Malc, thanks taking a look.
I'm able to trigger the problem on non-SMP virtme with 4GiB ram, but
I'm not able to trigger it on my SMP host with 16GiB.
The slab info from dmesg (on 4GiB run):
Unreclaimable slab info:
SCTPv6 31068KB 31068KB
sctp_chunk 24321KB 2
On Tue, Jul 16, 2019 at 10:49 PM Marek Majkowski wrote:
>
> Morning,
>
> My poor man's fuzzer found something interesting in SCTP. It seems
> like creating large number of SCTP sockets + some magic dance, upsets
> a memory subsystem related to SCTP. The sequence:
>
> - create SCTP socket
> - cal
On Tue, Jul 16, 2019 at 11:47:40PM +0200, Marek Majkowski wrote:
> Morning,
>
> My poor man's fuzzer found something interesting in SCTP. It seems
> like creating large number of SCTP sockets + some magic dance, upsets
> a memory subsystem related to SCTP. The sequence:
>
> - create SCTP socket
Morning,
My poor man's fuzzer found something interesting in SCTP. It seems
like creating large number of SCTP sockets + some magic dance, upsets
a memory subsystem related to SCTP. The sequence:
- create SCTP socket
- call setsockopts (SCTP_EVENTS)
- call bind(::1, port)
- call sendmsg(long
