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bcaf669b4b
linux/arch/arm64/kernel
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Yang Shi bcaf669b4b arm64: disable kasan when accessing frame->fp in unwind_frame 
When boot arm64 kernel with KASAN enabled, the below error is reported by
kasan:

BUG: KASAN: out-of-bounds in unwind_frame+0xec/0x260 at addr ffffffc064d57ba0
Read of size 8 by task pidof/499
page:ffffffbdc39355c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x0()
page dumped because: kasan: bad access detected
CPU: 2 PID: 499 Comm: pidof Not tainted 4.5.0-rc1 #119
Hardware name: Freescale Layerscape 2085a RDB Board (DT)
Call trace:
[<ffffffc00008d078>] dump_backtrace+0x0/0x290
[<ffffffc00008d32c>] show_stack+0x24/0x30
[<ffffffc0006a981c>] dump_stack+0x8c/0xd8
[<ffffffc0002e4400>] kasan_report_error+0x558/0x588
[<ffffffc0002e4958>] kasan_report+0x60/0x70
[<ffffffc0002e3188>] __asan_load8+0x60/0x78
[<ffffffc00008c92c>] unwind_frame+0xec/0x260
[<ffffffc000087e60>] get_wchan+0x110/0x160
[<ffffffc0003b647c>] do_task_stat+0xb44/0xb68
[<ffffffc0003b7730>] proc_tgid_stat+0x40/0x50
[<ffffffc0003ac840>] proc_single_show+0x88/0xd8
[<ffffffc000345be8>] seq_read+0x370/0x770
[<ffffffc00030aba0>] __vfs_read+0xc8/0x1d8
[<ffffffc00030c0ec>] vfs_read+0x94/0x168
[<ffffffc00030d458>] SyS_read+0xb8/0x128
[<ffffffc000086530>] el0_svc_naked+0x24/0x28
Memory state around the buggy address:
 ffffffc064d57a80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f4 f4
 ffffffc064d57b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffc064d57b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                  ^
 ffffffc064d57c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffc064d57c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Since the shadow byte pointed by the report is 0, so it may mean it is just hit
oob in non-current task. So, disable the instrumentation to silence these
warnings.

Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-02-09 17:55:30 +00:00
..
vdso arm64: build vdso without libgcov 2015-11-12 15:18:07 +00:00
.gitignore
acpi.c Power management and ACPI updates for v4.4-rc1 2015-11-04 18:10:13 -08:00
alternative.c arm64: mm: fold alternatives into .init 2015-12-10 17:36:08 +00:00
arm64ksyms.c ARM: 8480/2: arm64: add implementation for arm-smccc 2016-01-04 16:24:45 +00:00
armv8_deprecated.c arm64: add __init/__initdata section marker to some functions/variables 2015-12-02 12:17:11 +00:00
asm-offsets.c * s390: Support for runtime instrumentation within guests, 2016-01-12 13:22:12 -08:00
cacheinfo.c arm64: kernel: add support for cpu cache information 2015-01-15 11:55:07 +00:00
cpu_errata.c arm64: KVM: Add workaround for Cortex-A57 erratum 834220 2015-11-24 17:58:14 +01:00
cpu_ops.c arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
cpufeature.c arm64: add __init/__initdata section marker to some functions/variables 2015-12-02 12:17:11 +00:00
cpuidle.c arm64: cpuidle: add __init section marker to arm_cpuidle_init 2015-07-02 17:44:27 +01:00
cpuinfo.c arm64: restore bogomips information in /proc/cpuinfo 2015-11-19 17:57:18 +00:00
debug-monitors.c driver core update for 4.4-rc1 2015-11-04 21:50:37 -08:00
efi-entry.S arm64/efi: isolate EFI stub from the kernel proper 2015-10-12 16:20:12 +01:00
efi.c arm64/efi: refactor EFI init and runtime code for reuse by 32-bit ARM 2015-12-09 16:57:23 +00:00
entry32.S arm64: entry32: remove pointless register assignment 2015-07-10 16:47:13 +01:00
entry-fpsimd.S arm64: fpsimd: fix a typo in fpsimd_save_partial_state ENDPROC 2014-07-31 11:42:42 +01:00
entry-ftrace.S arm64: ftrace: fix function_graph tracer panic 2015-10-02 11:12:56 +01:00
