cifs: Check for existing directory when opening file with O_CREAT

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When opening a file with O_CREAT flag, check to see if the file opened
is an existing directory.

This prevents the directory from being opened which subsequently causes
a crash when the close function for directories cifs_closedir() is called
which frees up the file->private_data memory while the file is still
listed on the open file list for the tcon.

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
CC: Stable <stable@vger.kernel.org>
Reported-by: Xiaoli Feng <xifeng@redhat.com>

...

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Sachin Prabhu 2016-07-07 21:28:27 +01:00 • committed by Steve French

parent 5b23c97d7e

commit 8d9535b6ef

1 changed files with 21 additions and 3 deletions

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24

fs/cifs/dir.c

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