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| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2021-03-29 17:13:50 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2021-03-29 17:13:50 +0200 |
| commit | 4a83ce37c649dbcfb5a87c022aad626226904363 (patch) | |
| tree | 5dc21903c3218cb0755ff837127313c53157fa89 | |
| parent | 9e1d26893f8a92c32f3486883c46e8cdfff03e98 (diff) | |
| download | plan9front-4a83ce37c649dbcfb5a87c022aad626226904363.tar.xz | |
libsunrpc: work around arm64 compiler bug in sunStringUnpack()
The sunStringUnpack() routine was miscompiled by 7c, as
pointer arithmetic is done in 64 bit but the constant -1
offset got expended to a unsigned 32 bit integer.
| -rw-r--r-- | sys/src/libsunrpc/rpc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/src/libsunrpc/rpc.c b/sys/src/libsunrpc/rpc.c index 657e04233..ee075c57c 100644 --- a/sys/src/libsunrpc/rpc.c +++ b/sys/src/libsunrpc/rpc.c @@ -428,8 +428,9 @@ sunStringUnpack(uchar *a, uchar *ea, uchar **pa, char **s, u32int max) goto Err; /* slide string down over length to make room for NUL */ memmove(dat-1, dat, n); - dat[-1+n] = 0; - *s = (char*)(dat-1); + dat--; + dat[n] = 0; + *s = (char*)dat; return 0; Err: return -1; |