====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.358/5821 is trying to acquire lock: ffff88801cb32990 (jbd2_handle){++++}-{0:0}, at: wait_transaction_locked+0x19f/0x270 fs/jbd2/transaction.c:178 but task is already holding lock: ffff88805f9a2ce8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 ocfs2_mknod+0xf34/0x2460 fs/ocfs2/namei.c:361 ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:659 vfs_mkdir+0x386/0x570 fs/namei.c:4116 do_mkdirat+0x1dd/0x5c0 fs/namei.c:4141 __do_sys_mkdirat fs/namei.c:4156 [inline] __se_sys_mkdirat fs/namei.c:4154 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4154 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 -> #4 (sb_internal#3){.+.+}-{0:0} : percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1817 [inline] sb_start_intwrite include/linux/fs.h:1934 [inline] ocfs2_start_trans+0x2a7/0x6f0 fs/ocfs2/journal.c:372 ocfs2_acquire_dquot+0x6c0/0xb30 fs/ocfs2/quota_global.c:848 dqget+0x713/0xbb0 fs/quota/dquot.c:1010 __dquot_initialize+0x3a9/0xd00 fs/quota/dquot.c:1539 ocfs2_get_init_inode+0x144/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x90e/0x2460 fs/ocfs2/namei.c:311 ocfs2_create+0x192/0x420 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:3513 [inline] open_last_lookups fs/namei.c:3583 [inline] path_openat+0x120a/0x2fb0 fs/namei.c:3790 do_filp_open+0x1df/0x400 fs/namei.c:3820 do_sys_openat2+0x14b/0x500 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_open fs/open.c:1279 [inline] __se_sys_open fs/open.c:1275 [inline] __x64_sys_open+0x11b/0x140 fs/open.c:1275 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 -> #3 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ocfs2_create_local_dquot+0x199/0x18d0 fs/ocfs2/quota_local.c:1224 ocfs2_acquire_dquot+0x822/0xb30 fs/ocfs2/quota_global.c:871 dqget+0x713/0xbb0 fs/quota/dquot.c:1010 __dquot_initialize+0x3a9/0xd00 fs/quota/dquot.c:1539 ocfs2_get_init_inode+0x144/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x90e/0x2460 fs/ocfs2/namei.c:311 ocfs2_create+0x192/0x420 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:3513 [inline] open_last_lookups fs/namei.c:3583 [inline] path_openat+0x120a/0x2fb0 fs/namei.c:3790 do_filp_open+0x1df/0x400 fs/namei.c:3820 do_sys_openat2+0x14b/0x500 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_open fs/open.c:1279 [inline] __se_sys_open fs/open.c:1275 [inline] __x64_sys_open+0x11b/0x140 fs/open.c:1275 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 -> #2 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common+0x1e5/0x2400 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 dquot_commit+0x5a/0x410 fs/quota/dquot.c:532 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6212 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:437 __dquot_alloc_space+0x5cb/0xe10 fs/quota/dquot.c:1774 dquot_alloc_space_nodirty include/linux/quotaops.h:290 [inline] dquot_alloc_space include/linux/quotaops.h:303 [inline] dquot_alloc_block include/linux/quotaops.h:327 [inline] ext4_mb_new_blocks+0xf80/0x47c0 fs/ext4/mballoc.c:5750 ext4_ext_map_blocks+0x17d1/0x63d0 fs/ext4/extents.c:4372 ext4_map_blocks+0x97f/0x1a50 fs/ext4/inode.c:675 ext4_alloc_file_blocks+0x378/0xb60 fs/ext4/extents.c:4559 ext4_zero_range+0x4d1/0xdb0 fs/ext4/extents.c:4676 ext4_fallocate+0x51d/0x1e50 fs/ext4/extents.c:4811 vfs_fallocate+0x57e/0x6f0 fs/open.c:308 ksys_fallocate fs/open.c:331 [inline] __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0xbd/0x100 fs/open.c:337 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 -> #1 (&ei->i_data_sem){++++}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ext4_map_blocks+0x350/0x1a50 fs/ext4/inode.c:600 ext4_append+0x22d/0x560 fs/ext4/namei.c:75 ext4_init_new_dir+0x2a7/0x910 fs/ext4/namei.c:3032 ext4_mkdir+0x4c3/0xc90 fs/ext4/namei.c:3078 vfs_mkdir+0x386/0x570 fs/namei.c:4116 do_mkdirat+0x1dd/0x5c0 fs/namei.c:4141 __do_sys_mkdir fs/namei.c:4161 [inline] __se_sys_mkdir fs/namei.c:4159 [inline] __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4159 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 (jbd2_handle){++++}-{0:0}: check_prev_add kernel/locking/lockdep.c:3120 [inline] check_prevs_add kernel/locking/lockdep.c:3239 [inline] validate_chain kernel/locking/lockdep.c:3855 [inline] __lock_acquire+0x38f7/0x7d40 kernel/locking/lockdep.c:5120 lock_acquire+0x19f/0x400 kernel/locking/lockdep.c:5737 wait_transaction_locked+0x1bb/0x270 fs/jbd2/transaction.c:178 add_transaction_credits+0x104/0xcb0 fs/jbd2/transaction.c:242 start_this_handle+0x723/0x1560 fs/jbd2/transaction.c:423 jbd2__journal_start+0x2b7/0x5a0 fs/jbd2/transaction.c:521 