This is a note to let you know that I've just added the patch titled
ext4: fix error return from ext4_ext_handle_uninitialized_extents()
to the 3.13-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:
ext4-fix-error-return-from-ext4_ext_handle_uninitialized_extents.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From ce37c42919608e96ade3748fe23c3062a0a966c5 Mon Sep 17 00:00:00 2001
From: Eric Whitney <[email protected]>
Date: Wed, 19 Feb 2014 18:52:39 -0500
Subject: ext4: fix error return from ext4_ext_handle_uninitialized_extents()
From: Eric Whitney <[email protected]>
commit ce37c42919608e96ade3748fe23c3062a0a966c5 upstream.
Commit 3779473246 breaks the return of error codes from
ext4_ext_handle_uninitialized_extents() in ext4_ext_map_blocks(). A
portion of the patch assigns that function's signed integer return
value to an unsigned int. Consequently, negatively valued error codes
are lost and can be treated as a bogus allocated block count.
Signed-off-by: Eric Whitney <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/ext4/extents.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4128,7 +4128,7 @@ int ext4_ext_map_blocks(handle_t *handle
struct ext4_extent newex, *ex, *ex2;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
ext4_fsblk_t newblock = 0;
- int free_on_err = 0, err = 0, depth;
+ int free_on_err = 0, err = 0, depth, ret;
unsigned int allocated = 0, offset = 0;
unsigned int allocated_clusters = 0;
struct ext4_allocation_request ar;
@@ -4189,9 +4189,13 @@ int ext4_ext_map_blocks(handle_t *handle
if (!ext4_ext_is_uninitialized(ex))
goto out;
- allocated = ext4_ext_handle_uninitialized_extents(
+ ret = ext4_ext_handle_uninitialized_extents(
handle, inode, map, path, flags,
allocated, newblock);
+ if (ret < 0)
+ err = ret;
+ else
+ allocated = ret;
goto out3;
}
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.13/ext4-fix-partial-cluster-handling-for-bigalloc-file-systems.patch
queue-3.13/ext4-fix-premature-freeing-of-partial-clusters-split-across-leaf-blocks.patch
queue-3.13/ext4-fix-error-return-from-ext4_ext_handle_uninitialized_extents.patch
--
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