loop8: detected capacity change from 0 to 32768 ocfs2: Mounting device (7,8) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 Not tainted ------------------------------------------------------ syz.8.5266/19490 is trying to acquire lock: ffff88806b39dc78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2f9/0x720 fs/ocfs2/acl.c:366 but task is already holding lock: ffff88814caf8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0 fs/jbd2/transaction.c:444 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (jbd2_handle){++++}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 start_this_handle+0x1fa7/0x21c0 fs/jbd2/transaction.c:444 jbd2__journal_start+0x2c1/0x5b0 fs/jbd2/transaction.c:501 jbd2_journal_start+0x2a/0x40 fs/jbd2/transaction.c:540 ocfs2_start_trans+0x376/0x6d0 fs/ocfs2/journal.c:374 ocfs2_modify_bh+0xe8/0x470 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1465/0x17e0 fs/ocfs2/quota_local.c:767 dquot_load_quota_sb+0x791/0xbd0 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x1c6/0x450 fs/ocfs2/super.c:930 ocfs2_fill_super+0x5115/0x63d0 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681 vfs_get_tree+0x92/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #4 (&journal->j_trans_barrier){.+.+}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:372 ocfs2_modify_bh+0xe8/0x470 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1465/0x17e0 fs/ocfs2/quota_local.c:767 dquot_load_quota_sb+0x791/0xbd0 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x1c6/0x450 fs/ocfs2/super.c:930 ocfs2_fill_super+0x5115/0x63d0 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681 vfs_get_tree+0x92/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (sb_internal#3){.+.+}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 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:1795 [inline] sb_start_intwrite include/linux/fs.h:1978 [inline] ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0x711/0x4640 fs/ocfs2/suballoc.c:834 ocfs2_reserve_new_metadata_blocks+0x403/0x940 fs/ocfs2/suballoc.c:984 ocfs2_init_xattr_set_ctxt+0x307/0x700 fs/ocfs2/xattr.c:3277 ocfs2_xattr_set+0xb70/0x11f0 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x274/0x600 fs/xattr.c:665 path_setxattrat+0x364/0x3a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1134 [inline] ocfs2_reserve_clusters_with_limit+0x2fb/0xba0 fs/ocfs2/suballoc.c:1179 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:674 [inline] ocfs2_reserve_suballoc_bits+0x6eb/0x4640 fs/ocfs2/suballoc.c:834 ocfs2_reserve_new_metadata_blocks+0x403/0x940 fs/ocfs2/suballoc.c:984 ocfs2_init_xattr_set_ctxt+0x307/0x700 fs/ocfs2/xattr.c:3277 ocfs2_xattr_set+0xb70/0x11f0 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x274/0x600 fs/xattr.c:665 path_setxattrat+0x364/0x3a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788 ocfs2_reserve_new_metadata_blocks+0x403/0x940 fs/ocfs2/suballoc.c:984 ocfs2_init_xattr_set_ctxt+0x307/0x700 fs/ocfs2/xattr.c:3277 ocfs2_xattr_set+0xb70/0x11f0 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x274/0x600 fs/xattr.c:665 path_setxattrat+0x364/0x3a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 ocfs2_init_acl+0x2f9/0x720 fs/ocfs2/acl.c:366 ocfs2_mknod+0x1321/0x2050 fs/ocfs2/namei.c:410 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x14f4/0x3830 fs/namei.c:4052 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 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 --> &journal->j_trans_barrier --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(jbd2_handle); lock(&journal->j_trans_barrier); lock(jbd2_handle); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.8.5266/19490: #0: ffff888048c3c428 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557 #1: ffff88806b39df40 (&type->i_mutex_dir_key#13){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #1: ffff88806b39df40 (&type->i_mutex_dir_key#13){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3813 [inline] #1: ffff88806b39df40 (&type->i_mutex_dir_key#13){+.+.}-{4:4}, at: path_openat+0x8da/0x3830 fs/namei.c:4052 #2: ffff88806b0d6d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #2: ffff88806b0d6d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788 #3: ffff88806b39c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #3: ffff88806b39c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788 #4: ffff88806b0d09c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #4: ffff88806b0d09c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0 fs/ocfs2/localalloc.c:636 #5: ffff888048c3c618 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_mknod+0xe93/0x2050 fs/ocfs2/namei.c:361 #6: ffff888055a7c4e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:372 #7: ffff88814caf8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0 fs/jbd2/transaction.c:444 stack backtrace: CPU: 1 UID: 0 PID: 19490 Comm: syz.8.5266 Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2046 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 ocfs2_init_acl+0x2f9/0x720 fs/ocfs2/acl.c:366 ocfs2_mknod+0x1321/0x2050 fs/ocfs2/namei.c:410 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x14f4/0x3830 fs/namei.c:4052 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6bcc78e929 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:00007f6bca5f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f6bcc9b5fa0 RCX: 00007f6bcc78e929 RDX: 0000000000000000 RSI: 0000000000145142 RDI: 0000200000000240 RBP: 00007f6bcc810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6bcc9b5fa0 R15: 00007ffd9bd25cf8