From: Christoph Hellwig <hch@lst.de>
To: Arusekk <arek_koz@o2.pl>
Cc: Christoph Hellwig <hch@lst.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Alexey Dobriyan <adobriyan@gmail.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: [PATCH] proc: Use seq_read_iter where possible
Date: Wed, 28 Apr 2021 15:03:39 +0200 [thread overview]
Message-ID: <20210428130339.GA30329@lst.de> (raw)
In-Reply-To: <9905352.nUPlyArG6x@swift.dev.arusekk.pl>
On Wed, Apr 28, 2021 at 03:02:13PM +0200, Arusekk wrote:
> The instructions at the entry point of the executable being inspected.
> The flow of the tool:
> - parse ELF headers of the binary to be inspected,
> - locate its entry point position in the file,
> - write short code at the location (this short code has used sendfile so far),
> - execute the patched binary,
> - parse the output and extract information about the relevant mappings.
> This can be seen as equivalent to setting LD_TRACE_LOADED_OBJECTS,
> but also works for static binaries, and is a bit safer.
>
> The problem was reported at:
> https://github.com/Gallopsled/pwntools/issues/1871
Oh, this patches just the userspace binarz, ok.
> > Linus did object to blindly switching over all instances.
>
> I know, I read that, but I thought that pointing a real use case, combined
> with the new interface being used all throughout the other code, might be
> convincing.
> I would be happy with only changing the f_ops of /proc/.../maps, even if only
> on MMU-enabled systems, but I thought that consistence would be better.
> This is my first time contributing to Linux, so I am very sorry for any wrong
> assumptions, and glad to learn more.
Unless Linus changed his mind just patching the file you care about for
now seems like the best idea.
next prev parent reply other threads:[~2021-04-28 13:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-27 18:34 [PATCH] proc: Use seq_read_iter where possible Arkadiusz Kozdra (Arusekk)
2021-04-28 6:12 ` Christoph Hellwig
2021-04-28 13:02 ` Arusekk
2021-04-28 13:03 ` Christoph Hellwig [this message]
2021-04-28 17:46 ` Linus Torvalds
2021-04-29 10:05 ` [PATCH v2] proc: Use seq_read_iter for /proc/*/maps Arkadiusz Kozdra (Arusekk)
2021-04-29 10:07 ` Greg Kroah-Hartman
2021-05-04 11:53 ` [PATCH v3] " Arkadiusz Kozdra (Arusekk)
2021-05-04 16:01 ` Linus Torvalds
2021-05-04 20:23 ` Arusekk
2021-05-04 20:24 ` Linus Torvalds
2021-04-29 16:36 ` [PATCH v2] " Linus Torvalds
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