From: ebiederm@xmission.com (Eric W. Biederman)
To: Christoph Hellwig <hch@lst.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Jeremy Kerr <jk@ozlabs.org>, Arnd Bergmann <arnd@arndb.de>,
linuxppc-dev@lists.ozlabs.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: remove set_fs calls from the exec and coredump code v2
Date: Fri, 17 Apr 2020 17:41:52 -0500 [thread overview]
Message-ID: <87r1wl68gf.fsf@x220.int.ebiederm.org> (raw)
In-Reply-To: <20200414070142.288696-1-hch@lst.de> (Christoph Hellwig's message of "Tue, 14 Apr 2020 09:01:34 +0200")
Christoph Hellwig <hch@lst.de> writes:
> Hi all,
>
> this series gets rid of playing with the address limit in the exec and
> coredump code. Most of this was fairly trivial, the biggest changes are
> those to the spufs coredump code.
>
> Changes since v1:
> - properly spell NUL
> - properly handle the compat siginfo case in ELF coredumps
Quick question is exec from a kernel thread within the scope of what you
are looking at?
There is a set_fs(USER_DS) in flush_old_exec whose sole purpose appears
to be to allow exec from kernel threads. Where the kernel threads
run with set_fs(KERNEL_DS) until they call exec.
Eric
next prev parent reply other threads:[~2020-04-17 22:44 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-14 7:01 remove set_fs calls from the exec and coredump code v2 Christoph Hellwig
2020-04-14 7:01 ` [PATCH 1/8] powerpc/spufs: simplify spufs core dumping Christoph Hellwig
2020-04-14 7:01 ` [PATCH 2/8] signal: clean up __copy_siginfo_to_user32 Christoph Hellwig
2020-04-17 21:08 ` Eric W. Biederman
2020-04-17 21:09 ` [PATCH 1/2] signal: Factor copy_siginfo_to_external32 from copy_siginfo_to_user32 Eric W. Biederman
2020-04-18 8:05 ` Christophe Leroy
2020-04-18 11:55 ` Eric W. Biederman
2020-04-19 8:13 ` Christoph Hellwig
2020-04-19 9:46 ` Christophe Leroy
2020-04-19 9:54 ` Christophe Leroy
2020-04-19 8:05 ` Christoph Hellwig
2020-04-17 21:09 ` [PATCH 2/2] signal: Remove the set_fs in binfmt_elf.c:fill_siginfo_note Eric W. Biederman
2020-04-19 8:03 ` [PATCH 2/8] signal: clean up __copy_siginfo_to_user32 Christoph Hellwig
2020-04-14 7:01 ` [PATCH 3/8] signal: replace __copy_siginfo_to_user32 with to_compat_siginfo Christoph Hellwig
2020-04-14 14:00 ` Arnd Bergmann
2020-04-14 7:01 ` [PATCH 4/8] binfmt_elf: open code copy_siginfo_to_user to kernelspace buffer Christoph Hellwig
2020-04-14 13:15 ` Arnd Bergmann
2020-04-15 7:45 ` Christoph Hellwig
2020-04-15 8:20 ` Arnd Bergmann
2020-04-17 13:27 ` Christoph Hellwig
2020-04-17 18:10 ` Eric W. Biederman
2020-04-17 20:06 ` Arnd Bergmann
2020-04-15 3:01 ` Michael Ellerman
2020-04-15 6:19 ` Christoph Hellwig
2020-04-14 7:01 ` [PATCH 5/8] binfmt_elf: remove the set_fs(KERNEL_DS) in elf_core_dump Christoph Hellwig
2020-04-14 7:01 ` [PATCH 6/8] binfmt_elf_fdpic: remove the set_fs(KERNEL_DS) in elf_fdpic_core_dump Christoph Hellwig
2020-04-14 7:01 ` [PATCH 7/8] exec: simplify the copy_strings_kernel calling convention Christoph Hellwig
2020-04-14 7:01 ` [PATCH 8/8] exec: open code copy_string_kernel Christoph Hellwig
2020-04-18 8:15 ` Christophe Leroy
2020-04-19 8:06 ` Christoph Hellwig
2020-04-19 9:44 ` Christophe Leroy
2020-04-17 22:41 ` Eric W. Biederman [this message]
2020-04-19 8:19 ` remove set_fs calls from the exec and coredump code v2 Christoph Hellwig
2020-04-19 11:50 ` Eric W. Biederman
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