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(parent: 3e9fc33) | patch
ext4: disallow hard-linked directory in ext4_lookup
authorAndreas Dilger <adilger@dilger.ca>
Mon, 28 May 2012 21:02:25 +0000 (17:02 -0400)
committerBen Hutchings <ben@decadent.org.uk>
Sun, 10 Jun 2012 13:41:49 +0000 (14:41 +0100)
commit7523a2de6d789ce1b8f5601f9305ccfa68924c3a
tree48fb4fc8f50caae35efd843c182d4e3c0f6a14e7tree | snapshot
parent3e9fc33800a233c2820abae8428fda5f5e508263commit | diff
ext4: disallow hard-linked directory in ext4_lookup

commit 7e936b737211e6b54e34b71a827e56b872e958d8 upstream.

A hard-linked directory to its parent can cause the VFS to deadlock,
and is a sign of a corrupted file system.  So detect this case in
ext4_lookup(), before the rmdir() lockup scenario can take place.

Signed-off-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
fs/ext4/namei.c diff | blob | history
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