From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Wed, 14 Oct 2015 14:15:27 +0000 (-0400)
Subject: compress: fix mmap error handling
X-Git-Tag: v228~198^2~2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e06851720573d3adb4be54a1decfe35bc750b8f4;p=thirdparty%2Fsystemd.git

compress: fix mmap error handling
---

diff --git a/src/journal/compress.c b/src/journal/compress.c
index 8e8403f6f8b..4ada0f12fd7 100644
--- a/src/journal/compress.c
+++ b/src/journal/compress.c
@@ -460,7 +460,7 @@ int compress_stream_lz4(int fdf, int fdt, uint64_t max_bytes) {
                 return -EINVAL;
 
         src = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fdf, 0);
-        if (!src)
+        if (src == MAP_FAILED)
                 return -errno;
 
         log_debug("Buffer size is %zu bytes, header size %zu bytes.", size, n);
@@ -688,7 +688,7 @@ static int decompress_stream_lz4_v2(int in, int out, uint64_t max_bytes) {
                 return -ENOMEM;
 
         src = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, in, 0);
-        if (!src)
+        if (src == MAP_FAILED)
                 return -errno;
 
         while (total_in < (size_t) st.st_size) {