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Fix: potential PCB buffer overflow on bsd systems (#941)

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This commit is contained in:
gVisor bot 2020-09-03 10:27:20 +08:00
parent e8603ddeb1
commit 7512851be1
2 changed files with 5 additions and 5 deletions
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4
rules/process_darwin.go
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@ -127,8 +127,8 @@ func getExecPathFromAddress(metadata *C.Metadata) (string, error) {
// rup8(sizeof(xtcpcb_n)) // rup8(sizeof(xtcpcb_n))
itemSize += 208 itemSize += 208
} }
// skip the first and last xinpgen(24 bytes) block // skip the first xinpgen(24 bytes) block
for i := 24; i < len(buf)-24; i += itemSize { for i := 24; i+itemSize <= len(buf); i += itemSize {
// offset of xinpcb_n and xsocket_n // offset of xinpcb_n and xsocket_n
inp, so := i, i+104 inp, so := i, i+104

6
rules/process_freebsd_amd64.go
View file

@ -95,7 +95,7 @@ func searchSocketPid(socket uint64) (uint32, error) {
// struct xfile // struct xfile
itemSize := 128 itemSize := 128
for i := 0; i < len(buf); i += itemSize { for i := 0; i+itemSize <= len(buf); i += itemSize {
// xfile.xf_data // xfile.xf_data
data := binary.BigEndian.Uint64(buf[i+56 : i+64]) data := binary.BigEndian.Uint64(buf[i+56 : i+64])
if data == socket { if data == socket {
@ -141,8 +141,8 @@ func getExecPathFromAddress(metadata *C.Metadata) (string, error) {
buf := []byte(value) buf := []byte(value)
// skip the first and last xinpgen(64 bytes) block // skip the first xinpgen(64 bytes) block
for i := 64; i < len(buf)-64; i += itemSize { for i := 64; i+itemSize <= len(buf); i += itemSize {
inp := i + inpOffset inp := i + inpOffset
srcPort := binary.BigEndian.Uint16(buf[inp+254 : inp+256]) srcPort := binary.BigEndian.Uint16(buf[inp+254 : inp+256])