Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 10.680919] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 11.803441] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 29.980865] ------------[ cut here ]------------ [ 29.981616] kernel BUG at security/keys/keyring.c:1107! [ 29.982354] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 29.983123] Modules linked in: [ 29.983639] CPU: 0 PID: 2046 Comm: syz-executor174 Not tainted 4.9.141+ #72 [ 29.984576] task: ffff8801d2778000 task.stack: ffff8801cedb8000 [ 29.985378] RIP: 0010:[] [] __key_link_begin+0x20c/0x2d0 [ 29.986656] RSP: 0018:ffff8801cedbfbe0 EFLAGS: 00010293 [ 29.987399] RAX: ffff8801d2778000 RBX: ffff8801d532e300 RCX: 1ffff10039db7f71 [ 29.988395] RDX: 0000000000000000 RSI: ffffffff819ccf2c RDI: ffff8801cedbfd68 [ 29.989353] RBP: ffff8801cedbfc10 R08: ffffffff83c9ec20 R09: 0000000000000001 [ 29.990329] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8801cedbfd58 [ 29.991293] R13: ffffffff831c1800 R14: ffff8801cedbfd58 R15: ffff8801d532e300 [ 29.992252] FS: 0000000002146880(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 29.993437] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.994258] CR2: 0000000020caaffb CR3: 00000001cee6a000 CR4: 00000000001606b0 [ 29.995355] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.996331] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.997346] Stack: [ 29.997653] ffff8801cedbfcd8 ffff8801cedbfdf8 ffff8801d532e480 ffffffff831c1800 [ 29.998819] ffff8801cedbfd58 ffff8801d532e300 ffff8801cedbfe20 ffffffff819d6475 [ 30.000018] 0000000000000000 0000000000000000 ffff8801d27788a8 ffff8801cedbfcd8 [ 30.002692] Call Trace: [ 30.005274] [] request_key_and_link+0x535/0xac0 [ 30.011566] [] ? call_sbin_request_key+0x9d0/0x9d0 [ 30.018120] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.024950] [] ? trace_hardirqs_on+0xd/0x10 [ 30.030897] [] ? current_kernel_time64+0x104/0x120 [ 30.037451] [] ? lookup_user_key+0x221/0xd10 [ 30.043485] [] ? keyring_alloc+0xb0/0xb0 [ 30.049172] [] SyS_request_key+0x233/0x2f0 [ 30.055030] [] ? SyS_add_key+0x390/0x390 [ 30.060717] [] ? do_syscall_64+0x48/0x550 [ 30.066490] [] ? SyS_add_key+0x390/0x390 [ 30.072176] [] do_syscall_64+0x19f/0x550 [ 30.077881] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 30.084780] Code: 94 ff 48 c7 c7 e0 01 1c 83 e8 91 02 83 ff eb ac e8 4a eb 94 ff 48 c7 c7 e0 01 1c 83 e8 1e 4b e4 00 e9 f3 fe ff ff e8 34 eb 94 ff <0f> 0b e8 2d eb 94 ff 48 8d bb ce 00 00 00 48 b8 00 00 00 00 00 [ 30.111585] RIP [] __key_link_begin+0x20c/0x2d0 [ 30.118002] RSP [ 30.122033] ---[ end trace 75532f90a1e74a3e ]--- [ 30.126863] Kernel panic - not syncing: Fatal exception [ 30.132559] Kernel Offset: disabled [ 30.136169] Rebooting in 86400 seconds..