====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.6.18925/15626 is trying to acquire lock: ffff8880419c29d8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x1c3/0x800 fs/ocfs2/acl.c:367 but task is already holding lock: ffff888067cd4918 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ac/0x700 fs/ocfs2/journal.c:369 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x97/0x200 kernel/locking/rwsem.c:1568 ocfs2_start_trans+0x3ac/0x700 fs/ocfs2/journal.c:369 ocfs2_modify_bh+0xe3/0x4d0 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1454/0x1810 fs/ocfs2/quota_local.c:767 dquot_load_quota_sb+0x791/0xbd0 fs/quota/dquot.c:2484 dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2521 ocfs2_enable_quotas+0x1c8/0x4a0 fs/ocfs2/super.c:930 ocfs2_fill_super+0x535f/0x6980 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3758 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3834 do_mount fs/namespace.c:4167 [inline] __do_sys_mount fs/namespace.c:4383 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4360 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (sb_internal#5){.+.+}-{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+0x2ac/0x700 fs/ocfs2/journal.c:367 ocfs2_xattr_set+0xebb/0x13e0 fs/ocfs2/xattr.c:3674 __vfs_setxattr+0x43c/0x480 fs/xattr.c:218 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:252 vfs_setxattr+0x163/0x370 fs/xattr.c:339 do_setxattr fs/xattr.c:657 [inline] filename_setxattr+0x296/0x630 fs/xattr.c:685 path_setxattrat+0x3eb/0x440 fs/xattr.c:729 __do_sys_setxattr fs/xattr.c:763 [inline] __se_sys_setxattr fs/xattr.c:759 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1625 inode_lock include/linux/fs.h:1029 [inline] ocfs2_reserve_suballoc_bits+0x16d/0x4840 fs/ocfs2/suballoc.c:882 ocfs2_reserve_new_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1078 ocfs2_init_xattr_set_ctxt+0x2f5/0x760 fs/ocfs2/xattr.c:3308 ocfs2_xattr_set+0xc42/0x13e0 fs/ocfs2/xattr.c:3665 __vfs_setxattr+0x43c/0x480 fs/xattr.c:218 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:252 vfs_setxattr+0x163/0x370 fs/xattr.c:339 do_setxattr fs/xattr.c:657 [inline] filename_setxattr+0x296/0x630 fs/xattr.c:685 path_setxattrat+0x3eb/0x440 fs/xattr.c:729 __do_sys_setxattr fs/xattr.c:763 [inline] __se_sys_setxattr fs/xattr.c:759 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3167 [inline] check_prevs_add kernel/locking/lockdep.c:3286 [inline] validate_chain kernel/locking/lockdep.c:3910 [inline] __lock_acquire+0x15a5/0x2d10 kernel/locking/lockdep.c:5239 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5870 down_read+0x97/0x200 kernel/locking/rwsem.c:1568 ocfs2_init_acl+0x1c3/0x800 fs/ocfs2/acl.c:367 ocfs2_mknod+0x1679/0x2260 fs/ocfs2/namei.c:414 ocfs2_mkdir+0x181/0x460 fs/ocfs2/namei.c:660 vfs_mkdir+0x40b/0x630 fs/namei.c:5261 filename_mkdirat+0x289/0x520 fs/namei.c:5294 __do_sys_mkdirat fs/namei.c:5315 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 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: &oi->ip_xattr_sem --> sb_internal#5 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#5); lock(&journal->j_trans_barrier); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.6.18925/15626: #0: ffff88802b5ee480 (sb_writers#41){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff8880419c2d00 (&type->i_mutex_dir_key#30/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1074 [inline] #1: ffff8880419c2d00 (&type->i_mutex_dir_key#30/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2914 [inline] #1: ffff8880419c2d00 (&type->i_mutex_dir_key#30/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2938 [inline] #1: ffff8880419c2d00 (&type->i_mutex_dir_key#30/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4950 #2: ffff888061d73dc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #2: ffff888061d73dc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16d/0x4840 fs/ocfs2/suballoc.c:882 #3: ffff88805f258b80 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #3: ffff88805f258b80 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16d/0x4840 fs/ocfs2/suballoc.c:882 #4: ffff88805f25bdc0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #4: ffff88805f25bdc0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x11f/0x2660 fs/ocfs2/localalloc.c:636 #5: ffff88802b5ee770 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_mknod+0x1181/0x2260 fs/ocfs2/namei.c:365 #6: ffff888067cd4918 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ac/0x700 fs/ocfs2/journal.c:369 #7: ffff88803d208bb0 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x2054/0x2290 fs/jbd2/transaction.c:444 stack backtrace: CPU: 0 UID: 0 PID: 15626 Comm: syz.6.18925 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2045 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3167 [inline] check_prevs_add kernel/locking/lockdep.c:3286 [inline] validate_chain kernel/locking/lockdep.c:3910 [inline] __lock_acquire+0x15a5/0x2d10 kernel/locking/lockdep.c:5239 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5870 down_read+0x97/0x200 kernel/locking/rwsem.c:1568 ocfs2_init_acl+0x1c3/0x800 fs/ocfs2/acl.c:367 ocfs2_mknod+0x1679/0x2260 fs/ocfs2/namei.c:414 ocfs2_mkdir+0x181/0x460 fs/ocfs2/namei.c:660 vfs_mkdir+0x40b/0x630 fs/namei.c:5261 filename_mkdirat+0x289/0x520 fs/namei.c:5294 __do_sys_mkdirat fs/namei.c:5315 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f062b67bcc7 Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007f06298d5e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f06298d5ee0 RCX: 00007f062b67bcc7 RDX: 00000000000001ff RSI: 0000200000000280 RDI: 00000000ffffff9c RBP: 0000200000000300 R08: 0000200000000140 R09: 0000000000000000 R10: 0000200000000300 R11: 0000000000000246 R12: 0000200000000280 R13: 00007f06298d5ea0 R14: 0000000000000000 R15: 0000000000000000