====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.2197/17842 is trying to acquire lock: ffff8880771cc2d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff8880771cc2d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_del_inode_from_orphan+0x12f/0x7a0 fs/ocfs2/namei.c:2716 but task is already holding lock: ffff8880771dea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2325 [inline] ffff8880771dea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io+0x43a/0x1200 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+0x97/0x200 kernel/locking/rwsem.c:1573 ocfs2_create_local_dquot+0x1a9/0x18f0 fs/ocfs2/quota_local.c:1224 ocfs2_acquire_dquot+0x7f1/0xb10 fs/ocfs2/quota_global.c:871 dqget+0x77c/0xeb0 fs/quota/dquot.c:990 __dquot_initialize+0x3c7/0xcd0 fs/quota/dquot.c:1518 ocfs2_get_init_inode+0x148/0x1c0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x867/0x2300 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x196/0x430 fs/ocfs2/namei.c:657 vfs_mkdir+0x296/0x440 fs/namei.c:4121 do_mkdirat+0x1dc/0x450 fs/namei.c:4144 __do_sys_mkdirat fs/namei.c:4159 [inline] __se_sys_mkdirat fs/namei.c:4157 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x136/0xcc0 kernel/locking/mutex.c:747 wait_on_dquot fs/quota/dquot.c:358 [inline] dqget+0x6fc/0xeb0 fs/quota/dquot.c:985 __dquot_initialize+0x3c7/0xcd0 fs/quota/dquot.c:1518 ocfs2_get_init_inode+0x148/0x1c0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x867/0x2300 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x196/0x430 fs/ocfs2/namei.c:657 vfs_mkdir+0x296/0x440 fs/namei.c:4121 do_mkdirat+0x1dc/0x450 fs/namei.c:4144 __do_sys_mkdirat fs/namei.c:4159 [inline] __se_sys_mkdirat fs/namei.c:4157 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}: down_write+0x97/0x200 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+0x1d84/0x41e0 fs/ocfs2/inode.c:1219 evict+0x4ca/0x8d0 fs/inode.c:705 ocfs2_dentry_iput+0x24e/0x390 fs/ocfs2/dcache.c:418 __dentry_kill+0x431/0x650 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 do_renameat2+0x8f9/0xce0 fs/namei.c:5035 __do_sys_renameat2 fs/namei.c:5066 [inline] __se_sys_renameat2 fs/namei.c:5063 [inline] __x64_sys_renameat2+0xd2/0xe0 fs/namei.c:5063 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_del_inode_from_orphan+0x12f/0x7a0 fs/ocfs2/namei.c:2716 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline] ocfs2_dio_end_io+0x546/0x1200 fs/ocfs2/aops.c:2431 dio_complete+0x254/0x710 fs/direct-io.c:282 __blockdev_direct_IO+0x2ea8/0x3500 fs/direct-io.c:1308 ocfs2_direct_IO+0x235/0x2a0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x1d4/0x3e0 mm/filemap.c:3956 __generic_file_write_iter+0x11b/0x230 mm/filemap.c:4112 ocfs2_file_write_iter+0x167a/0x1e80 fs/ocfs2/file.c:2468 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x738/0xc30 fs/read_write.c:860 vfs_writev fs/read_write.c:933 [inline] do_writev+0x27f/0x480 fs/read_write.c:976 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 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 *** 4 locks held by syz.0.2197/17842: #0: ffff888019a9e348 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2a3/0x330 fs/file.c:1040 #1: ffff88805cde0418 (sb_writers#31){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:932 [inline] #1: ffff88805cde0418 (sb_writers#31){.+.+}-{0:0}, at: do_writev+0x261/0x480 fs/read_write.c:976 #2: ffff8880771ded98 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #2: ffff8880771ded98 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x440/0x1e80 fs/ocfs2/file.c:2398 #3: ffff8880771dea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2325 [inline] #3: ffff8880771dea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io+0x43a/0x1200 fs/ocfs2/aops.c:2431 stack backtrace: CPU: 0 PID: 17842 Comm: syz.0.2197 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 check_noncircular+0x2fc/0x400 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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_del_inode_from_orphan+0x12f/0x7a0 fs/ocfs2/namei.c:2716 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline] ocfs2_dio_end_io+0x546/0x1200 fs/ocfs2/aops.c:2431 dio_complete+0x254/0x710 fs/direct-io.c:282 __blockdev_direct_IO+0x2ea8/0x3500 fs/direct-io.c:1308 ocfs2_direct_IO+0x235/0x2a0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x1d4/0x3e0 mm/filemap.c:3956 __generic_file_write_iter+0x11b/0x230 mm/filemap.c:4112 ocfs2_file_write_iter+0x167a/0x1e80 fs/ocfs2/file.c:2468 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x738/0xc30 fs/read_write.c:860 vfs_writev fs/read_write.c:933 [inline] do_writev+0x27f/0x480 fs/read_write.c:976 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f3a6739aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3a681d3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f3a67615fa0 RCX: 00007f3a6739aeb9 RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000005 RBP: 00007f3a67408c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3a67616038 R14: 00007f3a67615fa0 R15: 00007ffe40b43db8