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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2019-03-30 10:21:07 +0900 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-04-11 15:23:48 -0400 |
| commit | 7c2bd9a39845bfb6d72ddb55ce737650271f6f96 (patch) | |
| tree | 1418f0b2012665a16921443a17856c53ee3eb18b /fs/stack.c | |
| parent | 582549e3fbe137eb6ce9be591aca25c2222a36b4 (diff) | |
NFS: Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family.
syzbot is reporting uninitialized value at rpc_sockaddr2uaddr() [1]. This
is because syzbot is setting AF_INET6 to "struct sockaddr_in"->sin_family
(which is embedded into user-visible "struct nfs_mount_data" structure)
despite nfs23_validate_mount_data() cannot pass sizeof(struct sockaddr_in6)
bytes of AF_INET6 address to rpc_sockaddr2uaddr().
Since "struct nfs_mount_data" structure is user-visible, we can't change
"struct nfs_mount_data" to use "struct sockaddr_storage". Therefore,
assuming that everybody is using AF_INET family when passing address via
"struct nfs_mount_data"->addr, reject if its sin_family is not AF_INET.
[1] https://syzkaller.appspot.com/bug?id=599993614e7cbbf66bc2656a919ab2a95fb5d75c
Reported-by: syzbot <syzbot+047a11c361b872896a4f@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/stack.c')
0 files changed, 0 insertions, 0 deletions