From: Linus Torvalds <torvalds@linux-foundation.org>
To: Jann Horn <jannh@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
"Eric W . Biederman" <ebiederm@xmission.com>,
Oleg Nesterov <oleg@redhat.com>,
Russell King <linux@armlinux.org.uk>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Mark Salter <msalter@redhat.com>,
Aurelien Jacquiot <jacquiot.aurelien@gmail.com>,
linux-c6x-dev@linux-c6x.org,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
Linux-sh list <linux-sh@vger.kernel.org>
Subject: Re: [PATCH 2/5] coredump: Fix handling of partial writes in dump_emit()
Date: Mon, 27 Apr 2020 20:35:45 -0700 [thread overview]
Message-ID: <CAHk-=wjSYTpTH0X8EcGGJD84tsJS62BN3tC6NfzmjvXdSkFVxg@mail.gmail.com> (raw)
In-Reply-To: <20200428032745.133556-3-jannh@google.com>
On Mon, Apr 27, 2020 at 8:28 PM Jann Horn <jannh@google.com> wrote:
>
> After a partial write, we have to update the input buffer pointer.
Interesting. It seems this partial write case never triggers (except
for actually killing the core-dump).
Or did you find a case where it actually matters?
Your fix is obviously correct, but it also makes me go "that function
clearly never actually worked for partial writes, maybe we shouldn't
even bother?"
Linus
next prev parent reply other threads:[~2020-04-28 3:36 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-28 3:27 [PATCH 0/5] Fix ELF / FDPIC ELF core dumping, and use mmap_sem properly in there Jann Horn
2020-04-28 3:27 ` [PATCH 1/5] binfmt_elf_fdpic: Stop using dump_emit() on user pointers on !MMU Jann Horn
2020-04-28 3:27 ` [PATCH 2/5] coredump: Fix handling of partial writes in dump_emit() Jann Horn
2020-04-28 3:35 ` Linus Torvalds [this message]
2020-04-28 5:52 ` Jann Horn
2020-04-28 16:40 ` Rob Landley
2020-04-28 16:40 ` Linus Torvalds
2020-04-28 3:27 ` [PATCH 3/5] coredump: Refactor page range dumping into common helper Jann Horn
2020-04-28 3:27 ` [PATCH 4/5] binfmt_elf, binfmt_elf_fdpic: Use a VMA list snapshot Jann Horn
2020-04-28 3:27 ` [PATCH 5/5] mm/gup: Take mmap_sem in get_dump_page() Jann Horn
2020-04-28 3:50 ` Linus Torvalds
2020-04-28 6:10 ` Jann Horn
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