dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2024-12-26 13:48:21 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

pnmdec,PAM: set bytes_per_px based on depth when missing

Browse Source 
this avoids setting bytes_per_px < depth causing an undersized
allocation for rgb import resulting in a crash.

BUG=b/37930872

Change-Id: I32a86f91528acc084a53d08c9fde9f2f1270a603
This commit is contained in:
James Zern 2017-05-10 19:15:50 -04:00
parent 4d7084350e
commit 645f0c53de
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
imageio/pnmdec.c
View File

@ -113,7 +113,7 @@ static size_t ReadPAMFields(PNMInfo* const info, size_t off) {
}
if (!(info->seen_flags & TUPLE_FLAG)) {
info->seen_flags |= TUPLE_FLAG;
info->bytes_per_px = 3;
info->bytes_per_px = info->depth * (info->max_value > 255 ? 2 : 1);
}
if (info->seen_flags != ALL_NEEDED_FLAGS) {
fprintf(stderr, "PAM: incomplete header.\n");
@ -156,6 +156,7 @@ static size_t ReadHeader(PNMInfo* const info) {
if (info->width <= 0 || info->height <= 0 ||
info->type <= 0 || info->type >= 9 ||
info->depth <= 0 || info->depth > 4 ||
info->bytes_per_px < info->depth ||
info->max_value <= 0 || info->max_value >= 65536) {
return 0;
}