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| author | Jason Xing <[email protected]> | 2025-02-20 07:29:32 +0000 |
|---|---|---|
| committer | Martin KaFai Lau <[email protected]> | 2025-02-20 22:29:10 +0000 |
| commit | 2958624b25305142e24203165ff65409ba9dd9d7 (patch) | |
| tree | 5d1bb28eae490c7f297b47f3c7f7056a47b2871f /net/core/dev.c | |
| parent | bpf: Prevent unsafe access to the sock fields in the BPF timestamping callback (diff) | |
| download | kernel-2958624b25305142e24203165ff65409ba9dd9d7.tar.gz kernel-2958624b25305142e24203165ff65409ba9dd9d7.zip | |
bpf: Disable unsafe helpers in TX timestamping callbacks
New TX timestamping sock_ops callbacks will be added in the
subsequent patch. Some of the existing BPF helpers will not
be safe to be used in the TX timestamping callbacks.
The bpf_sock_ops_setsockopt, bpf_sock_ops_getsockopt, and
bpf_sock_ops_cb_flags_set require owning the sock lock. TX
timestamping callbacks will not own the lock.
The bpf_sock_ops_load_hdr_opt needs the skb->data pointing
to the TCP header. This will not be true in the TX timestamping
callbacks.
At the beginning of these helpers, this patch checks the
bpf_sock->op to ensure these helpers are used by the existing
sock_ops callbacks only.
Signed-off-by: Jason Xing <[email protected]>
Signed-off-by: Martin KaFai Lau <[email protected]>
Link: https://patch.msgid.link/[email protected]
Diffstat (limited to 'net/core/dev.c')
0 files changed, 0 insertions, 0 deletions