[PATCH v3 3/7] arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return

[Sasha Levin]

Hi

[This is an automated email]

This commit has been processed because it contains a -stable tag.
The stable tag indicates that it's relevant for the following trees: all

The bot has tested the following trees: v5.7.8, v5.4.51, v4.19.132, v4.14.188, v4.9.230, v4.4.230.

v5.7.8: Build OK!
v5.4.51: Build OK!
v4.19.132: Build OK!
v4.14.188: Failed to apply! Possible dependencies:
    0013aceb30748 ("xtensa: clean up fixups in assembly code")
    1af1e8a39dc0f ("xtensa: move fixmap and kmap just above the KSEG")
    2a61f4747eeaa ("stack-protector: test compiler capability in Kconfig and drop AUTO mode")
    2b8383927525d ("Makefile: move stack-protector compiler breakage test earlier")
    2bc2f688fdf88 ("Makefile: move stack-protector availability out of Kconfig")
    409d5db49867c ("arm64: rseq: Implement backend rseq calls and select HAVE_RSEQ")
    40d1a07b333ef ("xtensa: enable stack protector")
    4141c857fd09d ("arm64: convert raw syscall invocation to C")
    44c6dc940b190 ("Makefile: introduce CONFIG_CC_STACKPROTECTOR_AUTO")
    5cf97ebd8b40e ("xtensa: clean up functions in assembly code")
    8d66772e869e7 ("arm64: Mask all exceptions during kernel_exit")
    9800b9dc13cdf ("arm: Add restartable sequences support")
    c2edb35ae342f ("xtensa: extract init_kio")
    c633544a61541 ("xtensa: add support for KASAN")
    d148eac0e70f0 ("Kbuild: rename HAVE_CC_STACKPROTECTOR config variable")
    f4431396be5b2 ("xtensa: consolidate kernel stack size related definitions")

v4.9.230: Failed to apply! Possible dependencies:
    12597988319c8 ("MIPS: Sort MIPS Kconfig Alphabetically.")
    2a61f4747eeaa ("stack-protector: test compiler capability in Kconfig and drop AUTO mode")
    2b8383927525d ("Makefile: move stack-protector compiler breakage test earlier")
    2bc2f688fdf88 ("Makefile: move stack-protector availability out of Kconfig")
    313dd1b629219 ("gcc-plugins: Add the randstruct plugin")
    39c13c204bb11 ("arm: eBPF JIT compiler")
    409d5db49867c ("arm64: rseq: Implement backend rseq calls and select HAVE_RSEQ")
    4141c857fd09d ("arm64: convert raw syscall invocation to C")
    44c6dc940b190 ("Makefile: introduce CONFIG_CC_STACKPROTECTOR_AUTO")
    74d86a70636a0 ("arm: use set_memory.h header")
    8d66772e869e7 ("arm64: Mask all exceptions during kernel_exit")
    9800b9dc13cdf ("arm: Add restartable sequences support")
    c02433dd6de32 ("arm64: split thread_info from task stack")
    c61f13eaa1ee1 ("gcc-plugins: Add structleak for more stack initialization")
    c763ea2650dfa ("x86/kconfig: Sort the 'config X86' selects alphabetically")
    d148eac0e70f0 ("Kbuild: rename HAVE_CC_STACKPROTECTOR config variable")
    f381bf6d82f03 ("MIPS: Add support for eBPF JIT.")

v4.4.230: Failed to apply! Possible dependencies:
    218cfe4ed8885 ("perf/x86: Move perf_event_amd_ibs.c ....... => x86/events/amd/ibs.c")
    25a77b55e74c4 ("xtensa/perf: Convert the hotplug notifier to state machine callbacks")
    2a803c4db615d ("arm64: head.S: use memset to clear BSS")
    2bf31a4a05f5b ("arm64: avoid dynamic relocations in early boot code")
    3600c2fdc09a4 ("arm64: Add macros to read/write system registers")
    39b0332a21583 ("perf/x86: Move perf_event_amd.c ........... => x86/events/amd/core.c")
    4141c857fd09d ("arm64: convert raw syscall invocation to C")
    499c81507f599 ("arm64/debug: Remove superfluous SMP function call")
    49de0493e5f67 ("x86/perf/intel/cstate: Make cstate hotplug handling actually work")
    4b6e2571bf000 ("x86/perf/intel/rapl: Make the Intel RAPL PMU driver modular")
    5b26547dd7faa ("perf/x86: Move perf_event_amd_iommu.[ch] .. => x86/events/amd/iommu.[ch]")
    609116d202a8c ("arm64: add function to install the idmap")
    6cdf9c7ca687e ("arm64: Store struct thread_info in sp_el0")
    77c34ef1c3194 ("perf/x86/intel/cstate: Convert Intel CSTATE to hotplug state machine")
    8d66772e869e7 ("arm64: Mask all exceptions during kernel_exit")
    9e8e865bbe294 ("arm64: unify idmap removal")
    a563f7598198b ("arm64: Reuse TCR field definitions for EL1 and EL2")
    adf7589997927 ("arm64: simplify sysreg manipulation")
    ae7e27fe6834d ("arm64: hw_breakpoint: Allow EL2 breakpoints if running in HYP")
    bb9052744f4b7 ("arm64: Handle early CPU boot failures")
    c02433dd6de32 ("arm64: split thread_info from task stack")
    c4bc34d20273d ("arm64: Add a helper for parking CPUs in a loop")
    c7afba320e91c ("x86/perf/intel/cstate: Modularize driver")
    e5b61bafe7047 ("arm: Convert VFP hotplug notifiers to state machine")
    e633c65a1d585 ("x86/perf/intel/uncore: Make the Intel uncore PMU driver modular")
    e937dd5782688 ("arm64: debug: convert OS lock CPU hotplug notifier to new infrastructure")
    ee02a15919cf8 ("arm64: Introduce cpu_die_early")
    fa9cbf320e996 ("perf/x86: Move perf_event.c ............... => x86/events/core.c")
    fce6361fe9b0c ("arm64: Move cpu_die_early to smp.c")


NOTE: The patch will not be queued to stable trees until it is upstream.

How should we proceed with this patch?

-- 
Thanks
Sasha