ocfs2: Slot 0 on device (7,0) was already allocated to this node! ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc6-syzkaller-gaaef6f251176 #0 Not tainted ------------------------------------------------------ syz.0.3952/16013 is trying to acquire lock: ffff0000f3bfa378 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_get+0xe8/0x220 fs/ocfs2/xattr.c:1338 but task is already holding lock: ffff0000c8704950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe4c/0x10dc fs/jbd2/transaction.c:442 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (jbd2_handle){++++}-{0:0}: start_this_handle+0xe74/0x10dc fs/jbd2/transaction.c:444 jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540 ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374 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:2459 dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930 ocfs2_fill_super+0x4018/0x5340 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x360/0x414 fs/super.c:1681 get_tree_bdev+0x2c/0x3c fs/super.c:1704 ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184 vfs_get_tree+0x90/0x28c fs/super.c:1804 do_new_mount+0x228/0x814 fs/namespace.c:3902 path_mount+0x5b4/0xde0 fs/namespace.c:4226 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount fs/namespace.c:4427 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #4 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 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:2459 dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930 ocfs2_fill_super+0x4018/0x5340 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x360/0x414 fs/super.c:1681 get_tree_bdev+0x2c/0x3c fs/super.c:1704 ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184 vfs_get_tree+0x90/0x28c fs/super.c:1804 do_new_mount+0x228/0x814 fs/namespace.c:3902 path_mount+0x5b4/0xde0 fs/namespace.c:4226 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount fs/namespace.c:4427 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #3 (sb_internal#2){.+.+}-{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.h:1795 [inline] sb_start_intwrite include/linux/fs.h:1978 [inline] ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370 ocfs2_extend_allocation+0x5d4/0x14cc fs/ocfs2/file.c:597 ocfs2_extend_no_holes+0x1a8/0x424 fs/ocfs2/file.c:1027 ocfs2_acquire_dquot+0x530/0xa10 fs/ocfs2/quota_global.c:853 dqget+0x654/0xccc fs/quota/dquot.c:977 ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233 notify_change+0x9a4/0xc50 fs/attr.c:552 chown_common+0x374/0x4dc fs/open.c:790 vfs_fchown fs/open.c:858 [inline] ksys_fchown+0xe0/0x158 fs/open.c:870 __do_sys_fchown fs/open.c:875 [inline] __se_sys_fchown fs/open.c:873 [inline] __arm64_sys_fchown+0x7c/0x94 fs/open.c:873 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #2 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_reserve_local_alloc_bits+0x104/0x26a0 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x198/0x9e0 fs/ocfs2/suballoc.c:1168 ocfs2_reserve_clusters+0x3c/0x50 fs/ocfs2/suballoc.c:1229 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2854 [inline] ocfs2_extend_dir+0x510/0x3964 fs/ocfs2/dir.c:3199 ocfs2_prepare_dir_for_insert+0x281c/0x4664 fs/ocfs2/dir.c:4304 ocfs2_mknod+0x6ec/0x1cf0 fs/ocfs2/namei.c:294 ocfs2_mkdir+0x190/0x474 fs/ocfs2/namei.c:656 vfs_mkdir+0x284/0x424 fs/namei.c:4375 do_mkdirat+0x1f8/0x4c8 fs/namei.c:4408 __do_sys_mkdirat fs/namei.c:4425 [inline] __se_sys_mkdirat fs/namei.c:4423 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4423 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ocfs2_try_remove_refcount_tree+0xb4/0x2d8 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x460/0xe9c fs/ocfs2/xattr.c:3669 ocfs2_set_acl+0x574/0x628 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x190/0x25c fs/ocfs2/acl.c:286 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x70c/0x974 fs/posix_acl.c:1133 do_set_acl+0xc8/0x1a8 fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x268/0x4f8 fs/xattr.c:665 path_setxattrat+0x2e8/0x320 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __arm64_sys_setxattr+0xc0/0xdc fs/xattr.c:743 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 ocfs2_xattr_get+0xe8/0x220 fs/ocfs2/xattr.c:1338 ocfs2_xattr_security_get+0x40/0x54 fs/ocfs2/xattr.c:7231 __vfs_getxattr+0x394/0x3c0 fs/xattr.c:423 smk_fetch+0xc4/0x150 security/smack/smack_lsm.c:289 smack_d_instantiate+0x53c/0x7a4 security/smack/smack_lsm.c:3606 security_d_instantiate+0x100/0x204 security/security.c:4079 d_instantiate+0x5c/0x9c fs/dcache.c:1945 ocfs2_symlink+0x19c4/0x1ff8 fs/ocfs2/namei.c:2040 vfs_symlink+0x138/0x288 fs/namei.c:4739 do_symlinkat+0x17c/0x360 fs/namei.c:4765 __do_sys_symlinkat fs/namei.c:4781 [inline] __se_sys_symlinkat fs/namei.c:4778 [inline] __arm64_sys_symlinkat+0x9c/0xb4 fs/namei.c:4778 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Chain exists of: &oi->ip_xattr_sem --> &journal->j_trans_barrier --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(jbd2_handle); lock(&journal->j_trans_barrier); lock(jbd2_handle); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 7 locks held by syz.0.3952/16013: #0: ffff0000fe794428 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:557 #1: ffff0000df645f40 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline] #1: ffff0000df645f40 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: filename_create+0x1ac/0x3b4 fs/namei.c:4148 #2: ffff0000f3885f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #2: ffff0000f3885f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788 #3: ffff0000f38809c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #3: ffff0000f38809c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788 #4: ffff0000fe794618 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_symlink+0xa68/0x1ff8 fs/ocfs2/namei.c:1927 #5: ffff0000f3f220e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372 #6: ffff0000c8704950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe4c/0x10dc fs/jbd2/transaction.c:442 stack backtrace: CPU: 0 UID: 0 PID: 16013 Comm: syz.0.3952 Not tainted 6.16.0-rc6-syzkaller-gaaef6f251176 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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:2046 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 ocfs2_xattr_get+0xe8/0x220 fs/ocfs2/xattr.c:1338 ocfs2_xattr_security_get+0x40/0x54 fs/ocfs2/xattr.c:7231 __vfs_getxattr+0x394/0x3c0 fs/xattr.c:423 smk_fetch+0xc4/0x150 security/smack/smack_lsm.c:289 smack_d_instantiate+0x53c/0x7a4 security/smack/smack_lsm.c:3606 security_d_instantiate+0x100/0x204 security/security.c:4079 d_instantiate+0x5c/0x9c fs/dcache.c:1945 ocfs2_symlink+0x19c4/0x1ff8 fs/ocfs2/namei.c:2040 vfs_symlink+0x138/0x288 fs/namei.c:4739 do_symlinkat+0x17c/0x360 fs/namei.c:4765 __do_sys_symlinkat fs/namei.c:4781 [inline] __se_sys_symlinkat fs/namei.c:4778 [inline] __arm64_sys_symlinkat+0x9c/0xb4 fs/namei.c:4778 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596