bpf: Guard __get_user acesss with access_ok for uprobe_multi data

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As reported by sashiko [1] we need to use access_ok to check the user
space data bounds before we use __get-user to get it.

[1] https://lore.kernel.org/bpf/20260610145235.CB1441F00893@smtp.kernel.org/
Fixes: 0b779b61f6 ("bpf: Add cookies support for uprobe_multi link")
Fixes: 89ae89f53d ("bpf: Add multi uprobe link")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260611114230.950379-2-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Jiri Olsa 2026-06-11 13:42:24 +02:00 • committed by Alexei Starovoitov

parent 16deef8de0

commit 4d87a251d4

1 changed files with 11 additions and 0 deletions

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kernel/trace/bpf_trace.c

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