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Patches/Linux_CVEs/CVE-2013-2015/^3.8/0001.patch

@@ -0,0 +1,48 @@
+From 016a3592cc34fa349235b5a8b48af5cece2cbfeb Mon Sep 17 00:00:00 2001
+From: Theodore Ts'o <tytso@mit.edu>
+Date: Thu, 27 Dec 2012 01:42:50 -0500
+Subject: [PATCH] ext4: avoid hang when mounting non-journal filesystems with
+ orphan list
+
+commit 0e9a9a1ad619e7e987815d20262d36a2f95717ca upstream.
+
+When trying to mount a file system which does not contain a journal,
+but which does have a orphan list containing an inode which needs to
+be truncated, the mount call with hang forever in
+ext4_orphan_cleanup() because ext4_orphan_del() will return
+immediately without removing the inode from the orphan list, leading
+to an uninterruptible loop in kernel code which will busy out one of
+the CPU's on the system.
+
+This can be trivially reproduced by trying to mount the file system
+found in tests/f_orphan_extents_inode/image.gz from the e2fsprogs
+source tree.  If a malicious user were to put this on a USB stick, and
+mount it on a Linux desktop which has automatic mounts enabled, this
+could be considered a potential denial of service attack.  (Not a big
+deal in practice, but professional paranoids worry about such things,
+and have even been known to allocate CVE numbers for such problems.)
+
+-js: This is a fix for CVE-2013-2015.
+
+Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
+Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
+Acked-by: Jan Kara <jack@suse.cz>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ fs/ext4/namei.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
+index 9fb3fae4898a..54ad9a54cd89 100644
+--- a/fs/ext4/namei.c
++++ b/fs/ext4/namei.c
+@@ -2054,7 +2054,8 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
+ 	int err = 0;
+ 
+ 	/* ext4_handle_valid() assumes a valid handle_t pointer */
+-	if (handle && !ext4_handle_valid(handle))
++	if (handle && !ext4_handle_valid(handle) &&
++	    !(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ORPHAN_FS))
+ 		return 0;
+ 
+ 	mutex_lock(&EXT4_SB(inode->i_sb)->s_orphan_lock);