HWPOISON: Copy si_addr_lsb to user (a337fdac) · Commits · 戴 / test

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:

Andi Kleen <ak@linux.intel.com>

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:

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