Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. 2020/04/28 12:06:40 fuzzer started 2020/04/28 12:06:41 connecting to host at 10.128.0.26:42275 2020/04/28 12:06:41 checking machine... 2020/04/28 12:06:41 checking revisions... 2020/04/28 12:06:41 testing simple program... syzkaller login: [ 58.752457][ T7032] IPVS: ftp: loaded support on port[0] = 21 2020/04/28 12:06:42 building call list... [ 59.125297][ T7] tipc: TX() has been purged, node left! [ 60.391320][ T7016] can: request_module (can-proto-0) failed. executing program [ 62.228964][ T7016] can: request_module (can-proto-0) failed. [ 62.240548][ T7016] can: request_module (can-proto-0) failed. [ 62.674646][ T7016] ================================================================== [ 62.682841][ T7016] BUG: KASAN: null-ptr-deref in x25_disconnect+0x253/0x370 [ 62.690034][ T7016] Write of size 4 at addr 00000000000000d8 by task syz-fuzzer/7016 [ 62.697892][ T7016] [ 62.700213][ T7016] CPU: 1 PID: 7016 Comm: syz-fuzzer Not tainted 5.7.0-rc2-syzkaller #0 [ 62.708427][ T7016] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.718470][ T7016] Call Trace: [ 62.721737][ T7016] dump_stack+0x188/0x20d [ 62.726084][ T7016] ? x25_disconnect+0x253/0x370 [ 62.730923][ T7016] ? __sock_release+0x280/0x280 [ 62.735749][ T7016] __kasan_report.cold+0x5/0x4d [ 62.740576][ T7016] ? rcu_read_lock_held+0x1/0xb0 [ 62.745485][ T7016] ? x25_disconnect+0x253/0x370 [ 62.750312][ T7016] ? x25_disconnect+0x253/0x370 [ 62.755151][ T7016] kasan_report+0x33/0x50 [ 62.759470][ T7016] check_memory_region+0x141/0x190 [ 62.764573][ T7016] x25_disconnect+0x253/0x370 [ 62.769237][ T7016] x25_release+0x345/0x420 [ 62.773630][ T7016] __sock_release+0xcd/0x280 [ 62.778197][ T7016] sock_close+0x18/0x20 [ 62.782342][ T7016] __fput+0x33e/0x880 [ 62.786318][ T7016] task_work_run+0xf4/0x1b0 [ 62.790915][ T7016] exit_to_usermode_loop+0x2fa/0x360 [ 62.796173][ T7016] do_syscall_64+0x6b1/0x7d0 [ 62.800745][ T7016] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 62.806609][ T7016] RIP: 0033:0x4afb40 [ 62.810478][ T7016] 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 [ 62.830074][ T7016] RSP: 002b:000000c0001d54f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 62.838458][ T7016] RAX: 0000000000000000 RBX: 000000c00002e500 RCX: 00000000004afb40 [ 62.846408][ T7016] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 62.854357][ T7016] RBP: 000000c0001d5538 R08: 0000000000000000 R09: 0000000000000000 [ 62.862312][ T7016] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 62.870257][ T7016] R13: 0000000000000162 R14: 0000000000000161 R15: 0000000000000200 [ 62.878231][ T7016] ================================================================== [ 62.886268][ T7016] Disabling lock debugging due to kernel taint [ 62.892472][ T7016] Kernel panic - not syncing: panic_on_warn set ... [ 62.899056][ T7016] CPU: 1 PID: 7016 Comm: syz-fuzzer Tainted: G B 5.7.0-rc2-syzkaller #0 [ 62.911718][ T7016] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.922006][ T7016] Call Trace: [ 62.925284][ T7016] dump_stack+0x188/0x20d [ 62.929588][ T7016] ? __sock_release+0x280/0x280 [ 62.934412][ T7016] panic+0x2e3/0x75c [ 62.939156][ T7016] ? add_taint.cold+0x16/0x16 [ 62.943816][ T7016] ? x25_disconnect+0x253/0x370 [ 62.948640][ T7016] ? trace_hardirqs_on+0x55/0x220 [ 62.953634][ T7016] ? x25_disconnect+0x253/0x370 [ 62.958455][ T7016] ? __sock_release+0x280/0x280 [ 62.963277][ T7016] end_report+0x4d/0x53 [ 62.969501][ T7016] __kasan_report.cold+0xd/0x4d [ 62.974325][ T7016] ? rcu_read_lock_held+0x1/0xb0 [ 62.980020][ T7016] ? x25_disconnect+0x253/0x370 [ 62.984845][ T7016] ? x25_disconnect+0x253/0x370 [ 62.989672][ T7016] kasan_report+0x33/0x50 [ 62.993972][ T7016] check_memory_region+0x141/0x190 [ 62.999053][ T7016] x25_disconnect+0x253/0x370 [ 63.003712][ T7016] x25_release+0x345/0x420 [ 63.008115][ T7016] __sock_release+0xcd/0x280 [ 63.012679][ T7016] sock_close+0x18/0x20 [ 63.016868][ T7016] __fput+0x33e/0x880 [ 63.020831][ T7016] task_work_run+0xf4/0x1b0 [ 63.025335][ T7016] exit_to_usermode_loop+0x2fa/0x360 [ 63.030635][ T7016] do_syscall_64+0x6b1/0x7d0 [ 63.035201][ T7016] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 63.041114][ T7016] RIP: 0033:0x4afb40 [ 63.044983][ T7016] 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 [ 63.064563][ T7016] RSP: 002b:000000c0001d54f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 63.072955][ T7016] RAX: 0000000000000000 RBX: 000000c00002e500 RCX: 00000000004afb40 [ 63.080897][ T7016] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 63.088855][ T7016] RBP: 000000c0001d5538 R08: 0000000000000000 R09: 0000000000000000 [ 63.096803][ T7016] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 63.104750][ T7016] R13: 0000000000000162 R14: 0000000000000161 R15: 0000000000000200 [ 63.114218][ T7016] Kernel Offset: disabled [ 63.118532][ T7016] Rebooting in 86400 seconds..