IPSEC crashes after r253088
Maciej Milewski
milu at dat.pl
Sat Jul 20 23:04:42 UTC 2013
On 20.07.2013 22:43, Taku YAMAMOTO wrote:
> After r253088, systems with IPSEC and KSTACK_PAGES < 4 crashes on
> booting into multi-user mode.
>
> The crash is due to sysctl -a in /etc/rc.d/initrandom ended up with
> kernel stack overflow.
>
>
> The problem is what we have in sys/net/vnet.h:
>
> #define SYSCTL_VNET_PCPUSTAT(parent, nbr, name, type, array, desc) \
> static int \
> array##_sysctl(SYSCTL_HANDLER_ARGS) \
> { \
> type s; \
> CTASSERT((sizeof(type) / sizeof(uint64_t)) == \
> (sizeof(VNET(array)) / sizeof(counter_u64_t))); \
> COUNTER_ARRAY_COPY(VNET(array), &s, sizeof(type) / sizeof(uint64_t));\
> if (req->newptr) \
> COUNTER_ARRAY_ZERO(VNET(array), \
> sizeof(type) / sizeof(uint64_t)); \
> return (SYSCTL_OUT(req, &s, sizeof(type))); \
> } \
> SYSCTL_VNET_PROC(parent, nbr, name, CTLTYPE_OPAQUE | CTLFLAG_RW, NULL, \
> 0, array ## _sysctl, "I", desc)
>
> where type is struct ipsecstat which is 12560 bytes of size (larger than
> 3 pages) of size when processing net.inet.ipsec.ipsecstats.
>
I can confirm. I've been hit by that problem on MIPS platform.
--
Pozdrawiam,
Maciej Milewski
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