patch 9.0.2129: [security]: use-after-free in call_dfunc() Commit: https://github.com/vim/vim/commit/a555069b7d790abedc60edc505bd35bda257949d Author: mityu <mityu.mail@gmail.com> Date: Sat Nov 25 15:41:20 2023 +0100 patch 9.0.2129: [security]: use-after-free in call_dfunc() Problem: [security]: use-after-free in call_dfunc() Solution: Refresh dfunc pointer closes: #13571 This Commit fixes a SEGV caused by a use-after-free bug in call_dfunc(). When calling check_ufunc_arg_types() from the call_dfunc() it may cause def functions to be re-compiled and if there are too many def functions, the def_functions array will be re-allocated. Which means, that the dfunc pointer in call_dfunc() now starts pointing to freed memory. So we need to reset the dfunc pointer after calling check_ufunc_arg_types(). Let's also add a test, to ensure we do not regress. Signed-off-by: mityu <mityu.mail@gmail.com> Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com> Signed-off-by: Christian Brabandt <cb@256bit.org>

# The most simplistic Makefile, for MinGW and Cygwin gcc on MS-DOS

ifndef USEDLL
USEDLL = no
endif

ifeq (yes, $(USEDLL))
DEFINES =
LIBS    = -lc
else
DEFINES =
LIBS    =
endif

CC = gcc
CFLAGS = -O2 -Wall -DWIN32 $(DEFINES)

ifneq (sh.exe, $(SHELL))
DEL = rm
else
DEL = del
endif

xxd.exe: xxd.c
	$(CC) $(CFLAGS) -s -o xxd.exe xxd.c $(LIBS)

clean:
	-$(DEL) xxd.exe