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| author | rsc <devnull@localhost> | 2006-05-04 19:10:11 +0000 |
|---|---|---|
| committer | rsc <devnull@localhost> | 2006-05-04 19:10:11 +0000 |
| commit | f2466297885cfdd3424033139d5aa14065791b84 (patch) | |
| tree | 080cbbe11c46829a50ff58a0fd13ccc49cec68b8 /src/cmd/9pserve.c | |
| parent | 1e22e8e41463896755b37d45bf76e14683e30f94 (diff) | |
| download | plan9port-f2466297885cfdd3424033139d5aa14065791b84.tar.gz plan9port-f2466297885cfdd3424033139d5aa14065791b84.tar.bz2 plan9port-f2466297885cfdd3424033139d5aa14065791b84.zip | |
paranoia about extension
Diffstat (limited to 'src/cmd/9pserve.c')
| -rw-r--r-- | src/cmd/9pserve.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/cmd/9pserve.c b/src/cmd/9pserve.c index 623b966a..3693164b 100644 --- a/src/cmd/9pserve.c +++ b/src/cmd/9pserve.c @@ -10,7 +10,8 @@ enum { STACK = 32768, NHASH = 31, - MAXMSG = 64 /* per connection */ + MAXMSG = 64, /* per connection */ + MAXMSGSIZE = 4*1024*1024 }; typedef struct Hash Hash; @@ -231,6 +232,8 @@ mainproc(void *v) if(n != nn) sysfatal("error writing Tversion: %r\n"); n = read9pmsg(0, vbuf, sizeof vbuf); + if(n < 0) + sysfatal("read9pmsg failure"): if(convM2S(vbuf, n, &f) != n) sysfatal("convM2S failure"); if(f.msize < msize) @@ -1220,6 +1223,8 @@ read9ppkt(Ioproc *io, int fd) if(n != 4) return nil; n = GBIT32(buf); + if(n > MAXMSGSIZE) + return nil; pkt = emalloc(n); PBIT32(pkt, n); nn = ioreadn(io, fd, pkt+4, n-4); |