loop7: detected capacity change from 0 to 32768 ocfs2: Mounting device (7,7) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.7.18898/15981 is trying to acquire lock: ffff888060e5ba10 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xb6/0x340 fs/ocfs2/refcounttree.c:932 but task is already holding lock: ffff888060e5ba98 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x340 fs/ocfs2/refcounttree.c:931 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: 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:5250 filename_mkdirat+0x289/0x520 fs/namei.c:5283 __do_sys_mkdirat fs/namei.c:5304 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5301 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&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+0x5345/0x6960 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1693 vfs_get_tree+0x92/0x2a0 fs/super.c:1753 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3839 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4388 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4365 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#3){.+.+}-{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_write_begin_inline fs/ocfs2/aops.c:1460 [inline] ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1564 [inline] ocfs2_write_begin_nolock+0x2057/0x41a0 fs/ocfs2/aops.c:1650 ocfs2_write_begin+0x1c5/0x320 fs/ocfs2/aops.c:1885 generic_perform_write+0x2af/0x8b0 mm/filemap.c:4340 ocfs2_file_write_iter+0x1666/0x1e70 fs/ocfs2/file.c:2481 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x629/0xba0 fs/read_write.c:688 ksys_write+0x156/0x270 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{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_write+0x3a/0x50 kernel/locking/rwsem.c:1625 ocfs2_try_remove_refcount_tree+0xb6/0x340 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xe9c/0x14a0 fs/ocfs2/file.c:527 ocfs2_setattr+0x15e5/0x1ca0 fs/ocfs2/file.c:1224 notify_change+0xc18/0xf60 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 do_ftruncate+0x49c/0x550 fs/open.c:194 ksys_ftruncate fs/open.c:206 [inline] __do_sys_ftruncate fs/open.c:211 [inline] __se_sys_ftruncate fs/open.c:209 [inline] __x64_sys_ftruncate+0x8f/0xe0 fs/open.c:209 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 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_file_ip_alloc_sem_key --> &journal->j_trans_barrier --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 3 locks held by syz.7.18898/15981: #0: ffff888025ac6480 (sb_writers#15){.+.+}-{0:0}, at: class_super_write_constructor include/linux/fs/super.h:128 [inline] #0: ffff888025ac6480 (sb_writers#15){.+.+}-{0:0}, at: do_ftruncate+0x44d/0x550 fs/open.c:193 #1: ffff888060e5bdc0 (&sb->s_type->i_mutex_key#41){++++}-{4:4}, at: inode_lock_killable include/linux/fs.h:1029 [inline] #1: ffff888060e5bdc0 (&sb->s_type->i_mutex_key#41){++++}-{4:4}, at: do_truncate+0x18f/0x250 fs/open.c:63 #2: ffff888060e5ba98 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x340 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 1 UID: 0 PID: 15981 Comm: syz.7.18898 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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_write+0x3a/0x50 kernel/locking/rwsem.c:1625 ocfs2_try_remove_refcount_tree+0xb6/0x340 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xe9c/0x14a0 fs/ocfs2/file.c:527 ocfs2_setattr+0x15e5/0x1ca0 fs/ocfs2/file.c:1224 notify_change+0xc18/0xf60 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 do_ftruncate+0x49c/0x550 fs/open.c:194 ksys_ftruncate fs/open.c:206 [inline] __do_sys_ftruncate fs/open.c:211 [inline] __se_sys_ftruncate fs/open.c:209 [inline] __x64_sys_ftruncate+0x8f/0xe0 fs/open.c:209 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd8c9cbce59 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:00007fd8c7f0e028 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 00007fd8c9f35fa0 RCX: 00007fd8c9cbce59 RDX: 0000000000000000 RSI: 00000000000000ee RDI: 0000000000000005 RBP: 00007fd8c9d52d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd8c9f36038 R14: 00007fd8c9f35fa0 R15: 00007ffd38e3a878