[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.312707] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.316701] random: sshd: uninitialized urandom read (32 bytes read) [ 28.808618] random: sshd: uninitialized urandom read (32 bytes read) [ 29.565777] random: sshd: uninitialized urandom read (32 bytes read) [ 29.725966] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.7' (ECDSA) to the list of known hosts. [ 35.182108] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 35.279260] IPVS: ftp: loaded support on port[0] = 21 [ 35.316935] WARNING: CPU: 0 PID: 4494 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 35.325333] Kernel panic - not syncing: panic_on_warn set ... [ 35.325333] [ 35.332682] CPU: 0 PID: 4494 Comm: syz-executor282 Not tainted 4.17.0-rc3+ #38 [ 35.340058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.349395] Call Trace: [ 35.351968] dump_stack+0x1b9/0x294 [ 35.355579] ? dump_stack_print_info.cold.2+0x52/0x52 [ 35.360754] ? smc_unhash_sk+0x290/0x4a0 [ 35.364795] panic+0x22f/0x4de [ 35.367967] ? add_taint.cold.5+0x16/0x16 [ 35.372101] ? __warn.cold.8+0x148/0x1b3 [ 35.376140] ? __warn.cold.8+0x117/0x1b3 [ 35.380183] ? smc_unhash_sk+0x345/0x4a0 [ 35.384255] __warn.cold.8+0x163/0x1b3 [ 35.388126] ? smc_unhash_sk+0x345/0x4a0 [ 35.392172] report_bug+0x252/0x2d0 [ 35.395784] do_error_trap+0x1de/0x490 [ 35.399654] ? graph_lock+0x170/0x170 [ 35.403436] ? math_error+0x420/0x420 [ 35.407222] ? lock_acquire+0x1dc/0x520 [ 35.411195] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.416026] do_invalid_op+0x1b/0x20 [ 35.419723] invalid_op+0x14/0x20 [ 35.423157] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 35.427800] RSP: 0018:ffff8801adb87488 EFLAGS: 00010293 [ 35.433140] RAX: ffff8801d972a240 RBX: ffff8801ade277c0 RCX: ffffffff873f7cfe [ 35.440386] RDX: 0000000000000000 RSI: ffffffff873f7db5 RDI: 0000000000000005 [ 35.447637] RBP: ffff8801adb87570 R08: ffff8801d972a240 R09: ffffed0035bc4f08 [ 35.454902] R10: ffffed0035bc4f08 R11: ffff8801ade27843 R12: 1ffff10035b70e95 [ 35.462153] R13: ffff8801adb87548 R14: ffffffff8970b1e0 R15: ffff8801ade27840 [ 35.469419] ? smc_unhash_sk+0x28e/0x4a0 [ 35.473466] ? smc_unhash_sk+0x345/0x4a0 [ 35.477510] ? smc_unhash_sk+0x345/0x4a0 [ 35.481557] ? smc_rx_data_available+0x100/0x100 [ 35.486293] ? release_sock+0x1e2/0x2b0 [ 35.490252] ? __local_bh_enable_ip+0x161/0x230 [ 35.494913] ? __release_sock+0x3a0/0x3a0 [ 35.499055] ? smc_release+0x269/0x610 [ 35.502931] ? trace_hardirqs_on+0xd/0x10 [ 35.507060] ? __local_bh_enable_ip+0x161/0x230 [ 35.511710] smc_release+0x36e/0x610 [ 35.515406] sock_release+0x96/0x1b0 [ 35.519101] ? sock_alloc_file+0x4e0/0x4e0 [ 35.523316] sock_close+0x16/0x20 [ 35.526750] __fput+0x34d/0x890 [ 35.530015] ? fput+0x1a0/0x1a0 [ 35.533291] ? check_same_owner+0x320/0x320 [ 35.537593] ____fput+0x15/0x20 [ 35.540852] task_work_run+0x1e4/0x290 [ 35.544727] ? task_work_cancel+0x240/0x240 [ 35.549040] ? switch_task_namespaces+0xbd/0xd0 [ 35.553698] do_exit+0x1aee/0x2730 [ 35.557222] ? mm_update_next_owner+0x980/0x980 [ 35.561875] ? find_held_lock+0x36/0x1c0 [ 35.565921] ? lock_downgrade+0x8e0/0x8e0 [ 35.570051] ? lock_downgrade+0x8e0/0x8e0 [ 35.574184] ? kasan_check_read+0x11/0x20 [ 35.578316] ? do_raw_spin_unlock+0x9e/0x2e0 [ 35.582705] ? __local_bh_enable_ip+0x161/0x230 [ 35.587355] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.592361] ? release_sock+0x1e2/0x2b0 [ 35.596320] ? trace_hardirqs_on+0xd/0x10 [ 35.600449] ? __local_bh_enable_ip+0x161/0x230 [ 35.605111] ? _raw_spin_unlock_bh+0x30/0x40 [ 35.609499] ? release_sock+0x1e2/0x2b0 [ 35.613454] ? __release_sock+0x3a0/0x3a0 [ 35.617585] ? __local_bh_enable_ip+0x161/0x230 [ 35.622232] ? lock_sock_nested+0xe7/0x120 [ 35.626445] ? smc_sendmsg+0x2d5/0x370 [ 35.630307] ? smc_sendpage+0x1a0/0x1a0 [ 35.634265] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.639781] ? sock_sendmsg+0x5a/0x120 [ 35.643650] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.649174] ? __sys_sendto+0x475/0x670 [ 35.653130] ? __ia32_sys_getpeername+0xb0/0xb0 [ 35.657781] ? lock_downgrade+0x8e0/0x8e0 [ 35.661919] ? handle_mm_fault+0x8c0/0xc70 [ 35.666137] ? handle_mm_fault+0x55a/0xc70 [ 35.670361] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.675883] do_group_exit+0x16f/0x430 [ 35.679753] ? mm_fault_error+0x380/0x380 [ 35.683884] ? __ia32_sys_exit+0x50/0x50 [ 35.687941] ? do_syscall_64+0x92/0x800 [ 35.691898] __x64_sys_exit_group+0x3e/0x50 [ 35.696204] do_syscall_64+0x1b1/0x800 [ 35.700077] ? syscall_return_slowpath+0x5c0/0x5c0 [ 35.704989] ? syscall_return_slowpath+0x30f/0x5c0 [ 35.709906] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 35.715254] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.720083] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.725251] RIP: 0033:0x440749 [ 35.728420] RSP: 002b:00007ffe775c4b78 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 35.736106] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440749 [ 35.743353] RDX: 0000000000440749 RSI: 0000000000000000 RDI: 0000000000000001 [ 35.750603] RBP: 00000000006cb018 R08: 0000000000000010 R09: 0000000000401c60 [ 35.757851] R10: 0000000020000440 R11: 0000000000000202 R12: 0000000000401bd0 [ 35.765100] R13: 0000000000401c60 R14: 0000000000000000 R15: 0000000000000000 [ 35.772965] Dumping ftrace buffer: [ 35.776583] (ftrace buffer empty) [ 35.780273] Kernel Offset: disabled [ 35.783894] Rebooting in 86400 seconds..