diff options
author | Campbell Barton <ideasman42@gmail.com> | 2021-05-27 10:16:08 +0300 |
---|---|---|
committer | Campbell Barton <ideasman42@gmail.com> | 2021-05-27 10:59:21 +0300 |
commit | 41f2ea4045b183b7e2d0c5f61d7ab7958267122e (patch) | |
tree | 044d173db6e928798c27a2c014497869e9594f11 /source/blender/draw/engines/overlay/overlay_motion_path.c | |
parent | 1276d0024fb66825ec219ba742187cfcf338cbd2 (diff) |
Fix incorrect BLI_snprintf usage
Event though in practice this wasn't causing problems as the fixed size
buffers are generally large enough not to truncate text.
Using the result from `snprint` or `BLI_snprintf` to step over a fixed
size buffer allows for buffer overruns as the returned value is the size
needed to copy the entire string, not the number of bytes copied.
Building strings using this convention with multiple calls:
ofs += BLI_snprintf(str + ofs, str_len_max - ofs);
.. caused the size argument to become negative,
wrapping it to a large value when cast to the unsigned argument.
Diffstat (limited to 'source/blender/draw/engines/overlay/overlay_motion_path.c')
-rw-r--r-- | source/blender/draw/engines/overlay/overlay_motion_path.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/source/blender/draw/engines/overlay/overlay_motion_path.c b/source/blender/draw/engines/overlay/overlay_motion_path.c index 48b7b53a5ba..a92f11aca38 100644 --- a/source/blender/draw/engines/overlay/overlay_motion_path.c +++ b/source/blender/draw/engines/overlay/overlay_motion_path.c @@ -190,7 +190,7 @@ static void motion_path_cache(OVERLAY_Data *vedata, bool is_keyframe = (mpv->flag & MOTIONPATH_VERT_KEY) != 0; if ((show_keyframes && show_keyframes_no && is_keyframe) || (show_frame_no && (i == 0))) { - numstr_len = BLI_snprintf(numstr, sizeof(numstr), " %d", frame); + numstr_len = BLI_snprintf_rlen(numstr, sizeof(numstr), " %d", frame); DRW_text_cache_add( dt, mpv->co, numstr, numstr_len, 0, 0, txt_flag, (is_keyframe) ? col_kf : col); } @@ -200,7 +200,7 @@ static void motion_path_cache(OVERLAY_Data *vedata, /* Only draw frame number if several consecutive highlighted points * don't occur on same point. */ if ((equals_v3v3(mpv->co, mpvP->co) == 0) || (equals_v3v3(mpv->co, mpvN->co) == 0)) { - numstr_len = BLI_snprintf(numstr, sizeof(numstr), " %d", frame); + numstr_len = BLI_snprintf_rlen(numstr, sizeof(numstr), " %d", frame); DRW_text_cache_add(dt, mpv->co, numstr, numstr_len, 0, 0, txt_flag, col); } } |