Messages in this thread | | | Date | Tue, 20 May 2008 21:03:21 +0400 | From | Cyrill Gorcunov <> | Subject | [Q] eCryptFS race window? |
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Hi Michael,
it seems there is a few potential race window in eCryptFS which I was trying to fix but it requires more deeper eCrypFS knowledge that have (at least only by understanding eCryptFS in big picture it is possible to fix this problem by elegant path). So what is the problem - the procedures
ecryptfs_miscdev_poll ecryptfs_miscdev_read
does take ecryptfs_daemon_hash_mux mutex and then daemon->mux _but_ releases them not in exactly backward order as it should. My patches (not in mainline but you saw them) was screwed up 'cause mutex_is_locked could release mutex acquired by another process and that is wrong. But I've a hope that I'm simply *wrong* about this possible races ;) Take a look please.
- Cyrill -
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