diff options
| author | Lasse Collin <lasse.collin@tukaani.org> | 2019-11-15 17:34:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-11-15 18:34:00 -0800 |
| commit | 8e20ba2e53fc6198cbfbcc700e9f884157052a8d (patch) | |
| tree | 8e9a6ff8aea2fb572ba1a3e6b964ff9eb9f7efab /lib/xz | |
| parent | 82072962973008201b817fae1896512977dd5083 (diff) | |
| download | lwn-8e20ba2e53fc6198cbfbcc700e9f884157052a8d.tar.gz lwn-8e20ba2e53fc6198cbfbcc700e9f884157052a8d.zip | |
lib/xz: fix XZ_DYNALLOC to avoid useless memory reallocations
s->dict.allocated was initialized to 0 but never set after a successful
allocation, thus the code always thought that the dictionary buffer has
to be reallocated.
Link: http://lkml.kernel.org/r/20191104185107.3b6330df@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reported-by: Yu Sun <yusun2@cisco.com>
Acked-by: Daniel Walker <danielwa@cisco.com>
Cc: "Yixia Si (yisi)" <yisi@cisco.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/xz')
| -rw-r--r-- | lib/xz/xz_dec_lzma2.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/xz/xz_dec_lzma2.c b/lib/xz/xz_dec_lzma2.c index 08c3c8049998..156f26fdc4c9 100644 --- a/lib/xz/xz_dec_lzma2.c +++ b/lib/xz/xz_dec_lzma2.c @@ -1146,6 +1146,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_reset(struct xz_dec_lzma2 *s, uint8_t props) if (DEC_IS_DYNALLOC(s->dict.mode)) { if (s->dict.allocated < s->dict.size) { + s->dict.allocated = s->dict.size; vfree(s->dict.buf); s->dict.buf = vmalloc(s->dict.size); if (s->dict.buf == NULL) { |