Warning: Permanently added '10.128.10.28' (ECDSA) to the list of known hosts. 2020/04/27 21:24:44 fuzzer started syzkaller login: [ 59.237788][ T7045] as (7045) used greatest stack depth: 23272 bytes left 2020/04/27 21:24:46 connecting to host at 10.128.0.26:39253 2020/04/27 21:24:46 checking machine... 2020/04/27 21:24:46 checking revisions... 2020/04/27 21:24:46 testing simple program... [ 60.259188][ T7055] IPVS: ftp: loaded support on port[0] = 21 2020/04/27 21:24:46 building call list... [ 60.648146][ T6893] tipc: TX() has been purged, node left! [ 61.970284][ T7035] can: request_module (can-proto-0) failed. executing program [ 63.811752][ T7035] can: request_module (can-proto-0) failed. [ 63.823076][ T7035] can: request_module (can-proto-0) failed. [ 64.287812][ T7035] ================================================================== [ 64.296120][ T7035] BUG: KASAN: null-ptr-deref in x25_disconnect+0x253/0x370 [ 64.303330][ T7035] Write of size 4 at addr 00000000000000d8 by task syz-fuzzer/7035 [ 64.311303][ T7035] [ 64.313615][ T7035] CPU: 0 PID: 7035 Comm: syz-fuzzer Not tainted 5.7.0-rc2-syzkaller #0 [ 64.321851][ T7035] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.331993][ T7035] Call Trace: [ 64.335293][ T7035] dump_stack+0x188/0x20d [ 64.339602][ T7035] ? x25_disconnect+0x253/0x370 [ 64.344435][ T7035] ? __sock_release+0x280/0x280 [ 64.349265][ T7035] __kasan_report.cold+0x5/0x4d [ 64.354096][ T7035] ? rcu_read_lock_held+0x1/0xb0 [ 64.359008][ T7035] ? x25_disconnect+0x253/0x370 [ 64.364197][ T7035] ? x25_disconnect+0x253/0x370 [ 64.369041][ T7035] kasan_report+0x33/0x50 [ 64.373361][ T7035] check_memory_region+0x141/0x190 [ 64.378652][ T7035] x25_disconnect+0x253/0x370 [ 64.383315][ T7035] x25_release+0x345/0x420 [ 64.387723][ T7035] __sock_release+0xcd/0x280 [ 64.392320][ T7035] sock_close+0x18/0x20 [ 64.396457][ T7035] __fput+0x33e/0x880 [ 64.400426][ T7035] task_work_run+0xf4/0x1b0 [ 64.404923][ T7035] exit_to_usermode_loop+0x2fa/0x360 [ 64.410289][ T7035] do_syscall_64+0x6b1/0x7d0 [ 64.414859][ T7035] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 64.420723][ T7035] RIP: 0033:0x4afb40 [ 64.424603][ T7035] 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 [ 64.444458][ T7035] RSP: 002b:000000c0001a14f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 64.452852][ T7035] RAX: 0000000000000000 RBX: 000000c00002c000 RCX: 00000000004afb40 [ 64.460810][ T7035] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 64.468767][ T7035] RBP: 000000c0001a1538 R08: 0000000000000000 R09: 0000000000000000 [ 64.476722][ T7035] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 64.484677][ T7035] R13: 0000000000000163 R14: 0000000000000162 R15: 0000000000000200 [ 64.492642][ T7035] ================================================================== [ 64.501628][ T7035] Disabling lock debugging due to kernel taint [ 64.507806][ T7035] Kernel panic - not syncing: panic_on_warn set ... [ 64.514388][ T7035] CPU: 0 PID: 7035 Comm: syz-fuzzer Tainted: G B 5.7.0-rc2-syzkaller #0 [ 64.524109][ T7035] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.534164][ T7035] Call Trace: [ 64.537487][ T7035] dump_stack+0x188/0x20d [ 64.541808][ T7035] ? __sock_release+0x280/0x280 [ 64.546685][ T7035] panic+0x2e3/0x75c [ 64.550562][ T7035] ? add_taint.cold+0x16/0x16 [ 64.555282][ T7035] ? x25_disconnect+0x253/0x370 [ 64.560186][ T7035] ? trace_hardirqs_on+0x55/0x220 [ 64.565202][ T7035] ? x25_disconnect+0x253/0x370 [ 64.570035][ T7035] ? __sock_release+0x280/0x280 [ 64.574895][ T7035] end_report+0x4d/0x53 [ 64.579077][ T7035] __kasan_report.cold+0xd/0x4d [ 64.584138][ T7035] ? rcu_read_lock_held+0x1/0xb0 [ 64.589065][ T7035] ? x25_disconnect+0x253/0x370 [ 64.593897][ T7035] ? x25_disconnect+0x253/0x370 [ 64.598721][ T7035] kasan_report+0x33/0x50 [ 64.603034][ T7035] check_memory_region+0x141/0x190 [ 64.608121][ T7035] x25_disconnect+0x253/0x370 [ 64.612780][ T7035] x25_release+0x345/0x420 [ 64.617168][ T7035] __sock_release+0xcd/0x280 [ 64.621741][ T7035] sock_close+0x18/0x20 [ 64.625868][ T7035] __fput+0x33e/0x880 [ 64.629826][ T7035] task_work_run+0xf4/0x1b0 [ 64.634305][ T7035] exit_to_usermode_loop+0x2fa/0x360 [ 64.639562][ T7035] do_syscall_64+0x6b1/0x7d0 [ 64.644134][ T7035] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 64.650098][ T7035] RIP: 0033:0x4afb40 [ 64.653987][ T7035] 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 [ 64.673582][ T7035] RSP: 002b:000000c0001a14f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000003 [ 64.681968][ T7035] RAX: 0000000000000000 RBX: 000000c00002c000 RCX: 00000000004afb40 [ 64.689921][ T7035] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 64.698138][ T7035] RBP: 000000c0001a1538 R08: 0000000000000000 R09: 0000000000000000 [ 64.706262][ T7035] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff [ 64.714232][ T7035] R13: 0000000000000163 R14: 0000000000000162 R15: 0000000000000200 [ 64.723511][ T7035] Kernel Offset: disabled [ 64.727852][ T7035] Rebooting in 86400 seconds..