====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.181/8229 is trying to acquire lock: ffff0000f4b82640 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] ffff0000f4b82640 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x104/0x26a8 fs/ocfs2/localalloc.c:636 but task is already holding lock: ffff0000f4b0b120 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_write_begin+0x190/0x30c fs/ocfs2/aops.c:1882 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: down_read+0x58/0x308 kernel/locking/rwsem.c:1537 ocfs2_xattr_ibody_find+0x100/0x668 fs/ocfs2/xattr.c:2719 ocfs2_xattr_set_handle+0x2bc/0x5e4 fs/ocfs2/xattr.c:3533 ocfs2_init_security_set+0xb4/0xd8 fs/ocfs2/xattr.c:7337 ocfs2_mknod+0x104c/0x1cf0 fs/ocfs2/namei.c:423 ocfs2_create+0x178/0x474 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4440 [inline] open_last_lookups fs/namei.c:4540 [inline] path_openat+0x143c/0x3114 fs/namei.c:4784 do_filp_open+0x18c/0x36c fs/namei.c:4814 do_sys_openat2+0x11c/0x1f0 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1447 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x58/0x308 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x258/0x63c fs/ocfs2/acl.c:367 ocfs2_mknod+0x1008/0x1cf0 fs/ocfs2/namei.c:414 ocfs2_mkdir+0x178/0x474 fs/ocfs2/namei.c:660 vfs_mkdir+0x408/0x48c fs/namei.c:5130 do_mkdirat+0x238/0x448 fs/namei.c:5164 __do_sys_mkdirat fs/namei.c:5186 [inline] __se_sys_mkdirat fs/namei.c:5184 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:5184 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x58/0x308 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372 ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767 dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2462 dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2499 ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930 ocfs2_fill_super+0x3fe4/0x532c fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x360/0x414 fs/super.c:1691 get_tree_bdev+0x2c/0x3c fs/super.c:1714 ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184 vfs_get_tree+0x90/0x28c fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x284/0x944 fs/namespace.c:3712 path_mount+0x5b4/0xdfc fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount fs/namespace.c:4201 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4201 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #1 (sb_internal#4){.+.+}-{0:0}: percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370 ocfs2_mknod+0xc30/0x1cf0 fs/ocfs2/namei.c:365 ocfs2_mkdir+0x178/0x474 fs/ocfs2/namei.c:660 vfs_mkdir+0x408/0x48c fs/namei.c:5130 do_mkdirat+0x238/0x448 fs/namei.c:5164 __do_sys_mkdirat fs/namei.c:5186 [inline] __se_sys_mkdirat fs/namei.c:5184 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:5184 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x50/0xc0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [inline] ocfs2_reserve_local_alloc_bits+0x104/0x26a8 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x198/0x9e0 fs/ocfs2/suballoc.c:1169 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1230 [inline] ocfs2_lock_allocators+0x27c/0x518 fs/ocfs2/suballoc.c:2783 ocfs2_write_begin_nolock+0x1ec8/0x3868 fs/ocfs2/aops.c:1719 ocfs2_write_begin+0x1b4/0x30c fs/ocfs2/aops.c:1884 generic_perform_write+0x244/0x7bc mm/filemap.c:4314 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4431 ocfs2_file_write_iter+0x12f8/0x1b8c fs/ocfs2/file.c:2475 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x540/0xa3c fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __arm64_sys_pwrite64+0x170/0x208 fs/read_write.c:798 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE] --> &oi->ip_xattr_sem --> &ocfs2_file_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]); *** DEADLOCK *** 3 locks held by syz.4.181/8229: #0: ffff0000d3a06420 (sb_writers#14){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2681 [inline] #0: ffff0000d3a06420 (sb_writers#14){.+.+}-{0:0}, at: vfs_write+0x24c/0xa3c fs/read_write.c:682 #1: ffff0000f4b0b480 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #1: ffff0000f4b0b480 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: ocfs2_file_write_iter+0x388/0x1b8c fs/ocfs2/file.c:2405 #2: ffff0000f4b0b120 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_write_begin+0x190/0x30c fs/ocfs2/aops.c:1882 stack backtrace: CPU: 1 UID: 0 PID: 8229 Comm: syz.4.181 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x50/0xc0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [inline] ocfs2_reserve_local_alloc_bits+0x104/0x26a8 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x198/0x9e0 fs/ocfs2/suballoc.c:1169 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1230 [inline] ocfs2_lock_allocators+0x27c/0x518 fs/ocfs2/suballoc.c:2783 ocfs2_write_begin_nolock+0x1ec8/0x3868 fs/ocfs2/aops.c:1719 ocfs2_write_begin+0x1b4/0x30c fs/ocfs2/aops.c:1884 generic_perform_write+0x244/0x7bc mm/filemap.c:4314 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4431 ocfs2_file_write_iter+0x12f8/0x1b8c fs/ocfs2/file.c:2475 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x540/0xa3c fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __arm64_sys_pwrite64+0x170/0x208 fs/read_write.c:798 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596