Warning: Permanently added '10.128.0.185' (ECDSA) to the list of known hosts. 2020/05/02 11:11:24 fuzzer started 2020/05/02 11:11:24 connecting to host at 10.128.0.26:45373 2020/05/02 11:11:24 checking machine... 2020/05/02 11:11:24 checking revisions... 2020/05/02 11:11:24 testing simple program... syzkaller login: [ 57.152332][ T7034] IPVS: ftp: loaded support on port[0] = 21 2020/05/02 11:11:24 building call list... [ 57.532018][ T21] tipc: TX() has been purged, node left! [ 58.758434][ T7021] can: request_module (can-proto-0) failed. executing program [ 60.987067][ T7021] can: request_module (can-proto-0) failed. [ 60.998667][ T7021] can: request_module (can-proto-0) failed. [ 61.421427][ T7021] ================================================================== [ 61.429635][ T7021] BUG: KASAN: null-ptr-deref in x25_disconnect+0x253/0x370 [ 61.436956][ T7021] Write of size 4 at addr 00000000000000d8 by task syz-fuzzer/7021 [ 61.444912][ T7021] [ 61.447226][ T7021] CPU: 0 PID: 7021 Comm: syz-fuzzer Not tainted 5.7.0-rc2-syzkaller #0 [ 61.455445][ T7021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.465497][ T7021] Call Trace: [ 61.468777][ T7021] dump_stack+0x188/0x20d [ 61.473090][ T7021] ? x25_disconnect+0x253/0x370 [ 61.477935][ T7021] ? __sock_release+0x280/0x280 [ 61.482763][ T7021] __kasan_report.cold+0x5/0x4d [ 61.487615][ T7021] ? rcu_read_lock_held+0x1/0xb0 [ 61.492528][ T7021] ? x25_disconnect+0x253/0x370 [ 61.497355][ T7021] ? x25_disconnect+0x253/0x370 [ 61.502189][ T7021] kasan_report+0x33/0x50 [ 61.506497][ T7021] check_memory_region+0x141/0x190 [ 61.511604][ T7021] x25_disconnect+0x253/0x370 [ 61.516269][ T7021] x25_release+0x345/0x420 [ 61.520665][ T7021] __sock_release+0xcd/0x280 [ 61.525258][ T7021] sock_close+0x18/0x20 [ 61.529410][ T7021] __fput+0x33e/0x880 [ 61.533387][ T7021] task_work_run+0xf4/0x1b0 [ 61.537874][ T7021] exit_to_usermode_loop+0x2fa/0x360 [ 61.543142][ T7021] do_syscall_64+0x6b1/0x7d0 [ 61.547725][ T7021] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.553598][ T7021] RIP: 0033:0x4afb40 [ 61.557478][ T7021] 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 [ 61.578533][ T7021] RSP: 002b:000000c0000794f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 61.586917][ T7021] RAX: 0000000000000000 RBX: 000000c00002c000 RCX: 00000000004afb40 [ 61.594865][ T7021] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 61.602824][ T7021] RBP: 000000c000079538 R08: 0000000000000000 R09: 0000000000000000 [ 61.610772][ T7021] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 61.618725][ T7021] R13: 0000000000000162 R14: 0000000000000161 R15: 0000000000000200 [ 61.626680][ T7021] ================================================================== [ 61.634712][ T7021] Disabling lock debugging due to kernel taint [ 61.640917][ T7021] Kernel panic - not syncing: panic_on_warn set ... [ 61.647506][ T7021] CPU: 0 PID: 7021 Comm: syz-fuzzer Tainted: G B 5.7.0-rc2-syzkaller #0 [ 61.657118][ T7021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.667584][ T7021] Call Trace: [ 61.670883][ T7021] dump_stack+0x188/0x20d [ 61.675247][ T7021] ? __sock_release+0x280/0x280 [ 61.680181][ T7021] panic+0x2e3/0x75c [ 61.684062][ T7021] ? add_taint.cold+0x16/0x16 [ 61.688727][ T7021] ? x25_disconnect+0x253/0x370 [ 61.693569][ T7021] ? trace_hardirqs_on+0x55/0x220 [ 61.698577][ T7021] ? x25_disconnect+0x253/0x370 [ 61.703419][ T7021] ? __sock_release+0x280/0x280 [ 61.708250][ T7021] end_report+0x4d/0x53 [ 61.712378][ T7021] __kasan_report.cold+0xd/0x4d [ 61.717199][ T7021] ? rcu_read_lock_held+0x1/0xb0 [ 61.722232][ T7021] ? x25_disconnect+0x253/0x370 [ 61.727064][ T7021] ? x25_disconnect+0x253/0x370 [ 61.731901][ T7021] kasan_report+0x33/0x50 [ 61.736223][ T7021] check_memory_region+0x141/0x190 [ 61.741310][ T7021] x25_disconnect+0x253/0x370 [ 61.745964][ T7021] x25_release+0x345/0x420 [ 61.750353][ T7021] __sock_release+0xcd/0x280 [ 61.754930][ T7021] sock_close+0x18/0x20 [ 61.759057][ T7021] __fput+0x33e/0x880 [ 61.763037][ T7021] task_work_run+0xf4/0x1b0 [ 61.767553][ T7021] exit_to_usermode_loop+0x2fa/0x360 [ 61.772845][ T7021] do_syscall_64+0x6b1/0x7d0 [ 61.777418][ T7021] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.783294][ T7021] RIP: 0033:0x4afb40 [ 61.788880][ T7021] 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 [ 61.809093][ T7021] RSP: 002b:000000c0000794f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 61.817483][ T7021] RAX: 0000000000000000 RBX: 000000c00002c000 RCX: 00000000004afb40 [ 61.825431][ T7021] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 61.833377][ T7021] RBP: 000000c000079538 R08: 0000000000000000 R09: 0000000000000000 [ 61.843421][ T7021] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 61.851368][ T7021] R13: 0000000000000162 R14: 0000000000000161 R15: 0000000000000200 [ 61.860662][ T7021] Kernel Offset: disabled [ 61.865028][ T7021] Rebooting in 86400 seconds..