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linux_dsm_epyc7002/arch/x86/kernel/kprobes
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Masami Hiramatsu 50cf9c6ca2 x86/kprobes: Restore BTF if the single-stepping is cancelled 
[ Upstream commit 78ff2733ff352175eb7f4418a34654346e1b6cd2 ]

Fix to restore BTF if single-stepping causes a page fault and
it is cancelled.

Usually the BTF flag was restored when the single stepping is done
(in resume_execution()). However, if a page fault happens on the
single stepping instruction, the fault handler is invoked and
the single stepping is cancelled. Thus, the BTF flag is not
restored.

Fixes: 1ecc798c67 ("x86: debugctlmsr kprobes")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/160389546985.106936.12727996109376240993.stgit@devnote2
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-12-30 11:53:45 +01:00
..
common.h x86/stackframe/32: Provide consistent pt_regs 2019-06-25 10:23:47 +02:00
core.c x86/kprobes: Restore BTF if the single-stepping is cancelled 2020-12-30 11:53:45 +01:00
ftrace.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
opt.c x86/kprobes: Fix optprobe to detect INT3 padding correctly 2020-12-12 15:25:17 +01:00