Warning: Permanently added '10.128.0.204' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 118.741985][ C0] ================================================================== [ 118.750808][ C0] BUG: KASAN: use-after-free in snd_seq_timer_interrupt+0x316/0x380 [ 118.759388][ C0] Read of size 8 at addr ffff888145c1a458 by task syz-executor463/11439 [ 118.768309][ C0] [ 118.770650][ C0] CPU: 0 PID: 11439 Comm: syz-executor463 Not tainted 5.13.0-rc4-syzkaller #0 [ 118.779858][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.790545][ C0] Call Trace: [ 118.793948][ C0] [ 118.796897][ C0] dump_stack+0x141/0x1d7 [ 118.801907][ C0] ? snd_seq_timer_interrupt+0x316/0x380 [ 118.808221][ C0] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 118.815538][ C0] ? snd_seq_timer_interrupt+0x316/0x380 [ 118.821440][ C0] ? snd_seq_timer_interrupt+0x316/0x380 [ 118.827442][ C0] kasan_report.cold+0x7c/0xd8 [ 118.832363][ C0] ? snd_seq_timer_interrupt+0x316/0x380 [ 118.838411][ C0] snd_seq_timer_interrupt+0x316/0x380 [ 118.844054][ C0] snd_timer_process_callbacks+0x1f9/0x2c0 [ 118.850307][ C0] ? snd_seq_timer_set_tick_resolution+0x200/0x200 [ 118.856998][ C0] snd_timer_interrupt.part.0+0x644/0xcf0 [ 118.862754][ C0] snd_timer_s_function+0x14b/0x200 [ 118.867971][ C0] ? snd_timer_interrupt+0xd0/0xd0 [ 118.873229][ C0] call_timer_fn+0x1a5/0x6b0 [ 118.878061][ C0] ? add_timer_on+0x4a0/0x4a0 [ 118.882810][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 118.887660][ C0] ? _find_next_bit+0x1e3/0x260 [ 118.892799][ C0] ? _raw_spin_unlock_irq+0x1f/0x40 [ 118.898293][ C0] ? snd_timer_interrupt+0xd0/0xd0 [ 118.903807][ C0] __run_timers.part.0+0x67c/0xa50 [ 118.909064][ C0] ? call_timer_fn+0x6b0/0x6b0 [ 118.913959][ C0] ? lapic_next_event+0x4d/0x80 [ 118.919116][ C0] ? kvm_sched_clock_read+0x14/0x40 [ 118.924468][ C0] ? sched_clock_cpu+0x18/0x1f0 [ 118.929445][ C0] run_timer_softirq+0xb3/0x1d0 [ 118.934864][ C0] __do_softirq+0x29b/0x9f6 [ 118.940290][ C0] __irq_exit_rcu+0x136/0x200 [ 118.945088][ C0] irq_exit_rcu+0x5/0x20 [ 118.949458][ C0] sysvec_apic_timer_interrupt+0x93/0xc0 [ 118.955292][ C0] [ 118.958355][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 118.964463][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 [ 118.970907][ C0] Code: 74 24 10 e8 3a 46 41 f8 48 89 ef e8 d2 be 41 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 a3 b4 35 f8 65 8b 05 8c b6 e8 76 85 c0 74 0a 5b 5d c3 e8 00 b3 [ 118.991384][ C0] RSP: 0018:ffffc9000c63fa10 EFLAGS: 00000206 [ 118.997568][ C0] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1b925d9 [ 119.005592][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 119.013932][ C0] RBP: ffffffff908fce60 R08: 0000000000000001 R09: 0000000000000001 [ 119.023054][ C0] R10: ffffffff817aec78 R11: 0000000000000000 R12: 1ffffffff211f9cb [ 119.031206][ C0] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 119.040253][ C0] ? trace_hardirqs_on+0x38/0x1c0 [ 119.045486][ C0] debug_check_no_obj_freed+0x20c/0x420 [ 119.051961][ C0] __free_pages_ok+0x254/0xce0 [ 119.057043][ C0] release_pages+0x813/0x2120 [ 119.062087][ C0] ? put_pages_list+0x3e0/0x3e0 [ 119.067023][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 