selftests/x86/ptrace_syscall_32: Fix no-vDSO segfault
[ Upstream commit 630b99ab60
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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
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -414,8 +414,12 @@ int main()
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#if defined(__i386__) && (!defined(__GLIBC__) || __GLIBC__ > 2 || __GLIBC_MINOR__ >= 16)
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vsyscall32 = (void *)getauxval(AT_SYSINFO);
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if (vsyscall32) {
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printf("[RUN]\tCheck AT_SYSINFO return regs\n");
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test_sys32_regs(do_full_vsyscall32);
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} else {
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printf("[SKIP]\tAT_SYSINFO is not available\n");
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}
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#endif
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test_ptrace_syscall_restart();
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