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| author | Miklos Szeredi <mszeredi@redhat.com> | 2019-11-12 11:49:04 +0100 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2019-11-12 11:49:04 +0100 |
| commit | 8aab336b14c115c6bf1d4baeb9247e41ed9ce6de (patch) | |
| tree | 9ef38407dc83b5ba4b04522a576c5132d872631d | |
| parent | fuse: verify attributes (diff) | |
| download | linux-8aab336b14c115c6bf1d4baeb9247e41ed9ce6de.tar.xz linux-8aab336b14c115c6bf1d4baeb9247e41ed9ce6de.zip | |
fuse: verify write return
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>
| -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 db48a5cf8620..795d0f24d8b4 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1096,6 +1096,8 @@ 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; |