====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.3.355/7136 is trying to acquire lock: ffff8880772bf6e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 but task is already holding lock: ffff888079cd00e0 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x5c8/0x920 fs/ocfs2/journal.c:369 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x99/0x450 kernel/locking/rwsem.c:1568 ocfs2_start_trans+0x5c8/0x920 fs/ocfs2/journal.c:369 ocfs2_mknod+0x162b/0x27b0 fs/ocfs2/namei.c:365 ocfs2_create+0xf4/0x450 fs/ocfs2/namei.c:677 lookup_open.isra.0+0xc47/0x11b0 fs/namei.c:4511 open_last_lookups fs/namei.c:4611 [inline] path_openat+0x2291/0x31a0 fs/namei.c:4855 do_file_open+0x20e/0x430 fs/namei.c:4887 do_sys_openat2+0x10d/0x1e0 fs/open.c:1364 do_sys_open fs/open.c:1370 [inline] __do_sys_openat fs/open.c:1386 [inline] __se_sys_openat fs/open.c:1381 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1381 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (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/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x4b7/0x920 fs/ocfs2/journal.c:367 ocfs2_xattr_set+0x12e4/0x2bc0 fs/ocfs2/xattr.c:3674 ocfs2_xattr_user_set+0xbd/0x100 fs/ocfs2/xattr.c:7407 __vfs_removexattr+0x155/0x1c0 fs/xattr.c:536 __vfs_removexattr_locked+0x107/0x4d0 fs/xattr.c:571 vfs_removexattr+0xe9/0x2b0 fs/xattr.c:593 removexattr fs/xattr.c:1028 [inline] filename_removexattr fs/xattr.c:1056 [inline] path_removexattrat+0x38a/0x5f0 fs/xattr.c:1089 __do_sys_removexattr fs/xattr.c:1101 [inline] __se_sys_removexattr fs/xattr.c:1098 [inline] __x64_sys_removexattr+0x5b/0x80 fs/xattr.c:1098 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/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:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x450 kernel/locking/rwsem.c:1568 ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 ocfs2_mknod+0x175a/0x27b0 fs/ocfs2/namei.c:414 ocfs2_mkdir+0xf2/0x450 fs/ocfs2/namei.c:660 vfs_mkdir+0x361/0x850 fs/namei.c:5261 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5294 __do_sys_mkdirat fs/namei.c:5315 [inline] __se_sys_mkdirat fs/namei.c:5312 [inline] __x64_sys_mkdirat+0x89/0xc0 fs/namei.c:5312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/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#2 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#2); lock(&journal->j_trans_barrier); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.3.355/7136: #0: ffff8880323c2410 (sb_writers#12){.+.+}-{0:0}, at: filename_create+0x10d/0x400 fs/namei.c:4943 #1: ffff8880772bf9a0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1074 [inline] #1: ffff8880772bf9a0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2914 [inline] #1: ffff8880772bf9a0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2938 [inline] #1: ffff8880772bf9a0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: filename_create+0x1c0/0x400 fs/namei.c:4950 #2: ffff888054ecdda0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #2: ffff888054ecdda0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4b50 fs/ocfs2/suballoc.c:882 #3: ffff888054eceba0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #3: ffff888054eceba0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4b50 fs/ocfs2/suballoc.c:882 #4: ffff888054ebeba0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #4: ffff888054ebeba0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0xea/0xbf0 fs/ocfs2/localalloc.c:636 #5: ffff8880323c2600 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_mknod+0x162b/0x27b0 fs/ocfs2/namei.c:365 #6: ffff888079cd00e0 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x5c8/0x920 fs/ocfs2/journal.c:369 #7: ffff88807c804938 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444 stack backtrace: CPU: 1 UID: 0 PID: 7136 Comm: syz.3.355 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043 check_noncircular+0x146/0x160 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+0x14b8/0x2630 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x450 kernel/locking/rwsem.c:1568 ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 ocfs2_mknod+0x175a/0x27b0 fs/ocfs2/namei.c:414 ocfs2_mkdir+0xf2/0x450 fs/ocfs2/namei.c:660 vfs_mkdir+0x361/0x850 fs/namei.c:5261 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5294 __do_sys_mkdirat fs/namei.c:5315 [inline] __se_sys_mkdirat fs/namei.c:5312 [inline] __x64_sys_mkdirat+0x89/0xc0 fs/namei.c:5312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fad9879bc47 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:00007fad995dce58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fad995dcee0 RCX: 00007fad9879bc47 RDX: 00000000000001ff RSI: 0000200000000200 RDI: 00000000ffffff9c RBP: 0000000000000000 R08: 0000200000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000200 R13: 00007fad995dcea0 R14: 0000000000000000 R15: 0000000000000000