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Nicholas Piggin 4a5cb51f3d powerpc/64s/interrupt: Fix check_return_regs_valid() false positive 
The check_return_regs_valid() can cause a false positive if the return
regs are marked as norestart and they are an HSRR type interrupt,
because the low bit in the bottom of regs->trap causes interrupt type
matching to fail.

This can occcur for example on bare metal with a HV privileged doorbell
interrupt that causes a signal, but do_signal returns early because
get_signal() fails, and takes the "No signal to deliver" path. In this
case no signal was delivered so the return location is not changed so
return SRRs are not invalidated, yet set_trap_norestart is called, which
messes up the match. Building go-1.16.6 is known to reproduce this.

Fix it by using the TRAP() accessor which masks out the low bit.

Fixes: 6eaaf9de3599 ("powerpc/64s/interrupt: Check and fix srr_valid without crashing")
Cc: stable@vger.kernel.org # v5.14+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211026122531.3599918-1-npiggin@gmail.com
2021-10-27 22:33:47 +11:00
..
ptrace
powerpc: Add dear as a synonym for pt_regs.dar register
2021-08-26 21:21:07 +10:00
syscalls
compat: remove some compat entry points
2021-09-08 15:32:35 -07:00
trace
powerpc: Don't use 'struct ppc_inst' to reference instruction location
2021-06-17 00:09:00 +10:00
vdso32
powerpc updates for 5.13
2021-04-30 12:22:28 -07:00
vdso64
powerpc/vdso: Don't use r30 to avoid breaking Go lang
2021-07-29 23:13:12 +10:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
align.c
powerpc: warn on emulation of dcbz instruction in kernel mode
2021-10-22 15:22:05 +11:00
asm-offsets.c
Merge branch 'fixes' into next
2021-09-03 22:54:12 +10:00
audit.c
Revert "powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC"
2021-10-27 22:30:32 +11:00
btext.c
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
cacheinfo.c
powerpc/smp: Use existing L2 cache_map cpumask to find L3 cache siblings
2021-08-04 10:53:39 +10:00
cacheinfo.h
powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild
2019-06-15 16:52:06 +10:00
compat_audit.c
Revert "powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC"
2021-10-27 22:30:32 +11:00
cpu_setup_6xx.S
powerpc/32: Blacklist functions running with MMU disabled for kprobe
2020-06-02 20:59:11 +10:00
cpu_setup_44x.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cpu_setup_fsl_booke.S
powerpc: Retire e200 core (mpc555x processor)
2020-12-05 21:49:18 +11:00
cpu_setup_pa6t.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333
2019-06-05 17:37:06 +02:00
cpu_setup_power.c
powerpc/perf: MMCR0 control for PMU registers under PMCC=00
2020-12-04 01:01:29 +11:00
cpu_setup_ppc970.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cputable.c
arch: powerpc: Stop building and using oprofile
2021-01-29 10:05:51 +05:30
crash_dump.c
powerpc: Don't use 'struct ppc_inst' to reference instruction location
2021-06-17 00:09:00 +10:00
dawr.c
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
dbell.c
powerpc: handle irq_enter/irq_exit in interrupt handler wrappers
2021-02-09 00:10:49 +11:00
dma-iommu.c
powerpc/dma: Fallback to dma_ops when persistent memory present
2020-11-27 10:33:42 +01:00
dma-mask.c
dma-mapping, powerpc: simplify the arch dma_set_mask override
2019-02-18 22:41:03 +11:00
dma-swiotlb.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
dt_cpu_ftrs.c
arch: powerpc: Stop building and using oprofile
2021-01-29 10:05:51 +05:30
early_32.c
powerpc/fsl_booke/32: implement KASLR infrastructure
2019-11-13 19:27:40 +11:00
eeh_cache.c
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
eeh_driver.c
pci-v5.9-changes
2020-08-07 18:48:15 -07:00
eeh_event.c
