[coreboot-gerrit] Change in coreboot[master]: lib/lzma: Respect dstn argument

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/25222

Change subject: lib/lzma: Respect dstn argument
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lib/lzma: Respect dstn argument

Don't write more bytes than the caller requests.
Based on I484b5c1e3809781033d146609a35a9e5e666c8ed.

Change-Id: I336de417c7cd6f35cf84947fc4ae161c15bd93ef
Signed-off-by: Patrick Rudolph 
---
M src/lib/lzma.c
1 file changed, 2 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/22/25222/1

diff --git a/src/lib/lzma.c b/src/lib/lzma.c
index f727553..dbc464c 100644
--- a/src/lib/lzma.c
+++ b/src/lib/lzma.c
@@ -37,6 +37,8 @@
     * byte and re-construct. */
    cp = src + LZMA_PROPERTIES_SIZE;
    outSize = cp[3] << 24 | cp[2] << 16 | cp[1] << 8 | cp[0];
+	if (outSize > dstn)
+		outSize = dstn;
    if (LzmaDecodeProperties(&state.Properties, properties,
    			 LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK) {
    	printk(BIOS_WARNING, "lzma: Incorrect stream properties.\n");