119.073390][ C0] tlb_finish_mmu+0x165/0x8c0 [ 119.078288][ C0] exit_mmap+0x2c2/0x590 [ 119.082537][ C0] ? __ia32_sys_remap_file_pages+0x150/0x150 [ 119.088838][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 119.095645][ C0] ? __khugepaged_exit+0x2d9/0x470 [ 119.100771][ C0] __mmput+0x122/0x470 [ 119.105071][ C0] mmput+0x58/0x60 [ 119.109037][ C0] do_exit+0xb0a/0x2a60 [ 119.113571][ C0] ? mm_update_next_owner+0x7a0/0x7a0 [ 119.119529][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 119.124378][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 119.129249][ C0] do_group_exit+0x125/0x310 [ 119.133862][ C0] __x64_sys_exit_group+0x3a/0x50 [ 119.138980][ C0] do_syscall_64+0x3a/0xb0 [ 119.143429][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 119.149622][ C0] RIP: 0033:0x43eca9 [ 119.153803][ C0] Code: Unable to access opcode bytes at RIP 0x43ec7f. [ 119.161274][ C0] RSP: 002b:00007fff33a2e668 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 119.170140][ C0] RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eca9 [ 119.178912][ C0] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 119.187654][ C0] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 119.195645][ C0] R10: 0000000000000001 R11: 0000000000000246 R12: 00000000004b02f0 [ 119.203723][ C0] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 119.211992][ C0] [ 119.214359][ C0] Allocated by task 11435: [ 119.218801][ C0] kasan_save_stack+0x1b/0x40 [ 119.223694][ C0] __kasan_kmalloc+0x9b/0xd0 [ 119.228497][ C0] snd_seq_queue_alloc+0x51/0x560 [ 119.233530][ C0] snd_seq_ioctl_create_queue+0xa5/0x380 [ 119.239707][ C0] snd_seq_ioctl+0x202/0x3e0 [ 119.244462][ C0] __x64_sys_ioctl+0x193/0x200 [ 119.249230][ C0] do_syscall_64+0x3a/0xb0 [ 119.253657][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 119.259564][ C0] [ 119.261982][ C0] Freed by task 11435: [ 119.266065][ C0] kasan_save_stack+0x1b/0x40 [ 119.270758][ C0] kasan_set_track+0x1c/0x30 [ 119.275522][ C0] kasan_set_free_info+0x20/0x30 [ 119.280490][ C0] __kasan_slab_free+0xfb/0x130 [ 119.285648][ C0] slab_free_freelist_hook+0xdf/0x240 [ 119.291048][ C0] kfree+0xe5/0x7f0 [ 119.294881][ C0] snd_seq_queue_client_leave+0x37/0x1a0 [ 119.300636][ C0] seq_free_client1.part.0+0x10a/0x260 [ 119.306098][ C0] seq_free_client+0x7b/0xf0 [ 119.310704][ C0] snd_seq_release+0x4d/0xe0 [ 119.315478][ C0] __fput+0x288/0x920 [ 119.319577][ C0] task_work_run+0xdd/0x1a0 [ 119.324299][ C0] do_exit+0xbfc/0x2a60 [ 119.328549][ C0] do_group_exit+0x125/0x310 [ 119.333356][ C0] __x64_sys_exit_group+0x3a/0x50 [ 119.338404][ C0] do_syscall_64+0x3a/0xb0 [ 119.342825][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 119.348715][ C0] [ 119.351030][ C0] The buggy address belongs to the object at ffff888145c1a400 [ 119.351030][ C0] which belongs to the cache kmalloc-512 of size 512 [ 119.365176][ C0] The buggy address is located 88 bytes inside of [ 119.365176][ C0] 512-byte region [ffff888145c1a400, ffff888145c1a600) [ 119.378489][ C0] The buggy address belongs to the page: [ 119.384242][ C0] page:ffffea0005170600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145c18 [ 119.394800][ C0] head:ffffea0005170600 order:2 compound_mapcount:0 compound_pincount:0 [ 119.403313][ C0] flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff) [ 119.411541][ C0] raw: 057ff00000010200 ffffea000518eb00 0000000200000002 ffff888011041c80 [ 119.420579][ C0] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 [ 119.429445][ C0] page dumped because: kasan: bad access detected [ 119.435868][ C0] page_owner tracks the page as allocated [ 119.441878][ C0] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 8363542072, free_ts 0 [ 119.460151][ C0] get_page_from_freelist+0x1033/0x2b60 [ 119.465832][ C0] __alloc_pages+0x1b2/0x500 [ 119.470436][ C0] alloc_page_interleave+0x1e/0x1d0 [ 119.475636][ C0] alloc_pages+0x238/0x2a0 [ 119.480079][ C0] allocate_slab+0x2c5/0x4c0 [ 119.484693][ C0] ___slab_alloc+0x4a1/0x810 [ 119.489336][ C0] __slab_alloc.constprop.0+0xa7/0xf0 [ 119.494824][ C0] kmem_cache_alloc_trace+0x2a3/0x2c0 [ 119.500334][ C0] device_add+0x1155/0x2100 [ 119.504864][ C0] tty_register_device_attr+0x395/0x7b0 [ 119.510455][ C0] tty_register_driver+0x428/0x800 [ 119.515587][ C0] pty_init+0x66c/0xe58 [ 119.519885][ C0] do_one_initcall+0x103/0x650 [ 119.524917][ C0] kernel_init_freeable+0x6c4/0x74d [ 119.530229][ C0] kernel_init+0xd/0x1b8 [ 119.534679][ C0] ret_from_fork+0x1f/0x30 [ 119.539127][ C0] page_owner free stack trace missing [ 119.544493][ C0] [ 119.546830][ C0] Memory state around the buggy address: [ 119.552629][ C0] ffff888145c1a300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 119.561408][ C0] ffff888145c1a380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 119.569917][ C0] >ffff888145c1a400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 119.578435][ C0] ^ [ 119.585726][ C0] ffff888145c1a480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 119.594143][ C0] ffff888145c1a500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 119.602523][ C0] ================================================================== [ 119.610819][ C0] Disabling lock debugging due to kernel taint [ 119.617072][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 119.624379][ C0] CPU: 0 PID: 11439 Comm: syz-executor463 Tainted: G B 5.13.0-rc4-syzkaller #0 [ 119.634803][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.645165][ C0] Call Trace: [ 119.648575][ C0] [ 119.651637][ C0] dump_stack+0x141/0x1d7 [ 119.656077][ C0] panic+0x306/0x73d [ 119.660080][ C0] ? __warn_printk+0xf3/0xf3 [ 119.664686][ C0] ? snd_seq_timer_interrupt+0x316/0x380 [ 119.670507][ C0] ? snd_seq_timer_interrupt+0x316/0x380 [ 119.676153][ C0] end_report.cold+0x5a/0x5a [ 119.680747][ C0] kasan_report.cold+0x6a/0xd8 [ 119.685993][ C0] ? snd_seq_timer_interrupt+0x316/0x380 [ 119.691626][ C0] snd_seq_timer_interrupt+0x316/0x380 [ 119.697504][ C0] snd_timer_process_callbacks+0x1f9/0x2c0 [ 119.703488][ C0] ? snd_seq_timer_set_tick_resolution+0x200/0x200 [ 119.710174][ C0] snd_timer_interrupt.part.0+0x644/0xcf0 [ 119.716693][ C0] snd_timer_s_function+0x14b/0x200 [ 119.721983][ C0] ? snd_timer_interrupt+0xd0/0xd0 [ 119.727230][ C0] call_timer_fn+0x1a5/0x6b0 [ 119.732479][ C0] ? add_timer_on+0x4a0/0x4a0 [ 119.737167][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 