[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started System Logging Service. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 136.912588][ T8484] ===================================================== [ 136.919550][ T8484] BUG: KMSAN: uninit-value in radix_tree_lookup+0x409/0x420 [ 136.926815][ T8484] CPU: 1 PID: 8484 Comm: syz-executor663 Not tainted 5.9.0-rc8-syzkaller #0 [ 136.935471][ T8484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 136.945518][ T8484] Call Trace: [ 136.948794][ T8484] dump_stack+0x21c/0x280 [ 136.953109][ T8484] kmsan_report+0xf7/0x1e0 [ 136.957508][ T8484] __msan_warning+0x55/0x90 [ 136.962008][ T8484] radix_tree_lookup+0x409/0x420 [ 136.966941][ T8484] qrtr_endpoint_post+0x1172/0x1700 [ 136.972128][ T8484] qrtr_tun_write_iter+0x216/0x370 [ 136.977224][ T8484] ? qrtr_tun_read_iter+0x810/0x810 [ 136.982401][ T8484] vfs_write+0xfba/0x1870 [ 136.986724][ T8484] ksys_write+0x2af/0x4d0 [ 136.991039][ T8484] __se_sys_write+0x92/0xb0 [ 136.995544][ T8484] __x64_sys_write+0x4a/0x70 [ 137.000146][ T8484] do_syscall_64+0x9f/0x140 [ 137.004656][ T8484] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 137.010540][ T8484] RIP: 0033:0x441239 [ 137.014414][ T8484] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 1b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 137.034039][ T8484] RSP: 002b:00007ffdad6a3b88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 137.042430][ T8484] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441239 [ 137.050382][ T8484] RDX: 00000000000000e4 RSI: 0000000020000000 RDI: 0000000000000003 [ 137.058332][ T8484] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 137.066299][ T8484] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401fe0 [ 137.074249][ T8484] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 137.082227][ T8484] [ 137.084556][ T8484] Uninit was created at: [ 137.088832][ T8484] kmsan_save_stack_with_flags+0x3c/0x90 [ 137.094447][ T8484] kmsan_alloc_page+0xce/0x1d0 [ 137.099193][ T8484] __alloc_pages_nodemask+0x84e/0x1040 [ 137.104631][ T8484] page_frag_alloc+0x35b/0x890 [ 137.109379][ T8484] __napi_alloc_skb+0x1c0/0xab0 [ 137.114212][ T8484] page_to_skb+0x142/0x1640 [ 137.118694][ T8484] receive_mergeable+0xedd/0x5cd0 [ 137.123696][ T8484] receive_buf+0x2db/0x2ba0 [ 137.128184][ T8484] virtnet_poll+0xa51/0x1d10 [ 137.132841][ T8484] napi_poll+0x4aa/0x1090 [ 137.137162][ T8484] net_rx_action+0x35c/0xd40 [ 137.141740][ T8484] __do_softirq+0x1b9/0x7ed [ 137.146225][ T8484] ===================================================== [ 137.153149][ T8484] Disabling lock debugging due to kernel taint [ 137.159280][ T8484] Kernel panic - not syncing: panic_on_warn set ... [ 137.165902][ T8484] CPU: 1 PID: 8484 Comm: syz-executor663 Tainted: G B 5.9.0-rc8-syzkaller #0 [ 137.175934][ T8484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 137.185967][ T8484] Call Trace: [ 137.189242][ T8484] dump_stack+0x21c/0x280 [ 137.193555][ T8484] panic+0x4ca/0xed7 [ 137.197448][ T8484] ? add_taint+0x17c/0x210 [ 137.201855][ T8484] kmsan_report+0x1da/0x1e0 [ 137.206358][ T8484] __msan_warning+0x55/0x90 [ 137.210869][ T8484] radix_tree_lookup+0x409/0x420 [ 137.215792][ T8484] qrtr_endpoint_post+0x1172/0x1700 [ 137.220981][ T8484] qrtr_tun_write_iter+0x216/0x370 [ 137.226090][ T8484] ? qrtr_tun_read_iter+0x810/0x810 [ 137.231292][ T8484] vfs_write+0xfba/0x1870 [ 137.235630][ T8484] ksys_write+0x2af/0x4d0 [ 137.239956][ T8484] __se_sys_write+0x92/0xb0 [ 137.244443][ T8484] __x64_sys_write+0x4a/0x70 [ 137.249014][ T8484] do_syscall_64+0x9f/0x140 [ 137.253499][ T8484] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 137.259368][ T8484] RIP: 0033:0x441239 [ 137.263239][ T8484] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 1b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 137.282820][ T8484] RSP: 002b:00007ffdad6a3b88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 137.291208][ T8484] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441239 [ 137.299177][ T8484] RDX: 00000000000000e4 RSI: 0000000020000000 RDI: 0000000000000003 [ 137.307129][ T8484] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 137.315078][ T8484] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401fe0 [ 137.323025][ T8484] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 137.332347][ T8484] Kernel Offset: disabled [ 137.336714][ T8484] Rebooting in 86400 seconds..