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Fix NFS NULL pointer deref with ipv6 (rhbz 1099761)

This commit is contained in:
Josh Boyer 2014-06-11 16:22:22 -04:00
parent 10d5137948
commit 1724a9954b
2 changed files with 46 additions and 0 deletions
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39
NFS-populate-net-in-mount-data-when-remounting.patch Normal file
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@ -0,0 +1,39 @@
Bugzilla: 1099761
Upstream-status: 3.16 and CC'd for stable
From a914722f333b3359d2f4f12919380a334176bb89 Mon Sep 17 00:00:00 2001
From: Mateusz Guzik <mguzik@redhat.com>
Date: Tue, 10 Jun 2014 12:44:12 +0200
Subject: [PATCH] NFS: populate ->net in mount data when remounting
Otherwise the kernel oopses when remounting with IPv6 server because
net is dereferenced in dev_get_by_name.
Use net ns of current thread so that dev_get_by_name does not operate on
foreign ns. Changing the address is prohibited anyway so this should not
affect anything.
Signed-off-by: Mateusz Guzik <mguzik@redhat.com>
Cc: linux-nfs@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 3.4+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/super.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 1a6d7ac9d9d2..084af1060d79 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2260,6 +2260,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen;
data->version = nfsvers;
data->minorversion = nfss->nfs_client->cl_minorversion;
+ data->net = current->nsproxy->net_ns;
memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr,
data->nfs_server.addrlen);
--
1.9.3

7
kernel.spec
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@ -728,6 +728,9 @@ Patch25096: drm-i915-set-backlight-duty-cycle-after-backlight-enable-for-gen4.pa
#rhbz 1064516
Patch25098: e1000e-Failure-to-write-SHRA-turns-on-PROMISC-mode.patch
#rhbz 1099761
Patch25099: NFS-populate-net-in-mount-data-when-remounting.patch
# END OF PATCH DEFINITIONS
%endif
@ -1424,6 +1427,9 @@ ApplyPatch drm-i915-set-backlight-duty-cycle-after-backlight-enable-for-gen4.pat
#rhbz 1064516
ApplyPatch e1000e-Failure-to-write-SHRA-turns-on-PROMISC-mode.patch
#rhbz 1099761
ApplyPatch NFS-populate-net-in-mount-data-when-remounting.patch
# END OF PATCH APPLICATIONS
%endif
@ -2237,6 +2243,7 @@ fi
# || ||
%changelog
* Wed Jun 11 2014 Josh Boyer <jwboyer@fedoraproject.org>
- Fix NFS NULL pointer deref with ipv6 (rhbz 1099761)
- Fix promisc mode on certain e1000e cards (rhbz 1064516)
- Fix i915 backlight issue on gen4 (rhbz 1094066)