====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.1.6598/28959 is trying to acquire lock: ffff8880796f30e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 but task is already holding lock: ffff88804c8278e0 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x5cc/0x8f0 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}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 ocfs2_start_trans+0x5cc/0x8f0 fs/ocfs2/journal.c:369 ocfs2_mknod+0x160d/0x2770 fs/ocfs2/namei.c:365 ocfs2_create+0xf4/0x430 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4508 [inline] open_last_lookups fs/namei.c:4608 [inline] path_openat+0x341f/0x4280 fs/namei.c:4860 do_file_open+0x20e/0x430 fs/namei.c:4892 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_open fs/open.c:1382 [inline] __se_sys_open fs/open.c:1378 [inline] __x64_sys_open+0xfe/0x1d0 fs/open.c:1378 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#6){.+.+}-{0:0}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 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+0x4bb/0x8f0 fs/ocfs2/journal.c:367 ocfs2_xattr_set+0x12e4/0x2bb0 fs/ocfs2/xattr.c:3687 __vfs_removexattr+0x155/0x1c0 fs/xattr.c:544 __vfs_removexattr_locked+0x107/0x4d0 fs/xattr.c:579 vfs_removexattr+0xe9/0x2b0 fs/xattr.c:601 removexattr fs/xattr.c:1036 [inline] filename_removexattr fs/xattr.c:1064 [inline] path_removexattrat+0x38a/0x5f0 fs/xattr.c:1097 __do_sys_lremovexattr fs/xattr.c:1115 [inline] __se_sys_lremovexattr fs/xattr.c:1112 [inline] __x64_sys_lremovexattr+0x5e/0x80 fs/xattr.c:1112 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 ocfs2_mknod+0x173c/0x2770 fs/ocfs2/namei.c:414 ocfs2_create+0xf4/0x430 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4508 [inline] open_last_lookups fs/namei.c:4608 [inline] path_openat+0x341f/0x4280 fs/namei.c:4860 do_file_open+0x20e/0x430 fs/namei.c:4892 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 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#6 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#6); lock(&journal->j_trans_barrier); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.1.6598/28959: #0: ffff88807db0a450 (sb_writers#33){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:4597 [inline] #0: ffff88807db0a450 (sb_writers#33){.+.+}-{0:0}, at: path_openat+0xad9/0x4280 fs/namei.c:4860 #1: ffff8880796f33a0 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #1: ffff8880796f33a0 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: open_last_lookups fs/namei.c:4605 [inline] #1: ffff8880796f33a0 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: path_openat+0x29f2/0x4280 fs/namei.c:4860 #2: ffff8880791b09a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #2: ffff8880791b09a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4b00 fs/ocfs2/suballoc.c:904 #3: ffff8880791b17a0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #3: ffff8880791b17a0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4b00 fs/ocfs2/suballoc.c:904 #4: ffff8880791b33a0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #4: ffff8880791b33a0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0xea/0xbe0 fs/ocfs2/localalloc.c:636 #5: ffff88807db0a640 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_mknod+0x160d/0x2770 fs/ocfs2/namei.c:365 #6: ffff88804c8278e0 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x5cc/0x8f0 fs/ocfs2/journal.c:369 #7: ffff888049b6c938 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444 stack backtrace: CPU: 0 UID: 0 PID: 28959 Comm: syz.1.6598 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026 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+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 ocfs2_mknod+0x173c/0x2770 fs/ocfs2/namei.c:414 ocfs2_create+0xf4/0x430 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4508 [inline] open_last_lookups fs/namei.c:4608 [inline] path_openat+0x341f/0x4280 fs/namei.c:4860 do_file_open+0x20e/0x430 fs/namei.c:4892 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f10c499de59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f10c591b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f10c4c25fa0 RCX: 00007f10c499de59 RDX: 000000000000275a RSI: 0000200000000040 RDI: ffffffffffffff9c RBP: 00007f10c4a33e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f10c4c26038 R14: 00007f10c4c25fa0 R15: 00007ffeaeb200d8