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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
commit8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be (patch)
treee9891aa6c295060d065adffd610c4f49ecf884f3 /fs/nfs/blocklayout/dev.c
parenta71852147516bc1cb5b0b3cbd13639bfd4022dc8 (diff)
Linux-libre 4.3.2-gnu
Diffstat (limited to 'fs/nfs/blocklayout/dev.c')
-rw-r--r--fs/nfs/blocklayout/dev.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c
index e535599a0..a861bbdfe 100644
--- a/fs/nfs/blocklayout/dev.c
+++ b/fs/nfs/blocklayout/dev.c
@@ -22,7 +22,7 @@ bl_free_device(struct pnfs_block_dev *dev)
kfree(dev->children);
} else {
if (dev->bdev)
- blkdev_put(dev->bdev, FMODE_READ);
+ blkdev_put(dev->bdev, FMODE_READ | FMODE_WRITE);
}
}
@@ -65,6 +65,11 @@ nfs4_block_decode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b)
return -EIO;
p = xdr_decode_hyper(p, &b->simple.sigs[i].offset);
b->simple.sigs[i].sig_len = be32_to_cpup(p++);
+ if (b->simple.sigs[i].sig_len > PNFS_BLOCK_UUID_LEN) {
+ pr_info("signature too long: %d\n",
+ b->simple.sigs[i].sig_len);
+ return -EIO;
+ }
p = xdr_inline_decode(xdr, b->simple.sigs[i].sig_len);
if (!p)
@@ -195,7 +200,7 @@ bl_parse_simple(struct nfs_server *server, struct pnfs_block_dev *d,
if (!dev)
return -EIO;
- d->bdev = blkdev_get_by_dev(dev, FMODE_READ, NULL);
+ d->bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_WRITE, NULL);
if (IS_ERR(d->bdev)) {
printk(KERN_WARNING "pNFS: failed to open device %d:%d (%ld)\n",
MAJOR(dev), MINOR(dev), PTR_ERR(d->bdev));