loop8: detected capacity change from 0 to 32768 JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,8) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.8.296/6090 is trying to acquire lock: ffff88805ab094a0 (&oi->ip_alloc_sem){+.+.}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xb3/0x360 fs/ocfs2/refcounttree.c:932 but task is already holding lock: ffff88805ab09538 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa1/0x360 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){++++}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_init_acl+0x307/0x770 fs/ocfs2/acl.c:365 ocfs2_mknod+0x15de/0x2510 fs/ocfs2/namei.c:410 ocfs2_create+0x192/0x420 fs/ocfs2/namei.c:674 vfs_create+0x2db/0x460 fs/namei.c:3170 do_mknodat+0x49e/0x630 fs/namei.c:4002 __do_sys_mknodat fs/namei.c:4030 [inline] __se_sys_mknodat fs/namei.c:4027 [inline] __x64_sys_mknodat+0xa5/0xc0 fs/namei.c:4027 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 ocfs2_modify_bh+0xe0/0x4c0 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1499/0x1820 fs/ocfs2/quota_local.c:764 dquot_load_quota_sb+0x72f/0xa80 fs/quota/dquot.c:2485 dquot_load_quota_inode+0x2d3/0x5c0 fs/quota/dquot.c:2522 ocfs2_enable_quotas+0x1c0/0x4a0 fs/ocfs2/super.c:927 ocfs2_fill_super+0x3c9f/0x50c0 fs/ocfs2/super.c:1140 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (sb_internal#4){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_intwrite include/linux/fs.h:1928 [inline] ocfs2_start_trans+0x2a7/0x6f0 fs/ocfs2/journal.c:372 ocfs2_orphan_for_truncate fs/ocfs2/file.c:392 [inline] ocfs2_truncate_file+0x641/0x1540 fs/ocfs2/file.c:496 ocfs2_setattr+0x1545/0x1b40 fs/ocfs2/file.c:1215 notify_change+0xbc6/0xee0 fs/attr.c:505 do_truncate+0x1ac/0x240 fs/open.c:65 handle_truncate fs/namei.c:3273 [inline] do_open fs/namei.c:3620 [inline] path_openat+0x293b/0x2fb0 fs/namei.c:3750 do_filp_open+0x1df/0x400 fs/namei.c:3777 do_sys_openat2+0x14b/0x500 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&oi->ip_alloc_sem){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ocfs2_try_remove_refcount_tree+0xb3/0x360 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xe8e/0x1540 fs/ocfs2/file.c:517 ocfs2_setattr+0x1545/0x1b40 fs/ocfs2/file.c:1215 notify_change+0xbc6/0xee0 fs/attr.c:505 do_truncate+0x1ac/0x240 fs/open.c:65 handle_truncate fs/namei.c:3273 [inline] do_open fs/namei.c:3620 [inline] path_openat+0x293b/0x2fb0 fs/namei.c:3750 do_filp_open+0x1df/0x400 fs/namei.c:3777 do_sys_openat2+0x14b/0x500 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &oi->ip_alloc_sem --> &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(&oi->ip_alloc_sem); *** DEADLOCK *** 3 locks held by syz.8.296/6090: #0: ffff8880613c6460 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff88805ab09808 (&sb->s_type->i_mutex_key#37){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff88805ab09808 (&sb->s_type->i_mutex_key#37){+.+.}-{3:3}, at: do_truncate+0x198/0x240 fs/open.c:63 #2: ffff88805ab09538 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa1/0x360 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 1 PID: 6090 Comm: syz.8.296 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ocfs2_try_remove_refcount_tree+0xb3/0x360 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xe8e/0x1540 fs/ocfs2/file.c:517 ocfs2_setattr+0x1545/0x1b40 fs/ocfs2/file.c:1215 notify_change+0xbc6/0xee0 fs/attr.c:505 do_truncate+0x1ac/0x240 fs/open.c:65 handle_truncate fs/namei.c:3273 [inline] do_open fs/namei.c:3620 [inline] path_openat+0x293b/0x2fb0 fs/namei.c:3750 do_filp_open+0x1df/0x400 fs/namei.c:3777 do_sys_openat2+0x14b/0x500 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f7cdf240e59 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:00007f7cdd49a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f7cdf4b9fa0 RCX: 00007f7cdf240e59 RDX: 000000000000275a RSI: 0000200000000140 RDI: ffffffffffffff9c RBP: 00007f7cdf2d6e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7cdf4ba038 R14: 00007f7cdf4b9fa0 R15: 00007ffcfe8922a8