[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.704438] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.570787] random: sshd: uninitialized urandom read (32 bytes read) [ 20.009978] random: sshd: uninitialized urandom read (32 bytes read) [ 20.757605] random: sshd: uninitialized urandom read (32 bytes read) [ 20.908760] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.45' (ECDSA) to the list of known hosts. [ 26.342820] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 26.649291] kasan: CONFIG_KASAN_INLINE enabled [ 26.653909] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.661252] general protection fault: 0000 [#1] SMP KASAN [ 26.666772] CPU: 1 PID: 4453 Comm: syz-executor589 Not tainted 4.18.0-rc3+ #45 [ 26.674122] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.683474] RIP: 0010:perf_trace_lock_acquire+0xc8/0x9a0 [ 26.688912] 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 [ 26.708072] RSP: 0018:ffff8801ac8e7508 EFLAGS: 00010002 [ 26.713443] RAX: 000000000000004c RBX: 1ffff1003591ceab RCX: 0000000000000000 [ 26.720713] RDX: dffffc0000000000 RSI: 0000000000000248 RDI: ffffffff88f7b740 [ 26.727968] RBP: ffff8801ac8e76e0 R08: 0000000000000000 R09: 0000000000000248 [ 26.735305] R10: ffffffff815dfe10 R11: dffffc0000000000 R12: ffff8801ac8e76b8 [ 26.742556] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff88f7b740 [ 26.749822] FS: 00007f4893660700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 26.758032] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.763897] CR2: 00007ffeee1c1f60 CR3: 00000001c4982000 CR4: 00000000001406e0 [ 26.771149] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.778410] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.785659] Call Trace: [ 26.788341] ? trace_hardirqs_on+0x10/0x10 [ 26.792571] ? perf_trace_lock+0x920/0x920 [ 26.796788] ? is_bpf_text_address+0xd7/0x170 [ 26.801267] ? kernel_text_address+0x79/0xf0 [ 26.805660] ? __kernel_text_address+0xd/0x40 [ 26.810150] ? unwind_get_return_address+0x61/0xa0 [ 26.815506] ? __save_stack_trace+0x8d/0xf0 [ 26.819823] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 26.824661] ? perf_trace_lock+0x920/0x920 [ 26.828886] ? save_stack+0xa9/0xd0 [ 26.832519] ? save_stack+0x43/0xd0 [ 26.836127] lock_acquire+0x3a2/0x540 [ 26.839911] ? smap_list_hash_remove+0xa3/0x470 [ 26.844560] ? lock_release+0xa30/0xa30 [ 26.848518] ? perf_trace_lock+0x920/0x920 [ 26.852732] ? is_bpf_text_address+0xae/0x170 [ 26.857230] _raw_spin_lock_bh+0x31/0x40 [ 26.861285] ? smap_list_hash_remove+0xa3/0x470 [ 26.865935] smap_list_hash_remove+0xa3/0x470 [ 26.870413] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 26.875162] ? do_raw_spin_unlock+0xa7/0x2f0 [ 26.879551] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 26.884115] ? sock_hash_ctx_update_elem.isra.27+0xe5e/0x1690 [ 26.890008] ? trace_hardirqs_on+0xd/0x10 [ 26.894143] ? __local_bh_enable_ip+0x161/0x230 [ 26.898797] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 26.904604] ? sock_map_free+0x530/0x530 [ 26.908658] ? __fget+0x414/0x670 [ 26.912092] ? expand_files.part.8+0x9c0/0x9c0 [ 26.916656] ? lock_acquire+0x1e4/0x540 [ 26.920615] ? lock_acquire+0x1e4/0x540 [ 26.924574] sock_hash_update_elem+0x157/0x2f0 [ 26.929138] ? bpf_sock_hash_update+0x90/0x90 [ 26.933618] ? lock_release+0xa30/0xa30 [ 26.937581] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 26.943102] ? bpf_sock_hash_update+0x90/0x90 [ 26.947580] map_update_elem+0x5c4/0xc90 [ 26.951627] __x64_sys_bpf+0x32d/0x510 [ 26.955507] ? bpf_prog_get+0x20/0x20 [ 26.959293] ? kasan_check_read+0x11/0x20 [ 26.963426] do_syscall_64+0x1b9/0x820 [ 26.967311] ? syscall_return_slowpath+0x5e0/0x5e0 [ 26.972224] ? syscall_return_slowpath+0x31d/0x5e0 [ 26.977145] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 26.982146] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.986970] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 26.992142] RIP: 0033:0x446fd9 [ 26.995308] Code: e8 2c b7 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 [ 27.014433] RSP: 002b:00007f489365fce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 27.022127] RAX: ffffffffffffffda RBX: 00000000006dbc3c RCX: 0000000000446fd9 [ 27.030159] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 27.037408] RBP: 00000000006dbc38 R08: 0000000000000000 R09: 0000000000000000 [ 27.044659] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.051908] R13: 00007fff05eda99f R14: 00007f48936609c0 R15: 0000000000000009 [ 27.059158] Modules linked in: [ 27.062335] Dumping ftrace buffer: [ 27.065856] (ftrace buffer empty) [ 27.069557] ---[ end trace 9f7ef7287deb3dc4 ]--- [ 27.074297] RIP: 0010:perf_trace_lock_acquire+0xc8/0x9a0 [ 27.079731] 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 [ 27.098945] RSP: 0018:ffff8801ac8e7508 EFLAGS: 00010002 [ 27.104290] RAX: 000000000000004c RBX: 1ffff1003591ceab RCX: 0000000000000000 [ 27.111539] RDX: dffffc0000000000 RSI: 0000000000000248 RDI: ffffffff88f7b740 [ 27.118788] RBP: ffff8801ac8e76e0 R08: 0000000000000000 R09: 0000000000000248 [ 27.126045] R10: ffffffff815dfe10 R11: dffffc0000000000 R12: ffff8801ac8e76b8 [ 27.133473] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff88f7b740 [ 27.140737] FS: 00007f4893660700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 27.148947] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.154822] CR2: 00007ffeee1c1f60 CR3: 00000001c4982000 CR4: 00000000001406e0 [ 27.162076] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.169331] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.176595] Kernel panic - not syncing: Fatal exception in interrupt [ 27.183550] Dumping ftrace buffer: [ 27.187079] (ftrace buffer empty) [ 27.190764] Kernel Offset: disabled [ 27.194378] Rebooting in 86400 seconds..