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| author | Theodore Ts'o <tytso@mit.edu> | 2018-06-14 12:55:10 -0400 |
|---|---|---|
| committer | Andrew Lehmer <alehmer@google.com> | 2018-10-31 19:46:39 +0000 |
| commit | 8a5902ee807b8d894428c9eb5e4303f39fd0f676 (patch) | |
| tree | 9245a473755d4bcd4eeb243cc9ae4f3c3c75eddd /lib/mpi/mpiutil.c | |
| parent | d8dbc90ca836ef5c46e701cb37e519c6c980787c (diff) | |
ext4: verify the depth of extent tree in ext4_find_extent()
commit bc890a60247171294acc0bd67d211fa4b88d40ba upstream.
If there is a corupted file system where the claimed depth of the
extent tree is -1, this can cause a massive buffer overrun leading to
sadness.
This addresses CVE-2018-10877.
https://bugzilla.kernel.org/show_bug.cgi?id=199417
Bug: 116406625
Change-Id: I899794d207d73c5f160e53d8f41bd37de6e69976
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
[bwh: Backported to 3.16: return -EIO instead of -EFSCORRUPTED]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/mpi/mpiutil.c')
0 files changed, 0 insertions, 0 deletions