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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2017-09-13 15:36:21 +0000 |
|---|---|---|
| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2017-09-13 15:36:21 +0000 |
| commit | dc65da6b9984802cc80b7e6dd2d8107d07cdc189 (patch) | |
| tree | 817111381776eafbbbd584b10bbdc58d6119447a /converter/other/pnmtopalm/palmtopnm.c | |
| parent | bb4482a2ce2372759c573301a3c6329f4aa975d6 (diff) | |
| download | netpbm-mirror-dc65da6b9984802cc80b7e6dd2d8107d07cdc189.tar.gz netpbm-mirror-dc65da6b9984802cc80b7e6dd2d8107d07cdc189.tar.xz netpbm-mirror-dc65da6b9984802cc80b7e6dd2d8107d07cdc189.zip | |
Fix crash when corrupt image has invalid color index
git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@3058 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'converter/other/pnmtopalm/palmtopnm.c')
| -rw-r--r-- | converter/other/pnmtopalm/palmtopnm.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/converter/other/pnmtopalm/palmtopnm.c b/converter/other/pnmtopalm/palmtopnm.c index b7e9c096..b80ef34a 100644 --- a/converter/other/pnmtopalm/palmtopnm.c +++ b/converter/other/pnmtopalm/palmtopnm.c @@ -686,11 +686,16 @@ doTransparent(FILE * const ofP, if (hasTransparency) { if (colormap) { Color_s const color = transparentIndex << 24; - Color const actualColor = (bsearch(&color, - colormap->color_entries, - colormap->ncolors, - sizeof(color), - palmcolor_compare_indices)); + Color const actualColor = bsearch(&color, + colormap->color_entries, + colormap->ncolors, + sizeof(color), + palmcolor_compare_indices); + if (!actualColor) + pm_error("Invalid input; transparent index %u " + "is not among the %u colors in the image's colormap", + transparentIndex, colormap->ncolors); + fprintf(ofP, "#%02x%02x%02x\n", (unsigned int) ((*actualColor >> 16) & 0xFF), (unsigned int) ((*actualColor >> 8) & 0xFF), @@ -1025,6 +1030,13 @@ convertRowToPnmNotDirect(const unsigned char * const palmrow, colormap->ncolors, sizeof(color2), palmcolor_compare_indices); + + if (!actualColor) + pm_error("Invalid input. A color index in column %u " + "is %u, which is not among the %u colors " + "in the colormap", + j, color, colormap->ncolors); + PPM_ASSIGN(xelrow[j], (*actualColor >> 16) & 0xFF, (*actualColor >> 8) & 0xFF, @@ -1125,11 +1137,11 @@ showHistogram(unsigned int * const seen, colorIndex, graymap[colorIndex], seen[colorIndex]); else { Color_s const color = colorIndex << 24; - Color const actualColor = (bsearch(&color, - colormap->color_entries, - colormap->ncolors, - sizeof(color), - palmcolor_compare_indices)); + Color const actualColor = bsearch(&color, + colormap->color_entries, + colormap->ncolors, + sizeof(color), + palmcolor_compare_indices); if (actualColor) pm_message("%.3d -> %ld,%ld,%ld: %d", colorIndex, (*actualColor >> 16) & 0xFF, |