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6977619 NULL pointer deference in sa_handle_get_from_db()

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References:
  illumos/illumos-gate@44bffe012c

Ported-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1775
This commit is contained in:
Mark Shellenbaum 2010-08-18 13:59:31 -06:00 committed by Brian Behlendorf
parent c0ebc844c7
commit c1fabe7961
1 changed files with 22 additions and 8 deletions
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28
module/zfs/zfs_vfsops.c
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@ -1476,7 +1476,7 @@ EXPORT_SYMBOL(zfs_suspend_fs);
int
zfs_resume_fs(zfs_sb_t *zsb, const char *osname)
{
int err, err2;
int err;
ASSERT(RRW_WRITE_HELD(&zsb->z_teardown_lock));
ASSERT(RW_WRITE_HELD(&zsb->z_teardown_inactive_lock));
@ -1488,18 +1488,33 @@ zfs_resume_fs(zfs_sb_t *zsb, const char *osname)
znode_t *zp;
uint64_t sa_obj = 0;
err2 = zap_lookup(zsb->z_os, MASTER_NODE_OBJ,
ZFS_SA_ATTRS, 8, 1, &sa_obj);
/*
* Make sure version hasn't changed
*/
if ((err || err2) && zsb->z_version >= ZPL_VERSION_SA)
err = zfs_get_zplprop(zsb->z_os, ZFS_PROP_VERSION,
&zsb->z_version);
if (err)
goto bail;
err = zap_lookup(zsb->z_os, MASTER_NODE_OBJ,
ZFS_SA_ATTRS, 8, 1, &sa_obj);
if (err && zsb->z_version >= ZPL_VERSION_SA)
goto bail;
if ((err = sa_setup(zsb->z_os, sa_obj,
zfs_attr_table, ZPL_END, &zsb->z_attr_table)) != 0)
goto bail;
if (zsb->z_version >= ZPL_VERSION_SA)
sa_register_update_callback(zsb->z_os,
zfs_sa_upgrade);
VERIFY(zfs_sb_setup(zsb, B_FALSE) == 0);
zfs_set_fuid_feature(zsb);
zsb->z_rollback_time = jiffies;
/*
@ -1530,8 +1545,8 @@ bail:
if (err) {
/*
* Since we couldn't reopen zfs_sb_t or, setup the
* sa framework, force unmount this file system.
* Since we couldn't reopen zfs_sb_t or, or
* setup the sa framework force unmount this file system.
*/
if (zsb->z_os)
(void) zfs_umount(zsb->z_sb);
@ -1601,7 +1616,6 @@ zfs_set_version(zfs_sb_t *zsb, uint64_t newvers)
zsb->z_version = newvers;
if (zsb->z_version >= ZPL_VERSION_FUID)
zfs_set_fuid_feature(zsb);
return (0);