[lkml]   [2020]   [Mar]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject[GIT PULL] fscrypt fix for v5.6-rc6
The following changes since commit 98d54f81e36ba3bf92172791eba5ca5bd813989b:

Linux 5.6-rc4 (2020-03-01 16:38:46 -0600)

are available in the Git repository at: tags/fscrypt-for-linus

for you to fetch changes up to 2b4eae95c7361e0a147b838715c8baa1380a428f:

fscrypt: don't evict dirty inodes after removing key (2020-03-07 18:43:07 -0800)


Fix a bug where if userspace is writing to encrypted files while the
FS_IOC_REMOVE_ENCRYPTION_KEY ioctl (introduced in v5.4) is running,
dirty inodes could be evicted, causing writes could be lost or the
filesystem to hang due to a use-after-free. This was encountered during
real-world use, not just theoretical.

Tested with the existing fscrypt xfstests, and with a new xfstest I
wrote to reproduce this bug. This fix does expose an existing bug with
'-o lazytime' that Ted is working on fixing, but this fscrypt fix is
more critical and is needed anyway regardless of the lazytime fix.

Eric Biggers (1):
fscrypt: don't evict dirty inodes after removing key

fs/crypto/keysetup.c | 9 +++++++++
1 file changed, 9 insertions(+)

 \ /
  Last update: 2020-03-11 20:49    [W:0.061 / U:2.716 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site