Tomislav Novak 4180b3ad76 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 11:14:19 +02:00
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alpha	Kbuild fixes for v6.5 (2nd)	2023-08-13 08:56:24 -07:00
arc	ARC: atomics: Add compiler barrier to atomic operations...	2023-09-19 12:30:22 +02:00
arm	hw_breakpoint: fix single-stepping when using bpf_overflow_handler	2023-09-23 11:14:19 +02:00
arm64	hw_breakpoint: fix single-stepping when using bpf_overflow_handler	2023-09-23 11:14:19 +02:00
csky
hexagon
ia64	locking: remove spin_lock_prefetch	2023-08-12 09:18:47 -07:00
loongarch	LoongArch: mm: Add p?d_leaf() definitions	2023-09-13 09:53:52 +02:00
m68k	m68k: Fix invalid .section syntax	2023-07-24 14:50:02 +02:00
microblaze
mips	MIPS: Fix CONFIG_CPU_DADDI_WORKAROUNDS `modules_install' regression	2023-09-19 12:30:26 +02:00
nios2
openrisc
parisc	parisc: sba_iommu: Fix build warning if procfs if disabled	2023-09-19 12:30:27 +02:00
powerpc	powerpc/ftrace: Fix dropping weak symbols with older toolchains	2023-09-13 09:53:52 +02:00
riscv	RISC-V: Add ptrace support for vectors	2023-09-13 09:53:55 +02:00
s390	s390/boot: cleanup number of page table levels setup	2023-09-23 11:14:18 +02:00
sh	sh: push-switch: Reorder cleanup operations to avoid use-after-free bug	2023-09-19 12:30:21 +02:00
sparc	nmi_backtrace: allow excluding an arbitrary CPU	2023-09-13 09:53:08 +02:00
um	um: virt-pci: fix missing declaration warning	2023-09-13 09:53:48 +02:00
x86	x86/amd_nb: Add PCI IDs for AMD Family 1Ah-based models	2023-09-23 11:14:18 +02:00
xtensa	xtensa: PMU: fix base address for the newer hardware	2023-09-13 09:53:51 +02:00
.gitignore
Kconfig