[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.33' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.354320] audit: type=1400 audit(1590144810.681:8): avc: denied { execmem } for pid=6448 comm="syz-executor032" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 42.375295] kasan: CONFIG_KASAN_INLINE enabled [ 42.380021] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.387928] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.394168] CPU: 0 PID: 6448 Comm: syz-executor032 Not tainted 4.19.124-syzkaller #0 [ 42.402450] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.411801] RIP: 0010:fq_codel_enqueue+0xa63/0x1190 [ 42.416798] Code: 00 00 00 e8 5f 17 a9 fb 48 8b 44 24 38 80 38 00 0f 85 c4 05 00 00 48 be 00 00 00 00 00 fc ff df 49 8b 07 48 89 c2 48 c1 ea 03 <80> 3c 32 00 0f 85 52 05 00 00 48 8b 10 48 8d 78 28 48 b9 00 00 00 [ 42.435684] RSP: 0018:ffff888089a2f6d0 EFLAGS: 00010246 [ 42.441030] RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 [ 42.448295] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000000 [ 42.455551] RBP: ffff888089a2f7d0 R08: ffff888091cb02c0 R09: ffffffff8aafb008 [ 42.462991] R10: ffffffff8aafb017 R11: ffffffff8aafb010 R12: ffff888089a2f8a0 [ 42.470372] R13: 0000000000000000 R14: 0000000000000400 R15: ffff8880864a0180 [ 42.477749] FS: 000000000122c880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 42.485956] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.491834] CR2: 00007fe9c578f020 CR3: 000000009e1eb000 CR4: 00000000001406f0 [ 42.499107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.506478] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.513778] Call Trace: [ 42.516387] ? drop_func+0x60/0x60 [ 42.520019] ? __dev_queue_xmit+0x165e/0x3010 [ 42.524504] __dev_queue_xmit+0x171f/0x3010 [ 42.528832] ? netdev_pick_tx+0x2f0/0x2f0 [ 42.533050] ? _copy_from_iter+0x31d/0xb40 [ 42.537284] ? __phys_addr+0x9a/0x110 [ 42.541089] ? __check_object_size+0x17b/0x421 [ 42.545681] ? skb_copy_datagram_from_iter+0x458/0x680 [ 42.550979] ? _copy_from_iter_full+0x234/0x7b0 [ 42.555835] ? packet_sendmsg+0x2389/0x6070 [ 42.560184] packet_sendmsg+0x2389/0x6070 [ 42.564492] ? sock_has_perm+0x1e5/0x280 [ 42.568549] ? selinux_secmark_relabel_packet+0xd0/0xd0 [ 42.573908] ? lock_downgrade+0x740/0x740 [ 42.578037] ? lock_acquire+0x170/0x3c0 [ 42.582010] ? packet_lookup_frame+0x260/0x260 [ 42.586598] ? avc_has_perm+0x227/0x410 [ 42.590553] ? packet_lookup_frame+0x260/0x260 [ 42.595148] sock_sendmsg+0xc3/0x120 [ 42.598848] sock_write_iter+0x283/0x3c0 [ 42.603060] ? sock_sendmsg+0x120/0x120 [ 42.607077] ? inode_has_perm.isra.0+0x175/0x210 [ 42.612520] __vfs_write+0x512/0x760 [ 42.616234] ? kernel_read+0x110/0x110 [ 42.620108] ? selinux_file_permission+0x87/0x520 [ 42.624933] ? security_file_permission+0x84/0x220 [ 42.629870] vfs_write+0x1f3/0x540 [ 42.633438] ksys_write+0x12b/0x2a0 [ 42.637189] ? __ia32_sys_read+0xb0/0xb0 [ 42.641237] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 42.646179] ? trace_hardirqs_off_caller+0x69/0x210 [ 42.651327] ? do_syscall_64+0x21/0x620 [ 42.655331] do_syscall_64+0xf9/0x620 [ 42.659136] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.664312] RIP: 0033:0x440599 [ 42.667576] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 42.686691] RSP: 002b:00007ffcf28e0858 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 42.694409] RAX: ffffffffffffffda RBX: 00000000004a173e RCX: 0000000000440599 [ 42.701702] RDX: 000000000000006c RSI: 00000000200003c0 RDI: 0000000000000005 [ 42.708966] RBP: 54c6c2ff093a6d32 R08: 00000000004002c8 R09: 00000000004002c8 [ 42.716215] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000010000 [ 42.725063] R13: 0000000000401eb0 R14: 0000000000000000 R15: 0000000000000000 [ 42.732450] Modules linked in: [ 42.735813] ---[ end trace 90b9c5ea5a54d6d9 ]--- [ 42.740618] RIP: 0010:fq_codel_enqueue+0xa63/0x1190 [ 42.745652] Code: 00 00 00 e8 5f 17 a9 fb 48 8b 44 24 38 80 38 00 0f 85 c4 05 00 00 48 be 00 00 00 00 00 fc ff df 49 8b 07 48 89 c2 48 c1 ea 03 <80> 3c 32 00 0f 85 52 05 00 00 48 8b 10 48 8d 78 28 48 b9 00 00 00 [ 42.765400] RSP: 0018:ffff888089a2f6d0 EFLAGS: 00010246 [ 42.770806] RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 [ 42.778211] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000000 [ 42.785509] RBP: ffff888089a2f7d0 R08: ffff888091cb02c0 R09: ffffffff8aafb008 [ 42.792820] R10: ffffffff8aafb017 R11: ffffffff8aafb010 R12: ffff888089a2f8a0 [ 42.800151] R13: 0000000000000000 R14: 0000000000000400 R15: ffff8880864a0180 [ 42.807504] FS: 000000000122c880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 42.815732] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.822021] CR2: 00007fe9c578f020 CR3: 000000009e1eb000 CR4: 00000000001406f0 [ 42.829354] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.836625] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.843937] Kernel panic - not syncing: Fatal exception in interrupt [ 42.851848] Kernel Offset: disabled [ 42.855471] Rebooting in 86400 seconds..