syzkaller login: [ 68.735934][ T27] audit: type=1400 audit(1563577098.074:35): avc: denied { map } for pid=9522 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 Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. executing program [ 75.203043][ T27] audit: type=1400 audit(1563577104.544:36): avc: denied { map } for pid=9534 comm="syz-executor808" path="/root/syz-executor808818416" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 75.206318][ T9534] netlink: 4 bytes leftover after parsing attributes in process `syz-executor808'. [ 75.251921][ T9534] kasan: CONFIG_KASAN_INLINE enabled [ 75.259031][ T9534] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 75.273514][ T9534] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 75.296833][ T9534] CPU: 1 PID: 9534 Comm: syz-executor808 Not tainted 5.2.0+ #62 [ 75.328952][ T9534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.339106][ T9534] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 75.344454][ T9534] Code: 00 00 48 c7 c7 40 c2 da 88 e8 f0 8c a2 fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c7 85 e8 fe ff ff 00 00 00 00 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e2 [ 75.364035][ T9534] RSP: 0018:ffff888095d66eb8 EFLAGS: 00010246 [ 75.370086][ T9534] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11012b1f1d8 [ 75.378045][ T9534] RDX: 0000000000000000 RSI: 1ffff11012b1f1df RDI: 0000000000000282 [ 75.386035][ T9534] RBP: ffff888095d67060 R08: 0000000000000002 R09: ffff8880958f8ec8 [ 75.393984][ T9534] R10: fffffbfff134a0cf R11: ffffffff89a5067f R12: 0000000000000001 [ 75.401953][ T9534] R13: ffff88809b6b5b40 R14: ffff888095d678c0 R15: 0000000000000000 [ 75.409903][ T9534] FS: 00005555566be880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 75.418807][ T9534] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.425365][ T9534] CR2: 0000000020000180 CR3: 000000009cecd000 CR4: 00000000001406e0 [ 75.434012][ T9534] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.455347][ T9534] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.472980][ T9534] Call Trace: [ 75.476269][ T9534] ? tc_lookup_action_n+0xd2/0x100 [ 75.485632][ T9534] ? __add_metainfo+0x480/0x480 [ 75.494738][ T9534] ? tc_lookup_action_n+0xd2/0x100 [ 75.505854][ T9534] ? __kasan_check_read+0x11/0x20 [ 75.517844][ T9534] ? lock_downgrade+0x920/0x920 [ 75.526961][ T9534] ? __kasan_check_write+0x14/0x20 [ 75.540601][ T9534] ? do_raw_read_unlock+0x3f/0x70 [ 75.559053][ T9534] tcf_action_init_1+0x6f2/0xa80 [ 75.564360][ T9534] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.575236][ T9534] ? tcf_action_dump_old+0x80/0x80 [ 75.583021][ T9534] ? is_bpf_text_address+0xac/0x170 [ 75.588202][ T9534] ? __kasan_check_read+0x11/0x20 [ 75.593290][ T9534] ? __lock_acquire+0x8a2/0x4c30 [ 75.598204][ T9534] tcf_action_init+0x241/0x360 [ 75.602947][ T9534] ? tcf_action_init_1+0xa80/0xa80 [ 75.608032][ T9534] ? lock_downgrade+0x920/0x920 [ 75.612865][ T9534] ? mark_lock+0xc0/0x11e0 [ 75.617261][ T9534] tcf_action_add+0xe8/0x370 [ 75.621826][ T9534] ? tca_action_gd+0x1710/0x1710 [ 75.626752][ T9534] ? mark_held_locks+0x93/0xf0 [ 75.631504][ T9534] ? __nla_parse+0x43/0x60 [ 75.635898][ T9534] tc_ctl_action+0x3b5/0x4bc [ 75.640488][ T9534] ? tcf_action_add+0x370/0x370 [ 75.645321][ T9534] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.651537][ T9534] ? tcf_action_add+0x370/0x370 [ 75.656367][ T9534] rtnetlink_rcv_msg+0x463/0xb00 [ 75.661285][ T9534] ? rtnetlink_put_metrics+0x580/0x580 [ 75.666720][ T9534] ? lock_downgrade+0x920/0x920 [ 75.671549][ T9534] ? netlink_deliver_tap+0x22d/0xbf0 [ 75.676812][ T9534] ? find_held_lock+0x35/0x130 [ 75.681554][ T9534] netlink_rcv_skb+0x177/0x450 [ 75.686293][ T9534] ? rtnetlink_put_metrics+0x580/0x580 [ 75.691727][ T9534] ? netlink_ack+0xb30/0xb30 [ 75.696306][ T9534] ? __kasan_check_read+0x11/0x20 [ 75.701308][ T9534] ? netlink_deliver_tap+0x254/0xbf0 [ 75.706568][ T9534] rtnetlink_rcv+0x1d/0x30 [ 75.710958][ T9534] netlink_unicast+0x531/0x710 [ 75.715696][ T9534] ? netlink_attachskb+0x7c0/0x7c0 [ 75.720782][ T9534] ? _copy_from_iter_full+0x25d/0x8a0 [ 75.726128][ T9534] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.732439][ T9534] netlink_sendmsg+0x8a5/0xd60 [ 75.737186][ T9534] ? netlink_unicast+0x710/0x710 [ 75.742272][ T9534] ? tomoyo_socket_sendmsg+0x26/0x30 [ 75.747556][ T9534] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.753801][ T9534] ? security_socket_sendmsg+0x8d/0xc0 [ 75.759343][ T9534] ? netlink_unicast+0x710/0x710 [ 75.764257][ T9534] sock_sendmsg+0xd7/0x130 [ 75.768656][ T9534] ___sys_sendmsg+0x803/0x920 [ 75.773311][ T9534] ? copy_msghdr_from_user+0x440/0x440 [ 75.778752][ T9534] ? prep_transhuge_page+0xa0/0xa0 [ 75.783859][ T9534] ? percpu_counter_add_batch+0x13c/0x190 [ 75.789568][ T9534] ? __do_page_fault+0x56a/0xdd0 [ 75.794611][ T9534] ? find_held_lock+0x35/0x130 [ 75.799372][ T9534] ? __do_page_fault+0x56a/0xdd0 [ 75.804311][ T9534] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.810535][ T9534] ? __fget_light+0x1a9/0x230 [ 75.815192][ T9534] ? __fdget+0x1b/0x20 [ 75.819255][ T9534] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 75.825760][ T9534] __sys_sendmsg+0x105/0x1d0 [ 75.830329][ T9534] ? __sys_sendmsg_sock+0xd0/0xd0 [ 75.835332][ T9534] ? down_read_non_owner+0x450/0x450 [ 75.840598][ T9534] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 75.846029][ T9534] ? do_syscall_64+0x26/0x6a0 [ 75.850680][ T9534] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.856723][ T9534] ? do_syscall_64+0x26/0x6a0 [ 75.861474][ T9534] __x64_sys_sendmsg+0x78/0xb0 [ 75.866221][ T9534] do_syscall_64+0xfd/0x6a0 [ 75.870721][ T9534] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.876590][ T9534] RIP: 0033:0x4401d9 [ 75.880462][ T9534] 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 [ 75.900130][ T9534] RSP: 002b:00007ffe8cdc2398 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 75.908522][ T9534] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 75.916468][ T9534] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 75.924431][ T9534] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 75.932383][ T9534] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 75.940335][ T9534] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 75.948285][ T9534] Modules linked in: [ 75.952595][ T9534] ---[ end trace 9186a1f752a14cc0 ]--- [ 75.958058][ T9534] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 75.963839][ T9534] Code: 00 00 48 c7 c7 40 c2 da 88 e8 f0 8c a2 fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c7 85 e8 fe ff ff 00 00 00 00 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e2 [ 75.983472][ T9534] RSP: 0018:ffff888095d66eb8 EFLAGS: 00010246 [ 75.989560][ T9534] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11012b1f1d8 [ 75.997511][ T9534] RDX: 0000000000000000 RSI: 1ffff11012b1f1df RDI: 0000000000000282 [ 76.005597][ T9534] RBP: ffff888095d67060 R08: 0000000000000002 R09: ffff8880958f8ec8 [ 76.013583][ T9534] R10: fffffbfff134a0cf R11: ffffffff89a5067f R12: 0000000000000001 [ 76.021586][ T9534] R13: ffff88809b6b5b40 R14: ffff888095d678c0 R15: 0000000000000000 [ 76.029572][ T9534] FS: 00005555566be880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 76.038479][ T9534] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.045074][ T9534] CR2: 0000000020000180 CR3: 000000009cecd000 CR4: 00000000001406e0 [ 76.053775][ T9534] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.064413][ T9534] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.072429][ T9534] Kernel panic - not syncing: Fatal exception [ 76.079704][ T9534] Kernel Offset: disabled [ 76.084318][ T9534] Rebooting in 86400 seconds..