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5b835d4cad
linux/arch/xtensa/include/asm
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Max Filippov 5b835d4cad xtensa: use XCHAL_NUM_AREGS as pt_regs::areg size 
struct pt_regs is used to access both kernel and user exception frames.
User exception frames may contain up to XCHAL_NUM_AREG registers that
task creation and signal delivery code may access, but pt_regs::areg
array has only 16 entries that cover only the kernel exception frame.
This results in the following build error:

arch/xtensa/kernel/process.c: In function 'copy_thread':
arch/xtensa/kernel/process.c:262:52: error: array subscript 53 is above
           array bounds of 'long unsigned int[16]' [-Werror=array-bounds]
  262 |                                 put_user(regs->areg[caller_ars+1],

Change struct pt_regs::areg size to XCHAL_NUM_AREGS so that it covers
the whole user exception frame. Adjust task_pt_regs and drop additional
register copying code from copy_thread now that the whole user exception
stack frame is copied.

Reported-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
2022-03-07 12:02:54 -08:00
..
asm-offsets.h
asm-uaccess.h get rid of legacy 'get_ds()' function 2019-03-04 10:50:14 -08:00
asmmacro.h xtensa: definitions for call0 ABI 2021-10-18 22:19:34 -07:00
atomic.h xtensa: use a14 instead of a15 in inline assembly 2021-10-18 22:19:34 -07:00
barrier.h xtensa: add exclusive atomics support 2019-05-07 10:36:31 -07:00
bitops.h include: move find.h from asm_generic to linux 2022-01-15 08:47:31 -08:00
bootparam.h
bugs.h
cache.h xtensa: add XIP kernel support 2019-11-26 11:33:38 -08:00
cacheasm.h xtensa: increase ranges in ___invalidate_{i,d}cache_all 2018-08-13 20:08:01 -07:00
cacheflush.h Add linux/cacheflush.h 2021-11-17 10:36:15 -05:00
checksum.h xtensa: propagate the calling conventions change down into csum_partial_copy_generic() 2020-08-20 15:45:21 -04:00
cmpxchg.h xtensa: use a14 instead of a15 in inline assembly 2021-10-18 22:19:34 -07:00
coprocessor.h xtensa: replace variant/core.h with asm/core.h 2019-05-06 17:48:55 -07:00
core.h xtensa: definitions for call0 ABI 2021-10-18 22:19:34 -07:00
current.h xtensa: consolidate kernel stack size related definitions 2017-12-10 14:48:55 -08:00
delay.h
dma.h
elf.h xtensa: enable CORE_DUMP_USE_REGSET 2018-12-17 13:48:22 -08:00
fixmap.h xtensa/mm/highmem: Make generic kmap_atomic() work correctly 2020-11-16 21:19:24 +01:00
flat.h binfmt_flat: remove the persistent argument from flat_get_addr_from_rp 2019-06-24 09:16:47 +10:00
ftrace.h
futex.h futex: Fix additional regressions 2021-12-11 23:31:51 +01:00
highmem.h xtensa/mm/highmem: Make generic kmap_atomic() work correctly 2020-11-16 21:19:24 +01:00
hw_breakpoint.h perf/hw_breakpoint: Remove default hw_breakpoint_arch_parse() 2018-06-26 09:07:58 +02:00
initialize_mmu.h xtensa: drop extraneous register load from initialize_mmu 2021-04-04 15:39:04 -07:00
io.h arch: rely on asm-generic/io.h for default ioremap_* definitions 2019-11-11 21:18:19 +01:00
irq.h xtensa: replace variant/core.h with asm/core.h 2019-05-06 17:48:55 -07:00
irqflags.h xtensa: replace CONFIG_DEBUG_KERNEL with CONFIG_DEBUG_MISC 2019-05-14 19:52:50 -07:00
jump_label.h xtensa: implement jump_label support 2018-12-20 14:44:38 -08:00
kasan.h xtensa: fix build with KASAN 2018-02-11 09:18:12 -08:00
Kbuild local64.h: make <asm/local64.h> mandatory 2020-12-29 15:36:49 -08:00
kmem_layout.h xtensa: use CONFIG_USE_OF instead of CONFIG_OF 2021-09-27 06:08:58 -07:00
linkage.h xtensa: clean up functions in assembly code 2017-12-10 14:48:54 -08:00
mmu_context.h xtensa: use asm-generic/mmu_context.h for no-op implementations 2020-10-27 16:02:39 +01:00
mmu.h
mxregs.h
nommu_context.h xtensa: use asm-generic/mmu_context.h for no-op implementations 2020-10-27 16:02:39 +01:00
page.h arch, mm: remove stale mentions of DISCONIGMEM 2021-06-29 10:53:55 -07:00
pci-bridge.h xtensa: Remove unused early_read_config_byte() et al declarations 2022-03-06 20:17:09 -08:00
pci.h xtensa: drop ifdef __KERNEL__ from kernel-only headers 2019-05-06 17:48:54 -07:00
perf_event.h
pgalloc.h mm/thp: define default pmd_pgtable() 2021-07-01 11:06:03 -07:00
pgtable.h mm: define default value for FIRST_USER_ADDRESS 2021-07-01 11:06:02 -07:00
platform.h xtensa: clean up platform headers 2020-01-31 12:17:25 -08:00
processor.h Xtensa updates for v5.16 2021-11-06 14:54:03 -07:00
ptrace.h xtensa: use XCHAL_NUM_AREGS as pt_regs::areg size 2022-03-07 12:02:54 -08:00
regs.h xtensa: clean up PS_WOE_BIT usage 2019-09-01 13:11:57 -07:00
seccomp.h xtensa: Enable seccomp architecture tracking 2020-11-20 11:16:35 -08:00
sections.h xtensa: move section symbols to asm/sections.h 2021-10-18 22:19:35 -07:00
serial.h
shmparam.h
signal.h
smp.h
spinlock_types.h locking: Allow to include asm/spinlock_types.h from linux/spinlock_types_raw.h 2021-12-07 15:14:12 +01:00
spinlock.h locking/arch: Move qrwlock.h include after qspinlock.h 2021-02-11 07:59:54 -05:00
stackprotector.h xtensa: enable stack protector 2017-12-16 22:37:07 -08:00
stacktrace.h xtensa: move oprofile stack tracing to stacktrace.c 2015-08-17 07:32:49 +03:00
string.h xtensa: shut up gcc-8 warnings 2018-01-02 03:25:41 -08:00
switch_to.h
syscall.h arch: remove unused function syscall_set_arguments() 2021-09-14 16:06:20 +02:00
sysmem.h xtensa: drop sysmem and switch to memblock 2016-07-24 06:34:00 +03:00
thread_info.h xtensa: add support for TIF_NOTIFY_SIGNAL 2020-11-12 08:45:56 -07:00
timex.h xtensa: clean up WSR*/RSR*/get_sr/set_sr 2018-12-04 14:08:11 -08:00
tlb.h arch/tlb: Clean up simple architectures 2019-04-03 10:32:54 +02:00
tlbflush.h mm: update legacy flush_tlb_* to use vma 2021-06-29 10:53:52 -07:00
traps.h xtensa: only build windowed register support code when needed 2021-10-18 22:19:35 -07:00
uaccess.h asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols 2021-07-30 10:30:21 +02:00
ucontext.h
unistd.h arch: handle arches who do not yet define clone3 2019-06-21 01:54:53 +02:00
vectors.h xtensa: reorganize vectors placement 2020-02-04 21:57:02 -08:00
vermagic.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00