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Filename Latest commit message Latest commit date
Zhao Mengmeng dac398ed27 jfs: Fix uninit-value access of new_ea in ea_buffer
[ Upstream commit 2b59ffad47db1c46af25ccad157bb3b25147c35c ]

syzbot reports that lzo1x_1_do_compress is using uninit-value:

=====================================================
BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178

...

Uninit was stored to memory at:
 ea_put fs/jfs/xattr.c:639 [inline]

...

Local variable ea_buf created at:
 __jfs_setxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662
 __jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934

=====================================================

The reason is ea_buf->new_ea is not initialized properly.

Fix this by using memset to empty its content at the beginning
in ea_get().

Reported-by: syzbot+02341e0daa42a15ce130@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=02341e0daa42a15ce130
Signed-off-by: Zhao Mengmeng <zhaomengmeng@kylinos.cn>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-08 16:20:38 +01:00
arch x86/syscall: Avoid memcpy() for ia32 syscall_get_arguments() 2024-11-08 16:20:38 +01:00
block
certs
crypto
Documentation proc: add config & param to block forcing mem writes 2024-11-08 16:20:38 +01:00
drivers ata: sata_sil: Rename sil_blacklist to sil_quirks 2024-11-08 16:20:38 +01:00
fs jfs: Fix uninit-value access of new_ea in ea_buffer 2024-11-08 16:20:38 +01:00
include
init
ipc
kernel signal: Replace BUG_ON()s 2024-11-08 16:20:38 +01:00
lib
LICENSES
mm
net tcp: avoid reusing FIN_WAIT2 when trying to find port in connect() process 2024-11-08 16:20:37 +01:00
samples
scripts
security proc: add config & param to block forcing mem writes 2024-11-08 16:20:38 +01:00
sound ALSA: hdsp: Break infinite MIDI input flush loop 2024-11-08 16:20:38 +01:00
tools
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
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.