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T: validate input data a bit more

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When data is generated by "normal" T tracers, it should be fine.
But it might come from unknown sources and then content might be
"strange". So let's validate input data a bit more.
This commit is contained in:
Cedric Roux
2025-06-02 11:19:23 +02:00
parent 2fa337d853
commit 7a77ee2f43
3 changed files with 24 additions and 1 deletions
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common/utils/T/tracer/multi.c
+2
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@@ -123,10 +123,12 @@ int read_tracee(int s, OBUF *ebuf, int *_type, int32_t *_length)
memcpy(v+vpos, &length, 4);
vpos += 4;
#ifdef T_SEND_TIME
if (length < sizeof(struct timespec)) return -1;
if (fullread(s,v+vpos,sizeof(struct timespec))==-1) return -1;
vpos += sizeof(struct timespec);
length -= sizeof(struct timespec);
#endif
if (length < sizeof(int)) return -1;
if (fullread(s, &type, sizeof(int)) == -1) return -1;
memcpy(v+vpos, &type, sizeof(int));
vpos += sizeof(int);