linux-kernel - Re: [PATCHSET] saner elf compat

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Message-ID: <20201223071213.GX3579531@ZenIV.linux.org.uk>
Date:   Wed, 23 Dec 2020 07:12:13 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     "Maciej W. Rozycki" <macro@...ux-mips.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        linux-mips@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>,
        Denys Vlasenko <dvlasenk@...hat.com>
Subject: Re: [PATCHSET] saner elf compat

On Wed, Dec 23, 2020 at 07:03:20AM +0000, Al Viro wrote:

	Argh....  Wrong commit blamed - the parent of the correct one.
It's actually 2aa362c49c31 ("coredump: extend core dump note section to
contain file names of mapped files").  My apologies - fat-fingered
cut'n'paste...

	siginfo commit does suffer the same problem, but it becomes an issue
only for 32bit processes under mips64 big-endian kernel (there it yields
e.g. zero .__sigfault.si_addr in $_siginfo when using gdb with a coredump
of 32bit process, whatever the actual faulting address had been).  And
b-e mips64 is rather uncommon, so that's less of an issue.