[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.63' (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 syzkaller login: [ 49.745316] nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.386313] ================================================================== [ 50.393722] BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 [ 50.400390] Read of size 8 at addr ffff8880a3235e78 by task syz-executor144/8389 [ 50.407924] [ 50.409560] CPU: 1 PID: 8389 Comm: syz-executor144 Not tainted 4.19.211-syzkaller #0 [ 50.417528] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 50.426879] Call Trace: [ 50.429472] dump_stack+0x1fc/0x2ef executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.433106] print_address_description.cold+0x54/0x219 [ 50.438389] kasan_report_error.cold+0x8a/0x1b9 [ 50.443063] ? __lock_acquire+0x2cb4/0x3ff0 [ 50.447398] __asan_report_load8_noabort+0x88/0x90 [ 50.452336] ? lockdep_hardirqs_on+0x3a0/0x5c0 [ 50.456926] ? __lock_acquire+0x2cb4/0x3ff0 [ 50.461256] __lock_acquire+0x2cb4/0x3ff0 [ 50.465423] ? __schedule+0x88f/0x2040 [ 50.469321] ? mark_held_locks+0xf0/0xf0 [ 50.473390] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.478153] ? lockdep_hardirqs_on+0x3a8/0x5c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.482747] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.487508] ? retint_kernel+0x2d/0x2d [ 50.491405] ? psock_map_pop.constprop.0+0x181/0x1f0 [ 50.496522] lock_acquire+0x170/0x3c0 [ 50.500334] ? bpf_tcp_remove+0x427/0xa00 [ 50.504492] _raw_spin_lock_bh+0x2f/0x40 [ 50.508567] ? bpf_tcp_remove+0x427/0xa00 [ 50.512726] bpf_tcp_remove+0x427/0xa00 [ 50.516708] ? tcp_check_oom+0x520/0x520 [ 50.520783] bpf_tcp_close+0x12b/0x390 [ 50.524695] inet_release+0xd7/0x1e0 [ 50.528508] __sock_release+0xcd/0x2a0 [ 50.532406] ? __sock_release+0x2a0/0x2a0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.536562] sock_close+0x15/0x20 [ 50.540019] __fput+0x2ce/0x890 [ 50.543307] task_work_run+0x148/0x1c0 [ 50.547579] do_exit+0xbf3/0x2be0 [ 50.551053] ? lock_downgrade+0x720/0x720 [ 50.555204] ? mm_update_next_owner+0x650/0x650 [ 50.559876] ? up_read+0x17/0x110 [ 50.563335] ? __do_page_fault+0x180/0xd60 [ 50.567573] do_group_exit+0x125/0x310 [ 50.571466] __x64_sys_exit_group+0x3a/0x50 [ 50.575800] do_syscall_64+0xf9/0x620 [ 50.579618] entry_SYSCALL_64_after_hwframe+0x49/0xbe executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.584806] RIP: 0033:0x7f165fa2fc19 [ 50.588608] Code: 00 49 c7 c0 c0 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 [ 50.607512] RSP: 002b:00007fff20a59848 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 50.615223] RAX: ffffffffffffffda RBX: 00007f165faa4330 RCX: 00007f165fa2fc19 [ 50.622491] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 50.629764] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.637036] R10: 0000000000000010 R11: 0000000000000246 R12: 00007f165faa4330 [ 50.644309] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 50.651579] [ 50.653203] Allocated by task 8389: [ 50.656834] kmem_cache_alloc_trace+0x12f/0x380 [ 50.661526] sock_map_alloc+0x2b8/0x510 [ 50.665508] __se_sys_bpf+0x82a/0x3a20 [ 50.669401] do_syscall_64+0xf9/0x620 [ 50.673209] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.678391] [ 50.680014] Freed by task 8141: [ 50.683296] kfree+0xcc/0x210 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.686408] process_one_work+0x864/0x1570 [ 50.690645] worker_thread+0x64c/0x1130 [ 50.694624] kthread+0x33f/0x460 [ 50.697998] ret_from_fork+0x24/0x30 [ 50.701794] [ 50.703425] The buggy address belongs to the object at ffff8880a3235d40 [ 50.703425] which belongs to the cache kmalloc-512 of size 512 [ 50.716090] The buggy address is located 312 bytes inside of [ 50.716090] 512-byte region [ffff8880a3235d40, ffff8880a3235f40) [ 50.727981] The buggy address belongs to the page: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.732931] page:ffffea00028c8d40 