assertion failed: BHLEN(bp) >= offsetof(struct etherpkt, data)

[akaros] assertion failed: BHLEN(bp) >= offsetof(struct etherpkt, data)
Status: upstream: reported C repro on 2018/07/21 00:31
Reported-by: syzbot+3d8007cb48c458a19837@syzkaller.appspotmail.com
First: 92d, last: 3d20h

Sample crash report:

kernel panic at kern/drivers/dev/ether.c:317, from core 0: assertion failed: BHLEN(bp) >= offsetof(struct etherpkt, data)
Stack Backtrace on Core 0:
#01 [<0xffffffffc200a2bc>] in backtrace at src/kdebug.c:220
#02 [<0xffffffffc2009afd>] in _panic at src/init.c:268
#03 [<0xffffffffc2077b63>] in etheriq at drivers/dev/ether.c:317
#04 [<0xffffffffc2077d2e>] in etheroq at drivers/dev/ether.c:424
#05 [<0xffffffffc2077faf>] in etherwrite at drivers/dev/ether.c:505
#06 [<0xffffffffc2040221>] in rwrite at src/ns/sysfile.c:1123
#07 [<0xffffffffc204043b>] in syswrite at src/ns/sysfile.c:1141
#08 [<0xffffffffc2055f61>] in sys_write at src/syscall.c:1785
#09 [<0xffffffffc2059439>] in syscall at src/syscall.c:2528
#10 [<0xffffffffc2059604>] in run_local_syscall at src/syscall.c:2563
#11 [<0xffffffffc2059b39>] in prep_syscalls at src/syscall.c:2583
#12 [<0xffffffffc20ab38a>] in sysenter_callwrapper at arch/x86/trap.c:854

All crashes (52):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro
ci-akaros-main	2018/07/21 00:30	https://github.com/akaros/akaros.git master	9196d29a	8cc079c3	.config	log	report	syz	C
ci-akaros-main	2018/10/17 09:51	https://github.com/akaros/akaros.git master	73001cbb	1ba7fd7e	.config	log	report
ci-akaros-main	2018/10/15 09:07	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/14 00:07	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/13 06:57	https://github.com/akaros/akaros.git master	73001cbb	caf12900	.config	log	report
ci-akaros-main	2018/10/12 06:06	https://github.com/akaros/akaros.git master	73001cbb	ba6ddb43	.config	log	report
ci-akaros-main	2018/10/11 20:40	https://github.com/akaros/akaros.git master	cde6e108	42c78641	.config	log	report
ci-akaros-main	2018/10/10 18:13	https://github.com/akaros/akaros.git master	cde6e108	5b11ac2c	.config	log	report
ci-akaros-main	2018/10/09 19:52	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/08 23:15	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/07 19:04	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/07 00:21	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/05 04:07	https://github.com/akaros/akaros.git master	fce2e832	8b311eaf	.config	log	report
ci-akaros-main	2018/10/01 06:16	https://github.com/akaros/akaros.git master	b2253c94	41e4b329	.config	log	report
ci-akaros-main	2018/09/30 13:11	https://github.com/akaros/akaros.git master	b2253c94	41e4b329	.config	log	report
ci-akaros-main	2018/09/29 08:10	https://github.com/akaros/akaros.git master	b2253c94	41e4b329	.config	log	report
ci-akaros-main	2018/09/29 01:39	https://github.com/akaros/akaros.git master	b2253c94	41e4b329	.config	log	report
ci-akaros-main	2018/09/27 23:33	https://github.com/akaros/akaros.git master	b2253c94	0c2fa87b	.config	log	report
ci-akaros-main	2018/09/27 18:02	https://github.com/akaros/akaros.git master	b2253c94	0c2fa87b	.config	log	report
ci-akaros-main	2018/09/27 10:04	https://github.com/akaros/akaros.git master	b2253c94	58fca249	.config	log	report
ci-akaros-main	2018/09/26 10:42	https://github.com/akaros/akaros.git master	b2253c94	455b6354	.config	log	report
ci-akaros-main	2018/09/25 15:00	https://github.com/akaros/akaros.git master	b2253c94	0e7547d7	.config	log	report
ci-akaros-main	2018/09/23 19:24	https://github.com/akaros/akaros.git master	3957e726	28d9ac76	.config	log	report
ci-akaros-main	2018/09/19 22:51	https://github.com/akaros/akaros.git master	3957e726	7f125108	.config	log	report
ci-akaros-main	2018/09/19 20:00	https://github.com/akaros/akaros.git master	3957e726	7f125108	.config	log	report
ci-akaros-main	2018/09/18 22:00	https://github.com/akaros/akaros.git master	3957e726	7f125108	.config	log	report
ci-akaros-main	2018/09/18 16:04	https://github.com/akaros/akaros.git master	3957e726	7f125108	.config	log	report
ci-akaros-main	2018/09/17 23:23	https://github.com/akaros/akaros.git master	3957e726	7f125108	.config	log	report
ci-akaros-main	2018/09/12 22:28	https://github.com/akaros/akaros.git master	15250424	71907daf	.config	log	report
ci-akaros-main	2018/09/11 19:30	https://github.com/akaros/akaros.git master	09363dc1	4ae17b1f	.config	log	report
ci-akaros-main	2018/09/07 17:28	https://github.com/akaros/akaros.git master	09363dc1	69cfeb80	.config	log	report
ci-akaros-main	2018/09/06 04:12	https://github.com/akaros/akaros.git master	09363dc1	873745f2	.config	log	report
ci-akaros-main	2018/09/05 13:48	https://github.com/akaros/akaros.git master	09363dc1	5c6bf6c5	.config	log	report
ci-akaros-main	2018/09/05 10:11	https://github.com/akaros/akaros.git master	09363dc1	5c6bf6c5	.config	log	report
ci-akaros-main	2018/09/04 18:19	https://github.com/akaros/akaros.git master	09363dc1	67669d11	.config	log	report
ci-akaros-main	2018/09/01 04:56	https://github.com/akaros/akaros.git master	09363dc1	19cfcead	.config	log	report
ci-akaros-main	2018/08/28 03:46	https://github.com/akaros/akaros.git master	e94ea40d	7ef1de9e	.config	log	report
ci-akaros-main	2018/08/27 20:32	https://github.com/akaros/akaros.git master	e94ea40d	758cd203	.config	log	report
ci-akaros-main	2018/08/26 18:31	https://github.com/akaros/akaros.git master	e94ea40d	758cd203	.config	log	report
ci-akaros-main	2018/08/26 10:13	https://github.com/akaros/akaros.git master	e94ea40d	758cd203	.config	log	report
ci-akaros-main	2018/08/26 05:29	https://github.com/akaros/akaros.git master	e94ea40d	76e7c3df	.config	log	report
ci-akaros-main	2018/08/24 18:07	https://github.com/akaros/akaros.git master	e94ea40d	9b0f5c75	.config	log	report