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Namjae Jeon 8f0541186e ksmbd: fix heap-based overflow in set_ntacl_dacl() 
The testcase use SMB2_SET_INFO_HE command to set a malformed file attribute
under the label `security.NTACL`. SMB2_QUERY_INFO_HE command in testcase
trigger the following overflow.

[ 4712.003781] ==================================================================
[ 4712.003790] BUG: KASAN: slab-out-of-bounds in build_sec_desc+0x842/0x1dd0 [ksmbd]
[ 4712.003807] Write of size 1060 at addr ffff88801e34c068 by task kworker/0:0/4190

[ 4712.003813] CPU: 0 PID: 4190 Comm: kworker/0:0 Not tainted 5.19.0-rc5 #1
[ 4712.003850] Workqueue: ksmbd-io handle_ksmbd_work [ksmbd]
[ 4712.003867] Call Trace:
[ 4712.003870]  <TASK>
[ 4712.003873]  dump_stack_lvl+0x49/0x5f
[ 4712.003935]  print_report.cold+0x5e/0x5cf
[ 4712.003972]  ? ksmbd_vfs_get_sd_xattr+0x16d/0x500 [ksmbd]
[ 4712.003984]  ? cmp_map_id+0x200/0x200
[ 4712.003988]  ? build_sec_desc+0x842/0x1dd0 [ksmbd]
[ 4712.004000]  kasan_report+0xaa/0x120
[ 4712.004045]  ? build_sec_desc+0x842/0x1dd0 [ksmbd]
[ 4712.004056]  kasan_check_range+0x100/0x1e0
[ 4712.004060]  memcpy+0x3c/0x60
[ 4712.004064]  build_sec_desc+0x842/0x1dd0 [ksmbd]
[ 4712.004076]  ? parse_sec_desc+0x580/0x580 [ksmbd]
[ 4712.004088]  ? ksmbd_acls_fattr+0x281/0x410 [ksmbd]
[ 4712.004099]  smb2_query_info+0xa8f/0x6110 [ksmbd]
[ 4712.004111]  ? psi_group_change+0x856/0xd70
[ 4712.004148]  ? update_load_avg+0x1c3/0x1af0
[ 4712.004152]  ? asym_cpu_capacity_scan+0x5d0/0x5d0
[ 4712.004157]  ? xas_load+0x23/0x300
[ 4712.004162]  ? smb2_query_dir+0x1530/0x1530 [ksmbd]
[ 4712.004173]  ? _raw_spin_lock_bh+0xe0/0xe0
[ 4712.004179]  handle_ksmbd_work+0x30e/0x1020 [ksmbd]
[ 4712.004192]  process_one_work+0x778/0x11c0
[ 4712.004227]  ? _raw_spin_lock_irq+0x8e/0xe0
[ 4712.004231]  worker_thread+0x544/0x1180
[ 4712.004234]  ? __cpuidle_text_end+0x4/0x4
[ 4712.004239]  kthread+0x282/0x320
[ 4712.004243]  ? process_one_work+0x11c0/0x11c0
[ 4712.004246]  ? kthread_complete_and_exit+0x30/0x30
[ 4712.004282]  ret_from_fork+0x1f/0x30

This patch add the buffer validation for security descriptor that is
stored by malformed SMB2_SET_INFO_HE command. and allocate large
response buffer about SMB2_O_INFO_SECURITY file info class.

Fixes: e2f34481b2 ("cifsd: add server-side procedures for SMB3")
Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-17771
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
History 2022-08-04 09:51:38 -05:00
arch - Improve the check whether the kernel supports WP mappings so that it 2022-07-17 08:27:30 -07:00
block block: fix missing blkcg_bio_issue_init 2022-07-14 10:54:49 -06:00
certs Certs changes 2022-06-21 12:13:53 -05:00
crypto crypto: s390 - do not depend on CRYPTO_HW for SIMD implementations 2022-07-06 20:04:06 -07:00
Documentation RISC-V: 2022-07-15 10:31:46 -07:00
drivers - Fix 32b build 2022-07-17 13:08:03 -07:00
fs ksmbd: fix heap-based overflow in set_ntacl_dacl() 2022-08-04 09:51:38 -05:00
include Input updates for v5.19-rc6 2022-07-17 07:52:46 -07:00
init gcc-12: disable '-Warray-bounds' universally for now 2022-06-09 10:11:12 -07:00
ipc ipc: Free mq_sysctls if ipc namespace creation failed 2022-06-22 17:47:41 -05:00
kernel - A single data race fix on the perf event cleanup path to avoid endless 2022-07-17 08:34:02 -07:00
lib ubsan: disable UBSAN_DIV_ZERO for clang 2022-07-14 15:45:26 -07:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm: split huge PUD on wp_huge_pud fallback 2022-07-03 15:42:33 -07:00
net net/tls: Check for errors in tls_device_init 2022-07-14 10:12:39 -07:00
samples Fixes and minor clean ups for tracing: 2022-07-12 16:17:40 -07:00
scripts Just when you thought that all the speculation bugs were addressed and 2022-07-11 18:15:25 -07:00
security integrity-v5.19-fix 2022-07-14 12:15:42 -07:00
sound ALSA: hda/realtek - Enable the headset-mic on a Xiaomi's laptop 2022-07-13 12:42:41 +02:00
tools perf trace: Fix SIGSEGV when processing syscall args 2022-07-17 10:59:52 -03:00
usr Not a lot of material this cycle. Many singleton patches against various 2022-05-27 11:22:03 -07:00
virt KVM: x86: disable preemption around the call to kvm_arch_vcpu_{un|}blocking 2022-06-09 10:52:20 -04:00
.clang-format clang-format: Fix space after for_each macros 2022-05-20 19:27:16 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
.mailmap cxl fixes for 5.19-rc6 2022-07-08 12:55:25 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: mark ARM/PALM TREO SUPPORT orphan 2022-07-07 15:17:00 +02:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: ksmbd: add entry for documentation 2022-07-24 15:30:16 -05:00
Makefile Linux 5.19-rc7 2022-07-17 13:30:22 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.