ecryptfs: pass packet set buffer size to parser

Browse source

ecryptfs_parse_packet_set() receives a pointer into the file header, but
it calculates the remaining packet buffer size from PAGE_SIZE - 8.  For
version 1 headers the packet set starts later in the header, so this can
overstate the available buffer.

Pass the actual packet set buffer length from the caller and calculate
per-packet limits from the remaining bytes in that buffer.  Recompute the
remaining length after consuming a tag 3 packet before parsing the
following tag 11 packet.

Fixes: 237fead619 ("[PATCH] ecryptfs: fs/Makefile and fs/Kconfig")
Cc: <stable@vger.kernel.org>
Signed-off-by: Yichong Chen <chenyichong@uniontech.com>
Signed-off-by: Tyler Hicks <code@tyhicks.com>

...

This commit is contained in:

Yichong Chen 2026-07-15 13:20:04 +08:00 • committed by Tyler Hicks

parent 779972513c

commit 2602b79c5b

3 changed files with 23 additions and 5 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

fs/ecryptfs/crypto.c

View file

3

fs/ecryptfs/ecryptfs_kernel.h

View file

23

fs/ecryptfs/keystore.c

View file