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| author | Kees Cook <keescook@chromium.org> | 2024-02-16 15:27:44 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-02-19 10:58:24 +0000 |
| commit | 1e63e5a813fa6203d7430af51d6bffb728525015 (patch) | |
| tree | 9b2f81133ae9e0844a65f6bc71d03a8b7db7e35b /net/sched | |
| parent | da4a154ca262eec77b0a07ba1a2a00c91b2b7677 (diff) | |
| download | linux-1e63e5a813fa6203d7430af51d6bffb728525015.tar.gz | |
net: sched: Annotate struct tc_pedit with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct tc_pedit.
Additionally, since the element count member must be set before accessing
the annotated flexible array member, move its initialization earlier.
Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/act_pedit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/act_pedit.c b/net/sched/act_pedit.c index df5a02d5f919c..fc0a35a7b62ac 100644 --- a/net/sched/act_pedit.c +++ b/net/sched/act_pedit.c @@ -515,11 +515,11 @@ static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a, spin_unlock_bh(&p->tcf_lock); return -ENOBUFS; } + opt->nkeys = parms->tcfp_nkeys; memcpy(opt->keys, parms->tcfp_keys, flex_array_size(opt, keys, parms->tcfp_nkeys)); opt->index = p->tcf_index; - opt->nkeys = parms->tcfp_nkeys; opt->flags = parms->tcfp_flags; opt->action = p->tcf_action; opt->refcnt = refcount_read(&p->tcf_refcnt) - ref; |