x86/mm/pkeys: Fix fill_sig_info_pkey
SEGV_PKUERR is a signal specific si_code which happens to have the same numeric value as several others: BUS_MCEERR_AR, ILL_ILLTRP, FPE_FLTOVF, TRAP_HWBKPT, CLD_TRAPPED, POLL_ERR, SEGV_THREAD_ID, as such it is not safe to just test the si_code the signal number must also be tested to prevent a false positive in fill_sig_info_pkey. I found this error by inspection, and BUS_MCEERR_AR appears to be a real candidate for confusion. So pass in si_signo and fix it. Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Fixes: 019132ff ("x86/mm/pkeys: Fill in pkey field in siginfo") Signed-off-by:"Eric W. Biederman" <ebiederm@xmission.com>
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