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| author |   Josef Bacik <josef@redhat.com> | 2010-03-19 20:49:55 +0000 |
|---|---|---|
| committer |   Chris Mason <chris.mason@oracle.com> | 2010-03-30 21:19:09 -0400 |
| commit | 1b1d1f6625e517a08640ddb4b8f8a0e025243fe3 (patch) | |
| tree | d662fe7e7d9ddec1214982b3dcd955228e18562f /arch/x86/kernel/dumpstack.h | |
| parent | Btrfs: check btrfs_get_extent return for IS_ERR() (diff) | |
| download | wireguard-linux-1b1d1f6625e517a08640ddb4b8f8a0e025243fe3.tar.xz wireguard-linux-1b1d1f6625e517a08640ddb4b8f8a0e025243fe3.zip | |
Btrfs: fail to mount if we have problems reading the block groups
We don't actually check the return value of btrfs_read_block_groups, so we can
possibly succeed to mount, but then fail to say read the superblock xattr for
selinux which will cause the vfs code to deactivate the super.
This is a problem because in find_free_extent we just assume that we
will find the right space_info for the allocation we want. But if we
failed to read the block groups, we won't have setup any space_info's,
and we'll hit a NULL pointer deref in find_free_extent.
This patch fixes that problem by checking the return value of
btrfs_read_block_groups, and failing out properly. I've also added a
check in find_free_extent so if for some reason we don't find an
appropriate space_info, we just return -ENOSPC.
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'arch/x86/kernel/dumpstack.h')
0 files changed, 0 insertions, 0 deletions