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unix: fix nil pointer dereference in Getdirentries on 32-bit freebsd 12

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Don't attempt to dereference basep if it's nil, just pass it to
getdirentries_freebsd12 as is.

Change-Id: I043a9ee9262e6333c35fd9ecc52694c8fd2de9f6
Reviewed-on: https://go-review.googlesource.com/c/sys/+/183223
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Yuval Pavel Zholkover <paulzhol@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Tobias Klauser
2019-06-21 20:38:18 +00:00
committed by Tobias Klauser
parent 4d873483be
commit d432491b91
1 changed files with 1 additions and 1 deletions
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unix/syscall_freebsd.go
+1 -1
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@@ -362,7 +362,7 @@ func Getdents(fd int, buf []byte) (n int, err error) {
func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
if supportsABI(_ino64First) {
if unsafe.Sizeof(*basep) == 8 {
if basep == nil || unsafe.Sizeof(*basep) == 8 {
return getdirentries_freebsd12(fd, buf, (*uint64)(unsafe.Pointer(basep)))
}
// The freebsd12 syscall needs a 64-bit base. On 32-bit machines