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Commit 6d205f12 authored by Vladimir Saveliev's avatar Vladimir Saveliev Committed by Linus Torvalds
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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: default avatarVladimir Saveliev <vs@namesys.com>
Cc: <reiserfs-dev@namesys.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 505fa2c4

fs/reiserfs/item_ops.c

+1 −1
Original line number Diff line number Diff line
@@ -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)