loop1: detected capacity change from 0 to 32768 debugfs: Directory 'B1DE653C5FFC4D88B33B244AAB9EB3E9' with parent 'ocfs2' already present! ocfs2: Mounting device (7,1) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc1-syzkaller-00157-g02adc1490e6d #0 Not tainted ------------------------------------------------------ syz.1.1024/10727 is trying to acquire lock: ffff888054535f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] ffff888054535f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0xee/0xc60 fs/ocfs2/localalloc.c:636 but task is already holding lock: ffff8880525cb120 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_write_begin+0x1ac/0x340 fs/ocfs2/aops.c:1880 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: down_write+0x92/0x200 kernel/locking/rwsem.c:1577 ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x1043/0x2a80 fs/ocfs2/xattr.c:3669 ocfs2_set_acl+0x46d/0x550 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x224/0x2d0 fs/ocfs2/acl.c:286 set_posix_acl+0x25f/0x320 fs/posix_acl.c:954 vfs_set_acl+0x5a7/0x930 fs/posix_acl.c:1133 do_set_acl+0x14c/0x1a0 fs/posix_acl.c:1278 do_setxattr+0xeb/0x180 fs/xattr.c:633 filename_setxattr+0x16b/0x1d0 fs/xattr.c:665 path_setxattrat+0x1de/0x2a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xc6/0x140 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #4 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 ocfs2_init_acl+0x2fc/0x7d0 fs/ocfs2/acl.c:366 ocfs2_mknod+0xd5c/0x2540 fs/ocfs2/namei.c:410 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:673 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3708 open_last_lookups fs/namei.c:3807 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4043 do_filp_open+0x20b/0x470 fs/namei.c:4073 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0x5ea/0x1410 fs/jbd2/transaction.c:444 jbd2__journal_start+0x394/0x6a0 fs/jbd2/transaction.c:501 jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:540 ocfs2_start_trans+0x3b9/0x970 fs/ocfs2/journal.c:374 ocfs2_mknod+0xc19/0x2540 fs/ocfs2/namei.c:361 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:673 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3708 open_last_lookups fs/namei.c:3807 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4043 do_filp_open+0x20b/0x470 fs/namei.c:4073 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:372 ocfs2_mknod+0xc19/0x2540 fs/ocfs2/namei.c:361 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:673 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3708 open_last_lookups fs/namei.c:3807 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4043 do_filp_open+0x20b/0x470 fs/namei.c:4073 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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.h:1793 [inline] sb_start_intwrite include/linux/fs.h:1976 [inline] ocfs2_start_trans+0x29d/0x970 fs/ocfs2/journal.c:370 ocfs2_mknod+0xc19/0x2540 fs/ocfs2/namei.c:361 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:673 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3708 open_last_lookups fs/namei.c:3807 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4043 do_filp_open+0x20b/0x470 fs/namei.c:4073 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{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+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_write+0x92/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:867 [inline] ocfs2_reserve_local_alloc_bits+0xee/0xc60 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x695/0xe80 fs/ocfs2/suballoc.c:1168 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1229 [inline] ocfs2_lock_allocators+0x337/0x5f0 fs/ocfs2/suballoc.c:2772 ocfs2_write_begin_nolock+0x2834/0x6850 fs/ocfs2/aops.c:1718 ocfs2_write_begin+0x1cb/0x340 fs/ocfs2/aops.c:1882 generic_perform_write+0x3d0/0x930 mm/filemap.c:4112 __generic_file_write_iter+0x1f7/0x240 mm/filemap.c:4229 ocfs2_file_write_iter+0xbc4/0x21b0 fs/ocfs2/file.c:2469 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x6c7/0x1150 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x1eb/0x250 fs/read_write.c:798 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4 --> &oi->ip_xattr_sem --> &ocfs2_file_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4); *** DEADLOCK *** 3 locks held by syz.1.1024/10727: #0: ffff88804ebba428 (sb_writers#17){.+.+}-{0:0}, at: ksys_pwrite64 fs/read_write.c:793 [inline] #0: ffff88804ebba428 (sb_writers#17){.+.+}-{0:0}, at: __do_sys_pwrite64 fs/read_write.c:801 [inline] #0: ffff88804ebba428 (sb_writers#17){.+.+}-{0:0}, at: __se_sys_pwrite64 fs/read_write.c:798 [inline] #0: ffff88804ebba428 (sb_writers#17){.+.+}-{0:0}, at: __x64_sys_pwrite64+0x1eb/0x250 fs/read_write.c:798 #1: ffff8880525cb480 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff8880525cb480 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: ocfs2_file_write_iter+0x3c5/0x21b0 fs/ocfs2/file.c:2399 #2: ffff8880525cb120 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_write_begin+0x1ac/0x340 fs/ocfs2/aops.c:1880 stack backtrace: CPU: 0 UID: 0 PID: 10727 Comm: syz.1.1024 Not tainted 6.16.0-rc1-syzkaller-00157-g02adc1490e6d #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046 check_noncircular+0x14c/0x170 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+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_write+0x92/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:867 [inline] ocfs2_reserve_local_alloc_bits+0xee/0xc60 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x695/0xe80 fs/ocfs2/suballoc.c:1168 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1229 [inline] ocfs2_lock_allocators+0x337/0x5f0 fs/ocfs2/suballoc.c:2772 ocfs2_write_begin_nolock+0x2834/0x6850 fs/ocfs2/aops.c:1718 ocfs2_write_begin+0x1cb/0x340 fs/ocfs2/aops.c:1882 generic_perform_write+0x3d0/0x930 mm/filemap.c:4112 __generic_file_write_iter+0x1f7/0x240 mm/filemap.c:4229 ocfs2_file_write_iter+0xbc4/0x21b0 fs/ocfs2/file.c:2469 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x6c7/0x1150 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x1eb/0x250 fs/read_write.c:798 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3673f8e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3674e70038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f36741b5fa0 RCX: 00007f3673f8e929 RDX: 00000000200000c1 RSI: 00002000000000c0 RDI: 0000000000000004 RBP: 00007f3674010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f36741b5fa0 R15: 00007ffc53cc24e8