diff options
| author | Miklos Szeredi <mszeredi@redhat.com> | 2019-11-12 11:49:04 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-13 08:42:31 +0100 |
| commit | 8aa5c23ef81ba86d8ddf2791cbe8db17f3d6bada (patch) | |
| tree | de9a8252d434783b49e2a4ab9b393a8356010365 /fs | |
| parent | ba916a1310661973cd9a5d0509c3f9e3fe59c0c3 (diff) | |
fuse: verify write return
commit 8aab336b14c115c6bf1d4baeb9247e41ed9ce6de upstream.
Make sure filesystem is not returning a bogus number of bytes written.
Fixes: ea9b9907b82a ("fuse: implement perform_write")
Cc: <stable@vger.kernel.org> # v2.6.26
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/fuse/file.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index a28f84b17f4d..a63d779eac10 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1098,6 +1098,8 @@ static ssize_t fuse_send_write_pages(struct fuse_io_args *ia, ia->write.in.flags = fuse_write_flags(iocb); err = fuse_simple_request(fc, &ap->args); + if (!err && ia->write.out.size > count) + err = -EIO; offset = ap->descs[0].offset; count = ia->write.out.size; |