aboutsummaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/rcutorture/bin/kvm-build.sh
diff options
context:
space:
mode:
authorPeter Zijlstra <peterz@infradead.org>2019-04-24 09:19:25 +0200
committerIngo Molnar <mingo@kernel.org>2019-04-24 12:19:45 +0200
commit29da93fea3ea39ab9b12270cc6be1b70ef201c9e (patch)
tree1d5dd50a2abb3145a22d6a398cafad8f9067de90 /tools/testing/selftests/rcutorture/bin/kvm-build.sh
parentx86/uaccess: Dont leak the AC flag into __put_user() argument evaluation (diff)
downloadlinux-dev-29da93fea3ea39ab9b12270cc6be1b70ef201c9e.tar.xz
linux-dev-29da93fea3ea39ab9b12270cc6be1b70ef201c9e.zip
mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions
Randy reported objtool triggered on his (GCC-7.4) build: lib/strncpy_from_user.o: warning: objtool: strncpy_from_user()+0x315: call to __ubsan_handle_add_overflow() with UACCESS enabled lib/strnlen_user.o: warning: objtool: strnlen_user()+0x337: call to __ubsan_handle_sub_overflow() with UACCESS enabled This is due to UBSAN generating signed-overflow-UB warnings where it should not. Prior to GCC-8 UBSAN ignored -fwrapv (which the kernel uses through -fno-strict-overflow). Make the functions use 'unsigned long' throughout. Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: luto@kernel.org Link: http://lkml.kernel.org/r/20190424072208.754094071@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/testing/selftests/rcutorture/bin/kvm-build.sh')
0 files changed, 0 insertions, 0 deletions