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authorAlexey Dobriyan <adobriyan@gmail.com>2020-01-31 09:17:01 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-31 21:30:41 +0300
commit18676ffcee596079037b1767e4efe38b06f05eb8 (patch)
tree35df6ca21f4098d69d2fb64c878ee795d486ab6a /fs/binfmt_elf.c
parent03c6d723eeac2d7beaa6d9682768469659088d77 (diff)
downloadlinux-18676ffcee596079037b1767e4efe38b06f05eb8.tar.xz
fs/binfmt_elf.c: make BAD_ADDR() unlikely
If some mapping goes past TASK_SIZE it will be rejected by kernel which means no such userspace binaries exist. Mark every such check as unlikely. Link: http://lkml.kernel.org/r/20191215124355.GA21124@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/binfmt_elf.c')
-rw-r--r--fs/binfmt_elf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 9afb5ed5b2d0..e79e5a7216bd 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -97,7 +97,7 @@ static struct linux_binfmt elf_format = {
.min_coredump = ELF_EXEC_PAGESIZE,
};
-#define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE)
+#define BAD_ADDR(x) (unlikely((unsigned long)(x) >= TASK_SIZE))
static int set_brk(unsigned long start, unsigned long end, int prot)
{