Revision 447ac906e189535e77dcb1f4bbe3f1bc917d4c12 authored by Patrick Steinhardt on 01 December 2022, 14:45:31 UTC, committed by Junio C Hamano on 05 December 2022, 06:14:16 UTC
The `struct attr_stack` tracks the stack of all patterns together with their attributes. When parsing a gitattributes file that has more than 2^31 such patterns though we may trigger multiple out-of-bounds reads on 64 bit platforms. This is because while the `num_matches` variable is an unsigned integer, we always use a signed integer to iterate over them. I have not been able to reproduce this issue due to memory constraints on my systems. But despite the out-of-bounds reads, the worst thing that can seemingly happen is to call free(3P) with a garbage pointer when calling `attr_stack_free()`. Fix this bug by using unsigned integers to iterate over the array. While this makes the iteration somewhat awkward when iterating in reverse, it is at least better than knowingly running into an out-of-bounds read. While at it, convert the call to `ALLOC_GROW` to use `ALLOC_GROW_BY` instead. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 34ace8b
add-interactive.h
#ifndef ADD_INTERACTIVE_H
#define ADD_INTERACTIVE_H
#include "color.h"
struct add_i_state {
struct repository *r;
int use_color;
char header_color[COLOR_MAXLEN];
char help_color[COLOR_MAXLEN];
char prompt_color[COLOR_MAXLEN];
char error_color[COLOR_MAXLEN];
char reset_color[COLOR_MAXLEN];
char fraginfo_color[COLOR_MAXLEN];
char context_color[COLOR_MAXLEN];
char file_old_color[COLOR_MAXLEN];
char file_new_color[COLOR_MAXLEN];
int use_single_key;
char *interactive_diff_filter, *interactive_diff_algorithm;
};
void init_add_i_state(struct add_i_state *s, struct repository *r);
void clear_add_i_state(struct add_i_state *s);
struct repository;
struct pathspec;
int run_add_i(struct repository *r, const struct pathspec *ps);
enum add_p_mode {
ADD_P_ADD,
ADD_P_STASH,
ADD_P_RESET,
ADD_P_CHECKOUT,
ADD_P_WORKTREE,
};
int run_add_p(struct repository *r, enum add_p_mode mode,
const char *revision, const struct pathspec *ps);
#endif
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