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: 30d, last: 8d13h

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 (10):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-akaros-main	2018/07/21 00:30	https://github.com/akaros/akaros.git/master	9196d29ad275f90b1e2bd0fd821fe2b48730d5f2	8cc079c3f60f253f57b715c3d87937541d03fae9	.config	log	report	syz	C	[]
ci-akaros-main	2018/08/11 16:03	https://github.com/akaros/akaros.git/master	8b21413cae5f20467e6c60e4eb110d79e2ae0675	7a88b14122b5b70ed04bcd75932f411256e1662b	.config	log	report			[]
ci-akaros-main	2018/08/10 23:17	https://github.com/akaros/akaros.git/master	8b21413cae5f20467e6c60e4eb110d79e2ae0675	7a88b14122b5b70ed04bcd75932f411256e1662b	.config	log	report			[]
ci-akaros-main	2018/08/07 12:23	https://github.com/akaros/akaros.git/master	8b21413cae5f20467e6c60e4eb110d79e2ae0675	1beb81367ce08594953fd11d686589b9613c3a97	.config	log	report			[]
ci-akaros-main	2018/08/07 02:54	https://github.com/akaros/akaros.git/master	8b21413cae5f20467e6c60e4eb110d79e2ae0675	1beb81367ce08594953fd11d686589b9613c3a97	.config	log	report			[]
ci-akaros-main	2018/08/03 11:19	https://github.com/akaros/akaros.git/master	8b21413cae5f20467e6c60e4eb110d79e2ae0675	cc4f6d0a87c12822e08cf8bdc7eae805fda10479	.config	log	report			[]
ci-akaros-main	2018/07/31 18:42	https://github.com/akaros/akaros.git/master	8b21413cae5f20467e6c60e4eb110d79e2ae0675	8ef497b65213b43164bcb9437d0c5bdd986cd52c	.config	log	report			[]
ci-akaros-main	2018/07/23 19:30	https://github.com/akaros/akaros.git/master	c5f7000db927d48d1d9b70016d2de8f5dab6fca4	f69c5fcd766adfb7894e1b0cd35f42c633f16419	.config	log	report			[]
ci-akaros-main	2018/07/23 12:44	https://github.com/akaros/akaros.git/master	9196d29ad275f90b1e2bd0fd821fe2b48730d5f2	f69c5fcd766adfb7894e1b0cd35f42c633f16419	.config	log	report			[]
ci-akaros-main	2018/07/21 16:58	https://github.com/akaros/akaros.git/master	9196d29ad275f90b1e2bd0fd821fe2b48730d5f2	8cc079c3f60f253f57b715c3d87937541d03fae9	.config	log	report			[]