===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.1/279 is trying to release lock (rcu_read_lock) at: [] __wait_on_freeing_inode+0x105/0x350 but there are no more locks to release! other info that might help us debug this: 4 locks held by syz-executor.1/279: #0: ffff88800f8ac3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b952078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f886950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe32/0x12d0 #3: ffffffff85c16898 (inode_hash_lock){+.+.}-{3:3}, at: insert_inode_locked+0xf9/0x890 stack backtrace: CPU: 1 UID: 0 PID: 279 Comm: syz-executor.1 Not tainted 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 print_unlock_imbalance_bug+0x118/0x130 lock_release+0x1ee/0x270 __wait_on_freeing_inode+0x10a/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffb2cc6ac27 Code: 73 01 c3 48 c7 c1 bc 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 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff0815fe88 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff0815ff10 RCX: 00007ffb2cc6ac27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff0815ff10 RBP: 00007fff0815feec R08: 0000000000000000 R09: 0000000000000005 R10: 00007fff0815fc25 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000ff057 R14: 0000000000000001 R15: 00007fff0815ff50 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.1/279 Modules linked in: CPU: 1 UID: 0 PID: 279 Comm: syz-executor.1 Not tainted 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 d6 b7 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88801a21b700 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff88801a21bafc RBP: ffff88801a21b700 R08: ffffffff81893b1d R09: ffffffff84e98ac0 R10: 0000000000000000 R11: 000000000000029c R12: ffff88801a21b700 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 00005555862ba400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc9f5d7c88 CR3: 000000000e0f2000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: sched_tick+0x232/0x6e0 update_process_times+0x116/0x210 tick_nohz_handler+0x4ff/0x8c0 __hrtimer_run_queues+0x654/0xbb0 hrtimer_interrupt+0x369/0x830 __sysvec_apic_timer_interrupt+0xbb/0x300 sysvec_apic_timer_interrupt+0x6b/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:write_comp_data+0x17/0xa0 Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 65 8b 05 76 64 38 06 65 48 8b 15 56 64 38 06 a9 00 01 ff 00 <74> 27 f6 c4 01 74 1d a9 00 00 0f 00 75 16 a9 00 00 f0 00 74 05 e9 RSP: 0018:ffff88801a097788 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffffffff86678340 RCX: ffffffff84c54bdf RDX: ffff88801a21b700 RSI: ffffffff815d742f RDI: 0000000000000006 RBP: ffffffff8126edd1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8126edd1 R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4cf/0x5b0 report_bug+0x7c/0x120 handle_bug+0x2e8/0x4f0 exc_invalid_op+0x35/0x80 asm_exc_invalid_op+0x1a/0x20 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 d6 b7 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88801a0979e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801a21b700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801a21bafc RBP: ffff88801a21b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801a21b700 R13: 0000000000000001 R14: ffffffff85c10170 R15: ffff8880497e8ca0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffb2cc6ac27 Code: 73 01 c3 48 c7 c1 bc 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 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff0815fe88 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff0815ff10 RCX: 00007ffb2cc6ac27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff0815ff10 RBP: 00007fff0815feec R08: 0000000000000000 R09: 0000000000000005 R10: 00007fff0815fc25 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000ff057 R14: 0000000000000001 R15: 00007fff0815ff50 irq event stamp: 1032491 hardirqs last enabled at (1032491): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1032490): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1032486): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1032484): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 8248 Comm: syz-executor.0 Tainted: G W 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 __kmalloc_noprof+0xd6/0x830 alloc_trace_kprobe+0x375/0x550 create_local_trace_kprobe+0x73/0x410 perf_kprobe_init+0x119/0x210 perf_kprobe_event_init+0xfc/0x1d0 perf_try_init_event+0x140/0x9f0 perf_event_alloc.part.0+0x1130/0x4640 __do_sys_perf_event_open+0x70b/0x2c20 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9571595b19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f956eb0b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f95716a8f60 RCX: 00007f9571595b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f956eb0b1d0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffcf238ebff R14: 00007f956eb0b300 R15: 0000000000022000 trace_kprobe: Failed to allocate trace_probe.(-12) ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 90 90 90 90 90 add %dl,-0x6f6f6f70(%rax) 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 49 89 d2 mov %rdx,%r10 16: 65 8b 05 76 64 38 06 mov %gs:0x6386476(%rip),%eax # 0x6386493 1d: 65 48 8b 15 56 64 38 mov %gs:0x6386456(%rip),%rdx # 0x638647b 24: 06 25: a9 00 01 ff 00 test $0xff0100,%eax * 2a: 74 27 je 0x53 <-- trapping instruction 2c: f6 c4 01 test $0x1,%ah 2f: 74 1d je 0x4e 31: a9 00 00 0f 00 test $0xf0000,%eax 36: 75 16 jne 0x4e 38: a9 00 00 f0 00 test $0xf00000,%eax 3d: 74 05 je 0x44 3f: e9 .byte 0xe9