x86/doublefault/32: Fix stack canaries in the double fault handler

The double fault TSS was missing GS setup, which is needed for stack
canaries to work.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
This commit is contained in:
Andy Lutomirski 2019-11-21 11:50:12 +01:00 committed by Peter Zijlstra
parent 922eea2ce5
commit 3580d0b29c
1 changed files with 3 additions and 0 deletions

View File

@ -65,6 +65,9 @@ struct x86_hw_tss doublefault_tss __cacheline_aligned = {
.ss = __KERNEL_DS,
.ds = __USER_DS,
.fs = __KERNEL_PERCPU,
#ifndef CONFIG_X86_32_LAZY_GS
.gs = __KERNEL_STACK_CANARY,
#endif
.__cr3 = __pa_nodebug(swapper_pg_dir),
};