Thomas Gleixner 5fa5595072 x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL ... Baoquan reported that after triggering a crash the subsequent crash-kernel fails to boot about half of the time. It triggers a NULL pointer dereference in the periodic tick code. This happens because the legacy timer interrupt (IRQ0) is resent in software which happens in soft interrupt (tasklet) context. In this context get_irq_regs() returns NULL which leads to the NULL pointer dereference. The reason for the resend is a spurious APIC interrupt on the IRQ0 vector which is captured and leads to a resend when the legacy timer interrupt is enabled. This is wrong because the legacy PIC interrupts are level triggered and therefore should never be resent in software, but nothing ever sets the IRQ_LEVEL flag on those interrupts, so the core code does not know about their trigger type. Ensure that IRQ_LEVEL is set when the legacy PCI interrupts are set up. Fixes: a4633adcdb ("[PATCH] genirq: add genirq sw IRQ-retrigger") Reported-by: Baoquan He <bhe@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Baoquan He <bhe@redhat.com> Link: https://lore.kernel.org/r/87mt6rjrra.ffs@tglx		2023-01-16 17:24:56 +01:00
..
acpi	x86/acpi/cstate: Optimize ARB_DISABLE on Centaur CPUs	2022-11-11 09:42:05 -08:00
apic	A set of changes for the x86 APIC code:	2022-12-12 12:30:31 -08:00
cpu	x86/resctrl: Fix event counts regression in reused RMIDs	2023-01-10 19:51:59 +01:00
fpu	* Clarify XSAVE consistency warnings	2022-12-12 14:41:57 -08:00
kprobes	x86/kprobes: Fix optprobe optimization check with CONFIG_RETHUNK	2022-12-27 12:51:58 +01:00
.gitignore
alternative.c	New Feature:	2022-12-17 14:06:53 -06:00
amd_gart_64.c	x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros	2022-12-15 10:37:27 -08:00
amd_nb.c	x86/amd_nb: Add AMD PCI IDs for SMN communication	2022-07-20 17:35:40 +02:00
aperture_64.c	x86: Fix various duplicate-word comment typos	2022-08-15 19:17:52 +02:00
apm_32.c	x86/ibt: Disable IBT around firmware	2022-03-15 10:32:40 +01:00
asm-offsets_32.c
asm-offsets_64.c	x86: Fixup asm-offsets duplicate	2022-10-17 16:41:06 +02:00
asm-offsets.c	Linux 6.1-rc6	2022-11-21 23:01:51 +01:00
audit_64.c	audit: add support for the openat2 syscall	2021-10-01 16:52:48 -04:00
bootflag.c
callthunks.c	x86/calldepth: Fix incorrect init section references	2022-12-27 12:51:58 +01:00
cfi.c	x86: Add support for CONFIG_CFI_CLANG	2022-09-26 10:13:16 -07:00
check.c
cpuid.c	driver core: make struct class.devnode() take a const *	2022-11-24 17:12:27 +01:00
crash_core_32.c
crash_core_64.c
crash_dump_32.c	vmcore: convert copy_oldmem_page() to take an iov_iter	2022-04-29 14:37:59 -07:00
crash_dump_64.c	use less confusing names for iov_iter direction initializers	2022-11-25 13:01:55 -05:00
crash.c	x86/kexec: Fix double-free of elf header buffer	2023-01-02 18:56:21 +01:00
devicetree.c	x86/of: Add support for boot time interrupt delivery mode configuration	2022-12-02 14:57:14 +01:00
doublefault_32.c	exit/doublefault: Remove apparently bogus comment about rewind_stack_do_exit	2021-10-20 13:09:43 -05:00
dumpstack_32.c	x86/percpu: Move irq_stack variables next to current_task	2022-10-17 16:41:05 +02:00
dumpstack_64.c	x86/percpu: Move irq_stack variables next to current_task	2022-10-17 16:41:05 +02:00
dumpstack.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
e820.c	x86/kexec: Carry forward IMA measurement log on kexec	2022-07-01 15:22:16 +02:00
early_printk.c	x86/earlyprintk: Clean up pciserial	2022-08-29 12:19:25 +02:00
early-quirks.c	drm/i915/rpl-p: Add PCI IDs	2022-04-19 17:14:09 -07:00
ebda.c
eisa.c
espfix_64.c	x86/espfix: Use get_random_long() rather than archrandom	2022-10-31 20:12:50 +01:00
ftrace_32.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
ftrace_64.S	Merge branch 'x86/urgent' into x86/core, to resolve conflict	2022-10-22 10:06:18 +02:00
ftrace.c	New Feature:	2022-12-17 14:06:53 -06:00
head32.c
head64.c	x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros	2022-12-15 10:37:27 -08:00
head_32.S	x86/asm/32: Remove setup_once()	2022-12-02 14:06:34 +01:00
head_64.S	x86/callthunks: Add call patching for call depth tracking	2022-10-17 16:41:13 +02:00
hpet.c	rtc: Check return value from mc146818_get_time()	2021-12-16 21:50:06 +01:00
hw_breakpoint.c	x86/mm: Randomize per-cpu entry area	2022-12-15 10:37:26 -08:00
i8237.c
i8253.c
i8259.c	x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL	2023-01-16 17:24:56 +01:00
idt.c	x86/traps: Add #VE support for TDX guest	2022-04-07 08:27:51 -07:00
io_delay.c
ioport.c
irq_32.c	x86/percpu: Move irq_stack variables next to current_task	2022-10-17 16:41:05 +02:00
irq_64.c	x86/percpu: Move irq_stack variables next to current_task	2022-10-17 16:41:05 +02:00
irq_work.c
irq.c	x86/irq: Ensure PI wakeup handler is unregistered before module unload	2021-10-22 12:45:35 -04:00
irqflags.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
irqinit.c	x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL	2023-01-16 17:24:56 +01:00
itmt.c	x86/sched: Decrease further the priorities of SMT siblings	2021-10-05 15:51:59 +02:00
jailhouse.c
jump_label.c	jump_label: make initial NOP patching the special case	2022-06-24 09:48:55 +02:00
kdebugfs.c	x86/boot: Fix memremap of setup_indirect structures	2022-03-09 12:49:44 +01:00
kexec-bzimage64.c	integrity-v6.0	2022-08-02 15:21:18 -07:00
kgdb.c
ksysfs.c	x86/boot: Fix memremap of setup_indirect structures	2022-03-09 12:49:44 +01:00
kvm.c	ARM64:	2022-12-15 11:12:21 -08:00
kvmclock.c	x86/kvm: Don't waste kvmclock memory if there is nopv parameter	2022-04-13 13:37:19 -04:00
ldt.c	memcg: enable accounting for ldt_struct objects	2021-09-03 09:58:13 -07:00
machine_kexec_32.c	x86/kexec: Set_[gi]dt() -> native_[gi]dt_invalidate() in machine_kexec_*.c	2021-05-21 12:36:45 +02:00
machine_kexec_64.c	x86/kexec: fix memory leak of elf header buffer	2022-06-01 15:57:16 -07:00
Makefile	- Add the call depth tracking mitigation for Retbleed which has	2022-12-14 15:03:00 -08:00
mmconf-fam10h_64.c	x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG	2021-05-10 07:51:38 +02:00
module.c	- Add the call depth tracking mitigation for Retbleed which has	2022-12-14 15:03:00 -08:00
mpparse.c	x86: Avoid magic number with ELCR register accesses	2021-08-10 23:31:43 +02:00
msr.c	driver core: make struct class.devnode() take a const *	2022-11-24 17:12:27 +01:00
nmi_selftest.c
nmi.c	x86/nmi: Make register_nmi_handler() more robust	2022-05-17 09:25:25 +02:00
paravirt-spinlocks.c
paravirt.c	x86/paravirt: Use common macro for creating simple asm paravirt functions	2022-11-24 13:56:44 +01:00
pci-dma.c	swiotlb: merge swiotlb-xen initialization into swiotlb	2022-04-18 07:21:13 +02:00
pcspeaker.c
perf_regs.c
platform-quirks.c
pmem.c	x86/pmem: Fix platform-device leak in error path	2022-06-20 18:01:16 +02:00
probe_roms.c	x86/kernel: Validate ROM memory before accessing when SEV-SNP is active	2022-04-06 13:23:09 +02:00
process_32.c	x86/percpu: Move current_top_of_stack next to current_task	2022-10-17 16:41:05 +02:00
process_64.c	- Add the call depth tracking mitigation for Retbleed which has	2022-12-14 15:03:00 -08:00
process.c	Random number generator updates for Linux 6.2-rc1.	2022-12-12 16:22:22 -08:00
process.h	x86: Snapshot thread flags	2021-12-01 00:06:43 +01:00
ptrace.c	x86: Improve formatting of user_regset arrays	2022-11-01 15:36:52 -07:00
pvclock.c
quirks.c
reboot_fixups_32.c
reboot.c	x86: Use do_kernel_power_off()	2022-05-19 19:30:31 +02:00
relocate_kernel_32.S	x86/kexec: Disable RET on kexec	2022-07-09 13:12:32 +02:00
relocate_kernel_64.S	x86/callthunks: Add call patching for call depth tracking	2022-10-17 16:41:13 +02:00
resource.c	x86/PCI: Tidy E820 removal messages	2022-12-10 10:33:11 -06:00
rethook.c	x86,rethook: Fix arch_rethook_trampoline() to generate a complete pt_regs	2022-03-28 19:38:51 -07:00
rtc.c	x86/rtc: Rename mach_set_rtc_mmss() to mach_set_cmos_time()	2022-08-14 11:24:29 +02:00
setup_percpu.c	- Add the call depth tracking mitigation for Retbleed which has	2022-12-14 15:03:00 -08:00
setup.c	- Split MTRR and PAT init code to accomodate at least Xen PV and TDX	2022-12-13 14:56:56 -08:00
sev_verify_cbit.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
sev-shared.c	Revert "x86/sev: Expose sev_es_ghcb_hv_call() for use by HyperV"	2022-07-27 18:09:13 +02:00
sev.c	x86/insn: Avoid namespace clash by separating instruction decoder MMIO type from MMIO trace type	2023-01-03 18:46:06 +01:00
signal_32.c	x86/signal/32: Merge native and compat 32-bit signal code	2022-10-19 09:58:49 +02:00
signal_64.c	x86/signal/64: Move 64-bit signal code to its own file	2022-10-19 09:58:49 +02:00
signal_compat.c	signal: Deliver SIGTRAP on perf event asynchronously if blocked	2022-04-22 12:14:05 +02:00
signal.c	x86/signal/64: Move 64-bit signal code to its own file	2022-10-19 09:58:49 +02:00
smp.c
smpboot.c	- Add the call depth tracking mitigation for Retbleed which has	2022-12-14 15:03:00 -08:00
stacktrace.c	x86: remove __range_not_ok()	2022-02-25 09:36:05 +01:00
static_call.c	static_call: Add call depth tracking support	2022-10-17 16:41:16 +02:00
step.c	ptrace: Reimplement PTRACE_KILL by always sending SIGKILL	2022-05-11 14:34:28 -05:00
sys_ia32.c
sys_x86_64.c	x86/mm: Cleanup the control_va_addr_alignment() __setup handler	2022-05-04 18:20:42 +02:00
tboot.c	mm: remove rb tree.	2022-09-26 19:46:16 -07:00
time.c
tls.c
tls.h
topology.c	x86/cpu: Switch to cpu_feature_enabled() for X86_FEATURE_XENPV	2022-11-22 16:18:19 +01:00
trace_clock.c
trace.c	trace/osnoise: Fix an ifdef comment	2021-10-25 23:02:36 -04:00
tracepoint.c	x86/traceponit: Fix comment about irq vector tracepoints	2022-05-26 22:03:52 -04:00
traps.c	- Add the call depth tracking mitigation for Retbleed which has	2022-12-14 15:03:00 -08:00
tsc_msr.c
tsc_sync.c	x86/tsc: Add a timer to make sure TSC_adjust is always checked	2021-12-02 00:40:35 +01:00
tsc.c	x86/tsc: Make art_related_clocksource static	2022-10-17 16:20:48 +02:00
umip.c	x86/umip: Downgrade warning messages to debug loglevel	2021-09-25 13:23:28 +02:00
unwind_frame.c	x86: kmsan: don't instrument stack walking functions	2022-10-03 14:03:25 -07:00
unwind_guess.c	x86/unwind: Recover kretprobe trampoline entry	2021-09-30 21:24:07 -04:00
unwind_orc.c	Linux 6.1-rc6	2022-11-21 23:01:51 +01:00
uprobes.c	uprobes/x86: Allow to probe a NOP instruction with 0x66 prefix	2022-12-05 11:55:18 +01:00
verify_cpu.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
vm86_32.c	x86/32: Remove lazy GS macros	2022-04-14 14:09:43 +02:00
vmlinux.lds.S	x86/ibt: Implement FineIBT	2022-11-01 13:44:10 +01:00
vsmp_64.c
x86_init.c	x86/boot: Skip realmode init code when running as Xen PV guest	2022-11-25 12:05:22 +01:00