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| author | Al Viro <[email protected]> | 2012-09-21 12:19:02 +0000 |
|---|---|---|
| committer | Al Viro <[email protected]> | 2012-09-23 00:48:18 +0000 |
| commit | 156cacb1d0d36b0d0582d9e798e58e0044f516b3 (patch) | |
| tree | 79eddbde8671b1899d77dcfabb3ae3e21ce39072 /lib/dma-debug.c | |
| parent | Linux 3.6-rc3 (diff) | |
| download | kernel-156cacb1d0d36b0d0582d9e798e58e0044f516b3.tar.gz kernel-156cacb1d0d36b0d0582d9e798e58e0044f516b3.zip | |
do_add_mount()/umount -l races
normally we deal with lock_mount()/umount races by checking that
mountpoint to be is still in our namespace after lock_mount() has
been done. However, do_add_mount() skips that check when called
with MNT_SHRINKABLE in flags (i.e. from finish_automount()). The
reason is that ->mnt_ns may be a temporary namespace created exactly
to contain automounts a-la NFS4 referral handling. It's not the
namespace of the caller, though, so check_mnt() would fail here.
We still need to check that ->mnt_ns is non-NULL in that case,
though.
Signed-off-by: Al Viro <[email protected]>
Diffstat (limited to 'lib/dma-debug.c')
0 files changed, 0 insertions, 0 deletions