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btrfs-progs: don't leak in set_extent_bits

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It looks possible to hit the search_again label without using the
prealloc.  A new prealloc is allocated, leaking the current one.

Every use of prealloc sets it to null so let's just allocate a new
prealloc when we don't already have one.

Signed-off-by: Zach Brown <zab@redhat.com>
This commit is contained in:
Zach Brown 2013-01-23 12:18:32 -08:00
parent de763395fb
commit 09fac3824d
1 changed files with 5 additions and 3 deletions
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8
extent_io.c
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@ -300,9 +300,11 @@ int set_extent_bits(struct extent_io_tree *tree, u64 start,
u64 last_start;
u64 last_end;
again:
prealloc = alloc_extent_state();
if (!prealloc)
return -ENOMEM;
if (!prealloc) {
prealloc = alloc_extent_state();
if (!prealloc)
return -ENOMEM;
}
/*
* this search will find the extents that end after