linux-stable/fs/pstore
Norbert Manthey 4c6d80e114 pstore: Fix double-free in pstore_mkfile() failure path
The pstore_mkfile() function is passed a pointer to a struct
pstore_record. On success it consumes this 'record' pointer and
references it from the created inode.

On failure, however, it may or may not free the record. There are even
two different code paths which return -ENOMEM -- one of which does and
the other doesn't free the record.

Make the behaviour deterministic by never consuming and freeing the
record when returning failure, allowing the caller to do the cleanup
consistently.

Signed-off-by: Norbert Manthey <nmanthey@amazon.de>
Link: https://lore.kernel.org/r/1562331960-26198-1-git-send-email-nmanthey@amazon.de
Fixes: 83f70f0769 ("pstore: Do not duplicate record metadata")
Fixes: 1dfff7dd67 ("pstore: Pass record contents instead of copying")
Cc: stable@vger.kernel.org
[kees: also move "private" allocation location, rename inode cleanup label]
Signed-off-by: Kees Cook <keescook@chromium.org>
2019-07-08 21:04:42 -07:00
..
ftrace.c pstore: no need to check return value of debugfs_create functions 2019-07-08 21:04:42 -07:00
inode.c pstore: Fix double-free in pstore_mkfile() failure path 2019-07-08 21:04:42 -07:00
internal.h pstore: Centralize init/exit routines 2018-10-22 07:11:58 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
platform.c SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
pmsg.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
ram.c pstore/ram: Improve backward compatibility with older Chromebooks 2019-07-08 21:04:42 -07:00
ram_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00