Tomislav Novak 4252c35010 hw_breakpoint: fix single-stepping when using bpf_overflow_handler ... [ Upstream commit d11a69873d ] Arm platforms use is_default_overflow_handler() to determine if the hw_breakpoint code should single-step over the breakpoint trigger or let the custom handler deal with it. Since bpf_overflow_handler() currently isn't recognized as a default handler, attaching a BPF program to a PERF_TYPE_BREAKPOINT event causes it to keep firing (the instruction triggering the data abort exception is never skipped). For example: # bpftrace -e 'watchpoint:0x10000:4:w { print("hit") }' -c ./test Attaching 1 probe... hit hit [...] ^C (./test performs a single 4-byte store to 0x10000) This patch replaces the check with uses_default_overflow_handler(), which accounts for the bpf_overflow_handler() case by also testing if one of the perf_event_output functions gets invoked indirectly, via orig_default_handler. Signed-off-by: Tomislav Novak <tnovak@meta.com> Tested-by: Samuel Gosselin <sgosselin@google.com> # arm64 Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/linux-arm-kernel/20220923203644.2731604-1-tnovak@fb.com/ Link: https://lore.kernel.org/r/20230605191923.1219974-1-tnovak@meta.com Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-09-23 10:47:03 +02:00
..
boot	arm64: dts: amlogic: meson-gxl: add missing unit address to eth-phy-mux node name	2023-03-11 16:26:34 +01:00
configs	arm64: defconfig: Enable Rockchip io-domain driver	2018-08-03 07:50:38 +02:00
crypto	crypto: arm64/sha2-ce - correct digest for empty data in finup	2019-07-31 07:28:35 +02:00
include	arm64: Add missing Set/Way CMO encodings	2023-06-28 10:14:20 +02:00
kernel	hw_breakpoint: fix single-stepping when using bpf_overflow_handler	2023-09-23 10:47:03 +02:00
kvm	arm64: KVM: Fix system register enumeration	2023-04-20 12:02:12 +02:00
lib	arm64: lib: use C string functions with KASAN enabled	2019-12-01 09:13:48 +01:00
mm	exit: Add and use make_task_dead.	2023-02-06 07:46:33 +01:00
net	bpf: get rid of pure_initcall dependency to enable jits	2019-08-25 10:50:02 +02:00
xen	arm64: kpti: Fix the interaction between ASID switching and software PAN	2018-02-16 20:22:49 +01:00
Kconfig	arm64: errata: Remove AES hwcap for COMPAT tasks	2022-11-03 23:50:50 +09:00
Kconfig.debug	arm64: relocation testing module	2017-04-04 17:03:32 +01:00
Kconfig.platforms	arm64: berlin: Select DW_APB_TIMER_OF	2020-11-05 11:07:04 +01:00
Makefile	arm64: link with -z norelro regardless of CONFIG_RELOCATABLE	2020-11-05 11:06:51 +01:00