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Commit a337fdac authored by Andi Kleen's avatar Andi Kleen
Browse files

HWPOISON: Copy si_addr_lsb to user 



The original hwpoison code added a new siginfo field si_addr_lsb to
pass the granuality of the fault address to user space. Unfortunately
this field was never copied to user space. Fix this here.

I added explicit checks for the MCEERR codes to avoid having
to patch all potential callers to initialize the field.

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
parent 67159813

kernel/signal.c

+8 −0
Original line number Diff line number Diff line
@@ -2214,6 +2214,14 @@ int copy_siginfo_to_user(siginfo_t __user *to, siginfo_t *from) 
		err |= __put_user(from->si_addr, &to->si_addr);

#ifdef __ARCH_SI_TRAPNO

		err |= __put_user(from->si_trapno, &to->si_trapno);

#endif

#ifdef BUS_MCEERR_AO

		/* 

		 * Other callers might not initialize the si_lsb field,

	 	 * so check explicitely for the right codes here.

		 */

		if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO)

			err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);

#endif

		break;

	case __SI_CHLD: