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zfs: fix a panic after failed mount

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r338927("zfs: depessimize zfs_root with rmlocks") failed to error check
the mount before caching root vnode.

Results in crashes in rrw_enter_read_impl tracing back to zfs_mount.

Reported by:	Mike Tancsa
Tested by:	allanjude
Approved by:	re (kib)
This commit is contained in:
Mateusz Guzik 2018-10-14 16:14:01 +00:00
parent adf93b56dc
commit bca84f54ce
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=339355
1 changed files with 2 additions and 1 deletions
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3
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
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@ -1929,7 +1929,8 @@ zfs_mount(vfs_t *vfsp)
error = zfs_domount(vfsp, osname);
PICKUP_GIANT();
zfs_root_setvnode((zfsvfs_t *)vfsp->vfs_data);
if (error == 0)
zfs_root_setvnode((zfsvfs_t *)vfsp->vfs_data);
#ifdef illumos
/*