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[PATCH] reiserfs: fix key decrementing 

This patch fixes a bug in function decrementing a key of stat data item.

Offset of reiserfs keys are compared as signed values.  To set key offset
to maximal possible value maximal signed value has to be used.

This bug is responsible for severe reiserfs filesystem corruption which
shows itself as warning vs-13060.  reiserfsck fixes this corruption by
filesystem tree rebuilding.

Signed-off-by: Vladimir Saveliev <vs@namesys.com>
Cc: <reiserfs-dev@namesys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vladimir Saveliev 2007-04-11 23:28:44 -07:00 committed by Linus Torvalds
parent 505fa2c4a2
commit 6d205f1205
1 changed files with 1 additions and 1 deletions
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2
fs/reiserfs/item_ops.c
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@ -23,7 +23,7 @@ static void sd_decrement_key(struct cpu_key *key)
{
key->on_disk_key.k_objectid--;
set_cpu_key_k_type(key, TYPE_ANY);
set_cpu_key_k_offset(key, (loff_t) (-1));
set_cpu_key_k_offset(key, (loff_t)(~0ULL >> 1));
}
static int sd_is_left_mergeable(struct reiserfs_key *key, unsigned long bsize)