Lai Jiangshan 92f309c838 x86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry() ... [ Upstream commit c07e45553da1808aa802e9f0ffa8108cfeaf7a17 ] Commit 18ec54fdd6 ("x86/speculation: Prepare entry code for Spectre v1 swapgs mitigations") added FENCE_SWAPGS_{KERNEL|USER}_ENTRY for conditional SWAPGS. In paranoid_entry(), it uses only FENCE_SWAPGS_KERNEL_ENTRY for both branches. This is because the fence is required for both cases since the CR3 write is conditional even when PTI is enabled. But 96b2371413 ("x86/entry/64: Switch CR3 before SWAPGS in paranoid entry") changed the order of SWAPGS and the CR3 write. And it missed the needed FENCE_SWAPGS_KERNEL_ENTRY for the user gsbase case. Add it back by changing the branches so that FENCE_SWAPGS_KERNEL_ENTRY can cover both branches. [ bp: Massage, fix typos, remove obsolete comment while at it. ] Fixes: 96b2371413 ("x86/entry/64: Switch CR3 before SWAPGS in paranoid entry") Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20211126101209.8613-2-jiangshanlai@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-12-08 09:03:27 +01:00
..
syscalls	A couple of x86 fixes which missed rc1 due to my stupidity:	2020-10-27 14:39:29 -07:00
vdso	Kbuild updates for v5.10	2020-10-22 13:13:57 -07:00
vsyscall	…
Makefile	…
calling.h	…
common.c	x86/entry: Fix noinstr fail in __do_fast_syscall_32()	2021-06-30 08:47:17 -04:00
entry_32.S	…
entry_64.S	x86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry()	2021-12-08 09:03:27 +01:00
entry_64_compat.S	x86/sev-es: Introduce ip_within_syscall_gap() helper	2021-03-17 17:06:35 +01:00
syscall_32.c	…
syscall_64.c	…
syscall_x32.c	…
thunk_32.S	…
thunk_64.S	x86/entry: Emit a symbol for register restoring thunk	2021-02-03 23:28:40 +01:00