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authorAndy Lutomirski <luto@kernel.org>2020-03-12 15:35:51 -0700
committerBorislav Petkov <bp@suse.de>2020-03-20 11:28:47 +0100
commit630b99ab60aa972052a4202a1ff96c7e45eb0054 (patch)
tree0ad144a21cf62829ae39c29d741258bfc4d14977
parent07f24dc95daca49b8a2e804edc024dd4e91610ac (diff)
selftests/x86/ptrace_syscall_32: Fix no-vDSO segfault
If AT_SYSINFO is not present, don't try to call a NULL pointer. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/faaf688265a7e1a5b944d6f8bc0f6368158306d3.1584052409.git.luto@kernel.org
-rw-r--r--tools/testing/selftests/x86/ptrace_syscall.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c
index 6f22238f3217..12aaa063196e 100644
--- a/tools/testing/selftests/x86/ptrace_syscall.c
+++ b/tools/testing/selftests/x86/ptrace_syscall.c
@@ -414,8 +414,12 @@ int main()
#if defined(__i386__) && (!defined(__GLIBC__) || __GLIBC__ > 2 || __GLIBC_MINOR__ >= 16)
vsyscall32 = (void *)getauxval(AT_SYSINFO);
- printf("[RUN]\tCheck AT_SYSINFO return regs\n");
- test_sys32_regs(do_full_vsyscall32);
+ if (vsyscall32) {
+ printf("[RUN]\tCheck AT_SYSINFO return regs\n");
+ test_sys32_regs(do_full_vsyscall32);
+ } else {
+ printf("[SKIP]\tAT_SYSINFO is not available\n");
+ }
#endif
test_ptrace_syscall_restart();