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Filename Latest commit message Latest commit date
Tom Rix c4ede7571b jffs2: fix use after free in jffs2_sum_write_data()
[ Upstream commit 19646447ad3a680d2ab08c097585b7d96a66126b ]

clang static analysis reports this problem

fs/jffs2/summary.c:794:31: warning: Use of memory after it is freed
                c->summary->sum_list_head = temp->u.next;
                                            ^~~~~~~~~~~~

In jffs2_sum_write_data(), in a loop summary data is handles a node at
a time.  When it has written out the node it is removed the summary list,
and the node is deleted.  In the corner case when a
JFFS2_FEATURE_RWCOMPAT_COPY is seen, a call is made to
jffs2_sum_disable_collecting().  jffs2_sum_disable_collecting() deletes
the whole list which conflicts with the loop's deleting the list by parts.

To preserve the old behavior of stopping the write midway, bail out of
the loop after disabling summary collection.

Fixes: 6171586a7a ("[JFFS2] Correct handling of JFFS2_FEATURE_RWCOMPAT_COPY nodes.")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 10:26:25 +01:00
arch
block bsg: free the request before return error code 2021-03-04 10:26:22 +01:00
certs
crypto crypto: ecdh_helper - Ensure 'len >= secret.len' in decode_key() 2021-03-04 10:26:25 +01:00
Documentation
drivers hwrng: timeriomem - Fix cooldown period calculation 2021-03-04 10:26:24 +01:00
fs jffs2: fix use after free in jffs2_sum_write_data() 2021-03-04 10:26:25 +01:00
include ima: Free IMA measurement buffer after kexec syscall 2021-03-04 10:26:25 +01:00
init
ipc
kernel ima: Free IMA measurement buffer after kexec syscall 2021-03-04 10:26:25 +01:00
lib
LICENSES
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net
samples
scripts
security ima: Free IMA measurement buffer after kexec syscall 2021-03-04 10:26:25 +01:00
sound ASoC: simple-card-utils: Fix device module clock 2021-03-04 10:26:25 +01:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
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Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.