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| author | Jiri Olsa <jolsa@kernel.org> | 2022-06-15 13:21:17 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-06-17 04:42:21 +0200 |
| commit | eb5fb0325698d05f0bf78d322de82c451a3685a2 (patch) | |
| tree | c0f26fc64a8678d3317c0d88c55f1aa1e746afcc /tools | |
| parent | ftrace: Keep address offset in ftrace_lookup_symbols (diff) | |
| download | linux-eb5fb0325698d05f0bf78d322de82c451a3685a2.tar.xz linux-eb5fb0325698d05f0bf78d322de82c451a3685a2.zip | |
bpf: Force cookies array to follow symbols sorting
When user specifies symbols and cookies for kprobe_multi link
interface it's very likely the cookies will be misplaced and
returned to wrong functions (via get_attach_cookie helper).
The reason is that to resolve the provided functions we sort
them before passing them to ftrace_lookup_symbols, but we do
not do the same sort on the cookie values.
Fixing this by using sort_r function with custom swap callback
that swaps cookie values as well.
Fixes: 0236fec57a15 ("bpf: Resolve symbols with ftrace_lookup_symbols for kprobe multi link")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20220615112118.497303-4-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions