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| author | Andrii Nakryiko <andriin@fb.com> | 2020-06-16 08:04:30 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-06-17 18:50:02 +0300 |
| commit | 02553b91da5deb63c8562b47529b09b734659af0 (patch) | |
| tree | 82b0bdb70f7daa8660d243a98a1e893b4b08767c /tools/bpf/bpftool | |
| parent | 6903cdae9f9f08d61e49c16cbef11c293e33a615 (diff) | |
| download | linux-02553b91da5deb63c8562b47529b09b734659af0.tar.xz | |
bpf: bpf_probe_read_kernel_str() has to return amount of data read on success
During recent refactorings, bpf_probe_read_kernel_str() started returning 0 on
success, instead of amount of data successfully read. This majorly breaks
applications relying on bpf_probe_read_kernel_str() and bpf_probe_read_str()
and their results. Fix this by returning actual number of bytes read.
Fixes: 8d92db5c04d1 ("bpf: rework the compat kernel probe handling")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200616050432.1902042-1-andriin@fb.com
Diffstat (limited to 'tools/bpf/bpftool')
0 files changed, 0 insertions, 0 deletions