====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.2.2817/15740 is trying to acquire lock: ffff888049db14e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 but task is already holding lock: ffff888034ad18e0 (&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: -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: lock_acquire kernel/locking/lockdep.c:5886 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843 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_mkdir+0xef/0x430 fs/ocfs2/namei.c:660 vfs_mkdir+0x364/0x850 fs/namei.c:5410 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5443 __do_sys_mkdirat fs/namei.c:5464 [inline] __se_sys_mkdirat fs/namei.c:5461 [inline] __x64_sys_mkdirat+0x89/0xc0 fs/namei.c:5461 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (sb_internal#5){.+.+}-{0:0}: lock_acquire kernel/locking/lockdep.c:5886 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843 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_orphan_for_truncate fs/ocfs2/file.c:397 [inline] ocfs2_truncate_file+0x503/0x17d0 fs/ocfs2/file.c:506 ocfs2_setattr+0x14a0/0x2680 fs/ocfs2/file.c:1224 notify_change+0xb25/0x1330 fs/attr.c:556 do_truncate+0x1df/0x240 fs/open.c:68 handle_truncate fs/namei.c:4300 [inline] do_open fs/namei.c:4841 [inline] path_openat+0x1e6d/0x2440 fs/namei.c:5000 do_file_open+0x20e/0x430 fs/namei.c:5029 do_sys_openat2+0x10f/0x1e0 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_open fs/open.c:1431 [inline] __se_sys_open fs/open.c:1427 [inline] __x64_sys_open+0xfe/0x1d0 fs/open.c:1427 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&oi->ip_alloc_sem){+.+.}-{4:4}: lock_acquire kernel/locking/lockdep.c:5886 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843 down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1631 ocfs2_try_remove_refcount_tree+0xa7/0x2f0 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xb57/0x17d0 fs/ocfs2/file.c:527 ocfs2_setattr+0x14a0/0x2680 fs/ocfs2/file.c:1224 notify_change+0xb25/0x1330 fs/attr.c:556 do_truncate+0x1df/0x240 fs/open.c:68 handle_truncate fs/namei.c:4300 [inline] do_open fs/namei.c:4841 [inline] path_openat+0x1e6d/0x2440 fs/namei.c:5000 do_file_open+0x20e/0x430 fs/namei.c:5029 do_sys_openat2+0x10f/0x1e0 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_open fs/open.c:1431 [inline] __se_sys_open fs/open.c:1427 [inline] __x64_sys_open+0xfe/0x1d0 fs/open.c:1427 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3181 check_prevs_add kernel/locking/lockdep.c:3300 [inline] validate_chain kernel/locking/lockdep.c:3924 [inline] __lock_acquire+0x1492/0x1ec0 kernel/locking/lockdep.c:5253 lock_acquire kernel/locking/lockdep.c:5886 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843 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:676 lookup_open+0x1255/0x1990 fs/namei.c:4567 open_last_lookups fs/namei.c:4767 [inline] path_openat+0xa2c/0x2440 fs/namei.c:4997 do_file_open+0x20e/0x430 fs/namei.c:5029 do_sys_openat2+0x10f/0x1e0 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_creat fs/open.c:1501 [inline] __se_sys_creat fs/open.c:1495 [inline] __x64_sys_creat+0xcc/0x120 fs/open.c:1495 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 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 *** locks held by syz.2.2817/15740: 8, last CPU#1: #0: ffff88807caf0460 (sb_writers#32){.+.+}-{0:0}, at: lookup_open+0x150/0x1990 fs/namei.c:4451 #1: ffff888049db17a0 (&type->i_mutex_dir_key#18){++++}-{4:4}, at: inode_lock include/linux/fs.h:1025 [inline] #1: ffff888049db17a0 (&type->i_mutex_dir_key#18){++++}-{4:4}, at: lookup_open+0xb13/0x1990 fs/namei.c:4458 #2: ffff888049db79a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1025 [inline] #2: ffff888049db79a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4b00 fs/ocfs2/suballoc.c:904 #3: ffff888049db25a0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1025 [inline] #3: ffff888049db25a0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4b00 fs/ocfs2/suballoc.c:904 #4: ffff888049db5da0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1025 [inline] #4: ffff888049db5da0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0xea/0xbe0 fs/ocfs2/localalloc.c:636 #5: ffff88807caf0650 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_mknod+0x160d/0x2770 fs/ocfs2/namei.c:365 #6: ffff888034ad18e0 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x5cc/0x8f0 fs/ocfs2/journal.c:369 #7: ffff888035e78938 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0xfa7/0x1390 fs/jbd2/transaction.c:444 stack backtrace: CPU: 1 UID: 0 PID: 15740 Comm: syz.2.2817 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_circular_bug.cold+0x178/0x1be kernel/locking/lockdep.c:2059 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2191 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3181 check_prevs_add kernel/locking/lockdep.c:3300 [inline] validate_chain kernel/locking/lockdep.c:3924 [inline] __lock_acquire+0x1492/0x1ec0 kernel/locking/lockdep.c:5253 lock_acquire kernel/locking/lockdep.c:5886 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843 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:676 lookup_open+0x1255/0x1990 fs/namei.c:4567 open_last_lookups fs/namei.c:4767 [inline] path_openat+0xa2c/0x2440 fs/namei.c:4997 do_file_open+0x20e/0x430 fs/namei.c:5029 do_sys_openat2+0x10f/0x1e0 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_creat fs/open.c:1501 [inline] __se_sys_creat fs/open.c:1495 [inline] __x64_sys_creat+0xcc/0x120 fs/open.c:1495 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f45fdb9e0d9 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:00007f45fea4d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f45fde26090 RCX: 00007f45fdb9e0d9 RDX: 0000000000000000 RSI: 000000000000006a RDI: 0000200000000000 RBP: 00007f45fdc35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f45fde26128 R14: 00007f45fde26090 R15: 00007ffcb2ec8548