diff options
Diffstat (limited to 'third_party/libtiff/tif_next.c')
| -rw-r--r-- | third_party/libtiff/tif_next.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/third_party/libtiff/tif_next.c b/third_party/libtiff/tif_next.c index 17e031111a..b2076a0b01 100644 --- a/third_party/libtiff/tif_next.c +++ b/third_party/libtiff/tif_next.c @@ -37,7 +37,7 @@ case 0: op[0] = (unsigned char) ((v) << 6); break; \ case 1: op[0] |= (v) << 4; break; \ case 2: op[0] |= (v) << 2; break; \ - case 3: *op++ |= (v); break; \ + case 3: *op++ |= (v); op_offset++; break; \ } \ } @@ -106,6 +106,7 @@ NeXTDecode(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) uint32 imagewidth = tif->tif_dir.td_imagewidth; if( isTiled(tif) ) imagewidth = tif->tif_dir.td_tilewidth; + tmsize_t op_offset = 0; /* * The scanline is composed of a sequence of constant @@ -122,10 +123,15 @@ NeXTDecode(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) * bounds, potentially resulting in a security * issue. */ - while (n-- > 0 && npixels < imagewidth) + while (n-- > 0 && npixels < imagewidth && op_offset < scanline) SETPIXEL(op, grey); if (npixels >= imagewidth) break; + if (op_offset >= scanline ) { + TIFFErrorExt(tif->tif_clientdata, module, "Invalid data for scanline %ld", + (long) tif->tif_row); + return (0); + } if (cc == 0) goto bad; n = *bp++, cc--; |