ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.339/7550 is trying to acquire lock: ffff888057e94e38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2f7/0x7a0 fs/ocfs2/acl.c:367 but task is already holding lock: ffff888055b1d4e8 (&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_shutdown_local_alloc+0x200/0xa10 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1e9/0x8b0 fs/ocfs2/super.c:1825 generic_shutdown_super+0x135/0x2c0 fs/super.c:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xbc/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318 task_work_run+0x1d4/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0xff/0x4f0 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x2d0/0xf80 arch/x86/entry/syscall_64.c:100 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.4.339/7550: #0: ffff88802ff96420 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499 #1: ffff888057e95100 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline] #1: ffff888057e95100 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2864 [inline] #1: ffff888057e95100 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2875 [inline] #1: ffff888057e95100 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: filename_create+0x1fb/0x360 fs/namei.c:4878 #2: ffff888057e689c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #2: ffff888057e689c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x164/0x4600 fs/ocfs2/suballoc.c:857 #3: ffff888057e69800 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #3: ffff888057e69800 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x164/0x4600 fs/ocfs2/suballoc.c:857 #4: ffff888057e6b480 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #4: ffff888057e6b480 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24b0 fs/ocfs2/localalloc.c:636 #5: ffff88802ff96610 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_mknod+0xe71/0x2030 fs/ocfs2/namei.c:365 #6: ffff888055b1d4e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:372 #7: ffff888031336950 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1f87/0x21c0 fs/jbd2/transaction.c:444 stack backtrace: CPU: 0 UID: 0 PID: 7550 Comm: syz.4.339 Not tainted syzkaller #0 PREEMPT(full) 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: 0033:0x7f90aa78de97 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:00007f90ab6b1e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f90ab6b1ef0 RCX: 00007f90aa78de97 RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c RBP: 0000200000000080 R08: 0000200000000200 R09: 0000000000000000 R10: 0000200000000080 R11: 0000000000000246 R12: 0000200000000040 R13: 00007f90ab6b1eb0 R14: 0000000000000000 R15: 0000000000000000