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[ciqlts9_4] sctp: avoid NULL dereference when chunk data buffer is missing #1017

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Merged
roxanan1996 merged 1 commit into from
Mar 26, 2026
Merged

[ciqlts9_4] sctp: avoid NULL dereference when chunk data buffer is missing #1017

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13 changes: 7 additions & 6 deletions net/sctp/inqueue.c
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Original file line number Diff line number Diff line change
Expand Up @@ -163,13 +163,14 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue)
chunk->head_skb = chunk->skb;

/* skbs with "cover letter" */
if (chunk->head_skb && chunk->skb->data_len == chunk->skb->len)
if (chunk->head_skb && chunk->skb->data_len == chunk->skb->len) {
if (WARN_ON(!skb_shinfo(chunk->skb)->frag_list)) {
__SCTP_INC_STATS(dev_net(chunk->skb->dev),
SCTP_MIB_IN_PKT_DISCARDS);
sctp_chunk_free(chunk);
goto next_chunk;
}
chunk->skb = skb_shinfo(chunk->skb)->frag_list;

if (WARN_ON(!chunk->skb)) {
__SCTP_INC_STATS(dev_net(chunk->skb->dev), SCTP_MIB_IN_PKT_DISCARDS);
sctp_chunk_free(chunk);
goto next_chunk;
}
}

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