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Douglas Anderson 2bb93af182 ARM: 8997/2: hw_breakpoint: Handle inexact watchpoint addresses 
[ Upstream commit 22c9e58299 ]

This is commit fdfeff0f9e ("arm64: hw_breakpoint: Handle inexact
watchpoint addresses") but ported to arm32, which has the same
problem.

This problem was found by Android CTS tests, notably the
"watchpoint_imprecise" test [1].  I tested locally against a copycat
(simplified) version of the test though.

[1] https://android.googlesource.com/platform/bionic/+/master/tests/sys_ptrace_test.cpp

Link: https://lkml.kernel.org/r/20191019111216.1.I82eae759ca6dc28a245b043f485ca490e3015321@changeid

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-11-05 11:08:39 +01:00
..
.gitignore
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arch_timer.c
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armksyms.c
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asm-offsets.c
include/linux/compiler*.h: make compiler-*.h mutually exclusive
2018-08-22 17:31:34 -07:00
atags_compat.c
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atags_parse.c
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atags_proc.c
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atags.h
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bios32.c
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bugs.c
ARM: clean up per-processor check_bugs method call
2019-02-20 10:25:38 +01:00
cpuidle.c
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crash_dump.c
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debug.S
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devtree.c
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dma-isa.c
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dma.c
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early_printk.c
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efi.c
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elf.c
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entry-armv.S
ARM: uaccess: consolidate uaccess asm to asm/uaccess-asm.h
2020-06-03 08:19:34 +02:00
entry-common.S
ARM: 8802/1: Call syscall_trace_exit even when system call skipped
2019-11-24 08:20:56 +01:00
entry-ftrace.S
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entry-header.S
ARM: uaccess: consolidate uaccess asm to asm/uaccess-asm.h
2020-06-03 08:19:34 +02:00
entry-v7m.S
ARM: 8830/1: NOMMU: Toggle only bits in EXC_RETURN we are really care of
2019-04-05 22:33:12 +02:00
fiq.c
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fiqasm.S
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ftrace.c
ARM: function_graph: Simplify with function_graph_enter()
2018-12-05 19:32:09 +01:00
head-common.S
ARM: 8914/1: NOMMU: Fix exc_ret for XIP
2019-11-06 13:06:10 +01:00
head-inflate-data.c
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head-nommu.S
ARM: 8849/1: NOMMU: Fix encodings for PMSAv8's PRBAR4/PRLAR4
2020-01-27 14:50:28 +01:00
head.S
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hibernate.c
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hw_breakpoint.c
ARM: 8997/2: hw_breakpoint: Handle inexact watchpoint addresses
2020-11-05 11:08:39 +01:00
hyp-stub.S
ARM: 8955/1: virt: Relax arch timer version check during early boot
2020-02-05 14:43:50 +00:00
insn.c
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io.c
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irq.c
ARM: 8824/1: fix a migrating irq bug when hotplug cpu
2019-03-23 20:09:48 +01:00
isa.c
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iwmmxt.S
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jump_label.c
jump_label: move 'asm goto' support test to Kconfig
2019-06-04 08:02:34 +02:00
kgdb.c
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machine_kexec.c
ARM: avoid Cortex-A9 livelock on tight dmb loops
2019-04-05 22:33:12 +02:00
Makefile
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module-plts.c
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module.c
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module.lds
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opcodes.c
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paravirt.c
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patch.c
ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t
2019-04-20 09:16:04 +02:00
perf_callchain.c
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perf_event_v6.c
arm_pmu: Tidy up clear_event_idx call backs
2018-07-10 18:19:02 +01:00
perf_event_v7.c
arm_pmu: Tidy up clear_event_idx call backs
2018-07-10 18:19:02 +01:00
perf_event_xscale.c
arm_pmu: Tidy up clear_event_idx call backs
2018-07-10 18:19:02 +01:00
perf_regs.c
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pj4-cp0.c
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process.c
mm: zero out the vma in vma_init()
2018-08-22 10:52:44 -07:00
psci_smp.c
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ptrace.c
ARM: 8977/1: ptrace: Fix mask for thumb breakpoint hook
2020-06-22 09:04:59 +02:00
reboot.c
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reboot.h
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relocate_kernel.S
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return_address.c
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setup.c
ARM: spectre-v2: per-CPU vtables to work around big.Little systems
2019-02-20 10:25:38 +01:00
signal.c
ARM: 8793/1: signal: replace __put_user_error with __put_user
2019-02-20 10:25:36 +01:00
signal.h
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sigreturn_codes.S
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sleep.S
ARM: 8847/1: pm: fix HYP/SVC mode mismatch when MCPM is used
2020-01-27 14:50:28 +01:00
smccc-call.S
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smp_scu.c
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smp_tlb.c
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smp_twd.c
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smp.c
ARM: prevent tracing IPI_CPU_BACKTRACE
2019-06-15 11:54:00 +02:00
stacktrace.c
ARM: 8948/1: Prevent OOB access in stacktrace
2020-10-01 13:14:31 +02:00
suspend.c
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swp_emulate.c
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sys_arm.c
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sys_oabi-compat.c
ARM: 8792/1: oabi-compat: copy oabi events using __copy_to_user()
2019-02-20 10:25:36 +01:00
tcm.c
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thumbee.c
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time.c
ARM/time: Remove read_boot_clock64()
2018-07-20 00:02:41 +02:00
topology.c
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traps.c
ARM: 8948/1: Prevent OOB access in stacktrace
2020-10-01 13:14:31 +02:00
unwind.c
ARM: 8840/1: use a raw_spinlock_t in unwind
2019-04-05 22:33:01 +02:00
v7m.c
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vdso.c
ARM: 8957/1: VDSO: Match ARMv8 timer in cntvct_functional()
2020-03-20 11:55:59 +01:00
vmlinux-xip.lds.S
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vmlinux.lds.h
vmlinux.lds.h: Fix incomplete .text.exit discards
2018-10-12 08:54:58 +11:00
vmlinux.lds.S
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xscale-cp0.c
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