libXfont: Changes to 'master'

[GitLab Mirror]

 src/fc/fserve.c |   40 +++++++++++++++++++---------------------
 1 file changed, 19 insertions(+), 21 deletions(-)

New commits:
commit 9529d2351fe52ffaaf9342343865073d5c5b6802
Author: Peter Harris <pharris at opentext.com>
Date:   Tue Mar 2 14:39:45 2021 -0500

    Fix use after free when font server connection lost
    
    If there are multiple blocks waiting for the same font, only one of them
    will have ->freeFont set. The rest will be in a state of FS_DEPENDING.
    
    If the font server dies before the font finishes opening, the block with
    ->freeFont set will call ->unload_font, invalidating the pfont pointers
    in the remaining FS_DEPENDING blocks.
    
    Avoid a use after free (and potential crash) by passing conn to
    fs_cleanup_font instead of dereferencing pfont to find the conn.
    
    Signed-off-by: Peter Harris <pharris at opentext.com>