From 2c637d2df4ee4830e9d3eb2bd5412250522ce96e Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Fri, 11 Sep 2020 10:29:15 +0000 Subject: powerpc/powermac: Fix low_sleep_handler with KUAP and KUEP low_sleep_handler() has an hardcoded restore of segment registers that doesn't take KUAP and KUEP into account. Use head_32's load_segment_registers() routine instead. Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access Protection") Fixes: 31ed2b13c48d ("powerpc/32s: Implement Kernel Userspace Execution Prevention.") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/21b05f7298c1b18f73e6e5b4cd5005aafa24b6da.1599820109.git.christophe.leroy@csgroup.eu --- arch/powerpc/kernel/head_32.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/powerpc/kernel/head_32.S') diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index b0e184f795c0..2bd0aa3a4cc7 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -996,7 +996,7 @@ BEGIN_MMU_FTR_SECTION END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS) blr -load_segment_registers: +_GLOBAL(load_segment_registers) li r0, NUM_USER_SEGMENTS /* load up user segment register values */ mtctr r0 /* for context 0 */ li r3, 0 /* Kp = 0, Ks = 0, VSID = 0 */ -- cgit v1.2.3