Messages in this thread | | | From | Masami Hiramatsu <> | Subject | [PATCH v2 0/4] arm64: kprobes: Update blacklist checking on arm64 | Date | Tue, 15 Jan 2019 15:23:39 +0900 |
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Hello,
Here is the v2 series of update of the kprobe blacklist checking on arm64.
I found that some blacklist checking code were mis-placed in arch_prepare_kprobe() and arch_within_kprobe_blacklist(). Since the blacklist just filters by symbol, smaller than the symbol, like extable must be checked in arch_prepare_kprobe(). Also, all function (symbol) level check must be done by blacklist.
For arm64, it checks the extable entry address in blacklist and exception/irqentry function in arch_prepare_kprobe(). And, RODATA check is unneeded since kernel/kprobes.c already ensures the probe address is in kernel-text area.
In v2, I updated [1/4]'s description and added James' Reviewed-by. Also, in this version, I added a patch which uses arch_populate_kprobe_blacklist() instead of arch_within_kprobe_blacklist() so that user can see the full list of blacklisted symbols under the debugfs.
Changes in v2: - [1/4] change description so that it make clear and add James' Reviewed-by. - [4/4] new patch.
Thank you,
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Masami Hiramatsu (4): arm64: kprobes: Move extable address check into arch_prepare_kprobe() arm64: kprobes: Remove unneeded RODATA check arm64: kprobes: Move exception_text check in blacklist arm64: kprobes: Use arch_populate_kprobe_blacklist()
arch/arm64/kernel/probes/kprobes.c | 49 ++++++++++++++++++------------------ 1 file changed, 24 insertions(+), 25 deletions(-)
-- Masami Hiramatsu (Linaro) <mhiramat@kernel.org>
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