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Re: [Qemu-devel] Crashing in tcp_close

From: Samuel Thibault
Subject: Re: [Qemu-devel] Crashing in tcp_close
Date: Fri, 11 Nov 2016 23:09:11 +0100
User-agent: Mutt/1.5.21+34 (58baf7c9f32f) (2010-12-30)

Brian Candler, on Fri 11 Nov 2016 20:53:12 +0000, wrote:
> On 11/11/2016 16:17, Samuel Thibault wrote:
> >Could you increase the value given to valgrind's --num-callers= so we
> >can make sure the context of this call?
> OK: re-run with --num-callers=250. It took a few iterations, but I captured
> it again. (I have grepped out all the "invalid file descriptor" lines).


> ==1217== Thread 1:
> ==1217== Invalid read of size 4
> ==1217==    at 0x550B5B: if_start (if.c:230)
> ==1217==    by 0x5550E2: slirp_pollfds_poll (slirp.c:770)
> ==1217==    by 0x5891EB: main_loop_wait (main-loop.c:508)
> ==1217==    by 0x2F4430: main_loop (vl.c:1908)
> ==1217==    by 0x2F4430: main (vl.c:4604)

Ooh, I see.  Now it's obvious, now that it's not coming from the tcb
loop :) Could you try the attached patch?


Attachment: patch
Description: Text document

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