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Merge tag '9p-for-6.7-rc7' of https://github.com/martinetd/linux

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Pull 9p fixes from Dominique Martinet:
 "Two small fixes scheduled for stable trees:

  A tracepoint fix that's been reading past the end of messages forever,
  but semi-recently also went over the end of the buffer. And a
  potential incorrectly freeing garbage in pdu parsing error path"

* tag '9p-for-6.7-rc7' of https://github.com/martinetd/linux:
  net: 9p: avoid freeing uninit memory in p9pdu_vreadf
  9p: prevent read overrun in protocol dump tracepoint
This commit is contained in:
Linus Torvalds
2023-12-22 07:50:34 -08:00
parent 24e0d2e527 ff49bf1867
commit 93a165cb9a
2 changed files with 20 additions and 8 deletions
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11
include/trace/events/9p.h
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@@ -178,18 +178,21 @@ TRACE_EVENT(9p_protocol_dump,
__field( void *, clnt )
__field( __u8, type )
__field( __u16, tag )
__array( unsigned char, line, P9_PROTO_DUMP_SZ )
__dynamic_array(unsigned char, line,
min_t(size_t, pdu->capacity, P9_PROTO_DUMP_SZ))
),
TP_fast_assign(
__entry->clnt = clnt;
__entry->type = pdu->id;
__entry->tag = pdu->tag;
memcpy(__entry->line, pdu->sdata, P9_PROTO_DUMP_SZ);
memcpy(__get_dynamic_array(line), pdu->sdata,
__get_dynamic_array_len(line));
),
TP_printk("clnt %lu %s(tag = %d)\n%.3x: %16ph\n%.3x: %16ph\n",
TP_printk("clnt %lu %s(tag = %d)\n%*ph\n",
(unsigned long)__entry->clnt, show_9p_op(__entry->type),
__entry->tag, 0, __entry->line, 16, __entry->line + 16)
__entry->tag, __get_dynamic_array_len(line),
__get_dynamic_array(line))
);