linux

iv/linux

History

Jean-Philippe Brucker 490a02cd82 arm64: kprobes: Use BRK instead of single-step when executing instructions out-of-line

commit 7ee31a3aa8f490c6507bc4294df6b70bed1c593e upstream.

Commit 36dadef23fcc ("kprobes: Init kprobes in early_initcall") enabled
using kprobes from early_initcall. Unfortunately at this point the
hardware debug infrastructure is not operational. The OS lock may still
be locked, and the hardware watchpoints may have unknown values when
kprobe enables debug monitors to single-step instructions.

Rather than using hardware single-step, append a BRK instruction after
the instruction to be executed out-of-line.

Fixes: 36dadef23fcc ("kprobes: Init kprobes in early_initcall")
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/20201103134900.337243-1-jean-philippe@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-06-22 14:11:24 +02:00

boot

arm64: dts: qcom: ipq8074: fix the sleep clock frequency

2022-06-14 18:11:49 +02:00

configs

arm64/ARM: configs: Change CONFIG_REMOTEPROC from m to y

2019-09-30 11:48:00 -07:00

crypto

crypto: arm64/sha - add missing module aliases

2021-03-04 10:26:44 +01:00

include

arm64: kprobes: Use BRK instead of single-step when executing instructions out-of-line