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 [ 50.741221] flags: 0xfff00000000100(slab) [ 50.745374] raw: 00fff00000000100 ffffea0002874208 ffffea0002a52c88 ffff88813bff0940 [ 50.753259] raw: 0000000000000000 ffff8880a32350c0 0000000100000006 0000000000000000 [ 50.761140] page dumped because: kasan: bad access detected [ 50.766842] [ 50.768467] Memory state around the buggy address: [ 50.773396] ffff8880a3235d00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 50.780759] ffff8880a3235d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.788118] >ffff8880a3235e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.795481] ^ [ 50.802792] ffff8880a3235e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.810156] ffff8880a3235f00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.817511] ================================================================== [ 50.824863] Disabling lock debugging due to kernel taint [ 50.830309] Kernel panic - not syncing: panic_on_warn set ... [ 50.830309] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.837674] CPU: 1 PID: 8389 Comm: syz-executor144 Tainted: G B 4.19.211-syzkaller #0 [ 50.846947] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 50.856300] Call Trace: [ 50.858905] dump_stack+0x1fc/0x2ef [ 50.862551] panic+0x26a/0x50e [ 50.865748] ? __warn_printk+0xf3/0xf3 [ 50.869646] ? lock_downgrade+0x720/0x720 [ 50.873804] ? print_shadow_for_address+0xb8/0x114 [ 50.878803] ? trace_hardirqs_off+0x64/0x200 [ 50.883221] kasan_end_report+0x43/0x49 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.887205] kasan_report_error.cold+0xa7/0x1b9 [ 50.891923] ? __lock_acquire+0x2cb4/0x3ff0 [ 50.896252] __asan_report_load8_noabort+0x88/0x90 [ 50.901190] ? lockdep_hardirqs_on+0x3a0/0x5c0 [ 50.905782] ? __lock_acquire+0x2cb4/0x3ff0 [ 50.910115] __lock_acquire+0x2cb4/0x3ff0 [ 50.914274] ? __schedule+0x88f/0x2040 [ 50.918170] ? mark_held_locks+0xf0/0xf0 [ 50.922244] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.927014] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 50.931602] ? trace_hardirqs_on_thunk+0x1a/0x1c executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.936369] ? retint_kernel+0x2d/0x2d [ 50.940269] ? psock_map_pop.constprop.0+0x181/0x1f0 [ 50.945382] lock_acquire+0x170/0x3c0 [ 50.949190] ? bpf_tcp_remove+0x427/0xa00 [ 50.953344] _raw_spin_lock_bh+0x2f/0x40 [ 50.957413] ? bpf_tcp_remove+0x427/0xa00 [ 50.961567] bpf_tcp_remove+0x427/0xa00 [ 50.965551] ? tcp_check_oom+0x520/0x520 [ 50.969625] bpf_tcp_close+0x12b/0x390 [ 50.973519] inet_release+0xd7/0x1e0 [ 50.977255] __sock_release+0xcd/0x2a0 [ 50.981164] ? __sock_release+0x2a0/0x2a0 [ 50.985325] sock_close+0x15/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.988789] __fput+0x2ce/0x890 [ 50.992076] task_work_run+0x148/0x1c0 [ 50.995967] do_exit+0xbf3/0x2be0 [ 50.999428] ? lock_downgrade+0x720/0x720 [ 51.003580] ? mm_update_next_owner+0x650/0x650 [ 51.008259] ? up_read+0x17/0x110 [ 51.011726] ? __do_page_fault+0x180/0xd60 [ 51.015977] do_group_exit+0x125/0x310 [ 51.019869] __x64_sys_exit_group+0x3a/0x50 [ 51.024195] do_syscall_64+0xf9/0x620 [ 51.028017] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.033207] RIP: 0033:0x7f165fa2fc19 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 51.036920] Code: 00 49 c7 c0 c0 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 [ 51.055947] RSP: 002b:00007fff20a59848 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 51.063657] RAX: ffffffffffffffda RBX: 00007f165faa4330 RCX: 00007f165fa2fc19 [ 51.070925] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 51.078205] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 executing program executing program executing program executing program [ 51.085480] R10: 0000000000000010 R11: 0000000000000246 R12: 00007f165faa4330 [ 51.092844] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 51.100294] Kernel Offset: disabled [ 51.103909] Rebooting in 86400 seconds..