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Jiri Olsa 2617ae62f0 uprobe: Do not emulate/sstep original instruction when ip is changed 
[ Upstream commit 4363264111 ]

If uprobe handler changes instruction pointer we still execute single
step) or emulate the original instruction and increment the (new) ip
with its length.

This makes the new instruction pointer bogus and application will
likely crash on illegal instruction execution.

If user decided to take execution elsewhere, it makes little sense
to execute the original instruction, so let's skip it.

Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20250916215301.664963-3-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-12-07 06:09:17 +09:00
..
callchain.c uaccess: add force_uaccess_{begin,end} helpers 2020-08-12 10:57:59 -07:00
core.c perf/core: Prevent VMA split of buffer mappings 2025-08-28 16:24:14 +02:00
hw_breakpoint.c perf/hw_breakpoint: Replace deprecated CPU-hotplug functions 2021-08-26 09:14:36 +02:00
internal.h perf/aux: Fix AUX buffer serialization 2024-09-12 11:07:51 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ring_buffer.c perf/ring_buffer: Allow the EPOLLRDNORM flag for poll 2025-04-10 14:31:57 +02:00
uprobes.c uprobe: Do not emulate/sstep original instruction when ip is changed 2025-12-07 06:09:17 +09:00