I am seeing these messages whenever I have two processes reading the
same file. Note that write access is not necessary.
The simplest way to reproduce it is
git grep abczzz & git grep abczzz
but this is probably because git uses multiple threads, rather than
because the bug is related to git. In fact, I reproduced it in places
where I have not even moved the HEAD of this repository since I copied
it from an unencrypted directory to an ecryptfs one.
Another way to reproduce it for me (but much less consistently) is:
(find . -type f | xargs md5sum > /dev/null) & find . -type f | xargs
md5sum > /dev/null
which gives occasional Input/Output errors. In some cases (and
especially with git grep) instead the program sees an empty file
(confirmed with strace) which shows as
error: 'Documentation/HOWTO': short read Success
error: 'Documentation/arm/tcm.txt': short read Success
error: 'Documentation/braille-console.txt': short read Success
At the same time, the dreaded messages appear in /var/log/messages
Dec 7 16:55:54 yakj kernel: [32510.145170] ecryptfs_readpage: Error
decrypting page; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145180]
ecryptfs_read_and_validate_header_region: Error reading header region; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145182] ecryptfs_decrypt_page: Error
attempting to read lower page; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145184] ecryptfs_readpage: Error
decrypting page; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145198]
ecryptfs_read_and_validate_header_region: Error reading header region; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145231]
ecryptfs_read_and_validate_header_region: Error reading header region; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145235]
ecryptfs_read_and_validate_header_region: Error reading header region; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145245]
ecryptfs_read_and_validate_header_region: Error reading header region; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145285]
ecryptfs_read_and_validate_header_region: Error reading header region; rc = [-4]
Dec 7 16:55:54 yakj kernel: [32510.145320]
ecryptfs_read_and_validate_header_region: Error reading header region; rc = [-4]
Dec 7 16:59:56 yakj kernel: [32752.032531]
ecryptfs_read_and_validate_header_region: Error reading header region; rc = [-4]
Dec 7 16:59:56 yakj kernel: [32752.032550] Either the lower file is not in
a valid eCryptfs format, or the key could not be retrieved. Plaintext
passthrough mode is not enabled; returning -EIO
Dec 7 17:01:11 yakj kernel: [32827.829724] Either the lower file is not in
a valid eCryptfs format, or the key could not be retrieved. Plaintext
passthrough mode is not enabled; returning -EIO
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https://bugs.launchpad.net/bugs/490005
Title:
ecryptfs_readpage: Error decrypting page
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