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484889fc85
linux_dsm_epyc7002/arch/mips/kernel
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David Daney 484889fc85 MIPS: Avoid clobbering struct pt_regs in kthreads 
The resume() implementation octeon_switch.S examines the saved cp0_status
register.  We were clobbering the entire pt_regs structure in kernel
threads leading to random crashes.

When switching away from a kernel thread, the saved cp0_status is examined
and if bit 30 is set it is cleared and the CP2 state saved into the pt_regs
structure.  Since the kernel thread stack overlaid the pt_regs structure
this resulted in a corrupt stack.  When the kthread with the corrupt stack
was resumed, it could crash if it used any of the data in the stack that was
clobbered.

We fix it by moving the kernel thread stack down so it doesn't overlay
pt_regs.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-08-03 17:52:41 +01:00
..
.gitignore [MIPS] Ignore vmlinux.lds generated files 2008-08-26 09:10:27 +01:00
8250-platform.c [MIPS] Put an end to <asm/serial.h>'s long and annyoing existence 2007-07-10 17:33:01 +01:00
asm-offsets.c MIPS: Add hibernation support 2009-06-17 11:06:31 +01:00
binfmt_elfn32.c remove div_long_long_rem 2008-05-01 08:03:58 -07:00
binfmt_elfo32.c MIPS: 64-bit: Fix o32 core dump 2009-07-03 15:45:27 +01:00
branch.c MIPS: Compute branch returns for Cavium OCTEON specific branch instructions. 2009-01-11 09:57:24 +00:00
cevt-bcm1480.c MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
cevt-ds1287.c Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
cevt-gt641xx.c Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
cevt-r4k.c MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
cevt-sb1250.c MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
cevt-smtc.c MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
cevt-txx9.c MIPS: TXx9: micro optimization for clocksource and clock_event 2009-06-17 11:06:25 +01:00
cpu-bugs64.c [MIPS] Add empty argument parenthesis to GCC_IMM_ASM 2008-05-12 16:46:52 +01:00
cpu-probe.c MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
csrc-bcm1480.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
csrc-ioasic.c Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
csrc-r4k.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
csrc-sb1250.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
early_printk.c [MIPS] fix sparse warning about setup_early_printk() 2008-07-15 18:44:29 +01:00
entry.S [MIPS] SMTC: Close tiny holes in the SMTC IPI replay system. 2008-10-03 17:58:58 +01:00
genex.S MIPS: Read watch registers with interrupts disabled. 2009-01-30 21:32:58 +00:00
gpio_txx9.c [MIPS] txx9: Make gpio_txx9 entirely spinlock-safe 2008-07-15 18:44:34 +01:00
head.S MIPS: Avoid clobbering struct pt_regs in kthreads 2009-08-03 17:52:41 +01:00
i8253.c MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
i8259.c cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
init_task.c mm: consolidate init_mm definition 2009-06-16 19:47:28 -07:00
irq_cpu.c MIPS: Enable GENERIC_HARDIRQS_NO__DO_IRQ for all platforms 2009-03-30 14:49:44 +02:00
irq_txx9.c MIPS: Eleminate filenames from comments 2009-08-03 17:52:40 +01:00
irq-gic.c MIPS: CMP: Extend IPI handling to CPU number 2009-07-03 15:45:26 +01:00
irq-gt641xx.c Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
irq-msc01.c MIPS: Enable GENERIC_HARDIRQS_NO__DO_IRQ for all platforms 2009-03-30 14:49:44 +02:00
irq-rm7000.c [MIPS] Fix broken rm7000/rm9000 interrupt handling 2008-02-19 17:01:31 +00:00
irq-rm9000.c on_each_cpu(): kill unused 'retry' parameter 2008-06-26 11:24:38 +02:00
irq.c Merge branches 'irq/genirq' and 'linus' into irq/core 2009-03-16 09:20:13 +01:00
kgdb.c MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
kspd.c CRED: Separate task security context from task_struct 2008-11-14 10:39:16 +11:00
linux32.c MIPS: Compat: Zero upper 32-bit of offset_high and offset_low. 2009-03-30 14:49:40 +02:00
machine_kexec.c [MIPS] Unconditionally writeback and invalidate caches on kexec. 2007-08-27 02:16:59 +01:00
Makefile MIPS: make cp0 counter clocksource/event usable as fallback. 2009-01-11 09:57:26 +00:00
mips_ksyms.c [MIPS] Export __copy_user_inatomic. 2007-03-07 00:07:17 +00:00
mips-mt-fpaff.c MIPS: SMTC: Fix build after recent creditial changes. 2009-01-30 21:32:56 +00:00
mips-mt.c [MIPS] Replace use of print_symbol with new %sP pointer format. 2008-07-15 18:44:33 +01:00
module.c module: cleanup FIXME comments about trimming exception table entries. 2009-06-12 21:47:05 +09:30
octeon_switch.S MIPS: Add Cavium OCTEON processor support files to arch/mips/cavium-octeon. 2009-01-11 09:57:21 +00:00
proc.c MIPS: Eleminate filenames from comments 2009-08-03 17:52:40 +01:00
process.c MIPS: Avoid clobbering struct pt_regs in kthreads 2009-08-03 17:52:41 +01:00
ptrace32.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
ptrace.c MIPS: Ptrace support for HARDWARE_WATCHPOINTS 2008-10-11 16:18:57 +01:00
r4k_fpu.S [MIPS] Check FCSR for pending interrupts, alternative version 2007-03-17 01:03:25 +00:00
r4k_switch.S [MIPS] Fix resume for 64K page size on R4000 class processors. 2007-07-12 17:41:05 +01:00
r2300_fpu.S
r2300_switch.S [MIPS] Disallow CpU exception in kernel again. 2007-04-20 14:58:37 +01:00
r6000_fpu.S
relocate_kernel.S [MIPS] Kexec: Fix several 64-bit bugs. 2007-07-31 21:35:36 +01:00
reset.c [MIPS] Export pm_power_off 2006-12-10 21:52:11 +00:00
rtlx.c device create: misc: convert device_create_drvdata to device_create 2008-10-16 09:24:43 -07:00
scall32-o32.S MIPS: Hookup new syscalls sys_rt_tgsigqueueinfo and sys_perf_counter_open. 2009-07-03 15:45:24 +01:00
scall64-64.S MIPS: Hookup new syscalls sys_rt_tgsigqueueinfo and sys_perf_counter_open. 2009-07-03 15:45:24 +01:00
scall64-n32.S MIPS: Hookup new syscalls sys_rt_tgsigqueueinfo and sys_perf_counter_open. 2009-07-03 15:45:24 +01:00
scall64-o32.S MIPS: Hookup new syscalls sys_rt_tgsigqueueinfo and sys_perf_counter_open. 2009-07-03 15:45:24 +01:00
setup.c MIPS: Stop using <asm-generic/int-l64.h>. 2009-03-30 14:49:41 +02:00
signal32.c MIPS: CVE-2009-0029: Enable syscall wrappers. 2009-02-27 17:56:35 +00:00
signal_n32.c [MIPS] Fix "no space between function name and open parenthesis" warnings. 2007-10-11 23:46:15 +01:00
signal-common.h [MIPS] replace remaining __FUNCTION__ occurrences 2008-04-28 17:14:27 +01:00
signal.c MIPS: CVE-2009-0029: Enable syscall wrappers. 2009-02-27 17:56:35 +00:00
smp-cmp.c MIPS: CMP: activate CMP support 2009-07-03 15:45:26 +01:00
smp-mt.c cpumask: centralize cpu_online_map and cpu_possible_map 2008-12-13 21:19:41 +10:30
smp-up.c MIPS: Add arch generic CPU hotplug 2009-06-24 18:34:40 +01:00
smp.c MIPS: Add arch generic CPU hotplug 2009-06-24 18:34:40 +01:00
smtc-asm.S [MIPS] SMTC: Don't set and restore irqregs ptr from self_ipi. 2007-06-11 18:20:53 +01:00
smtc-proc.c [MIPS] SMP: Call platform methods via ops structure. 2008-01-29 10:14:57 +00:00
smtc.c MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
spram.c [MIPS] Basic SPRAM support 2008-04-28 17:14:23 +01:00
stacktrace.c MIPS: Eleminate filenames from comments 2009-08-03 17:52:40 +01:00
sync-r4k.c MIPS: CMP: Update sync-r4k for current kernel 2009-07-03 15:45:27 +01:00
syscall.c MIPS: CVE-2009-0029: Enable syscall wrappers. 2009-02-27 17:56:35 +00:00
time.c [MIPS] unexport null_perf_irq() and make it static 2008-04-28 17:14:31 +01:00
topology.c MIPS: Add arch generic CPU hotplug 2009-06-24 18:34:40 +01:00
traps.c MIPS: Move Cavium CP0 hwrena impl bits to cpu-feature-overrides.h 2009-06-17 11:06:31 +01:00
unaligned.c MIPS: Use force_sig when handling address errors. 2009-05-14 13:50:29 +01:00
vmlinux.lds.S MIPS: Align .data.cacheline_aligned based on CONFIG_MIPS_L1_CACHE_SHIFT 2008-10-15 12:46:50 +01:00
vpe.c MIPS: MT: Remove unnecessary semicolons 2009-07-03 15:45:23 +01:00
watch.c MIPS: Add HARDWARE_WATCHPOINTS definitions and support code. 2008-10-11 16:18:56 +01:00