diff options
| author | Kevin Krakauer <krakauer@google.com> | 2020-08-28 10:33:44 -0700 |
|---|---|---|
| committer | Andrei Vagin <avagin@gmail.com> | 2020-09-09 17:53:10 -0700 |
| commit | c9842f21ce4a9308dba983fd712cc688b26237d5 (patch) | |
| tree | ebcf4fe8c2da048265384af2f063d808576667c5 /pkg | |
| parent | e50be6f7bab47c271e718dabae027c9c3590e4b9 (diff) | |
fix panic when calling SO_ORIGINAL_DST without initializing iptables
Reported-by: syzbot+074ec22c42305725b79f@syzkaller.appspotmail.com
PiperOrigin-RevId: 328963899
Diffstat (limited to 'pkg')
| -rw-r--r-- | pkg/tcpip/stack/iptables.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/pkg/tcpip/stack/iptables.go b/pkg/tcpip/stack/iptables.go index 30aa41db2..0e33cbe92 100644 --- a/pkg/tcpip/stack/iptables.go +++ b/pkg/tcpip/stack/iptables.go @@ -427,5 +427,10 @@ func (it *IPTables) checkRule(hook Hook, pkt *PacketBuffer, table Table, ruleIdx // OriginalDst returns the original destination of redirected connections. It // returns an error if the connection doesn't exist or isn't redirected. func (it *IPTables) OriginalDst(epID TransportEndpointID) (tcpip.Address, uint16, *tcpip.Error) { + it.mu.RLock() + defer it.mu.RUnlock() + if !it.modified { + return "", 0, tcpip.ErrNotConnected + } return it.connections.originalDst(epID) } |