[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 27.751481] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.060933] random: sshd: uninitialized urandom read (32 bytes read) [ 29.435547] random: sshd: uninitialized urandom read (32 bytes read) [ 30.547583] random: sshd: uninitialized urandom read (32 bytes read) [ 31.372948] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.38' (ECDSA) to the list of known hosts. [ 36.966249] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 40.504179] list_add corruption. prev->next should be next (ffffffff8af0e970), but was 0000000000000000. (prev=ffff8801c7a721d8). [ 40.516395] ------------[ cut here ]------------ [ 40.521171] kernel BUG at lib/list_debug.c:28! [ 40.525940] invalid opcode: 0000 [#1] SMP PTI [ 40.530457] Dumping ftrace buffer: [ 40.533998] (ftrace buffer empty) [ 40.537714] Modules linked in: [ 40.540923] CPU: 1 PID: 6153 Comm: syz-executor751 Not tainted 4.17.0+ #9 [ 40.547861] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.557244] RIP: 0010:__list_add_valid+0x43c/0x450 [ 40.562173] RSP: 0018:ffff8801bccdfa60 EFLAGS: 00010282 [ 40.567558] RAX: 0000000000000075 RBX: 0000000000000000 RCX: 0000000000000000 [ 40.574836] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 40.582109] RBP: ffff8801bccdfac8 R08: 0000000001080020 R09: 0000000000000002 [ 40.589398] R10: 0000000000000000 R11: ffffffff86575950 R12: ffffffff8af0e970 [ 40.596683] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b13d88d8 [ 40.603980] FS: 00000000024d7880(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 40.612220] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.618114] CR2: 00000000006cb090 CR3: 000000019ccee000 CR4: 00000000001406e0 [ 40.625407] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.632781] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.640074] Call Trace: [ 40.642741] rdma_listen+0x65f/0x10f0 [ 40.646581] ucma_listen+0x4e9/0x630 [ 40.650310] ? ucma_connect+0x980/0x980 [ 40.654296] ucma_write+0x57e/0x5f0 [ 40.657952] ? show_ibdev+0xf0/0xf0 [ 40.661596] __vfs_write+0x1aa/0x9f0 [ 40.665367] vfs_write+0x467/0x8c0 [ 40.668943] __x64_sys_write+0x1bf/0x3e0 [ 40.673015] ? ksys_write+0x360/0x360 [ 40.676845] do_syscall_64+0x15b/0x230 [ 40.680743] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 40.685941] RIP: 0033:0x440969 [ 40.689128] RSP: 002b:00007ffe68bd7738 EFLAGS: 00000207 ORIG_RAX: 0000000000000001 [ 40.696860] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440969 [ 40.704157] RDX: 0000000000000010 RSI: 0000000020000000 RDI: 0000000000000003 [ 40.711427] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 40.718696] R10: 00000000004002c8 R11: 0000000000000207 R12: 0000000000009e2d [ 40.725980] R13: 0000000000401e60 R14: 0000000000000000 R15: 0000000000000000 [ 40.733270] Code: 80 0c 00 00 00 00 00 00 41 c7 87 20 03 00 00 00 00 00 00 48 c7 c7 47 b1 9c 8a 31 c0 4c 89 e6 4c 89 ea 48 8b 4d c0 e8 54 a3 3e fd <0f> 0b 66 90 eb fe 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 [ 40.753082] RIP: __list_add_valid+0x43c/0x450 RSP: ffff8801bccdfa60 [ 40.760427] ---[ end trace 78493249e1315d39 ]--- [ 40.765293] Kernel panic - not syncing: Fatal exception [ 40.771353] Dumping ftrace buffer: [ 40.774906] (ftrace buffer empty) [ 40.778611] Kernel Offset: disabled [ 40.782268] Rebooting in 86400 seconds..