Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. 2020/04/28 11:00:55 fuzzer started 2020/04/28 11:00:56 connecting to host at 10.128.0.26:34845 2020/04/28 11:00:56 checking machine... 2020/04/28 11:00:56 checking revisions... 2020/04/28 11:00:56 testing simple program... syzkaller login: [ 55.570688][ T7037] IPVS: ftp: loaded support on port[0] = 21 2020/04/28 11:00:57 building call list... [ 55.982010][ T165] tipc: TX() has been purged, node left! [ 57.391492][ T7014] can: request_module (can-proto-0) failed. executing program [ 59.066123][ T7014] can: request_module (can-proto-0) failed. [ 59.077497][ T7014] can: request_module (can-proto-0) failed. [ 59.542517][ T7014] ================================================================== [ 59.552381][ T7014] BUG: KASAN: null-ptr-deref in x25_disconnect+0x253/0x370 [ 59.559782][ T7014] Write of size 4 at addr 00000000000000d8 by task syz-fuzzer/7014 [ 59.567902][ T7014] [ 59.570222][ T7014] CPU: 1 PID: 7014 Comm: syz-fuzzer Not tainted 5.7.0-rc2-syzkaller #0 [ 59.578910][ T7014] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.589389][ T7014] Call Trace: [ 59.592965][ T7014] dump_stack+0x188/0x20d [ 59.597709][ T7014] ? x25_disconnect+0x253/0x370 [ 59.604101][ T7014] ? __sock_release+0x280/0x280 [ 59.609618][ T7014] __kasan_report.cold+0x5/0x4d [ 59.615785][ T7014] ? rcu_read_lock_held+0x1/0xb0 [ 59.622651][ T7014] ? x25_disconnect+0x253/0x370 [ 59.628046][ T7014] ? x25_disconnect+0x253/0x370 [ 59.633137][ T7014] kasan_report+0x33/0x50 [ 59.637691][ T7014] check_memory_region+0x141/0x190 [ 59.643266][ T7014] x25_disconnect+0x253/0x370 [ 59.647963][ T7014] x25_release+0x345/0x420 [ 59.652690][ T7014] __sock_release+0xcd/0x280 [ 59.657545][ T7014] sock_close+0x18/0x20 [ 59.662391][ T7014] __fput+0x33e/0x880 [ 59.666366][ T7014] task_work_run+0xf4/0x1b0 [ 59.670866][ T7014] exit_to_usermode_loop+0x2fa/0x360 [ 59.676145][ T7014] do_syscall_64+0x6b1/0x7d0 [ 59.680805][ T7014] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.687011][ T7014] RIP: 0033:0x4afb40 [ 59.691254][ T7014] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 59.713824][ T7014] RSP: 002b:000000c0001bb4f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 59.722432][ T7014] RAX: 0000000000000000 RBX: 000000c00002e500 RCX: 00000000004afb40 [ 59.730943][ T7014] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 59.739430][ T7014] RBP: 000000c0001bb538 R08: 0000000000000000 R09: 0000000000000000 [ 59.747797][ T7014] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 59.756594][ T7014] R13: 0000000000000163 R14: 0000000000000162 R15: 0000000000000200 [ 59.765477][ T7014] ================================================================== [ 59.774008][ T7014] Disabling lock debugging due to kernel taint [ 59.781128][ T7014] Kernel panic - not syncing: panic_on_warn set ... [ 59.788041][ T7014] CPU: 1 PID: 7014 Comm: syz-fuzzer Tainted: G B 5.7.0-rc2-syzkaller #0 [ 59.799105][ T7014] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.811008][ T7014] Call Trace: [ 59.815548][ T7014] dump_stack+0x188/0x20d [ 59.820821][ T7014] ? __sock_release+0x280/0x280 [ 59.826635][ T7014] panic+0x2e3/0x75c [ 59.831877][ T7014] ? add_taint.cold+0x16/0x16 [ 59.838570][ T7014] ? x25_disconnect+0x253/0x370 [ 59.844124][ T7014] ? trace_hardirqs_on+0x55/0x220 [ 59.850245][ T7014] ? x25_disconnect+0x253/0x370 [ 59.857275][ T7014] ? __sock_release+0x280/0x280 [ 59.862128][ T7014] end_report+0x4d/0x53 [ 59.866388][ T7014] __kasan_report.cold+0xd/0x4d [ 59.872983][ T7014] ? rcu_read_lock_held+0x1/0xb0 [ 59.880943][ T7014] ? x25_disconnect+0x253/0x370 [ 59.886039][ T7014] ? x25_disconnect+0x253/0x370 [ 59.891928][ T7014] kasan_report+0x33/0x50 [ 59.896907][ T7014] check_memory_region+0x141/0x190 [ 59.902977][ T7014] x25_disconnect+0x253/0x370 [ 59.908309][ T7014] x25_release+0x345/0x420 [ 59.913077][ T7014] __sock_release+0xcd/0x280 [ 59.918207][ T7014] sock_close+0x18/0x20 [ 59.923776][ T7014] __fput+0x33e/0x880 [ 59.927757][ T7014] task_work_run+0xf4/0x1b0 [ 59.932491][ T7014] exit_to_usermode_loop+0x2fa/0x360 [ 59.937951][ T7014] do_syscall_64+0x6b1/0x7d0 [ 59.943136][ T7014] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.950254][ T7014] RIP: 0033:0x4afb40 [ 59.954533][ T7014] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 59.977251][ T7014] RSP: 002b:000000c0001bb4f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 59.992778][ T7014] RAX: 0000000000000000 RBX: 000000c00002e500 RCX: 00000000004afb40 [ 60.001746][ T7014] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 60.010313][ T7014] RBP: 000000c0001bb538 R08: 0000000000000000 R09: 0000000000000000 [ 60.018371][ T7014] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 60.026382][ T7014] R13: 0000000000000163 R14: 0000000000000162 R15: 0000000000000200 [ 60.036413][ T7014] Kernel Offset: disabled [ 60.040837][ T7014] Rebooting in 86400 seconds..