[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.935471] random: sshd: uninitialized urandom read (32 bytes read) [ 33.155917] kauditd_printk_skb: 9 callbacks suppressed [ 33.155925] audit: type=1400 audit(1573622271.014:35): avc: denied { map } for pid=6843 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 33.227646] random: sshd: uninitialized urandom read (32 bytes read) [ 33.811397] random: sshd: uninitialized urandom read (32 bytes read) [ 38.519678] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.167' (ECDSA) to the list of known hosts. [ 44.107918] 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 [ 44.230085] audit: type=1400 audit(1573622282.084:36): avc: denied { map } for pid=6856 comm="syz-executor957" path="/root/syz-executor957220321" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 44.586995] ------------[ cut here ]------------ [ 44.591919] kernel BUG at include/linux/scatterlist.h:124! [ 44.598057] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 44.603410] Modules linked in: [ 44.606585] CPU: 1 PID: 6977 Comm: syz-executor957 Not tainted 4.14.153 #0 [ 44.613572] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.623775] task: ffff88808c1da500 task.stack: ffff8880a84b0000 [ 44.629822] RIP: 0010:gcmaes_decrypt.constprop.0+0x910/0xd20 [ 44.635610] RSP: 0018:ffff8880a84b79b8 EFLAGS: 00010297 [ 44.641211] RAX: ffff88808c1da500 RBX: ffff8880a8280c88 RCX: 0000000087654321 [ 44.648459] RDX: 0000000000000000 RSI: 1ffff11015050122 RDI: ffff8880a8280924 [ 44.655720] RBP: ffff8880a84b7a90 R08: ffff8880a8281260 R09: ffffed1015096f5a [ 44.662977] R10: ffffed1015096f59 R11: ffff8880a84b7acb R12: ffffea000282da82 [ 44.670239] R13: ffff8880a8280cbc R14: 0000000000000010 R15: ffff888092cf2200 [ 44.677490] FS: 0000000001cc9880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 44.685694] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.691566] CR2: 0000000020c18000 CR3: 00000000982b5000 CR4: 00000000001406e0 [ 44.698816] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.706065] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.713318] Call Trace: [ 44.715899] ? aesni_gcm_enc_avx2+0x140/0x140 [ 44.720373] ? sock_kfree_s+0x36/0x50 [ 44.724156] generic_gcmaes_decrypt+0xf4/0x130 [ 44.728740] ? helper_rfc4106_decrypt+0x320/0x320 [ 44.733561] gcmaes_wrapper_decrypt+0x162/0x200 [ 44.738208] aead_recvmsg+0x821/0x1d70 [ 44.742087] ? aead_release+0x50/0x50 [ 44.745867] ? aead_check_key.isra.0+0x64/0x200 [ 44.750521] aead_recvmsg_nokey+0x5d/0x80 [ 44.754652] ? aead_sendpage_nokey+0xa0/0xa0 [ 44.759088] sock_recvmsg+0xc6/0x110 [ 44.762787] SYSC_recvfrom+0x1d2/0x300 [ 44.766656] ? kernel_recvmsg+0x140/0x140 [ 44.770786] ? _raw_spin_unlock_bh+0x31/0x40 [ 44.775174] ? release_sock+0x14a/0x1b0 [ 44.779143] ? alg_setsockopt+0xf6/0x350 [ 44.783369] ? SyS_recv+0x40/0x40 [ 44.786804] SyS_recvfrom+0x40/0x50 [ 44.790413] ? SyS_send+0x40/0x40 [ 44.793966] do_syscall_64+0x1e8/0x640 [ 44.797875] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.802703] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 44.807871] RIP: 0033:0x4412b9 [ 44.811054] RSP: 002b:00007fffe10d1018 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 44.818756] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 44.826004] RDX: 0000000100000205 RSI: 0000000020003240 RDI: 0000000000000004 [ 44.833253] RBP: 000000000000ae25 R08: 0000000000000000 R09: 0000000000000415 [ 44.840497] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004020e0 [ 44.847757] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 44.855010] Code: 0f 0b e8 74 16 2e 00 0f 0b e8 6d 16 2e 00 0f 0b e8 66 16 2e 00 0f 0b e8 5f 16 2e 00 e8 c6 64 d1 ff e9 63 ff ff ff e8 50 16 2e 00 <0f> 0b e8 49 16 2e 00 0f 0b 4c 89 85 58 ff ff ff e8 3b 16 2e 00 [ 44.874080] RIP: gcmaes_decrypt.constprop.0+0x910/0xd20 RSP: ffff8880a84b79b8 [ 44.881622] ---[ end trace 8edb5c33d2c70f38 ]--- [ 44.886375] Kernel panic - not syncing: Fatal exception [ 44.892967] Kernel Offset: disabled [ 44.896588] Rebooting in 86400 seconds..