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authorloli10K <[email protected]>2019-09-16 19:46:59 +0200
committerBrian Behlendorf <[email protected]>2019-09-16 10:46:59 -0700
commitfcd37b622b9fb3a9673b483c59fb2d1a8c368177 (patch)
tree5c784151ff4b3b451298a5bc6f48d6bdc863089d
parentb24771a8c9e4752456a2db69476388fb45a3f751 (diff)
Device removal of indirect vdev panics the kernel
This commit fixes a NULL pointer dereference triggered in spa_vdev_remove_top_check() by trying to "zpool remove" an indirect vdev. Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #9327
-rw-r--r--module/zfs/vdev_removal.c4
-rw-r--r--tests/runfiles/linux.run3
-rw-r--r--tests/zfs-tests/tests/functional/removal/Makefile.am2
-rwxr-xr-xtests/zfs-tests/tests/functional/removal/remove_indirect.ksh58
4 files changed, 65 insertions, 2 deletions
diff --git a/module/zfs/vdev_removal.c b/module/zfs/vdev_removal.c
index 4ce7b559e..549087163 100644
--- a/module/zfs/vdev_removal.c
+++ b/module/zfs/vdev_removal.c
@@ -22,6 +22,7 @@
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011, 2019 by Delphix. All rights reserved.
+ * Copyright (c) 2019, loli10K <[email protected]>. All rights reserved.
*/
#include <sys/zfs_context.h>
@@ -1964,6 +1965,9 @@ spa_vdev_remove_top_check(vdev_t *vd)
if (vd != vd->vdev_top)
return (SET_ERROR(ENOTSUP));
+ if (!vdev_is_concrete(vd))
+ return (SET_ERROR(ENOTSUP));
+
if (!spa_feature_is_enabled(spa, SPA_FEATURE_DEVICE_REMOVAL))
return (SET_ERROR(ENOTSUP));
diff --git a/tests/runfiles/linux.run b/tests/runfiles/linux.run
index 6f015b3b3..3e39c165e 100644
--- a/tests/runfiles/linux.run
+++ b/tests/runfiles/linux.run
@@ -794,7 +794,8 @@ tests = ['removal_all_vdev', 'removal_cancel', 'removal_check_space',
'removal_with_remove', 'removal_with_scrub', 'removal_with_send',
'removal_with_send_recv', 'removal_with_snapshot',
'removal_with_write', 'removal_with_zdb', 'remove_expanded',
- 'remove_mirror', 'remove_mirror_sanity', 'remove_raidz']
+ 'remove_mirror', 'remove_mirror_sanity', 'remove_raidz',
+ 'remove_indirect']
tags = ['functional', 'removal']
[tests/functional/rename_dirs]
diff --git a/tests/zfs-tests/tests/functional/removal/Makefile.am b/tests/zfs-tests/tests/functional/removal/Makefile.am
index 686f690e2..4cc773463 100644
--- a/tests/zfs-tests/tests/functional/removal/Makefile.am
+++ b/tests/zfs-tests/tests/functional/removal/Makefile.am
@@ -29,7 +29,7 @@ dist_pkgdata_SCRIPTS = \
removal_with_send.ksh removal_with_send_recv.ksh \
removal_with_snapshot.ksh removal_with_write.ksh \
removal_with_zdb.ksh remove_mirror.ksh remove_mirror_sanity.ksh \
- remove_raidz.ksh remove_expanded.ksh
+ remove_raidz.ksh remove_expanded.ksh remove_indirect.ksh
dist_pkgdata_DATA = \
removal.kshlib
diff --git a/tests/zfs-tests/tests/functional/removal/remove_indirect.ksh b/tests/zfs-tests/tests/functional/removal/remove_indirect.ksh
new file mode 100755
index 000000000..c4ba0d9ac
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/removal/remove_indirect.ksh
@@ -0,0 +1,58 @@
+#!/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source. A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright 2019, loli10K <[email protected]>. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/removal/removal.kshlib
+
+#
+# DESCRIPTION:
+# Device removal cannot remove non-concrete vdevs
+#
+# STRATEGY:
+# 1. Create a pool with removable devices
+# 2. Remove a top-level device
+# 3. Verify we can't remove the "indirect" vdev created by the first removal
+#
+
+verify_runnable "global"
+
+function cleanup
+{
+ destroy_pool $TESTPOOL
+ log_must rm -f $TEST_BASE_DIR/device-{1,2,3}
+}
+
+log_assert "Device removal should not be able to remove non-concrete vdevs"
+log_onexit cleanup
+
+# 1. Create a pool with removable devices
+truncate -s $MINVDEVSIZE $TEST_BASE_DIR/device-{1,2,3}
+zpool create $TESTPOOL $TEST_BASE_DIR/device-{1,2,3}
+
+# 2. Remove a top-level device
+log_must zpool remove $TESTPOOL $TEST_BASE_DIR/device-1
+log_must wait_for_removal $TESTPOOL
+
+# 3. Verify we can't remove the "indirect" vdev created by the first removal
+INDIRECT_VDEV=$(zpool list -v -g $TESTPOOL | awk '{if ($2 == "-") { print $1; exit} }')
+log_must test -n "$INDIRECT_VDEV"
+log_mustnot zpool remove $TESTPOOL $INDIRECT_VDEV
+
+log_pass "Device removal cannot remove non-concrete vdevs"