====================================================== WARNING: possible circular locking dependency detected 6.14.0-syzkaller-13423-ga8662bcd2ff1 #0 Not tainted ------------------------------------------------------ syz.0.135/6916 is trying to acquire lock: ffff88805a8a6610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_write_info+0x11e/0x3a0 fs/ocfs2/quota_global.c:997 but task is already holding lock: ffff888033a66a20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x23f/0x2c0 fs/ocfs2/quota_global.c:314 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 down_write+0x9c/0x220 kernel/locking/rwsem.c:1577 ocfs2_lock_global_qf+0x23f/0x2c0 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x2ae/0xb80 fs/ocfs2/quota_global.c:828 dqget+0x770/0xeb0 fs/quota/dquot.c:977 __dquot_initialize+0x335/0xfc0 fs/quota/dquot.c:1505 ocfs2_get_init_inode+0x15a/0x1d0 fs/ocfs2/namei.c:202 ocfs2_mknod+0xcfe/0x2b30 fs/ocfs2/namei.c:310 ocfs2_create+0x1ad/0x480 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3666 [inline] open_last_lookups fs/namei.c:3765 [inline] path_openat+0x194b/0x35d0 fs/namei.c:4001 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0x249/0x2a0 fs/open.c:1455 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #5 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 down_write+0x9c/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:867 [inline] ocfs2_lock_global_qf+0x21c/0x2c0 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x2ae/0xb80 fs/ocfs2/quota_global.c:828 dqget+0x770/0xeb0 fs/quota/dquot.c:977 __dquot_initialize+0x335/0xfc0 fs/quota/dquot.c:1505 ocfs2_get_init_inode+0x15a/0x1d0 fs/ocfs2/namei.c:202 ocfs2_mknod+0xcfe/0x2b30 fs/ocfs2/namei.c:310 ocfs2_create+0x1ad/0x480 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3666 [inline] open_last_lookups fs/namei.c:3765 [inline] path_openat+0x194b/0x35d0 fs/namei.c:4001 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0x249/0x2a0 fs/open.c:1455 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #4 (&dquot->dq_lock){+.+.}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x1a5/0x10c0 kernel/locking/mutex.c:746 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x6e6/0xeb0 fs/quota/dquot.c:972 dquot_transfer+0x4a8/0x6f0 fs/quota/dquot.c:2154 ext4_setattr+0xb2e/0x1c60 fs/ext4/inode.c:5431 notify_change+0xbca/0xe90 fs/attr.c:552 chown_common+0x503/0x850 fs/open.c:782 vfs_fchown fs/open.c:850 [inline] ksys_fchown+0xe2/0x150 fs/open.c:862 __do_sys_fchown fs/open.c:867 [inline] __se_sys_fchown fs/open.c:865 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:865 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&ei->xattr_sem){++++}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 down_write+0x9c/0x220 kernel/locking/rwsem.c:1577 ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline] ext4_xattr_set_handle+0x296/0x1a20 fs/ext4/xattr.c:2362 ext4_initxattrs+0xa3/0x120 fs/ext4/xattr_security.c:44 security_inode_init_security+0x29a/0x490 security/security.c:1852 __ext4_new_inode+0x39fd/0x4700 fs/ext4/ialloc.c:1325 ext4_create+0x278/0x550 fs/ext4/namei.c:2824 lookup_open fs/namei.c:3666 [inline] open_last_lookups fs/namei.c:3765 [inline] path_openat+0x194b/0x35d0 fs/namei.c:4001 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0x249/0x2a0 fs/open.c:1455 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (jbd2_handle){++++}-{0:0}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 start_this_handle+0x1ee4/0x21a0 fs/jbd2/transaction.c:444 jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:501 jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:540 ocfs2_start_trans+0x3cd/0x710 fs/ocfs2/journal.c:352 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0xa54/0x4f30 fs/ocfs2/suballoc.c:832 ocfs2_reserve_new_metadata_blocks+0x41c/0x9b0 fs/ocfs2/suballoc.c:982 ocfs2_mknod+0x143e/0x2b30 fs/ocfs2/namei.c:347 ocfs2_mkdir+0x19c/0x470 fs/ocfs2/namei.c:656 vfs_mkdir+0x2f9/0x500 fs/namei.c:4324 do_mkdirat+0x273/0x3f0 fs/namei.c:4357 __do_sys_mkdirat fs/namei.c:4374 [inline] __se_sys_mkdirat fs/namei.c:4372 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4372 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 down_read+0xb3/0xa50 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3c2/0x710 fs/ocfs2/journal.c:350 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0xa54/0x4f30 fs/ocfs2/suballoc.c:832 ocfs2_reserve_new_metadata_blocks+0x41c/0x9b0 fs/ocfs2/suballoc.c:982 ocfs2_mknod+0x143e/0x2b30 fs/ocfs2/namei.c:347 ocfs2_mkdir+0x19c/0x470 fs/ocfs2/namei.c:656 vfs_mkdir+0x2f9/0x500 fs/namei.c:4324 do_mkdirat+0x273/0x3f0 fs/namei.c:4357 __do_sys_mkdirat fs/namei.c:4374 [inline] __se_sys_mkdirat fs/namei.c:4372 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4372 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (sb_internal#2){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xa69/0x24e0 kernel/locking/lockdep.c:3909 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x2bd/0x710 fs/ocfs2/journal.c:348 ocfs2_write_info+0x11e/0x3a0 fs/ocfs2/quota_global.c:997 quota_setinfo+0x485/0x5d0 fs/quota/quota.c:174 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl+0x2b9/0xa40 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: sb_internal#2 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7 --> &ocfs2_quota_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7); lock(&ocfs2_quota_ip_alloc_sem_key); rlock(sb_internal#2); *** DEADLOCK *** 3 locks held by syz.0.135/6916: #0: ffff88805a8a60e0 (&type->s_umount_key#50){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff88805a8a60e0 (&type->s_umount_key#50){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff888033a66d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff888033a66d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x21c/0x2c0 fs/ocfs2/quota_global.c:313 #2: ffff888033a66a20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x23f/0x2c0 fs/ocfs2/quota_global.c:314 stack backtrace: CPU: 0 UID: 0 PID: 6916 Comm: syz.0.135 Not tainted 6.14.0-syzkaller-13423-ga8662bcd2ff1 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2079 check_noncircular+0x142/0x160 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xa69/0x24e0 kernel/locking/lockdep.c:3909 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x2bd/0x710 fs/ocfs2/journal.c:348 ocfs2_write_info+0x11e/0x3a0 fs/ocfs2/quota_global.c:997 quota_setinfo+0x485/0x5d0 fs/quota/quota.c:174 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl+0x2b9/0xa40 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd13358d169 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:00007fd1343dd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007fd1337a6160 RCX: 00007fd13358d169 RDX: 000000000000ee01 RSI: 0000200000000080 RDI: ffffffff80000600 RBP: 00007fd13360e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000180 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fd1337a6160 R15: 00007ffc9c029b68