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Nathan Lynch 7280fdb80b powerpc/rtas: avoid scheduling in rtas_os_term() 
[ Upstream commit 6c606e57eecc37d6b36d732b1ff7e55b7dc32dd4 ]

It's unsafe to use rtas_busy_delay() to handle a busy status from
the ibm,os-term RTAS function in rtas_os_term():

Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
BUG: sleeping function called from invalid context at arch/powerpc/kernel/rtas.c:618
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1, name: swapper/0
preempt_count: 2, expected: 0
CPU: 7 PID: 1 Comm: swapper/0 Tainted: G      D            6.0.0-rc5-02182-gf8553a572277-dirty #9
Call Trace:
[c000000007b8f000] [c000000001337110] dump_stack_lvl+0xb4/0x110 (unreliable)
[c000000007b8f040] [c0000000002440e4] __might_resched+0x394/0x3c0
[c000000007b8f0e0] [c00000000004f680] rtas_busy_delay+0x120/0x1b0
[c000000007b8f100] [c000000000052d04] rtas_os_term+0xb8/0xf4
[c000000007b8f180] [c0000000001150fc] pseries_panic+0x50/0x68
[c000000007b8f1f0] [c000000000036354] ppc_panic_platform_handler+0x34/0x50
[c000000007b8f210] [c0000000002303c4] notifier_call_chain+0xd4/0x1c0
[c000000007b8f2b0] [c0000000002306cc] atomic_notifier_call_chain+0xac/0x1c0
[c000000007b8f2f0] [c0000000001d62b8] panic+0x228/0x4d0
[c000000007b8f390] [c0000000001e573c] do_exit+0x140c/0x1420
[c000000007b8f480] [c0000000001e586c] make_task_dead+0xdc/0x200

Use rtas_busy_delay_time() instead, which signals without side effects
whether to attempt the ibm,os-term RTAS call again.

Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221118150751.469393-5-nathanl@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-01-12 11:58:46 +01:00
..
ptrace
powerpc/32: Fix overread/overwrite of thread_struct via ptrace
2022-06-14 18:36:27 +02:00
syscalls
compat: remove some compat entry points
2021-09-08 15:32:35 -07:00
trace
powerpc: flexible GPR range save/restore macros
2022-07-12 16:35:02 +02:00
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
…
align.c
powerpc: Rename probe_kernel_read_inst()
2021-04-21 22:52:33 +10:00
asm-offsets.c
Merge branch 'fixes' into next
2021-09-03 22:54:12 +10:00
audit.c
…
btext.c
powerpc/btext: add missing of_node_put
2022-01-27 11:04:57 +01:00
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
…
compat_audit.c
…
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
…
cpu_setup_fsl_booke.S
powerpc: Retire e200 core (mpc555x processor)
2020-12-05 21:49:18 +11:00
cpu_setup_pa6t.S
…
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
…
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/iommu: Report the correct most efficient DMA mask for PCI devices
2021-09-30 17:10:17 +10:00
dma-mask.c
…
dma-swiotlb.c
…
dt_cpu_ftrs.c
arch: powerpc: Stop building and using oprofile
2021-01-29 10:05:51 +05:30
early_32.c
…
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
…
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: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
entry_32.S
powerpc: flexible GPR range save/restore macros
2022-07-12 16:35:02 +02:00
entry_64.S
powerpc/rtas: Keep MSR[RI] set when calling RTAS
2022-06-09 10:22:42 +02:00
epapr_hcalls.S
…
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: flexible GPR range save/restore macros
2022-07-12 16:35:02 +02:00
exceptions-64s.S
powerpc: flexible GPR range save/restore macros
2022-07-12 16:35:02 +02:00
fadump.c
powerpc/fadump: fix PT_LOAD segment for boot memory area
2022-06-09 10:23:07 +02:00
firmware.c
powerpc: fix unbalanced node refcount in check_kvm_guest()
2021-11-18 19:16:51 +01:00
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/8xx: Fix pinned TLBs with CONFIG_STRICT_KERNEL_RWX
2021-11-25 09:48:44 +01:00
head_32.h
powerpc: flexible GPR range save/restore macros
2022-07-12 16:35:02 +02:00
head_40x.S
powerpc/40x: Map 32Mbytes of memory at startup
2022-01-27 11:05:01 +01:00
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/32: Set an IBAT covering up to _einittext during init
2022-08-25 11:40:43 +02:00
head_booke.h
powerpc: flexible GPR range save/restore macros
2022-07-12 16:35:02 +02:00
head_fsl_booke.S
powerpc updates for 5.15
2021-09-03 11:22:50 -07:00
hw_breakpoint_constraints.c
powerpc/uaccess: Remove __get/put_user_inatomic()
2021-04-03 21:21:41 +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/mm: Switch obsolete dssall to .long
2022-06-14 18:36:27 +02:00
idle_book3e.S
…
idle_book3s.S
powerpc/idle: Don't corrupt back chain when going idle
2021-10-20 21:37:58 +11:00
idle_e500.S
powerpc/32: Return directly from power_save_ppc32_restore()
2021-03-29 13:22:10 +11:00
idle.c
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:36:27 +02:00
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: flexible GPR range save/restore macros
2022-07-12 16:35:02 +02:00
interrupt.c
powerpc: Avoid discarding flags in system_call_exception()
2022-01-27 11:03:22 +01:00
io-workarounds.c
powerpc: Fix reverse map real-mode address lookup with huge vmalloc
2021-05-28 22:54:27 +10:00
io.c
…
iomap.c
powerpc: inline iomap accessors
2020-12-04 01:01:09 +11:00
iommu.c
powerpc/iommu: Fix iommu_table_in_use for a small default DMA window case
2022-08-17 14:24:12 +02:00
irq.c
powerpc/64: warn if local irqs are enabled in NMI or hardirq context
2021-10-07 19:54:55 +11:00
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 null pointer reference in arch_prepare_kprobe()
2022-10-26 12:35:23 +02:00
kvm_emul.S
…
kvm.c
gup: Turn fault_in_pages_{readable,writeable} into fault_in_{readable,writeable}
2022-05-01 17:22:28 +02:00
l2cr_6xx.S
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:36:27 +02:00
legacy_serial.c
powerpc/legacy_serial: Fix UBSAN: array-index-out-of-bounds
2021-05-12 11:07:39 +10:00
Makefile
powerpc/64s: Disable stack variable initialisation for prom_init
2022-08-17 14:23:05 +02:00
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/module_64: Fix livepatching for RO modules
2021-12-22 09:32:49 +01:00
module.c
powerpc/modules: Don't WARN on first module allocation attempt
2022-01-27 11:04:08 +01:00
msi.c
…
note.S
…
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: flexible GPR range save/restore macros
2022-07-12 16:35:02 +02:00
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
Revert "powerpc/rtas: Implement reentrant rtas call"
2022-10-15 07:59:02 +02:00
pci_32.c
…
pci_64.c
mm/vmalloc: remove unmap_kernel_range
2021-04-30 11:20:40 -07:00
pci_dn.c
powerpc/pci_dn: Add missing of_node_put()
2022-10-26 12:35:22 +02:00
pci_of_scan.c
…
pci-common.c
powerpc/pci: Fix get_phb_number() locking
2022-08-25 11:40:23 +02:00
pci-hotplug.c
powerpc/eeh: Release EEH device state synchronously
2020-05-18 21:58:44 +10:00
pmc.c
…
ppc32.h
…
ppc_save_regs.S
…
proc_powerpc.c
…
process.c
powerpc: Enable execve syscall exit tracepoint
2022-06-29 09:03:30 +02:00
prom_init_check.sh
powerpc/prom_init: Fix kernel config grep
2022-07-07 17:53:24 +02:00
prom_init.c
powerpc/prom_init: Fix improper check of prom_getprop()
2022-01-27 11:04:06 +01:00
prom_parse.c
…
prom.c
powerpc/64: Init jump labels before parse_early_param()
2022-08-25 11:40:45 +02:00
reloc_32.S
powerpc: Avoid link stack corruption in misc asm functions
2021-08-25 13:35:47 +10:00
reloc_64.S
powerpc/64: Add UADDR64 relocation support
2022-05-09 09:14:44 +02:00
rtas_flash.c
…
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
powerpc/rtas: avoid scheduling in rtas_os_term()
2023-01-12 11:58:46 +01:00
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/security: Add a helper to query stf_barrier type
2021-10-07 19:52:58 +11:00
secvar-ops.c
…
secvar-sysfs.c
powerpc/secvar: fix refcount leak in format_show()
2022-04-13 20:59:08 +02:00
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: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
setup.h
powerpc: remove unneeded semicolons
2021-02-09 00:10:50 +11:00
signal_32.c
gup: Turn fault_in_pages_{readable,writeable} into fault_in_{readable,writeable}
2022-05-01 17:22:28 +02:00
signal_64.c
gup: Turn fault_in_pages_{readable,writeable} into fault_in_{readable,writeable}
2022-05-01 17:22:28 +02:00
signal.c
entry: rseq: Call rseq_handle_notify_resume() in tracehook_notify_resume()
2021-09-22 10:24:01 -04:00
signal.h
powerpc/signal32: Fix sigset_t copy
2021-11-25 09:48:44 +01:00
smp-tbsync.c
…
smp.c
powerpc/fadump: Fix inaccurate CPU state info in vmcore generated with panic
2022-01-27 11:05:02 +01:00
stacktrace.c
powerpc/stacktrace: Include linux/delay.h
2021-08-03 22:33:37 +10:00
suspend.c
…
swsusp_32.S
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:36:27 +02:00
swsusp_64.c
…
swsusp_asm64.S
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:36:27 +02:00
swsusp_booke.S
…
swsusp.c
…
sys_ppc32.c
powerpc: Fix fallocate and fadvise64_64 compat parameter combination
2022-10-26 12:35:22 +02:00
syscalls.c
powerpc: Fix fallocate and fadvise64_64 compat parameter combination
2022-10-26 12:35:22 +02:00
sysfs.c
powerpc/smp: Fix OOPS in topology_init()
2021-08-07 08:53:59 +10:00
systbl_chk.sh
…
systbl.S
powerpc: align syscall table for ppc32
2022-09-08 12:28:03 +02:00
tau_6xx.c
powerpc/tau: Add 'static' storage qualifier to 'tau_work' definition
2021-08-20 17:00:53 +10:00
time.c
Merge branch 'fixes' into next
2021-09-03 22:54:12 +10:00
tm.S
powerpc/tm: Fix more userspace r13 corruption
2022-07-12 16:35:02 +02:00
traps.c
powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
2021-10-07 19:54:55 +11:00
ucall.S
…
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/64: Add UADDR64 relocation support
2022-05-09 09:14:44 +02:00
watchdog.c
powerpc/watchdog: Fix missed watchdog reset due to memory ordering race
2022-01-27 11:04:57 +01:00