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| author | Eric Biggers <ebiggers@google.com> | 2016-12-30 17:42:32 -0600 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2017-01-16 15:01:11 +0530 |
| commit | ab53926305170c84f6531562a99490188af79485 (patch) | |
| tree | 0b4e84ce6d0571b3a6ca85de634d88a68f84bc66 /fs/fs_struct.c | |
| parent | 536bf705c5fdd96dde09978935dfbedd5bef8898 (diff) | |
net: socket: don't set sk_uid to garbage value in ->setattr()
->setattr() was recently implemented for socket files to sync the socket
inode's uid to the new 'sk_uid' member of struct sock. It does this by
copying over the ia_uid member of struct iattr. However, ia_uid is
actually only valid when ATTR_UID is set in ia_valid, indicating that
the uid is being changed, e.g. by chown. Other metadata operations such
as chmod or utimes leave ia_uid uninitialized. Therefore, sk_uid could
be set to a "garbage" value from the stack.
Fix this by only copying the uid over when ATTR_UID is set.
[cherry-pick of net e1a3a60a2ebe991605acb14cd58e39c0545e174e]
Bug: 16355602
Change-Id: I20e53848e54282b72a388ce12bfa88da5e3e9efe
Fixes: 86741ec25462 ("net: core: Add a UID field to struct sock.")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Tested-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/fs_struct.c')
0 files changed, 0 insertions, 0 deletions