[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.817201] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 14.723641] random: sshd: uninitialized urandom read (32 bytes read) [ 14.882138] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.580182] random: sshd: uninitialized urandom read (32 bytes read) [ 15.710166] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. [ 21.179209] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program [ 21.292048] kasan: CONFIG_KASAN_INLINE enabled [ 21.296663] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 21.304008] general protection fault: 0000 [#1] SMP KASAN [ 21.309530] CPU: 1 PID: 4358 Comm: syz-executor265 Not tainted 4.18.0-rc3+ #51 [ 21.316868] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.326210] RIP: 0010:perf_trace_lock_acquire+0xc8/0x9a0 [ 21.331680] Code: 20 f2 f2 f2 f2 c7 40 24 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8d 46 18 48 89 85 70 fe ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 8a 05 00 00 49 8b 79 18 48 85 ff 0f 84 72 04 00 [ 21.350820] RSP: 0018:ffff8801c9627508 EFLAGS: 00010002 [ 21.356174] RAX: 000000000000004c RBX: 1ffff100392c4eab RCX: 0000000000000000 [ 21.363437] RDX: dffffc0000000000 RSI: 0000000000000248 RDI: ffffffff88f7b740 [ 21.370687] RBP: ffff8801c96276e0 R08: 0000000000000000 R09: 0000000000000248 [ 21.377938] R10: ffffffff815dfe10 R11: dffffc0000000000 R12: ffff8801c96276b8 [ 21.385189] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff88f7b740 [ 21.392449] FS: 00007f36a9b08700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 21.400659] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.406522] CR2: 00007fffd15f2e5c CR3: 00000001b6310000 CR4: 00000000001406e0 [ 21.413791] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.421042] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.428291] Call Trace: [ 21.430866] ? trace_hardirqs_on+0x10/0x10 [ 21.435095] ? perf_trace_lock+0x920/0x920 [ 21.439313] ? is_bpf_text_address+0xd7/0x170 [ 21.443791] ? kernel_text_address+0x79/0xf0 [ 21.448181] ? __kernel_text_address+0xd/0x40 [ 21.452657] ? unwind_get_return_address+0x61/0xa0 [ 21.457572] ? __save_stack_trace+0x8d/0xf0 [ 21.461877] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 21.466704] ? perf_trace_lock+0x920/0x920 [ 21.470921] ? save_stack+0xa9/0xd0 [ 21.474528] ? save_stack+0x43/0xd0 [ 21.478138] lock_acquire+0x3a2/0x540 [ 21.481923] ? smap_list_hash_remove+0xa3/0x470 [ 21.486573] ? lock_release+0xa30/0xa30 [ 21.490531] ? perf_trace_lock+0x920/0x920 [ 21.494746] ? is_bpf_text_address+0xae/0x170 [ 21.499235] _raw_spin_lock_bh+0x31/0x40 [ 21.503279] ? smap_list_hash_remove+0xa3/0x470 [ 21.507933] smap_list_hash_remove+0xa3/0x470 [ 21.512414] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 21.517149] ? do_raw_spin_unlock+0xa7/0x2f0 [ 21.521537] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 21.526103] ? sock_hash_ctx_update_elem.isra.27+0xe5e/0x1690 [ 21.531966] ? trace_hardirqs_on+0xd/0x10 [ 21.536095] ? __local_bh_enable_ip+0x161/0x230 [ 21.540749] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 21.546531] ? sock_map_free+0x530/0x530 [ 21.550575] ? __fget+0x414/0x670 [ 21.554016] ? expand_files.part.8+0x9c0/0x9c0 [ 21.558583] ? lock_acquire+0x1e4/0x540 [ 21.562541] ? lock_acquire+0x1e4/0x540 [ 21.566501] sock_hash_update_elem+0x157/0x2f0 [ 21.571065] ? bpf_sock_hash_update+0x90/0x90 [ 21.575541] ? lock_release+0xa30/0xa30 [ 21.579502] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 21.585025] ? bpf_sock_hash_update+0x90/0x90 [ 21.589501] map_update_elem+0x5c4/0xc90 [ 21.593543] __x64_sys_bpf+0x32d/0x510 [ 21.597412] ? bpf_prog_get+0x20/0x20 [ 21.601197] do_syscall_64+0x1b9/0x820 [ 21.605066] ? finish_task_switch+0x1d3/0x890 [ 21.609542] ? syscall_return_slowpath+0x5e0/0x5e0 [ 21.614456] ? syscall_return_slowpath+0x31d/0x5e0 [ 21.619365] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 21.624362] ? prepare_exit_to_usermode+0x291/0x3b0 [ 21.629360] ? perf_trace_sys_enter+0xb10/0xb10 [ 21.634014] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 21.638840] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 21.644014] RIP: 0033:0x4459b9 [ 21.647206] Code: e8 3c b6 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 21.666337] RSP: 002b:00007f36a9b07db8 EFLAGS: 00000293 ORIG_RAX: 0000000000000141 [ 21.674030] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004459b9 [ 21.681280] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 21.688532] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 21.695780] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 21.703037] R13: 00007fff43fd2e6f R14: 00007f36a9b089c0 R15: 000000000000000a [ 21.710295] Modules linked in: [ 21.713474] Dumping ftrace buffer: [ 21.716993] (ftrace buffer empty) [ 21.720693] ---[ end trace d9738a51e10555d0 ]--- [ 21.725439] RIP: 0010:perf_trace_lock_acquire+0xc8/0x9a0 [ 21.730864] Code: 20 f2 f2 f2 f2 c7 40 24 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8d 46 18 48 89 85 70 fe ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 8a 05 00 00 49 8b 79 18 48 85 ff 0f 84 72 04 00 [ 21.749993] RSP: 0018:ffff8801c9627508 EFLAGS: 00010002 [ 21.755340] RAX: 000000000000004c RBX: 1ffff100392c4eab RCX: 0000000000000000 [ 21.762590] RDX: dffffc0000000000 RSI: 0000000000000248 RDI: ffffffff88f7b740 [ 21.769843] RBP: ffff8801c96276e0 R08: 0000000000000000 R09: 0000000000000248 [ 21.777097] R10: ffffffff815dfe10 R11: dffffc0000000000 R12: ffff8801c96276b8 [ 21.784347] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff88f7b740 [ 21.791602] FS: 00007f36a9b08700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 21.799831] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.805693] CR2: 00007fffd15f2e5c CR3: 00000001b6310000 CR4: 00000000001406e0 [ 21.812958] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.820212] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.827461] Kernel panic - not syncing: Fatal exception in interrupt [ 21.834402] Dumping ftrace buffer: [ 21.837921] (ftrace buffer empty) [ 21.841607] Kernel Offset: disabled [ 21.845210] Rebooting in 86400 seconds..