powerpc/eeh: Fix build with STACKTRACE=n
2019-09-14 00:01:14 +10:00
eeh_pe.c
powerpc/eeh: Delete eeh_pe->config_addr
2020-10-07 22:34:47 +11:00
eeh_sysfs.c
powerpc/eeh: Pass eeh_dev to eeh_ops->resume_notify()
2020-07-26 23:34:20 +10:00
eeh.c
powerpc/eeh: Fix docstrings in eeh.c
2021-10-13 16:45:33 +11:00
entry_32.S
powerpc/32: indirect function call use bctrl rather than blrl in ret_from_kernel_thread
2021-08-25 13:35:47 +10:00
entry_64.S
powerpc/bug: Provide better flexibility to WARN_ON/__WARN_FLAGS() with asm goto
2021-08-15 13:49:24 +10:00
epapr_hcalls.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
epapr_paravirt.c
powerpc: Don't use 'struct ppc_inst' to reference instruction location
2021-06-17 00:09:00 +10:00
exceptions-64e.S
powerpc/64e: Get dear offset with _DEAR macro
2021-08-26 21:21:07 +10:00
exceptions-64s.S
powerpc/64s: Fix scv implicit soft-mask table for relocated kernels
2021-08-20 22:35:18 +10:00
fadump.c
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
firmware.c
powerpc: fix unbalanced node refcount in check_kvm_guest()
2021-10-09 00:15:59 +11:00
fpu.S
powerpc/32: Remove unneccessary calculations in load_up_{fpu/altivec}
2021-08-18 23:49:55 +10:00
fsl_booke_entry_mapping.S
powerpc/booke: Avoid link stack corruption in several places
2021-08-25 13:35:47 +10:00
head_8xx.S
powerpc: Define swapper_pg_dir[] in C
2021-06-17 00:09:10 +10:00
head_32.h
powerpc/32: Reduce code duplication of system call entry
2021-06-25 00:07:10 +10:00
head_40x.S
powerpc: Define swapper_pg_dir[] in C
2021-06-17 00:09:10 +10:00
head_44x.S
powerpc/booke: Avoid link stack corruption in several places
2021-08-25 13:35:47 +10:00
head_64.S
powerpc/kexec: blacklist functions called in real mode for kprobe
2021-07-26 20:38:51 +10:00
head_book3s_32.S
powerpc/32s: Fix napping restore in data storage interrupt (DSI)
2021-08-07 08:53:59 +10:00
head_booke.h
powerpc/32: Fix critical and debug interrupts on BOOKE
2021-08-07 08:53:59 +10:00
head_fsl_booke.S
powerpc updates for 5.15
2021-09-03 11:22:50 -07:00
hw_breakpoint_constraints.c
powerpc/breakpoint: Cleanup
2021-10-22 15:22:06 +11:00
hw_breakpoint.c
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
idle_6xx.S
powerpc/32: Return directly from power_save_ppc32_restore()
2021-03-29 13:22:10 +11:00
idle_book3e.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
idle_book3s.S
powerpc/64s: power4 nap fixup in C
2021-04-08 21:17:45 +10:00
idle_e500.S
powerpc/32: Return directly from power_save_ppc32_restore()
2021-03-29 13:22:10 +11:00
idle.c
sched/idle: Fix arch_cpu_idle() vs tracing
2020-11-24 16:47:35 +01:00
ima_arch.c
powerpc/ima: Fix secure boot rules in ima arch policy
2020-05-07 17:25:54 +10:00
interrupt_64.S
powerpc/64s: system call scv tabort fix for corrupt irq soft-mask state
2021-09-13 22:34:11 +10:00
interrupt.c
powerpc/64s/interrupt: Fix check_return_regs_valid() false positive
2021-10-27 22:33:47 +11:00
io-workarounds.c
powerpc: Fix reverse map real-mode address lookup with huge vmalloc
2021-05-28 22:54:27 +10:00
io.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
iomap.c
powerpc: inline iomap accessors
2020-12-04 01:01:09 +11:00
iommu.c
powerpc updates for 5.15
2021-09-03 11:22:50 -07:00
irq.c
powerpc/interrupt: Fix OOPS by not calling do_IRQ() from timer_interrupt()
2021-08-12 22:21:57 +10:00
isa-bridge.c
mm/vmalloc: remove unmap_kernel_range
2021-04-30 11:20:40 -07:00
jump_label.c
powerpc: Don't use 'struct ppc_inst' to reference instruction location
2021-06-17 00:09:00 +10:00
kdebugfs.c
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
kgdb.c
powerpc/64s: avoid reloading (H)SRR registers if they are still valid
2021-06-25 00:06:55 +10:00
kprobes-ftrace.c
powerpc/64s: avoid reloading (H)SRR registers if they are still valid
