linux-ext4 - [Bug 12793] ext4 gives wrong errno with too long extended attribute values

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Message-Id: <200908071502.n77F2I8X018452@demeter.kernel.org>
Date:	Fri, 7 Aug 2009 15:02:18 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 12793] ext4 gives wrong errno with too long extended attribute
 values

http://bugzilla.kernel.org/show_bug.cgi?id=12793


Narendra Prasad Madanapalli <narendramind@...il.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |narendramind@...il.com




--- Comment #1 from Narendra Prasad Madanapalli <narendramind@...il.com>  2009-08-07 15:02:16 ---
The following patch fixes the issue.

====Patch starts
iff -uNr linux-2.6.30.3-orig/fs/ext4/xattr.c linux-2.6.30.3-fix/fs/ext4/xattr.c
--- linux-2.6.30.3-orig/fs/ext4/xattr.c    2009-07-25 03:17:51.000000000 +0530
+++ linux-2.6.30.3-fix/fs/ext4/xattr.c    2009-08-07 20:27:40.907412651 +0530
@@ -698,7 +698,7 @@
 #define header(x) ((struct ext4_xattr_header *)(x))

     if (i->value && i->value_len > sb->s_blocksize)
-        return -ENOSPC;
+        return -E2BIG;
     if (s->base) {
         ce = mb_cache_entry_get(ext4_xattr_cache, bs->bh->b_bdev,
                     bs->bh->b_blocknr);
====Patch ends

Ran test_xattr.py on the kernel with above fix, it terminates with OSError 7.

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