The patch titled
fat: Fix _fat_bmap() race
has been removed from the -mm tree. Its filename was
fat-fix-_fat_bmap-race.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: fat: Fix _fat_bmap() race
From: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
fat_get_cluster() assumes the requested blocknr isn't truncated during
read. _fat_bmap() doesn't follow this rule.
This protects it by ->i_mutex.
Signed-off-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fat/inode.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff -puN fs/fat/inode.c~fat-fix-_fat_bmap-race fs/fat/inode.c
--- a/fs/fat/inode.c~fat-fix-_fat_bmap-race
+++ a/fs/fat/inode.c
@@ -199,7 +199,14 @@ static ssize_t fat_direct_IO(int rw, str
static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
{
- return generic_block_bmap(mapping, block, fat_get_block);
+ sector_t blocknr;
+
+ /* fat_get_cluster() assumes the requested blocknr isn't truncated. */
+ mutex_lock(&mapping->host->i_mutex);
+ blocknr = generic_block_bmap(mapping, block, fat_get_block);
+ mutex_unlock(&mapping->host->i_mutex);
+
+ return blocknr;
}
static const struct address_space_operations fat_aops = {
_
Patches currently in -mm which might be from hirofumi@xxxxxxxxxxxxxxxxxx are
linux-next.patch
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