From: Nick Alcock <nix@esperi.org.uk>
To: Kris Van Hees <kris.van.hees@oracle.com>
Cc: dtrace@lists.linux.dev, dtrace-devel@oss.oracle.com
Subject: Re: [PATCH 14/20] test: detect strlen corruption of strtab rodata and zeros
Date: Fri, 06 Nov 2026 13:14:04 +0000 [thread overview]
Message-ID: <87eccyrtk3.fsf@esperi.org.uk> (raw)
In-Reply-To: <87se1ertqu.fsf@esperi.org.uk>
On 6 Nov 2026, Nick Alcock told this:
> On 30 Oct 2026, Kris Van Hees verbalised:
>
>> + * ASSERTION: strlen() must not overwrite the IPv6 lookup table in the
>> + * rodata block of the strtab map.
>
> ... I'm not surprised you didn't spot this. Who would expect a strlen to
> overwrite anything? But now it works via dt_bpf_probe_read_str, it's
> writing into (a temporary entry in) the strtab as a side-effect, with a
> STRSZ max...
Oh yeah, and
Reviewed-by: Nick Alcock <nix@esperi.org.uk>
--
NULL && (void)
next prev parent reply other threads:[~2026-11-06 13:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-30 19:36 [PATCH 14/20] test: detect strlen corruption of strtab rodata and zeros Kris Van Hees
2026-11-06 13:10 ` Nick Alcock
2026-11-06 13:14 ` Nick Alcock [this message]
2026-11-06 21:26 ` Kris Van Hees
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