| Message ID | YU4NqD1xVANVj0y0@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [GIT,PULL] arm64 fixes for 5.15-rc3 | expand |
The pull request you sent on Fri, 24 Sep 2021 18:40:56 +0100:
> git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux tags/arm64-fixes
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/1b7eaf570140281a1aa898a875aa587d48d96958
Thank you!
Hi Linus, Please pull the arm64 fixes below. Thanks. The following changes since commit 9fcb2e93f41c07a400885325e7dbdfceba6efaec: arm64: Mark __stack_chk_guard as __ro_after_init (2021-09-16 17:59:17 +0100) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux tags/arm64-fixes for you to fetch changes up to 22b70e6f2da0a4c8b1421b00cfc3016bc9d4d9d4: arm64: Restore forced disabling of KPTI on ThunderX (2021-09-23 15:59:15 +0100) ---------------------------------------------------------------- arm64 fixes: - It turns out that the optimised string routines merged in 5.14 are not safe with in-kernel MTE (KASAN_HW_TAGS) because of reading beyond the end of a string (strcmp, strncmp). Such reading may go across a 16 byte tag granule and cause a tag check fault. When KASAN_HW_TAGS is enabled, use the generic strcmp/strncmp C implementation. - An errata workaround for ThunderX relied on the CPU capabilities being enabled in a specific order. This disappeared with the automatic generation of the cpucaps.h file (sorted alphabetically). Fix it by checking the current CPU only rather than the system-wide capability. - Add system_supports_mte() checks on the kernel entry/exit path and thread switching to avoid unnecessary barriers and function calls on systems where MTE is not supported. - kselftests: skip arm64 tests if the required features are missing. ---------------------------------------------------------------- Cristian Marussi (1): kselftest/arm64: signal: Skip tests if required features are missing Peter Collingbourne (1): arm64: add MTE supported check to thread switching and syscall entry/exit Robin Murphy (1): arm64: Mitigate MTE issues with str{n}cmp() dann frazier (1): arm64: Restore forced disabling of KPTI on ThunderX arch/arm64/include/asm/assembler.h | 5 +++++ arch/arm64/include/asm/mte.h | 6 ++++++ arch/arm64/include/asm/string.h | 2 ++ arch/arm64/kernel/cpufeature.c | 8 ++++++-- arch/arm64/kernel/mte.c | 10 ++++------ arch/arm64/lib/strcmp.S | 2 +- arch/arm64/lib/strncmp.S | 2 +- tools/testing/selftests/arm64/signal/test_signals_utils.c | 7 +++++-- 8 files changed, 30 insertions(+), 12 deletions(-)