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Kees Cook 2bbe7ac11b gcc-plugins/stackleak: Use noinstr in favor of notrace 
[ Upstream commit dcb85f85fa ]

While the stackleak plugin was already using notrace, objtool is now a
bit more picky.  Update the notrace uses to noinstr.  Silences the
following objtool warnings when building with:

CONFIG_DEBUG_ENTRY=y
CONFIG_STACK_VALIDATION=y
CONFIG_VMLINUX_VALIDATION=y
CONFIG_GCC_PLUGIN_STACKLEAK=y

  vmlinux.o: warning: objtool: do_syscall_64()+0x9: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: do_int80_syscall_32()+0x9: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: exc_general_protection()+0x22: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: fixup_bad_iret()+0x20: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: do_machine_check()+0x27: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .text+0x5346e: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x143: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x10eb: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x17f9: call to stackleak_erase() leaves .noinstr.text section

Note that the plugin's addition of calls to stackleak_track_stack() from
noinstr functions is expected to be safe, as it isn't runtime
instrumentation and is self-contained.

Cc: Alexander Popov <alex.popov@linux.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-04-19 17:45:26 +08:00
arch x86/Xen: streamline (and fix) PV CPU enumeration 2023-04-19 17:45:26 +08:00
block block: bio-integrity: Advance seed correctly for larger interval sizes 2023-04-19 17:45:03 +08:00
certs certs: Add support for using elliptic curve keys for signing modules 2021-08-23 19:55:42 +03:00
crypto crypto: api - Move cryptomgr soft dependency into algapi 2023-04-19 17:45:10 +08:00
Documentation ARM: dts: Fix timer regression for beagleboard revision c 2023-04-19 17:45:16 +08:00
drivers drm/amdgpu: fix logic inversion in check 2023-04-19 17:45:26 +08:00
fs quota: make dquot_quota_sync return errors from ->sync_fs 2023-04-19 17:45:25 +08:00
include Revert "module, async: async_synchronize_full() on module init iff async is used" 2023-04-19 17:45:26 +08:00
init init: make unknown command line param message clearer 2023-04-19 16:57:51 +08:00
ipc ipc/sem: do not sleep with a spin lock held 2023-04-19 17:45:01 +08:00
kernel gcc-plugins/stackleak: Use noinstr in favor of notrace 2023-04-19 17:45:26 +08:00
lib lib/test_meminit: destroy cache in kmem_cache_alloc_bulk() test 2023-04-19 17:44:45 +08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm: don't try to NUMA-migrate COW pages that have other uses 2023-04-19 17:45:23 +08:00
net ax25: improve the incomplete fix to avoid UAF and NPD bugs 2023-04-19 17:45:25 +08:00
samples samples: bpf: Fix 'unknown warning group' build warning on Clang 2023-04-19 17:43:59 +08:00
scripts Makefile.extrawarn: Move -Wunaligned-access to W=1 2023-04-19 17:45:22 +08:00
security ima: Do not print policy rule with inactive LSM labels 2023-04-19 17:45:10 +08:00
sound ASoC: codecs: wcd938x: fix return value of mixer put function 2023-04-19 17:45:07 +08:00
tools kselftest: Fix vdso_test_abi return status 2023-04-19 17:45:25 +08:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2023-04-19 17:44:58 +08:00
virt KVM: eventfd: Fix false positive RCU usage warning 2023-04-19 17:45:14 +08:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: Add entry for RISC-V PMU drivers 2023-01-03 14:26:18 +08:00
Makefile Linux 5.15.24 2023-04-19 17:45:22 +08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.