Re: 2.6.23-rc4-mm1: unpingable box and NULL dereference at tcp_rto_min()

Satyam Sharma
2007-09-02T04:49:18Z

On Sun, 2 Sep 2007, Alexey Dobriyan wrote:
>
> Unable to handle kernel NULL pointer dereference at 0000000000000039 RIP:
> [<ffffffff803b6f7c>] tcp_rto_min+0xc/0x20

tcp_rto_min() lacks a check-for-NULL. You want 5c127c58ae9bf196 from
the net-2.6.git tree -- so this will be gone in -rc6.

> P.S.: uh-oh, it's "[TCP] Allow minnimum RTO ..." aka 05bb1fad1cde

Yup, it came from this last commit in net-2.6 before -rc5.

[ Considering it's pretty core code (and thus the oops fairly easily
reproducible), I initially thought this must've come from net-2.6.24.
I suspect lot of testers might hit this, so would be wise to put that
patch up as a hot-fix ? ]

Satyam