5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michal Kubecek <mkubecek@xxxxxxx>
commit c93db682cfb213501881072a9200a48ce1dc3c3f upstream.
Commit 3fb0fdb3bbe7 ("x86/stackprotector/32: Make the canary into a regular
percpu variable") modified the stackprotector check on 32-bit x86 to check
if gcc supports using %fs as canary. Adjust dummy-tools gcc script to pass
this new test by returning "%fs" rather than "%gs" if it detects
-mstack-protector-guard-reg=fs on command line.
Fixes: 3fb0fdb3bbe7 ("x86/stackprotector/32: Make the canary into a regular percpu variable")
Signed-off-by: Michal Kubecek <mkubecek@xxxxxxx>
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
scripts/dummy-tools/gcc | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/scripts/dummy-tools/gcc
+++ b/scripts/dummy-tools/gcc
@@ -76,7 +76,11 @@ fi
if arg_contain -S "$@"; then
# For scripts/gcc-x86-*-has-stack-protector.sh
if arg_contain -fstack-protector "$@"; then
- echo "%gs"
+ if arg_contain -mstack-protector-guard-reg=fs "$@"; then
+ echo "%fs"
+ else
+ echo "%gs"
+ fi
exit 0
fi
fi
