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| author |   Loris Reiff <loris.reiff@liblor.ch> | 2021-01-22 17:42:31 +0100 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2021-01-22 23:11:34 +0100 |
| commit | bb8b81e396f7afbe7c50d789e2107512274d2a35 (patch) | |
| tree | cd23fb2afd862ab950fe23fb80ba8cc20ed37cb7 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec (diff) | |
| download | wireguard-linux-bb8b81e396f7afbe7c50d789e2107512274d2a35.tar.xz wireguard-linux-bb8b81e396f7afbe7c50d789e2107512274d2a35.zip | |
bpf, cgroup: Fix optlen WARN_ON_ONCE toctou
A toctou issue in `__cgroup_bpf_run_filter_getsockopt` can trigger a
WARN_ON_ONCE in a check of `copy_from_user`.
`*optlen` is checked to be non-negative in the individual getsockopt
functions beforehand. Changing `*optlen` in a race to a negative value
will result in a `copy_from_user(ctx.optval, optval, ctx.optlen)` with
`ctx.optlen` being a negative integer.
Fixes: 0d01da6afc54 ("bpf: implement getsockopt and setsockopt hooks")
Signed-off-by: Loris Reiff <loris.reiff@liblor.ch>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20210122164232.61770-1-loris.reiff@liblor.ch
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions