Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Add bpf_prog_run_data_pointers() syzbot found that cls_bpf_classify() is able to change tc_skb_cb(skb)->drop_reason triggering a warning in sk_skb_reason_drop(). WARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 __sk_skb_reason_drop net/core/skbuff.c:1189 [inline] WARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 sk_skb_reason_drop+0x76/0x170 net/core/skbuff.c:1214 struct tc_skb_cb has been added in commit ec624fe740b4 ("net/sched: Extend qdisc control block with tc control block"), which added a wrong interaction with db58ba459202 ("bpf: wire in data and data_end for cls_act_bpf"). drop_reason was added later. Add bpf_prog_run_data_pointers() helper to save/restore the net_sched storage colliding with BPF data_meta/data_end.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0d76daf2013ce1da20eab5e26bd81d983e1c18fb before c4cdd143c35974a2cedd000fa9eb3accc3023b20; affected ec624fe740b416fb68d536b37fb8eef46f90b5c2 before 5e149d8a8e732126fb6014efd60075cf63a73f91; affected ec624fe740b416fb68d536b37fb8eef46f90b5c2 before baa61dcaa50b7141048c8d2aede7fe9ed8f21d11; affected ec624fe740b416fb68d536b37fb8eef46f90b5c2 before 6392e5f4b1a3cce10e828309baf35d22abd3457d; affected ec624fe740b416fb68d536b37fb8eef46f90b5c2 before 8dd2fe5f5d586c8e87307b7a271f6b994afcc006; affected ec624fe740b416fb68d536b37fb8eef46f90b5c2 before 4ef92743625818932b9c320152b58274c05e5053; affected 5.15.13 before 5.15.197 |
| Linux / Linux | affected 5.16; unaffected 0 before 5.16; unaffected 5.15.197 through 5.15.*; unaffected 6.1.159 through 6.1.*; unaffected 6.6.117 through 6.6.*; unaffected 6.12.59 through 6.12.*; unaffected 6.17.9 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c4cdd143c35974a2cedd000fa9eb3accc3023b20
- https://git.kernel.org/stable/c/5e149d8a8e732126fb6014efd60075cf63a73f91
- https://git.kernel.org/stable/c/baa61dcaa50b7141048c8d2aede7fe9ed8f21d11
- https://git.kernel.org/stable/c/6392e5f4b1a3cce10e828309baf35d22abd3457d
- https://git.kernel.org/stable/c/8dd2fe5f5d586c8e87307b7a271f6b994afcc006
- https://git.kernel.org/stable/c/4ef92743625818932b9c320152b58274c05e5053