Masahiro Yamada 8287687821 modpost: fix undefined behavior of is_arm_mapping_symbol() ... [ Upstream commit d6b732666a ] The return value of is_arm_mapping_symbol() is unpredictable when "$" is passed in. strchr(3) says: The strchr() and strrchr() functions return a pointer to the matched character or NULL if the character is not found. The terminating null byte is considered part of the string, so that if c is specified as '\0', these functions return a pointer to the terminator. When str[1] is '\0', strchr("axtd", str[1]) is not NULL, and str[2] is referenced (i.e. buffer overrun). Test code --------- char str1[] = "abc"; char str2[] = "ab"; strcpy(str1, "$"); strcpy(str2, "$"); printf("test1: %d\n", is_arm_mapping_symbol(str1)); printf("test2: %d\n", is_arm_mapping_symbol(str2)); Result ------ test1: 0 test2: 1 Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-14 18:32:44 +02:00
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.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
devicetable-offsets.c	soundwire: extend SDW_SLAVE_ENTRY	2020-06-30 21:26:17 +05:30
empty.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
file2alias.c	soundwire: extend SDW_SLAVE_ENTRY	2020-06-30 21:26:17 +05:30
Makefile	kbuild: introduce hostprogs-always-y and userprogs-always-y	2020-08-10 01:32:59 +09:00
mk_elfconfig.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
modpost.c	modpost: fix undefined behavior of is_arm_mapping_symbol()	2022-06-14 18:32:44 +02:00
modpost.h	modpost: change elf_info->size to size_t	2020-06-06 23:39:20 +09:00
sumversion.c	modpost: use read_text_file() and get_line() for reading text files	2020-06-06 23:38:13 +09:00