This is a note to let you know that I've just added the patch titled
ext3: Properly count journal credits for long symlinks
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ext3-properly-count-journal-credits-for-long-symlinks.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <sta...@kernel.org> know about it.
>From d2db60df1e7eb39cf0f378dfc4dd8813666d46ef Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sand...@redhat.com>
Date: Thu, 11 Aug 2011 09:51:46 -0500
Subject: ext3: Properly count journal credits for long symlinks
From: Eric Sandeen <sand...@redhat.com>
commit d2db60df1e7eb39cf0f378dfc4dd8813666d46ef upstream.
Commit ae54870a1dc9 ("ext3: Fix lock inversion in ext3_symlink()")
recalculated the number of credits needed for a long symlink, in the
process of splitting it into two transactions. However, the first
credit calculation under-counted because if selinux is enabled, credits
are needed to create the selinux xattr as well.
Overrunning the reservation will result in an OOPS in
journal_dirty_metadata() due to this assert:
J_ASSERT_JH(jh, handle->h_buffer_credits > 0);
Fix this by increasing the reservation size.
Signed-off-by: Eric Sandeen <sand...@redhat.com>
Reviewed-by: Jan Kara <j...@suse.cz>
Acked-by: "Theodore Ts'o" <ty...@mit.edu>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
fs/ext3/namei.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -2210,9 +2210,11 @@ static int ext3_symlink (struct inode *
/*
* For non-fast symlinks, we just allocate inode and put it on
* orphan list in the first transaction => we need bitmap,
- * group descriptor, sb, inode block, quota blocks.
+ * group descriptor, sb, inode block, quota blocks, and
+ * possibly selinux xattr blocks.
*/
- credits = 4 + EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb);
+ credits = 4 + EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
+ EXT3_XATTR_TRANS_BLOCKS;
} else {
/*
* Fast symlink. We have to add entry to directory
Patches currently in stable-queue which might be from sand...@redhat.com are
queue-3.0/ext3-properly-count-journal-credits-for-long-symlinks.patch
queue-3.0/ext4-properly-count-journal-credits-for-long-symlinks.patch
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