entry.S arm64: entry: remove pointless SPSR mode check 2016-01-06 15:40:38 +00:00
fpsimd.c arm64: add __init/__initdata section marker to some functions/variables 2015-12-02 12:17:11 +00:00
ftrace.c arm64: ftrace: modify a stack frame in a safe way 2015-12-21 17:26:01 +00:00
head.S arm64: kernel: fix architected PMU registers unconditional access 2016-01-25 11:09:06 +00:00
hw_breakpoint.c arm64: Fix missing #include in hw_breakpoint.c 2015-10-12 12:10:53 +01:00
hyp-stub.S
image.h arm64: hide __efistub_ aliases from kallsyms 2016-01-25 11:09:04 +00:00
insn.c arm64: insn: remove BUG_ON from codegen 2016-01-17 19:15:26 -05:00
io.c arm64: optimize memcpy_{from,to}io() and memset_io() 2014-11-06 17:25:27 +00:00
irq.c arm64: remove irq_count and do_softirq_own_stack() 2015-12-21 17:26:01 +00:00
jump_label.c jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP} 2015-08-03 11:34:12 +02:00
kgdb.c arm64/debug: Simplify BRK insn opcode declarations 2015-07-27 11:08:42 +01:00
kuser32.S
Makefile xen: features and fixes for 4.5-rc0 2016-01-12 13:05:36 -08:00
module.c arm64: module: avoid undefined shift behavior in reloc_data() 2016-01-05 11:27:20 +00:00
paravirt.c arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops 2015-12-21 14:40:54 +00:00
pci.c ARM64: PCI: do not enable resources on PROBE_ONLY systems 2015-07-30 20:17:07 +01:00
perf_callchain.c arm64: ftrace: fix a stack tracer's output under function graph tracer 2015-12-21 17:26:02 +00:00
perf_event.c arm64: perf: add support for Cortex-A72 2015-12-22 14:45:35 +00:00
perf_regs.c perf: Move task_pt_regs sampling into arch code 2015-01-09 11:12:28 +01:00
process.c arm64: ftrace: fix a stack tracer's output under function graph tracer 2015-12-21 17:26:02 +00:00
psci.c drivers: firmware: psci: move power_state handling to generic code 2015-10-02 14:35:16 +01:00
ptrace.c arm64: Clear out any singlestep state on a ptrace detach operation 2015-12-07 17:48:21 +00:00
return_address.c arm64: ftrace: fix a stack tracer's output under function graph tracer 2015-12-21 17:26:02 +00:00
setup.c arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
signal32.c arm64: compat: fix vfp save/restore across signal handlers in big-endian 2015-09-17 11:57:03 +01:00
signal.c arm64: Removed unused variable 2015-04-13 20:40:10 +02:00
sleep.S arm64: Store struct thread_info in sp_el0 2015-12-08 11:40:48 +00:00
smccc-call.S ARM: 8480/2: arm64: add implementation for arm-smccc 2016-01-04 16:24:45 +00:00
smp_spin_table.c ARM64: kernel: make cpu_ops hooks DT agnostic 2015-05-19 16:09:29 +01:00
smp.c arm64: smp: make of_parse_and_init_cpus static 2015-11-12 15:18:14 +00:00
stacktrace.c arm64: disable kasan when accessing frame->fp in unwind_frame 2016-02-09 17:55:30 +00:00
suspend.c arm64: kernel: pause/unpause function graph tracer in cpu_suspend() 2015-11-17 17:11:45 +00:00
sys32.c arm64: fix implementation of mmap2 compat syscall 2015-03-19 10:43:51 +00:00
sys_compat.c arm64: compat: align cacheflush syscall with arch/arm 2014-12-01 13:31:12 +00:00
sys.c arm64: make sys_call_table const 2015-01-27 09:38:08 +00:00
time.c arm64: ftrace: fix a stack tracer's output under function graph tracer 2015-12-21 17:26:02 +00:00
topology.c arm64: kernel: remove non-legit DT warnings when booting using ACPI 2015-07-27 11:08:41 +01:00
trace-events-emulation.h arm64: Trace emulation of AArch32 legacy instructions 2014-11-20 16:35:02 +00:00
traps.c arm64: traps: address fallout from printk -> pr_* conversion 2015-12-21 17:26:02 +00:00
vdso.c arm64: VDSO: fix coarse clock monotonicity regression 2015-08-10 15:37:45 +01:00
vmlinux.lds.S arm64 updates for 4.5: 2016-01-12 12:23:33 -08:00