From: Kangjie Lu <kangjielu@gmail.com>
To: catalin.marinas@arm.com
Cc: will.deacon@arm.com, james.morse@arm.com,
linux-kernel@vger.kernel.org, Kangjie Lu <kjlu@gatech.edu>
Subject: [PATCH] fix infoleak in mm
Date: Tue, 3 May 2016 16:36:08 -0400 [thread overview]
Message-ID: <1462307768-5929-1-git-send-email-kjlu@gatech.edu> (raw)
The stack object “si” has a total size of 128; however, only 20
bytes are initialized. The remaining uninitialized bytes are sent
to userland via send_signal
Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
---
arch/arm64/mm/fault.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 95df28b..f790eda 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -117,6 +117,7 @@ static void __do_user_fault(struct task_struct *tsk, unsigned long addr,
{
struct siginfo si;
+ memset(&si, 0, sizeof(si));
if (unhandled_signal(tsk, sig) && show_unhandled_signals_ratelimited()) {
pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x\n",
tsk->comm, task_pid_nr(tsk), fault_name(esr), sig,
--
1.9.1
next reply other threads:[~2016-05-03 20:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-03 20:36 Kangjie Lu [this message]
2016-05-04 10:31 ` Catalin Marinas
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=1462307768-5929-1-git-send-email-kjlu@gatech.edu \
--to=kangjielu@gmail.com \
--cc=catalin.marinas@arm.com \
--cc=james.morse@arm.com \
--cc=kjlu@gatech.edu \
--cc=linux-kernel@vger.kernel.org \
--cc=will.deacon@arm.com \
/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
all inboxes | Powered by JetHome®