[FFmpeg-cvslog] swscale/utils: check mprotect() return code

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Wed Oct 23 10:14:05 2013 +0200| [eb4205cc89576d15cde6107e0f5dc0fabed29c40] | committer: Michael Niedermayer

swscale/utils: check mprotect() return code

Found-by: wm4
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=eb4205cc89576d15cde6107e0f5dc0fabed29c40
---

 libswscale/utils.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libswscale/utils.c b/libswscale/utils.c
index 9b2b5e9..0743ee3 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -1430,8 +1430,11 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
                                 c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
 
 #if USE_MMAP
-            mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ);
-            mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ);
+            if (   mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1
+                || mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1) {
+                av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n");
+                goto fail;
+            }
 #endif
         } else
 #endif /* HAVE_MMXEXT_INLINE */