From: Will Deacon <will@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: kernel-team@android.com, akpm@linux-foundation.org,
Will Deacon <will@kernel.org>,
"K . Prasad" <prasad@linux.vnet.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Frederic Weisbecker <frederic@kernel.org>,
Christoph Hellwig <hch@lst.de>,
Quentin Perret <qperret@google.com>,
Alexei Starovoitov <ast@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>
Subject: [PATCH 3/3] kallsyms: Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
Date: Fri, 21 Feb 2020 11:44:04 +0000 [thread overview]
Message-ID: <20200221114404.14641-4-will@kernel.org> (raw)
In-Reply-To: <20200221114404.14641-1-will@kernel.org>
kallsyms_lookup_name() and kallsyms_on_each_symbol() are exported to
modules despite having no in-tree users and being wide open to abuse by
out-of-tree modules that can use them as a method to invoke arbitrary
non-exported kernel functions.
Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol().
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Quentin Perret <qperret@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
---
kernel/kallsyms.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index a9b3f660dee7..16c8c605f4b0 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -175,7 +175,6 @@ unsigned long kallsyms_lookup_name(const char *name)
}
return module_kallsyms_lookup_name(name);
}
-EXPORT_SYMBOL_GPL(kallsyms_lookup_name);
int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
unsigned long),
@@ -194,7 +193,6 @@ int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
}
return module_kallsyms_on_each_symbol(fn, data);
}
-EXPORT_SYMBOL_GPL(kallsyms_on_each_symbol);
static unsigned long get_symbol_pos(unsigned long addr,
unsigned long *symbolsize,
--
2.25.0.265.gbab2e86ba0-goog
next prev parent reply other threads:[~2020-02-21 11:44 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 11:44 [PATCH 0/3] Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() Will Deacon
2020-02-21 11:44 ` [PATCH 1/3] samples/hw_breakpoint: Drop HW_BREAKPOINT_R when reporting writes Will Deacon
2020-02-21 14:12 ` Christoph Hellwig
2020-02-21 11:44 ` [PATCH 2/3] samples/hw_breakpoint: Drop use of kallsyms_lookup_name() Will Deacon
2020-02-21 14:13 ` Christoph Hellwig
2020-02-21 14:20 ` Will Deacon
2020-02-21 11:44 ` Will Deacon [this message]
2020-02-21 11:53 ` [PATCH 3/3] kallsyms: Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() Greg Kroah-Hartman
2020-02-21 14:14 ` Christoph Hellwig
2020-02-21 15:11 ` Alexei Starovoitov
2020-02-21 14:27 ` [PATCH 0/3] " Masami Hiramatsu
2020-02-21 14:48 ` Will Deacon
2020-02-21 23:44 ` Masami Hiramatsu
2020-02-21 15:41 ` David Laight
2020-02-21 16:25 ` Quentin Perret
2020-02-25 10:05 ` Miroslav Benes
2020-02-25 12:11 ` Petr Mladek
2020-02-25 15:00 ` Joe Lawrence
2020-02-25 18:01 ` Miroslav Benes
2020-02-26 14:16 ` Joe Lawrence
2020-03-02 19:28 ` Mathieu Desnoyers
2020-03-02 19:36 ` Greg Kroah-Hartman
2020-03-02 19:39 ` Greg Kroah-Hartman
2020-03-02 20:17 ` Mathieu Desnoyers
2020-03-03 6:57 ` Greg Kroah-Hartman
2020-03-03 16:58 ` Mathieu Desnoyers
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200221114404.14641-4-will@kernel.org \
--to=will@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=ast@kernel.org \
--cc=frederic@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=hch@lst.de \
--cc=kernel-team@android.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mhiramat@kernel.org \
--cc=prasad@linux.vnet.ibm.com \
--cc=qperret@google.com \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).