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authorJan Kara <jack@suse.cz>2011-05-03 11:12:58 -0400
committerTheodore Ts'o <tytso@mit.edu>2011-05-03 11:12:58 -0400
commitdf5e6223407e3e645065c4bd968fee007f0e0287 (patch)
treed5027dc9645dea4a5536819ac98f4299757fff22 /drivers/cpufreq
parent7ad8e4e6ae2a7c95445ee1715b1714106fb95037 (diff)
downloadblackbird-op-linux-df5e6223407e3e645065c4bd968fee007f0e0287.tar.gz
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ext4: fix deadlock in ext4_symlink() in ENOSPC conditions
ext4_symlink() cannot call __page_symlink() with transaction open. __page_symlink() calls ext4_write_begin() which can wait for transaction commit if we are running out of space thus causing a deadlock. Also error recovery in ext4_truncate_failed_write() does not count with the transaction being already started (although I'm not aware of any particular deadlock here). Fix the problem by stopping a transaction before calling __page_symlink() (we have to be careful and put inode to orphan list so that it gets deleted in case of crash) and starting another one after __page_symlink() returns for addition of symlink into a directory. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'drivers/cpufreq')
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