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| author | Michael Halcrow <mhalcrow@us.ibm.com> | 2008-03-04 23:29:24 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-05 01:35:16 +0100 |
| commit | e4465fdaeb3f7b5ef47f389d3eac76db79ff20d8 (patch) | |
| tree | 11dd43980a7df9ba7875a4d5fb55085d152bbdc6 /drivers/isdn | |
| parent | cris: correct syscall numbers in unistd.h for timerfd_settime and timerfd_get... (diff) | |
| download | linux-e4465fdaeb3f7b5ef47f389d3eac76db79ff20d8.tar.xz linux-e4465fdaeb3f7b5ef47f389d3eac76db79ff20d8.zip | |
eCryptfs: make ecryptfs_prepare_write decrypt the page
When the page is not up to date, ecryptfs_prepare_write() should be
acting much like ecryptfs_readpage(). This includes the painfully
obvious step of actually decrypting the page contents read from the
lower encrypted file.
Note that this patch resolves a bug in eCryptfs in 2.6.24 that one can
produce with these steps:
# mount -t ecryptfs /secret /secret
# echo "abc" > /secret/file.txt
# umount /secret
# mount -t ecryptfs /secret /secret
# echo "def" >> /secret/file.txt
# cat /secret/file.txt
Without this patch, the resulting data returned from cat is likely to
be something other than "abc\ndef\n".
(Thanks to Benedikt Driessen for reporting this.)
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: Benedikt Driessen <bdriessen@escrypt.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/isdn')
0 files changed, 0 insertions, 0 deletions