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Filename Latest commit message Latest commit date
ZhangPeng 90103ccb6e hfs: fix OOB Read in __hfs_brec_find
[ Upstream commit 8d824e69d9f3fa3121b2dda25053bae71e2460d2 ]

Syzbot reported a OOB read bug:

==================================================================
BUG: KASAN: slab-out-of-bounds in hfs_strcmp+0x117/0x190
fs/hfs/string.c:84
Read of size 1 at addr ffff88807eb62c4e by task kworker/u4:1/11
CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted
6.1.0-rc6-syzkaller-00308-g644e9524388a #0
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:284
 print_report+0x107/0x1f0 mm/kasan/report.c:395
 kasan_report+0xcd/0x100 mm/kasan/report.c:495
 hfs_strcmp+0x117/0x190 fs/hfs/string.c:84
 __hfs_brec_find+0x213/0x5c0 fs/hfs/bfind.c:75
 hfs_brec_find+0x276/0x520 fs/hfs/bfind.c:138
 hfs_write_inode+0x34c/0xb40 fs/hfs/inode.c:462
 write_inode fs/fs-writeback.c:1440 [inline]

If the input inode of hfs_write_inode() is incorrect:
struct inode
  struct hfs_inode_info
    struct hfs_cat_key
      struct hfs_name
        u8 len # len is greater than HFS_NAMELEN(31) which is the
maximum length of an HFS filename

OOB read occurred:
hfs_write_inode()
  hfs_brec_find()
    __hfs_brec_find()
      hfs_cat_keycmp()
        hfs_strcmp() # OOB read occurred due to len is too large

Fix this by adding a Check on len in hfs_write_inode() before calling
hfs_brec_find().

Link: https://lkml.kernel.org/r/20221130065959.2168236-1-zhangpeng362@huawei.com
Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
Reported-by: <syzbot+e836ff7133ac02be825f@syzkaller.appspotmail.com>
Cc: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Cc: Viacheslav Dubeyko <slava@dubeyko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-01-18 11:41:34 +01:00
arch powerpc/hv-gpci: Fix hv_gpci event list 2023-01-18 11:41:30 +01:00
block block: unhash blkdev part inode when the part is deleted 2022-12-19 12:24:16 +01:00
certs
crypto crypto: tcrypt - Fix multibuffer skcipher speed test mem leak 2023-01-18 11:41:19 +01:00
Documentation ASoC: dt-bindings: wcd9335: fix reset line polarity in example 2023-01-18 11:41:06 +01:00
drivers ACPICA: Fix error code path in acpi_ds_call_control_method() 2023-01-18 11:41:34 +01:00
fs hfs: fix OOB Read in __hfs_brec_find 2023-01-18 11:41:34 +01:00
include include/uapi/linux/swab: Fix potentially missing __always_inline 2023-01-18 11:41:29 +01:00
init init/Kconfig: fix CC_HAS_ASM_GOTO_TIED_OUTPUT test with dash 2022-12-08 11:22:59 +01:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-08 11:23:06 +01:00
kernel acct: fix potential integer overflow in encode_comp_t() 2023-01-18 11:41:34 +01:00
lib test_firmware: fix memory leak in test_firmware_init() 2023-01-18 11:41:23 +01:00
LICENSES
mm mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page 2022-12-19 12:24:15 +01:00
net net: stream: purge sk_error_queue in sk_stream_kill_queues() 2023-01-18 11:41:33 +01:00
samples samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe() 2023-01-18 11:41:26 +01:00
scripts scripts/faddr2line: Fix regression in name resolution on ppc64le 2022-12-08 11:23:02 +01:00
security apparmor: Use pointer to struct aa_label for lbs_cred 2023-01-18 11:41:17 +01:00
sound ALSA: mts64: fix possible null-ptr-defer in snd_mts64_interrupt 2023-01-18 11:41:09 +01:00
tools selftests/powerpc: Fix resource leaks 2023-01-18 11:41:30 +01:00
usr
virt KVM: arm64: vgic: Fix exit condition in scan_its_table() 2022-10-29 10:20:35 +02:00
.clang-format
.cocciconfig
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.gitattributes
.gitignore
.mailmap
COPYING
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Makefile Linux 5.4.228 2022-12-19 12:24:17 +01:00
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.