocfs2_file_write_iter+0x1582/0x1d00 fs/ocfs2/file.c:2468 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x79a/0xc70 fs/read_write.c:860 iter_file_splice_write+0x66f/0xc50 fs/splice.c:736 do_splice_from fs/splice.c:933 [inline] direct_splice_actor+0xe8/0x130 fs/splice.c:1142 splice_direct_to_actor+0x2f0/0x870 fs/splice.c:1088 do_splice_direct+0x1b7/0x2c0 fs/splice.c:1194 do_sendfile+0x5dc/0xf70 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64+0x13f/0x190 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type] --> &dquot->dq_lock --> &ocfs2_quota_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_quota_ip_alloc_sem_key); lock(&dquot->dq_lock); lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]); *** DEADLOCK *** 3 locks held by syz.1.916/8378: #0: ffff8880215d8418 (sb_writers#24){.+.+}-{0:0}, at: do_sendfile+0x5b9/0xf70 fs/read_write.c:1253 #1: ffff88805da12658 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88805da12658 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x40b/0x1d00 fs/ocfs2/file.c:2398 #2: ffff88805da122e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2325 [inline] #2: ffff88805da122e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io+0x38c/0x10f0 fs/ocfs2/aops.c:2431 stack backtrace: CPU: 0 PID: 8378 Comm: syz.1.916 Not tainted 6.6.95-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_del_inode_from_orphan+0x135/0x740 fs/ocfs2/namei.c:2716 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline] ocfs2_dio_end_io+0x47b/0x10f0 fs/ocfs2/aops.c:2431 dio_complete+0x254/0x710 fs/direct-io.c:282 __blockdev_direct_IO+0x2dc8/0x3420 fs/direct-io.c:1308 ocfs2_direct_IO+0x240/0x2b0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x1d4/0x3e0 mm/filemap.c:3941 __generic_file_write_iter+0x11b/0x230 mm/filemap.c:4097 ocfs2_file_write_iter+0x1582/0x1d00 fs/ocfs2/file.c:2468 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x79a/0xc70 fs/read_write.c:860 iter_file_splice_write+0x66f/0xc50 fs/splice.c:736 do_splice_from fs/splice.c:933 [inline] direct_splice_actor+0xe8/0x130 fs/splice.c:1142 splice_direct_to_actor+0x2f0/0x870 fs/splice.c:1088 do_splice_direct+0x1b7/0x2c0 fs/splice.c:1194 do_sendfile+0x5dc/0xf70 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64+0x13f/0x190 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f84ed78e929 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:00007f84ee606038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f84ed9b5fa0 RCX: 00007f84ed78e929 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007f84ed810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000fffe82 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f84ed9b5fa0 R15: 00007ffca9383828 syz.1.916 (8378) used greatest stack depth: 18288 bytes left