Niklas Haas bb88e29539 swscale/alphablend: don't overread alpha plane on subsampled odd size ...

This function overreads the input plane for odd dimensions, because the
chroma plane is always rounded up, which means (xy << subsample) + 1 exceeds
the actual alpha plane size.

To verify:
  valgrind ffmpeg -pix_fmt yuva420p -f lavfi -i color -vf \
  "scale=1x1,format=yuva420p,scale=alphablend=uniform_color,format=yuv420p \
  -vframes 1 -f null -

Fixes: https://trac.ffmpeg.org/ticket/11692
(cherry picked from commit b7946098b1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

2026-06-19 15:58:40 +02:00

..

aarch64

all: apply linter fixes

2025-12-07 15:54:59 +00:00

arm

arm: Consistently use proper interworking function returns

2024-10-10 23:56:10 +03:00

loongarch

swscale: Fix out-of-bounds write errors in yuv2rgb_lasx.c file.

2026-06-19 15:58:40 +02:00

ppc

swscale/ppc: fix ASAN stack-buffer-overflow in yuv2planeX

2026-06-18 20:31:04 +02:00

riscv

swscale/rgb2rgb: enable R-V V deinterleaveBytes

2024-09-04 22:04:11 +03:00

tests

swscale/tests/swscale: Add help text

2024-02-15 23:07:44 +01:00

x86

swscale/x86/rgb_2_rgb: fix uyvytoyuv422 overwrite on odd width

2026-06-18 20:31:07 +02:00

alphablend.c

swscale/alphablend: don't overread alpha plane on subsampled odd size

2026-06-19 15:58:40 +02:00

bayer_template.c

swscale: do not drop half of bits from 16bit bayer formats

2020-08-08 12:03:42 +02:00

gamma.c

all: apply linter fixes

2025-12-07 15:54:59 +00:00

half2float.c

swscale/input: add rgbaf16 input support

2022-08-19 22:09:36 +02:00

hscale_fast_bilinear.c

…

hscale.c

avutil/common: Don't auto-include mem.h

2024-03-31 00:08:43 +01:00

input.c

swscale: add GBRAP14 format support

2023-09-28 19:37:58 +02:00

libswscale.v

build: Change structure of the linker version script templates

2016-05-29 16:43:11 +02:00

log2_tab.c

…

Makefile

swscale/input: add rgbaf16 input support

2022-08-19 22:09:36 +02:00

options.c

swscale/options: relax src/dst_h/v_chr_pos value range

2024-08-16 11:43:37 +02:00

output.c

swscale/output: fix integer overflows in chroma in yuv2rgba64_X_c_template()

2026-05-04 15:57:19 +02:00

rgb2rgb_template.c

swscale/rgb2rgb_template: use unsigned for <<24

2026-06-18 20:30:59 +02:00

rgb2rgb.c

sws/rgb2rgb: RISC-V V shuffle_bytes_xxxx functions

2022-09-30 07:24:09 +02:00

rgb2rgb.h

swscale/rgb2rgb: improve chroma conversion in ff_rgb24toyv12_c

2024-09-06 23:06:32 +02:00

slice.c

swscale/slice: clear allocated memory in alloc_lines()

2025-01-03 18:28:42 +01:00

swscale_internal.h

swscale: export ff_copyPlane so it may be used by simd code

2024-08-26 11:04:46 +02:00

swscale_unscaled.c

swscale/swscale_unscaled: adjust last line copy

2026-05-04 15:57:33 +02:00

swscale.c

swscale/swscale: Use unsigned operation to avoid undefined behavior

2024-09-19 00:10:38 +02:00

swscale.h

swscale: document SWS_FULL_CHR_H_* flags

2024-08-16 11:43:37 +02:00

swscaleres.rc

…

utils.c

swscale/utils: Check *Inc

2026-05-04 15:57:17 +02:00

version_major.h

libs: bump major version for all libraries

2024-03-07 11:29:43 -03:00

version.c

lib*/version: Use static_assert for static asserts

2024-03-31 00:08:42 +01:00

version.h

*/version.h: bump minor versions for release/7.1

2024-09-24 17:07:30 +02:00

vscale.c

all: apply linter fixes

2025-12-07 15:54:59 +00:00

yuv2rgb.c

swscale/yuv2rgb: add yuv42{0,2}p -> gbrp unscaled colorspace converters

2024-08-18 22:26:11 +02:00