36 lines
1.1 KiB
Diff
36 lines
1.1 KiB
Diff
From fbeaf6c71be2273fde980395974e70eb8e1f4a80 Mon Sep 17 00:00:00 2001
|
|
From: Jerry James <loganjerry@gmail.com>
|
|
Date: Sat, 23 Jun 2018 22:49:04 +0200
|
|
Subject: [PATCH] kconfig: loop boundary condition fix
|
|
|
|
If buf[-1] just happens to hold the byte 0x0A, then nread can wrap around
|
|
to (size_t)-1, leading to invalid memory accesses.
|
|
|
|
This has caused segmentation faults when trying to build the latest
|
|
kernel snapshots for i686 in Fedora:
|
|
https://bugzilla.redhat.com/show_bug.cgi?id=1592374
|
|
|
|
Signed-off-by: Jerry James <loganjerry@gmail.com>
|
|
[alexpl@fedoraproject.org: reformatted patch for submission]
|
|
Signed-off-by: Alexander Ploumistos <alexpl@fedoraproject.org>
|
|
---
|
|
scripts/kconfig/preprocess.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
diff --git a/scripts/kconfig/preprocess.c b/scripts/kconfig/preprocess.c
|
|
index 65da87fce907..5ca2df790d3c 100644
|
|
--- a/scripts/kconfig/preprocess.c
|
|
+++ b/scripts/kconfig/preprocess.c
|
|
@@ -156,7 +156,7 @@ static char *do_shell(int argc, char *argv[])
|
|
nread--;
|
|
|
|
/* remove trailing new lines */
|
|
- while (buf[nread - 1] == '\n')
|
|
+ while (nread > 0 && buf[nread - 1] == '\n')
|
|
nread--;
|
|
|
|
buf[nread] = 0;
|
|
--
|
|
2.17.1
|
|
|