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(parent: 967ac8a) | 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)
committerTheodore Ts'o <tytso@mit.edu>
Mon, 28 May 2012 21:02:25 +0000 (17:02 -0400)
commit7e936b737211e6b54e34b71a827e56b872e958d8
treeaca4b57eb1982d2cd21bcaa0cbabc45500f97026tree
parent967ac8af4475ce45474800709b12137aa7634c77commit | diff
ext4: disallow hard-linked directory in ext4_lookup

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>
Cc: stable@kernel.org
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