2021-06-25 00:06:55 +10:00
kprobes.c
powerpc/kprobes: Fix kprobe Oops happens in booke
2021-08-09 16:31:54 +10:00
kvm_emul.S
powerpc/kvm: Add ifdefs around template code
2019-09-14 00:04:40 +10:00
kvm.c
powerpc/kvm: Explicitly mark kvm guest code as __init
2019-09-14 00:04:40 +10:00
l2cr_6xx.S
powerpc: Drop SYNC_601() ISYNC_601() and SYNC()
2020-10-08 21:17:13 +11:00
legacy_serial.c
powerpc/legacy_serial: Fix UBSAN: array-index-out-of-bounds
2021-05-12 11:07:39 +10:00
Makefile
Revert "powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC"
2021-10-27 22:30:32 +11:00
mce_power.c
powerpc/powernv: Fix machine check reporting of async store errors
2021-06-21 21:13:19 +10:00
mce.c
powerpc/mce: Fix access error in mce handler
2021-09-13 22:34:12 +10:00
misc_32.S
powerpc: Avoid link stack corruption in misc asm functions
2021-08-25 13:35:47 +10:00
misc_64.S
powerpc: Avoid link stack corruption in misc asm functions
2021-08-25 13:35:47 +10:00
misc.S
powerpc: Avoid link stack corruption in misc asm functions
2021-08-25 13:35:47 +10:00
module_32.c
powerpc/modules: Use PPC_RAW_xx() macros
2021-06-16 00:16:48 +10:00
module_64.c
powerpc/modules: Use PPC_RAW_xx() macros
2021-06-16 00:16:48 +10:00
module.c
powerpc/modules: Make module_alloc() Strict Module RWX aware
2021-06-21 21:13:20 +10:00
msi.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
note.S
powerpc: Add PowerPC Capabilities ELF note
2019-08-30 09:40:15 +10:00
nvram_64.c
printk: introduce a kmsg_dump iterator
2021-03-08 11:43:27 +01:00
of_platform.c
powerpc/eeh: Remove eeh_dev_phb_init_dynamic()
2020-07-26 23:34:19 +10:00
optprobes_head.S
powerpc: Enable OPTPROBES on PPC32
2021-04-21 22:52:32 +10:00
optprobes.c
powerpc/kprobes: Fix Oops by passing ppc_inst as a pointer to emulate_step() on ppc32
2021-06-25 14:46:51 +10:00
paca.c
powerpc/paca: Remove mm_ctx_id and mm_ctx_slb_addr_limit
2021-05-17 15:27:15 +10:00
pci_32.c
powerpc/64: Adjust order in pcibios_init()
2019-08-22 23:11:48 +10:00
pci_64.c
mm/vmalloc: remove unmap_kernel_range
2021-04-30 11:20:40 -07:00
pci_dn.c
powerpc/pci: Move PHB discovery for PCI_DN using platforms
2021-02-09 00:01:05 +11:00
pci_of_scan.c
powerpc/pci: Remove pcibios_setup_bus_devices()
2020-01-06 16:25:29 +11:00
pci-common.c
powerpc/pseries/pci: Add MSI domains
2021-08-10 23:14:57 +10:00
pci-hotplug.c
powerpc/eeh: Release EEH device state synchronously
2020-05-18 21:58:44 +10:00
pmc.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ppc32.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ppc_save_regs.S
powerpc: Improve ppc_save_regs()
2020-04-04 21:40:57 +11:00
proc_powerpc.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
process.c
powerpc: Add dear as a synonym for pt_regs.dar register
2021-08-26 21:21:07 +10:00
prom_init_check.sh
powerpc/prom_init: Undo relocation before entering secure mode
2019-10-29 15:12:17 +11:00
prom_init.c
Kbuild updates for v5.15
2021-09-03 15:33:47 -07:00
prom_parse.c
…
prom.c
Kbuild updates for v5.15
2021-09-03 15:33:47 -07:00
reloc_32.S
powerpc: Avoid link stack corruption in misc asm functions
2021-08-25 13:35:47 +10:00
reloc_64.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtas_flash.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
rtas_pci.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
rtas-proc.c
powerpc/rtas: rename RTAS_RMOBUF_MAX to RTAS_USER_REGION_SIZE
2021-04-14 23:04:16 +10:00
rtas-rtc.c
powerpc/rtas-rtc: remove unused constant
2021-06-25 14:47:20 +10:00
rtas.c
isystem: ship and use stdarg.h
2021-08-19 09:02:55 +09:00
rtasd.c
powerpc: Replace deprecated CPU-hotplug functions.
2021-08-10 23:14:56 +10:00
secure_boot.c
powerpc/pseries: Detect secure and trusted boot state of the system.
