====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc3-syzkaller-00193-ge9b8ffafd20a #0 Not tainted ------------------------------------------------------ syz.5.288/8120 is trying to acquire lock: ffff8880542c87a8 (&dquot->dq_lock){+.+.}-{4:4}, at: wait_on_dquot fs/quota/dquot.c:354 [inline] ffff8880542c87a8 (&dquot->dq_lock){+.+.}-{4:4}, at: dqget+0x6e6/0xeb0 fs/quota/dquot.c:972 but task is already holding lock: ffff888054274620 (&ei->xattr_sem){++++}-{4:4}, at: ext4_setattr+0xb37/0x1da0 fs/ext4/inode.c:5399 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&ei->xattr_sem){++++}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 ext4_write_lock_xattr fs/ext4/xattr.h:154 [inline] ext4_xattr_set_handle+0x277/0x1580 fs/ext4/xattr.c:2373 ext4_initxattrs+0xa3/0x120 fs/ext4/xattr_security.c:44 security_inode_init_security+0x29c/0x480 security/security.c:1847 __ext4_new_inode+0x3635/0x4380 fs/ext4/ialloc.c:1324 ext4_create+0x279/0x550 fs/ext4/namei.c:2841 lookup_open fs/namei.c:3649 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3984 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #4 (jbd2_handle){++++}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 start_this_handle+0x1eb4/0x2110 fs/jbd2/transaction.c:448 jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:505 jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:544 ocfs2_start_trans+0x3c9/0x700 fs/ocfs2/journal.c:352 ocfs2_shutdown_local_alloc+0x218/0xa90 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x202/0x910 fs/ocfs2/super.c:1877 generic_shutdown_super+0x139/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3be/0x700 fs/ocfs2/journal.c:350 ocfs2_shutdown_local_alloc+0x218/0xa90 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x202/0x910 fs/ocfs2/super.c:1877 generic_shutdown_super+0x139/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (sb_internal#5){.+.+}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1725 [inline] sb_start_intwrite include/linux/fs.h:1908 [inline] ocfs2_start_trans+0x2b9/0x700 fs/ocfs2/journal.c:348 ocfs2_acquire_dquot+0x6df/0xb70 fs/ocfs2/quota_global.c:855 dqget+0x770/0xeb0 fs/quota/dquot.c:977 ocfs2_setattr+0x114c/0x1ef0 fs/ocfs2/file.c:1243 notify_change+0xbca/0xe90 fs/attr.c:552 chown_common+0x501/0x850 fs/open.c:778 do_fchownat+0x16a/0x240 fs/open.c:809 __do_sys_lchown fs/open.c:834 [inline] __se_sys_lchown fs/open.c:832 [inline] __x64_sys_lchown+0x85/0xa0 fs/open.c:832 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 ocfs2_create_local_dquot+0x1de/0x1d70 fs/ocfs2/quota_local.c:1231 ocfs2_acquire_dquot+0x833/0xb70 fs/ocfs2/quota_global.c:878 dqget+0x770/0xeb0 fs/quota/dquot.c:977 ocfs2_setattr+0x114c/0x1ef0 fs/ocfs2/file.c:1243 notify_change+0xbca/0xe90 fs/attr.c:552 chown_common+0x501/0x850 fs/open.c:778 do_fchownat+0x16a/0x240 fs/open.c:809 __do_sys_lchown fs/open.c:834 [inline] __se_sys_lchown fs/open.c:832 [inline] __x64_sys_lchown+0x85/0xa0 fs/open.c:832 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&dquot->dq_lock){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x6e6/0xeb0 fs/quota/dquot.c:972 dquot_transfer+0x2c2/0x6d0 fs/quota/dquot.c:2140 ext4_setattr+0xb49/0x1da0 fs/ext4/inode.c:5400 notify_change+0xbca/0xe90 fs/attr.c:552 chown_common+0x501/0x850 fs/open.c:778 vfs_fchown fs/open.c:846 [inline] ksys_fchown+0xe2/0x150 fs/open.c:858 __do_sys_fchown fs/open.c:863 [inline] __se_sys_fchown fs/open.c:861 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:861 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &dquot->dq_lock --> jbd2_handle --> &ei->xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&ei->xattr_sem); lock(jbd2_handle); lock(&ei->xattr_sem); lock(&dquot->dq_lock); *** DEADLOCK *** 3 locks held by syz.5.288/8120: #0: ffff88802436c420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x200 fs/namespace.c:559 #1: ffff888054274950 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #1: ffff888054274950 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: chown_common+0x3e1/0x850 fs/open.c:768 #2: ffff888054274620 (&ei->xattr_sem){++++}-{4:4}, at: ext4_setattr+0xb37/0x1da0 fs/ext4/inode.c:5399 stack backtrace: CPU: 0 UID: 0 PID: 8120 Comm: syz.5.288 Not tainted 6.13.0-rc3-syzkaller-00193-ge9b8ffafd20a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x6e6/0xeb0 fs/quota/dquot.c:972 dquot_transfer+0x2c2/0x6d0 fs/quota/dquot.c:2140 ext4_setattr+0xb49/0x1da0 fs/ext4/inode.c:5400 notify_change+0xbca/0xe90 fs/attr.c:552 chown_common+0x501/0x850 fs/open.c:778 vfs_fchown fs/open.c:846 [inline] ksys_fchown+0xe2/0x150 fs/open.c:858 __do_sys_fchown fs/open.c:863 [inline] __se_sys_fchown fs/open.c:861 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:861 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f746bd85d29 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:00007f746cb78038 EFLAGS: 00000246 ORIG_RAX: 000000000000005d RAX: ffffffffffffffda RBX: 00007f746bf75fa0 RCX: 00007f746bd85d29 RDX: 000000000000000a RSI: 000000003a736e6f RDI: 0000000000000006 RBP: 00007f746be01aa8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f746bf75fa0 R15: 00007ffc22c20b18 EXT4-fs error (device loop5): ext4_empty_dir:3103: inode #12: block 32: comm syz.5.288: bad entry in directory: rec_len is smaller than minimal - offset=0, inode=3, rec_len=0, size=2048 fake=0 EXT4-fs warning (device loop5): ext4_empty_dir:3105: inode #12: comm syz.5.288: directory missing '.'