====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.7.871/10641 is trying to acquire lock: ffff8880578da378 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2f7/0x7a0 fs/ocfs2/acl.c:367 but task is already holding lock: ffff8880310ce0e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:372 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 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:2462 dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2499 ocfs2_enable_quotas+0x1c6/0x450 fs/ocfs2/super.c:930 ocfs2_fill_super+0x50dd/0x63a0 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (sb_internal#5){.+.+}-{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+0x26b/0x6d0 fs/ocfs2/journal.c:370 ocfs2_xattr_set+0xd69/0x11f0 fs/ocfs2/xattr.c:3674 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x162/0x360 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] file_setxattr+0x1da/0x2b0 fs/xattr.c:646 path_setxattrat+0x327/0x3a0 fs/xattr.c:711 __do_sys_fsetxattr fs/xattr.c:761 [inline] __se_sys_fsetxattr fs/xattr.c:758 [inline] __x64_sys_fsetxattr+0xbc/0xe0 fs/xattr.c:758 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_reserve_suballoc_bits+0x164/0x4600 fs/ocfs2/suballoc.c:857 ocfs2_reserve_new_metadata_blocks+0x403/0x940 fs/ocfs2/suballoc.c:1053 ocfs2_init_xattr_set_ctxt+0x2f7/0x6e0 fs/ocfs2/xattr.c:3308 ocfs2_xattr_set+0xb70/0x11f0 fs/ocfs2/xattr.c:3665 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x162/0x360 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] file_setxattr+0x1da/0x2b0 fs/xattr.c:646 path_setxattrat+0x327/0x3a0 fs/xattr.c:711 __do_sys_fsetxattr fs/xattr.c:761 [inline] __se_sys_fsetxattr fs/xattr.c:758 [inline] __x64_sys_fsetxattr+0xbc/0xe0 fs/xattr.c:758 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 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:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x2f7/0x7a0 fs/ocfs2/acl.c:367 ocfs2_mknod+0x12ff/0x2030 fs/ocfs2/namei.c:414 ocfs2_mkdir+0x181/0x420 fs/ocfs2/namei.c:660 vfs_mkdir+0x414/0x630 fs/namei.c:5196 do_mkdirat+0x276/0x500 fs/namei.c:5230 __do_sys_mkdirat fs/namei.c:5252 [inline] __se_sys_mkdirat fs/namei.c:5250 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5250 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 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 --> 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 *** 8 locks held by syz.7.871/10641: #0: ffff888032aa6420 (sb_writers#28){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499 #1: ffff8880578da640 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline] #1: ffff8880578da640 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2864 [inline] #1: ffff8880578da640 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2875 [inline] #1: ffff8880578da640 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: filename_create+0x1fb/0x360 fs/namei.c:4878 #2: ffff8880491ddf40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #2: ffff8880491ddf40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x164/0x4600 fs/ocfs2/suballoc.c:857 #3: ffff8880490b2640 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #3: ffff8880490b2640 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x164/0x4600 fs/ocfs2/suballoc.c:857 #4: ffff8880491d9800 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #4: ffff8880491d9800 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24b0 fs/ocfs2/localalloc.c:636 #5: ffff888032aa6610 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_mknod+0xe71/0x2030 fs/ocfs2/namei.c:365 #6: ffff8880310ce0e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:372 #7: ffff8880542d6950 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1f87/0x21c0 fs/jbd2/transaction.c:444 stack backtrace: CPU: 1 UID: 0 PID: 10641 Comm: syz.7.871 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x2f7/0x7a0 fs/ocfs2/acl.c:367 ocfs2_mknod+0x12ff/0x2030 fs/ocfs2/namei.c:414 ocfs2_mkdir+0x181/0x420 fs/ocfs2/namei.c:660 vfs_mkdir+0x414/0x630 fs/namei.c:5196 do_mkdirat+0x276/0x500 fs/namei.c:5230 __do_sys_mkdirat fs/namei.c:5252 [inline] __se_sys_mkdirat fs/namei.c:5250 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5250 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2afc38de97 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f2afd163e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f2afd163ef0 RCX: 00007f2afc38de97 RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c RBP: 00002000000002c0 R08: 0000200000000200 R09: 0000000000000000 R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000040 R13: 00007f2afd163eb0 R14: 0000000000000000 R15: 0000000000000000