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Fix CVE-2011-3353

This commit is contained in:
Josh Boyer 2011-09-20 09:57:03 -04:00
parent b45a41b9eb
commit 18a614272e
2 changed files with 44 additions and 1 deletions
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34
fuse-check-size-of-FUSE_NOTIFY_INVAL_ENTRY-message.patch Normal file
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@ -0,0 +1,34 @@
From 6a7fc984c7bd3c98839e28c47f4a9a27af024ca7 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Wed, 24 Aug 2011 10:20:17 +0200
Subject: [PATCH] fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message
FUSE_NOTIFY_INVAL_ENTRY didn't check the length of the write so the
message processing could overrun and result in a "kernel BUG at
fs/fuse/dev.c:629!"
Reported-by: Han-Wen Nienhuys <hanwenn@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: stable@kernel.org
---
fs/fuse/dev.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index e5cdabf..517430a 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1208,6 +1208,10 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,
if (outarg.namelen > FUSE_NAME_MAX)
goto err;
+ err = -EINVAL;
+ if (size != sizeof(outarg) + outarg.namelen + 1)
+ goto err;
+
name.name = buf;
name.len = outarg.namelen;
err = fuse_copy_one(cs, buf, outarg.namelen + 1);
--
1.7.6

11
kernel.spec
View File

@ -48,7 +48,7 @@ Summary: The Linux kernel
# reset this by hand to 1 (or to 0 and then use rpmdev-bumpspec).
# scripts/rebase.sh should be made to do that for you, actually.
#
%global baserelease 97
%global baserelease 98
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -883,6 +883,9 @@ Patch14056: perf-Fix-software-event-overflow.patch
Patch14057: crypto-Move-md5_transform-to-lib-md5.c.patch
Patch14058: net-Compute-protocol-sequence-numbers-and-fragment-I.patch
# CVE-2011-3353
Patch14059: fuse-check-size-of-FUSE_NOTIFY_INVAL_ENTRY-message.patch
%endif
BuildRoot: %{_tmppath}/kernel-%{KVERREL}-root
@ -1665,6 +1668,9 @@ ApplyPatch perf-Fix-software-event-overflow.patch
ApplyPatch crypto-Move-md5_transform-to-lib-md5.c.patch
ApplyPatch net-Compute-protocol-sequence-numbers-and-fragment-I.patch
# CVE-2011-3353
ApplyPatch fuse-check-size-of-FUSE_NOTIFY_INVAL_ENTRY-message.patch
# END OF PATCH APPLICATIONS
%endif
@ -2251,6 +2257,9 @@ fi
# and build.
%changelog
* Tue Sep 20 2011 Josh Boyer <jwboyer@redhat.com>
- CVE-2011-3353: fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message
* Fri Sep 16 2011 Josh Boyer <jwboyer@redhat.com> 2.6.35.14-97
- CVE-2011-2918: perf: Fix software event overflow
- CVE-2011-3188: net: improve sequence number generation