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linux/arch/x86
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Peter Zijlstra e5796ff9ac x86/nospec: Fix i386 RSB stuffing 
commit 3329249737 upstream.

Turns out that i386 doesn't unconditionally have LFENCE, as such the
loop in __FILL_RETURN_BUFFER isn't actually speculation safe on such
chips.

Fixes: ba6e31af2b ("x86/speculation: Add LFENCE to RSB fill sequence")
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/Yv9tj9vbQ9nNlXoY@worktop.programming.kicks-ass.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-05 10:28:54 +02:00
..
boot
x86: link vdso and boot with -z noexecstack --no-warn-rwx-segments
2022-08-21 15:15:18 +02:00
configs
x86/kbuild: Enable CONFIG_KALLSYMS_ALL=y in the defconfigs
2022-01-27 10:54:21 +01:00
crypto
crypto: x86/poly1305 - Fixup SLS
2022-07-25 11:26:32 +02:00
entry
x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y
2022-08-21 15:16:13 +02:00
events
perf/x86/intel/uncore: Fix broken read_counter() for SNB IMC PMU
2022-08-31 17:15:24 +02:00
hyperv
x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails
2021-11-26 10:39:19 +01:00
ia32
x86: remove address space overrides using set_fs()
2020-09-08 22:21:36 -04:00
include
x86/nospec: Fix i386 RSB stuffing
2022-09-05 10:28:54 +02:00
kernel
x86/bugs: Add "unknown" reporting for MMIO Stale Data
2022-08-31 17:15:22 +02:00
kvm
kvm: x86/pmu: Fix the compare function used by the pmu event filter
2022-08-21 15:16:26 +02:00
lib
x86/retbleed: Add fine grained Kconfig knobs
2022-07-25 11:26:50 +02:00
math-emu
x86: Prepare asm files for straight-line-speculation
2022-07-25 11:26:28 +02:00
mm
x86/mm: Use proper mask when setting PUD mapping
2022-08-25 11:37:49 +02:00
net
x86/bpf: Use alternative RET encoding
2022-07-25 11:26:38 +02:00
oprofile
…
pci
x86/pci/xen: Disable PCI/MSI[-X] masking for XEN_HVM guests
2022-05-09 09:05:00 +02:00
platform
x86/olpc: fix 'logical not is only applied to the left hand side'
2022-08-21 15:16:14 +02:00
power
x86: Prepare asm files for straight-line-speculation
2022-07-25 11:26:28 +02:00
purgatory
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
ras
…
realmode
x86/mm: Flush global TLB when switching to trampoline page-table
2022-01-27 10:54:14 +01:00
tools
x86/tools: Fix objdump version check again
2021-08-18 08:59:15 +02:00
um
x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y
2022-08-21 15:16:13 +02:00
video
…
xen
x86/xen: Fix initialisation in hypercall_page after rethunk
2022-07-25 11:26:52 +02:00
.gitignore
…
Kbuild
…
Kconfig
x86/speculation: Make all RETbleed mitigations 64-bit only
2022-08-11 13:06:44 +02:00
Kconfig.assembler
…
Kconfig.cpu
…
Kconfig.debug
x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()
2020-10-06 11:18:04 +02:00
Makefile
x86/realmode: build with -D__DISABLE_EXPORTS
2022-07-25 11:26:33 +02:00
Makefile_32.cpu
…
Makefile.um
…