The patch titled
Subject: ELF, uapi: fixup ELF_ST_TYPE definition
has been added to the -mm mm-nonmm-unstable branch. Its filename is
elf-uapi-fixup-elf_st_type-definition.patch
This patch should soon appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: ELF, uapi: fixup ELF_ST_TYPE definition
This is very theoretical compile failure:
ELF_ST_TYPE(st_info = A)
Cast will bind first and st_info will stop being lvalue:
error: lvalue required as left operand of assignment
Given that the only use of this macro is
ELF_ST_TYPE(sym->st_info)
where st_info is "unsigned char" I've decided to remove cast especially
given that companion macro ELF_ST_BIND doesn't use cast.
Link: https://lkml.kernel.org/r/Ymv7G1BeX4kt3obz@localhost.localdomain
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/uapi/linux/elf.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/uapi/linux/elf.h~elf-uapi-fixup-elf_st_type-definition
+++ a/include/uapi/linux/elf.h
@@ -134,7 +134,7 @@ typedef __s64 Elf64_Sxword;
#define STT_TLS 6
#define ELF_ST_BIND(x) ((x) >> 4)
-#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
+#define ELF_ST_TYPE(x) ((x) & 0xf)
#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
#define ELF64_ST_BIND(x) ELF_ST_BIND(x)
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
proc-fix-dentry-inode-overinstantiating-under-proc-pid-net.patch
elf-uapi-fixup-elf_st_type-definition.patch
