Messages in this thread | | | Date | Tue, 16 Feb 1999 00:07:50 -0800 (PST) | From | a sun <> | Subject | triggered 2.2.1 kernel panic in ppp |
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hi all,
i was finally able to trigger a ppp bug that's plagued me sporadically and inconsistently. it turns out the following is happening (which explains the difficulty in repeating it): 1) linux gets a vj compressed packet 2) it calls rcv_proto_vjc_comp() (line 2050 in ppp.c) 3) for certain packets, slhc_uncompress() returns an uncompressed frame < compressed one. as a result, skb->len > new_count + PPP_HDRLEN (by 7 bytes) 4) pow! skb_put() dies horribly.
before i stick in the obvious patch, i just want to make sure that it's valid to have uncompressed packets smaller than the corresponding compressed ones.
-a asun@u.washington.edu
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