119.742200][ C0] ? _find_next_bit+0x1e3/0x260 [ 119.747434][ C0] ? _raw_spin_unlock_irq+0x1f/0x40 [ 119.753197][ C0] ? snd_timer_interrupt+0xd0/0xd0 [ 119.758621][ C0] __run_timers.part.0+0x67c/0xa50 [ 119.764039][ C0] ? call_timer_fn+0x6b0/0x6b0 [ 119.768922][ C0] ? lapic_next_event+0x4d/0x80 [ 119.773868][ C0] ? kvm_sched_clock_read+0x14/0x40 [ 119.779056][ C0] ? sched_clock_cpu+0x18/0x1f0 [ 119.784004][ C0] run_timer_softirq+0xb3/0x1d0 [ 119.789123][ C0] __do_softirq+0x29b/0x9f6 [ 119.794174][ C0] __irq_exit_rcu+0x136/0x200 [ 119.798846][ C0] irq_exit_rcu+0x5/0x20 [ 119.803088][ C0] sysvec_apic_timer_interrupt+0x93/0xc0 [ 119.808904][ C0] [ 119.811936][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 119.818273][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 [ 119.824867][ C0] Code: 74 24 10 e8 3a 46 41 f8 48 89 ef e8 d2 be 41 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 a3 b4 35 f8 65 8b 05 8c b6 e8 76 85 c0 74 0a 5b 5d c3 e8 00 b3 [ 119.844759][ C0] RSP: 0018:ffffc9000c63fa10 EFLAGS: 00000206 [ 119.851163][ C0] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1b925d9 [ 119.859588][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 119.867649][ C0] RBP: ffffffff908fce60 R08: 0000000000000001 R09: 0000000000000001 [ 119.875610][ C0] R10: ffffffff817aec78 R11: 0000000000000000 R12: 1ffffffff211f9cb [ 119.883662][ C0] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 119.891641][ C0] ? trace_hardirqs_on+0x38/0x1c0 [ 119.897269][ C0] debug_check_no_obj_freed+0x20c/0x420 [ 119.903067][ C0] __free_pages_ok+0x254/0xce0 [ 119.907844][ C0] release_pages+0x813/0x2120 [ 119.912571][ C0] ? put_pages_list+0x3e0/0x3e0 [ 119.917454][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 119.923706][ C0] tlb_finish_mmu+0x165/0x8c0 [ 119.928391][ C0] exit_mmap+0x2c2/0x590 [ 119.932673][ C0] ? __ia32_sys_remap_file_pages+0x150/0x150 [ 119.938734][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 119.945354][ C0] ? __khugepaged_exit+0x2d9/0x470 [ 119.950525][ C0] __mmput+0x122/0x470 [ 119.955153][ C0] mmput+0x58/0x60 [ 119.959274][ C0] do_exit+0xb0a/0x2a60 [ 119.963522][ C0] ? mm_update_next_owner+0x7a0/0x7a0 [ 119.969181][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 119.974141][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 119.979990][ C0] do_group_exit+0x125/0x310 [ 119.985064][ C0] __x64_sys_exit_group+0x3a/0x50 [ 119.990084][ C0] do_syscall_64+0x3a/0xb0 [ 119.994646][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 120.000575][ C0] RIP: 0033:0x43eca9 [ 120.004750][ C0] Code: Unable to access opcode bytes at RIP 0x43ec7f. [ 120.011966][ C0] RSP: 002b:00007fff33a2e668 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 120.021172][ C0] RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eca9 [ 120.029501][ C0] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 120.037671][ C0] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 120.045770][ C0] R10: 0000000000000001 R11: 0000000000000246 R12: 00000000004b02f0 [ 120.054184][ C0] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 120.063582][ C0] Kernel Offset: disabled [ 120.067905][ C0] Rebooting in 86400 seconds..