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| author |   Florian Westphal <fw@strlen.de> | 2020-02-06 00:39:37 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-02-06 11:25:09 +0100 |
| commit | b0519de8b3f1caf10632aca55def999ec2d2f1bc (patch) | |
| tree | b95ccc010e7691b0715d76e2b9f74e4489876894 /drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c | |
| parent | qed: Fix timestamping issue for L2 unicast ptp packets. (diff) | |
| download | linux-dev-b0519de8b3f1caf10632aca55def999ec2d2f1bc.tar.xz linux-dev-b0519de8b3f1caf10632aca55def999ec2d2f1bc.zip | |
mptcp: fix use-after-free for ipv6
Turns out that when we accept a new subflow, the newly created
inet_sk(tcp_sk)->pinet6 points at the ipv6_pinfo structure of the
listener socket.
This wasn't caught by the selftest because it closes the accepted fd
before the listening one.
adding a close(listenfd) after accept returns is enough:
BUG: KASAN: use-after-free in inet6_getname+0x6ba/0x790
Read of size 1 at addr ffff88810e310866 by task mptcp_connect/2518
Call Trace:
inet6_getname+0x6ba/0x790
__sys_getpeername+0x10b/0x250
__x64_sys_getpeername+0x6f/0xb0
also alter test program to exercise this.
Reported-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions