Fabian Vogt d694f809df riscv: kprobes: Fix probe address validation ...

[ Upstream commit 9e68bd803f ]

When adding a kprobe such as "p:probe/tcp_sendmsg _text+15392192",
arch_check_kprobe would start iterating all instructions starting from
_text until the probed address. Not only is this very inefficient, but
literal values in there (e.g. left by function patching) are
misinterpreted in a way that causes a desync.

Fix this by doing it like x86: start the iteration at the closest
preceding symbol instead of the given starting point.

Fixes: 87f48c7ccc ("riscv: kprobe: Fixup kernel panic when probing an illegal position")
Signed-off-by: Fabian Vogt <fvogt@suse.de>
Signed-off-by: Marvin Friedrich <marvin.friedrich@suse.com>
Acked-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/6191817.lOV4Wx5bFT@fvogt-thinkpad
Signed-off-by: Paul Walmsley <pjw@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-10-23 16:20:32 +02:00

..

decode-insn.c

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decode-insn.h

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kprobes.c

riscv: kprobes: Fix probe address validation

2025-10-23 16:20:32 +02:00

Makefile

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rethook_trampoline.S

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rethook.c

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rethook.h

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simulate-insn.c

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simulate-insn.h

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uprobes.c

riscv: uprobes: Add missing fence.i after building the XOL buffer

2025-05-02 07:59:04 +02:00