2020-07-16 14:49:53 +10:00
security.c
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
secvar-ops.c
powerpc/powernv: Add OPAL API interface to access secure variable
2019-11-13 00:33:22 +11:00
secvar-sysfs.c
powerpc: expose secure variables to userspace via sysfs
2019-11-13 00:33:22 +11:00
setup_32.c
powerpc: Don't use 'struct ppc_inst' to reference instruction location
2021-06-17 00:09:00 +10:00
setup_64.c
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
setup-common.c
powerpc/machdep: Remove stale functions from ppc_md structure
2021-10-22 15:22:05 +11:00
setup.h
powerpc: remove unneeded semicolons
2021-02-09 00:10:50 +11:00
signal_32.c
powerpc/64s: avoid reloading (H)SRR registers if they are still valid
2021-06-25 00:06:55 +10:00
signal_64.c
powerpc/64s: avoid reloading (H)SRR registers if they are still valid
2021-06-25 00:06:55 +10:00
signal.c
powerpc/64s: avoid reloading (H)SRR registers if they are still valid
2021-06-25 00:06:55 +10:00
signal.h
powerpc/signal: Fix possible build failure with unsafe_copy_fpr_{to/from}_user
2021-05-12 11:07:39 +10:00
smp-tbsync.c
…
smp.c
powerpc/numa: Update cpu_cpu_map on CPU online/offline
2021-08-27 00:56:54 +10:00
stacktrace.c
powerpc/stacktrace: Include linux/delay.h
2021-08-03 22:33:37 +10:00
static_call.c
powerpc/32: Add support for out-of-line static calls
2021-10-22 15:22:05 +11:00
suspend.c
PM: hibernate: powerpc: Expose pfn_is_nosave() prototype
2019-06-14 10:48:56 +02:00
swsusp_32.S
powerpc/32: Blacklist functions running with MMU disabled for kprobe
2020-06-02 20:59:11 +10:00
swsusp_64.c
powerpc/machdep: Remove stale functions from ppc_md structure
2021-10-22 15:22:05 +11:00
swsusp_asm64.S
powerpc/machdep: Remove stale functions from ppc_md structure
2021-10-22 15:22:05 +11:00
swsusp_booke.S
…
swsusp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
sys_ppc32.c
powerpc/compat_sys: swap hi/lo parts of 64-bit syscall args in LE mode
2021-02-11 23:35:07 +11:00
syscalls.c
powerpc/syscalls: Simplify do_mmap2()
2021-08-25 13:35:48 +10:00
sysfs.c
powerpc/cpuhp: BUG -> WARN conversion in offline path
2021-10-09 00:16:00 +11:00
systbl_chk.sh
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
systbl.S
powerpc/syscalls: switch to generic syscalltbl.sh
2021-04-14 23:04:16 +10:00
tau_6xx.c
powerpc/tau: Add 'static' storage qualifier to 'tau_work' definition
2021-08-20 17:00:53 +10:00
time.c
powerpc/time: Remove generic_suspend_{dis/en}able_irqs()
2021-10-22 15:22:05 +11:00
tm.S
powerpc/tm: Save and restore AMR on treclaim and trechkpt
2020-10-06 23:22:25 +11:00
traps.c
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
ucall.S
powerpc/kernel: Add ucall_norets() ultravisor call handler
2019-08-30 09:40:15 +10:00
udbg_16550.c
powerpc/microwatt: Use standard 16550 UART for console
2021-06-21 21:16:31 +10:00
udbg.c
isystem: ship and use stdarg.h
2021-08-19 09:02:55 +09:00
uprobes.c
powerpc/64s: avoid reloading (H)SRR registers if they are still valid
2021-06-25 00:06:55 +10:00
vdso32_wrapper.S
powerpc/vdso: fix unnecessary rebuilds of vgettimeofday.o
2021-01-30 22:23:42 +11:00
vdso64_wrapper.S
powerpc/vdso: fix unnecessary rebuilds of vgettimeofday.o
2021-01-30 22:23:42 +11:00
vdso.c
powerpc/vdso: Add support for time namespaces
2021-04-14 23:04:44 +10:00
vecemu.c
powerpc: Define and use get_user_instr() et. al.
2020-05-19 00:10:37 +10:00
vector.S
powerpc/32: Remove unneccessary calculations in load_up_{fpu/altivec}
2021-08-18 23:49:55 +10:00
vmlinux.lds.S
powerpc: Mark .opd section read-only
2021-10-14 21:47:34 +11:00
watchdog.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00