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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-24 20:12:17 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-24 20:12:17 +0200 |
| commit | 1b7eaf570140281a1aa898a875aa587d48d96958 (patch) | |
| tree | fd5f02656e9975bd5cfe5a2288d4ae034030cf6a /drivers | |
| parent | Merge tag 'ceph-for-5.15-rc3' of git://github.com/ceph/ceph-client (diff) | |
| parent | arm64: Restore forced disabling of KPTI on ThunderX (diff) | |
| download | linux-1b7eaf570140281a1aa898a875aa587d48d96958.tar.xz linux-1b7eaf570140281a1aa898a875aa587d48d96958.zip | |
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- 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.
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Restore forced disabling of KPTI on ThunderX
kselftest/arm64: signal: Skip tests if required features are missing
arm64: Mitigate MTE issues with str{n}cmp()
arm64: add MTE supported check to thread switching and syscall entry/exit
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions