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Andreas Dilger authored
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
7e936b73