====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.2.3308/20315 is trying to acquire lock: ffff8880542786f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 but task is already holding lock: ffff888079f434e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ae/0x970 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+0x9b/0x460 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:372 ocfs2_shutdown_local_alloc+0x281/0xa10 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1f5/0x9d0 fs/ocfs2/super.c:1825 generic_shutdown_super+0x156/0x390 fs/super.c:643 kill_block_super+0x3b/0x90 fs/super.c:1722 deactivate_locked_super+0xc1/0x1a0 fs/super.c:474 deactivate_super fs/super.c:507 [inline] deactivate_super+0xde/0x100 fs/super.c:503 cleanup_mnt+0x225/0x450 fs/namespace.c:1318 task_work_run+0x150/0x240 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+0xfb/0x540 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+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (sb_internal#4){.+.+}-{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+0x29d/0x970 fs/ocfs2/journal.c:370 ocfs2_xattr_set+0x12f2/0x2a50 fs/ocfs2/xattr.c:3673 ocfs2_set_acl+0x46d/0x550 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x224/0x2d0 fs/ocfs2/acl.c:287 set_posix_acl+0x25f/0x320 fs/posix_acl.c:954 vfs_set_acl+0x44a/0x920 fs/posix_acl.c:1133 do_set_acl+0xd9/0x1a0 fs/posix_acl.c:1278 do_setxattr+0xeb/0x180 fs/xattr.c:633 file_setxattr fs/xattr.c:646 [inline] file_setxattr+0x139/0x1b0 fs/xattr.c:640 path_setxattrat+0x247/0x2a0 fs/xattr.c:711 __do_sys_fsetxattr fs/xattr.c:761 [inline] __se_sys_fsetxattr fs/xattr.c:758 [inline] __x64_sys_fsetxattr+0xc5/0x140 fs/xattr.c:758 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/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+0x92/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [inline] ocfs2_reserve_suballoc_bits+0x11c/0x4830 fs/ocfs2/suballoc.c:789 ocfs2_reserve_new_metadata_blocks+0x52c/0xc70 fs/ocfs2/suballoc.c:985 ocfs2_init_xattr_set_ctxt fs/ocfs2/xattr.c:3307 [inline] ocfs2_xattr_set+0x184c/0x2a50 fs/ocfs2/xattr.c:3664 ocfs2_set_acl+0x46d/0x550 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x224/0x2d0 fs/ocfs2/acl.c:287 set_posix_acl+0x25f/0x320 fs/posix_acl.c:954 vfs_set_acl+0x44a/0x920 fs/posix_acl.c:1133 do_set_acl+0xd9/0x1a0 fs/posix_acl.c:1278 do_setxattr+0xeb/0x180 fs/xattr.c:633 file_setxattr fs/xattr.c:646 [inline] file_setxattr+0x139/0x1b0 fs/xattr.c:640 path_setxattrat+0x247/0x2a0 fs/xattr.c:711 __do_sys_fsetxattr fs/xattr.c:761 [inline] __se_sys_fsetxattr fs/xattr.c:758 [inline] __x64_sys_fsetxattr+0xc5/0x140 fs/xattr.c:758 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/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+0x1669/0x2890 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825 down_read+0x9b/0x460 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 ocfs2_mknod+0xd2f/0x2510 fs/ocfs2/namei.c:414 ocfs2_create+0x17c/0x430 fs/ocfs2/namei.c:677 lookup_open.isra.0+0x12dc/0x1780 fs/namei.c:4440 open_last_lookups fs/namei.c:4540 [inline] path_openat+0xa95/0x3140 fs/namei.c:4784 do_filp_open+0x20b/0x470 fs/namei.c:4814 do_sys_openat2+0x121/0x290 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/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#4 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#4); lock(&journal->j_trans_barrier); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.2.3308/20315: #0: ffff888064310420 (sb_writers#28){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:4529 [inline] #0: ffff888064310420 (sb_writers#28){.+.+}-{0:0}, at: path_openat+0x183a/0x3140 fs/namei.c:4784 #1: ffff8880542789c0 (&type->i_mutex_dir_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #1: ffff8880542789c0 (&type->i_mutex_dir_key#20){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:4537 [inline] #1: ffff8880542789c0 (&type->i_mutex_dir_key#20){+.+.}-{4:4}, at: path_openat+0xa22/0x3140 fs/namei.c:4784 #2: ffff8880543fb480 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #2: ffff8880543fb480 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4830 fs/ocfs2/suballoc.c:789 #3: ffff8880543f9800 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #3: ffff8880543f9800 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4830 fs/ocfs2/suballoc.c:789 #4: ffff888042723480 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #4: ffff888042723480 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0xec/0xbf0 fs/ocfs2/localalloc.c:636 #5: ffff888064310610 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_mknod+0xbec/0x2510 fs/ocfs2/namei.c:365 #6: ffff888079f434e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:372 #7: ffff8880611b2950 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x5e7/0x1410 fs/jbd2/transaction.c:444 stack backtrace: CPU: 0 UID: 0 PID: 20315 Comm: syz.2.3308 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 lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x340 kernel/locking/lockdep.c:2043 check_noncircular+0x146/0x160 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+0x1669/0x2890 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825 down_read+0x9b/0x460 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 ocfs2_mknod+0xd2f/0x2510 fs/ocfs2/namei.c:414 ocfs2_create+0x17c/0x430 fs/ocfs2/namei.c:677 lookup_open.isra.0+0x12dc/0x1780 fs/namei.c:4440 open_last_lookups fs/namei.c:4540 [inline] path_openat+0xa95/0x3140 fs/namei.c:4784 do_filp_open+0x20b/0x470 fs/namei.c:4814 do_sys_openat2+0x121/0x290 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f088ab8f749 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:00007f088b9d3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f088ade5fa0 RCX: 00007f088ab8f749 RDX: 0000000000042043 RSI: 0000200000000640 RDI: ffffffffffffff9c RBP: 00007f088ac13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000082 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f088ade6038 R14: 00007f088ade5fa0 R15: 00007ffc43a7e318