diff options
| author | David Howells <dhowells@redhat.com> | 2022-12-24 14:49:00 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-12-28 09:59:23 +0000 |
| commit | 0e50d999903c009b6a9cd2277c82d6798d982e31 (patch) | |
| tree | 2c8c72932a63fcd1c526699b15ec3ce9ae72c85a /include/trace | |
| parent | d3805695fe1e7383517903715cefc9bbdcffdc90 (diff) | |
| download | linux-0e50d999903c009b6a9cd2277c82d6798d982e31.tar.bz2 | |
rxrpc: Fix a couple of potential use-after-frees
At the end of rxrpc_recvmsg(), if a call is found, the call is put and then
a trace line is emitted referencing that call in a couple of places - but
the call may have been deallocated by the time those traces happen.
Fix this by stashing the call debug_id in a variable and passing that to
the tracepoint rather than the call pointer.
Fixes: 849979051cbc ("rxrpc: Add a tracepoint to follow what recvmsg does")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/rxrpc.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h index c6cfed00d0c6..5f9dd7389536 100644 --- a/include/trace/events/rxrpc.h +++ b/include/trace/events/rxrpc.h @@ -1062,10 +1062,10 @@ TRACE_EVENT(rxrpc_receive, ); TRACE_EVENT(rxrpc_recvmsg, - TP_PROTO(struct rxrpc_call *call, enum rxrpc_recvmsg_trace why, + TP_PROTO(unsigned int call_debug_id, enum rxrpc_recvmsg_trace why, int ret), - TP_ARGS(call, why, ret), + TP_ARGS(call_debug_id, why, ret), TP_STRUCT__entry( __field(unsigned int, call ) @@ -1074,7 +1074,7 @@ TRACE_EVENT(rxrpc_recvmsg, ), TP_fast_assign( - __entry->call = call ? call->debug_id : 0; + __entry->call = call_debug_id; __entry->why = why; __entry->ret = ret; ), |