jbd2_journal_start+0x26/0x30 fs/jbd2/transaction.c:560 ocfs2_start_trans+0x3b2/0x6f0 fs/ocfs2/journal.c:376 ocfs2_free_cached_clusters fs/ocfs2/alloc.c:6504 [inline] ocfs2_run_deallocs+0xf15/0x1560 fs/ocfs2/alloc.c:6567 ocfs2_remove_value_outside+0x4d8/0x6f0 fs/ocfs2/xattr.c:2430 ocfs2_xattr_block_remove fs/ocfs2/xattr.c:2482 [inline] ocfs2_xattr_free_block fs/ocfs2/xattr.c:2514 [inline] ocfs2_xattr_remove+0x689/0x1650 fs/ocfs2/xattr.c:2611 ocfs2_wipe_inode fs/ocfs2/inode.c:839 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1112 [inline] ocfs2_evict_inode+0x1343/0x4190 fs/ocfs2/inode.c:1249 evict+0x4b6/0x8b0 fs/inode.c:647 d_delete_notify include/linux/fsnotify.h:267 [inline] vfs_rmdir+0x392/0x410 fs/namei.c:4213 do_rmdir+0x27f/0x710 fs/namei.c:4261 __do_sys_rmdir fs/namei.c:4280 [inline] __se_sys_rmdir fs/namei.c:4278 [inline] __x64_sys_rmdir+0x45/0x50 fs/namei.c:4278 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: Chain exists of: jbd2_handle --> sb_internal#3 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#3); lock(&journal->j_trans_barrier); lock(jbd2_handle); *** DEADLOCK *** 7 locks held by syz.0.358/5821: #0: ffff88805c3f0460 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff88806080ed88 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:828 [inline] #1: ffff88806080ed88 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: do_rmdir+0x1b0/0x710 fs/namei.c:4248 #2: ffff88801f45cab0 (&osb->nfs_sync_rwlock){.+.+}-{3:3}, at: ocfs2_nfs_sync_lock+0x103/0x270 fs/ocfs2/dlmglue.c:2874 #3: ffff8880609b5108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline] #3: ffff8880609b5108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:809 [inline] #3: ffff8880609b5108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1112 [inline] #3: ffff8880609b5108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_evict_inode+0x2302/0x4190 fs/ocfs2/inode.c:1249 #4: ffff8880608042c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline] #4: ffff8880608042c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_free_cached_clusters fs/ocfs2/alloc.c:6493 [inline] #4: ffff8880608042c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_run_deallocs+0xdfc/0x1560 fs/ocfs2/alloc.c:6567 #5: ffff88805c3f0650 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_free_cached_clusters fs/ocfs2/alloc.c:6504 [inline] #5: ffff88805c3f0650 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_run_deallocs+0xf15/0x1560 fs/ocfs2/alloc.c:6567 #6: ffff88805f9a2ce8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 stack backtrace: CPU: 0 PID: 5821 Comm: syz.0.358 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x2f8/0x400 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3120 [inline] check_prevs_add kernel/locking/lockdep.c:3239 [inline] validate_chain kernel/locking/lockdep.c:3855 [inline] __lock_acquire+0x38f7/0x7d40 kernel/locking/lockdep.c:5120 lock_acquire+0x19f/0x400 kernel/locking/lockdep.c:5737 wait_transaction_locked+0x1bb/0x270 fs/jbd2/transaction.c:178 add_transaction_credits+0x104/0xcb0 fs/jbd2/transaction.c:242 start_this_handle+0x723/0x1560 fs/jbd2/transaction.c:423 jbd2__journal_start+0x2b7/0x5a0 fs/jbd2/transaction.c:521 jbd2_journal_start+0x26/0x30 fs/jbd2/transaction.c:560 ocfs2_start_trans+0x3b2/0x6f0 fs/ocfs2/journal.c:376 ocfs2_free_cached_clusters fs/ocfs2/alloc.c:6504 [inline] ocfs2_run_deallocs+0xf15/0x1560 fs/ocfs2/alloc.c:6567 ocfs2_remove_value_outside+0x4d8/0x6f0 fs/ocfs2/xattr.c:2430 ocfs2_xattr_block_remove fs/ocfs2/xattr.c:2482 [inline] ocfs2_xattr_free_block fs/ocfs2/xattr.c:2514 [inline] ocfs2_xattr_remove+0x689/0x1650 fs/ocfs2/xattr.c:2611 ocfs2_wipe_inode fs/ocfs2/inode.c:839 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1112 [inline] ocfs2_evict_inode+0x1343/0x4190 fs/ocfs2/inode.c:1249 evict+0x4b6/0x8b0 fs/inode.c:647 d_delete_notify include/linux/fsnotify.h:267 [inline] vfs_rmdir+0x392/0x410 fs/namei.c:4213 do_rmdir+0x27f/0x710 fs/namei.c:4261 __do_sys_rmdir fs/namei.c:4280 [inline] __se_sys_rmdir fs/namei.c:4278 [inline] __x64_sys_rmdir+0x45/0x50 fs/namei.c:4278 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: 0033:0x7f73f5edc559 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:00007f73f4133028 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 00007f73f6162fa0 RCX: 00007f73f5edc559 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00002000000004c0 RBP: 00007f73f5f73b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f73f6163038 R14: 00007f73f6162fa0 R15: 00007ffe939b06e8 kcov: kcov_task_exit: t = ffff888023599dc0, kcov->t = ffff888023599dc0