Steven Rostedt (Google) a970174d7a x86/mm: Do not verify W^X at boot up ... Adding on the kernel command line "ftrace=function" triggered: CPA detected W^X violation: 8000000000000063 -> 0000000000000063 range: 0xffffffffc0013000 - 0xffffffffc0013fff PFN 10031b WARNING: CPU: 0 PID: 0 at arch/x86/mm/pat/set_memory.c:609 verify_rwx+0x61/0x6d Call Trace: __change_page_attr_set_clr+0x146/0x8a6 change_page_attr_set_clr+0x135/0x268 change_page_attr_clear.constprop.0+0x16/0x1c set_memory_x+0x2c/0x32 arch_ftrace_update_trampoline+0x218/0x2db ftrace_update_trampoline+0x16/0xa1 __register_ftrace_function+0x93/0xb2 ftrace_startup+0x21/0xf0 register_ftrace_function_nolock+0x26/0x40 register_ftrace_function+0x4e/0x143 function_trace_init+0x7d/0xc3 tracer_init+0x23/0x2c tracing_set_tracer+0x1d5/0x206 register_tracer+0x1c0/0x1e4 init_function_trace+0x90/0x96 early_trace_init+0x25c/0x352 start_kernel+0x424/0x6e4 x86_64_start_reservations+0x24/0x2a x86_64_start_kernel+0x8c/0x95 secondary_startup_64_no_verify+0xe0/0xeb This is because at boot up, kernel text is writable, and there's no reason to do tricks to updated it. But the verifier does not distinguish updates at boot up and at run time, and causes a warning at time of boot. Add a check for system_state == SYSTEM_BOOTING and allow it if that is the case. [ These SYSTEM_BOOTING special cases are all pretty horrid, but the x86 text_poke() code does some odd things at bootup, forcing this for now - Linus ] Link: https://lore.kernel.org/r/20221024112730.180916b3@gandalf.local.home Fixes: 652c5bf380 ("x86/mm: Refuse W^X violations") Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2022-10-24 18:05:27 -07:00
..
boot	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
coco	x86/tdx: Handle load_unaligned_zeropad() page-cross to a shared page	2022-06-17 15:37:33 -07:00
configs	x86/defconfig: Enable CONFIG_DEBUG_WX=y	2022-09-02 10:41:42 +02:00
crypto	This update includes the following changes:	2022-10-10 13:04:25 -07:00
entry	treewide: use prandom_u32_max() when possible, part 1	2022-10-11 17:42:55 -06:00
events	perf/x86/intel/lbr: Use setup_clear_cpu_cap() instead of clear_cpu_cap()	2022-10-20 17:10:28 +02:00
hyperv	x86/hyperv: Replace kmap() with kmap_local_page()	2022-10-03 08:49:48 +00:00
ia32	x86: Remove a.out support	2022-04-11 18:04:27 +02:00
include	iommu/vt-d: Allow NVS regions in arch_rmrr_sanity_check()	2022-10-21 10:49:35 +02:00
kernel	- Fix ORC stack unwinding when GCOV is enabled	2022-10-23 10:07:01 -07:00
kvm	KVM: x86: Add compat handler for KVM_X86_SET_MSR_FILTER	2022-10-22 05:16:04 -04:00
lib	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
math-emu	x86/32: Remove lazy GS macros	2022-04-14 14:09:43 +02:00
mm	x86/mm: Do not verify W^X at boot up	2022-10-24 18:05:27 -07:00
net	bpf: Fix dispatcher patchable function entry to 5 bytes nop	2022-10-20 18:57:51 -07:00
pci	x86/PCI: Revert "x86/PCI: Clip only host bridge windows for E820 regions"	2022-06-17 14:24:14 -05:00
platform	EFI updates for v6.1	2022-10-09 08:56:54 -07:00
power	x86/cpu: Load microcode during restore_processor_state()	2022-04-19 19:37:05 +02:00
purgatory	x86/purgatory: Disable CFI	2022-09-26 10:13:16 -07:00
ras
realmode	x86: kmsan: disable instrumentation of unsupported code	2022-10-03 14:03:24 -07:00
tools	x86/tools/relocs: Ignore __kcfi_typeid_ relocations	2022-09-26 10:13:15 -07:00
um	arch: um: Mark the stack non-executable to fix a binutils warning	2022-09-21 09:11:42 +02:00
video
virt/vmx/tdx	x86/tdx: Provide common base for SEAMCALL and TDCALL C wrappers	2022-04-07 08:27:50 -07:00
xen	xen: branch for v6.1-rc1	2022-10-12 14:39:38 -07:00
.gitignore	x86/purgatory: Omit use of bin2c	2022-07-25 10:32:32 +02:00
Kbuild
Kconfig	x86/Kconfig: Drop check for -mabi=ms for CONFIG_EFI_STUB	2022-10-17 19:11:16 +02:00
Kconfig.assembler
Kconfig.cpu
Kconfig.debug	arch: make TRACE_IRQFLAGS_NMI_SUPPORT generic	2022-06-23 15:39:21 +01:00
Makefile	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Makefile_32.cpu
Makefile.um