[PATCH v3 0/4] arm64: kprobes: Update blacklist checking on arm64
From: Masami Hiramatsu
Date: Tue Feb 12 2019 - 10:43:20 EST
Here is the v3 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 v3, I rebased on the latest arm64 kernel which includes
James' KVM/HYP fixes for kprobes, and fix a reported bugs
Changes in v3:
- [4/4] Fixes to remove redundant blacklist of kprobe_text
and add blacklist on exception_text.
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 | 52 +++++++++++++++++++-----------------
1 file changed, 27 insertions(+), 25 deletions(-)
Masami Hiramatsu (Linaro) <mhiramat@xxxxxxxxxx>