Warning: Permanently added '10.128.0.139' (ECDSA) to the list of known hosts. 2020/05/02 23:13:59 fuzzer started 2020/05/02 23:13:59 connecting to host at 10.128.0.26:40577 2020/05/02 23:13:59 checking machine... 2020/05/02 23:13:59 checking revisions... 2020/05/02 23:13:59 testing simple program... syzkaller login: [ 56.952289][ T7036] IPVS: ftp: loaded support on port[0] = 21 2020/05/02 23:14:00 building call list... [ 57.391304][ T197] tipc: TX() has been purged, node left! [ 58.598375][ T7021] can: request_module (can-proto-0) failed. executing program [ 60.725672][ T7021] can: request_module (can-proto-0) failed. [ 60.737692][ T7021] can: request_module (can-proto-0) failed. [ 61.189972][ T7021] ================================================================== [ 61.198190][ T7021] BUG: KASAN: null-ptr-deref in x25_disconnect+0x253/0x370 [ 61.205370][ T7021] Write of size 4 at addr 00000000000000d8 by task syz-fuzzer/7021 [ 61.213761][ T7021] [ 61.216077][ T7021] CPU: 1 PID: 7021 Comm: syz-fuzzer Not tainted 5.7.0-rc2-syzkaller #0 [ 61.224443][ T7021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.234526][ T7021] Call Trace: [ 61.237810][ T7021] dump_stack+0x188/0x20d [ 61.242143][ T7021] ? x25_disconnect+0x253/0x370 [ 61.247074][ T7021] ? __sock_release+0x280/0x280 [ 61.252050][ T7021] __kasan_report.cold+0x5/0x4d [ 61.256892][ T7021] ? rcu_read_lock_held+0x1/0xb0 [ 61.261818][ T7021] ? x25_disconnect+0x253/0x370 [ 61.266651][ T7021] ? x25_disconnect+0x253/0x370 [ 61.271480][ T7021] kasan_report+0x33/0x50 [ 61.276312][ T7021] check_memory_region+0x141/0x190 [ 61.281835][ T7021] x25_disconnect+0x253/0x370 [ 61.286489][ T7021] x25_release+0x345/0x420 [ 61.290888][ T7021] __sock_release+0xcd/0x280 [ 61.295488][ T7021] sock_close+0x18/0x20 [ 61.299635][ T7021] __fput+0x33e/0x880 [ 61.303611][ T7021] task_work_run+0xf4/0x1b0 [ 61.308100][ T7021] exit_to_usermode_loop+0x2fa/0x360 [ 61.313386][ T7021] do_syscall_64+0x6b1/0x7d0 [ 61.317973][ T7021] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.323844][ T7021] RIP: 0033:0x4afb40 [ 61.327717][ 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 [ 61.347322][ T7021] RSP: 002b:000000c0001eb4f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 61.355744][ T7021] RAX: 0000000000000000 RBX: 000000c00002c000 RCX: 00000000004afb40 [ 61.363707][ T7021] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 61.371679][ T7021] RBP: 000000c0001eb538 R08: 0000000000000000 R09: 0000000000000000 [ 61.379630][ T7021] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 61.387585][ T7021] R13: 0000000000000162 R14: 0000000000000161 R15: 0000000000000200 [ 61.395732][ T7021] ================================================================== [ 61.403972][ T7021] Disabling lock debugging due to kernel taint [ 61.410199][ T7021] Kernel panic - not syncing: panic_on_warn set ... [ 61.416790][ T7021] CPU: 1 PID: 7021 Comm: syz-fuzzer Tainted: G B 5.7.0-rc2-syzkaller #0 [ 61.426433][ T7021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.436553][ T7021] Call Trace: [ 61.439823][ T7021] dump_stack+0x188/0x20d [ 61.444258][ T7021] ? __sock_release+0x280/0x280 [ 61.449101][ T7021] panic+0x2e3/0x75c [ 61.452997][ T7021] ? add_taint.cold+0x16/0x16 [ 61.457658][ T7021] ? x25_disconnect+0x253/0x370 [ 61.462490][ T7021] ? trace_hardirqs_on+0x55/0x220 [ 61.467678][ T7021] ? x25_disconnect+0x253/0x370 [ 61.472504][ T7021] ? __sock_release+0x280/0x280 [ 61.477401][ T7021] end_report+0x4d/0x53 [ 61.481894][ T7021] __kasan_report.cold+0xd/0x4d [ 61.486760][ T7021] ? rcu_read_lock_held+0x1/0xb0 [ 61.491682][ T7021] ? x25_disconnect+0x253/0x370 [ 61.496513][ T7021] ? x25_disconnect+0x253/0x370 [ 61.501337][ T7021] kasan_report+0x33/0x50 [ 61.505666][ T7021] check_memory_region+0x141/0x190 [ 61.510768][ T7021] x25_disconnect+0x253/0x370 [ 61.515419][ T7021] x25_release+0x345/0x420 [ 61.519812][ T7021] __sock_release+0xcd/0x280 [ 61.524375][ T7021] sock_close+0x18/0x20 [ 61.528505][ T7021] __fput+0x33e/0x880 [ 61.532461][ T7021] task_work_run+0xf4/0x1b0 [ 61.536940][ T7021] exit_to_usermode_loop+0x2fa/0x360 [ 61.542201][ T7021] do_syscall_64+0x6b1/0x7d0 [ 61.546765][ T7021] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.552646][ T7021] RIP: 0033:0x4afb40 [ 61.556514][ 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 [ 61.576748][ T7021] RSP: 002b:000000c0001eb4f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 61.585141][ T7021] RAX: 0000000000000000 RBX: 000000c00002c000 RCX: 00000000004afb40 [ 61.593103][ T7021] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 61.601055][ T7021] RBP: 000000c0001eb538 R08: 0000000000000000 R09: 0000000000000000 [ 61.609010][ T7021] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 61.616965][ T7021] R13: 0000000000000162 R14: 0000000000000161 R15: 0000000000000200 [ 61.626353][ T7021] Kernel Offset: disabled [ 61.630688][ T7021] Rebooting in 86400 seconds..