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Chen Zhongjin 1bc6bb657d fs/ntfs3: Fix memory leak if ntfs_read_mft failed 
[ Upstream commit bfa434c601 ]

Label ATTR_ROOT in ntfs_read_mft() sets is_root = true and
ni->ni_flags |= NI_FLAG_DIR, then next attr will goto label ATTR_ALLOC
and alloc ni->dir.alloc_run. However two states are not always
consistent and can make memory leak.

 1) attr_name in ATTR_ROOT does not fit the condition it will set
 is_root = true but NI_FLAG_DIR is not set.
 2) next attr_name in ATTR_ALLOC fits the condition and alloc
 ni->dir.alloc_run
 3) in cleanup function ni_clear(), when NI_FLAG_DIR is set, it frees
 ni->dir.alloc_run, otherwise it frees ni->file.run
 4) because NI_FLAG_DIR is not set in this case, ni->dir.alloc_run is
 leaked as kmemleak reported:

unreferenced object 0xffff888003bc5480 (size 64):
  backtrace:
    [<000000003d42e6b0>] __kmalloc_node+0x4e/0x1c0
    [<00000000d8e19b8a>] kvmalloc_node+0x39/0x1f0
    [<00000000fc3eb5b8>] run_add_entry+0x18a/0xa40 [ntfs3]
    [<0000000011c9f978>] run_unpack+0x75d/0x8e0 [ntfs3]
    [<00000000e7cf1819>] run_unpack_ex+0xbc/0x500 [ntfs3]
    [<00000000bbf0a43d>] ntfs_iget5+0xb25/0x2dd0 [ntfs3]
    [<00000000a6e50693>] ntfs_fill_super+0x218d/0x3580 [ntfs3]
    [<00000000b9170608>] get_tree_bdev+0x3fb/0x710
    [<000000004833798a>] vfs_get_tree+0x8e/0x280
    [<000000006e20b8e6>] path_mount+0xf3c/0x1930
    [<000000007bf15a5f>] do_mount+0xf3/0x110
    ...

Fix this by always setting is_root and NI_FLAG_DIR together.

Fixes: 82cae269cf ("fs/ntfs3: Add initialization of super block")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-05-11 23:03:33 +09:00
arch riscv: Fix ptdump when KASAN is enabled 2023-05-11 23:03:32 +09:00
block blk-mq: don't plug for head insertions in blk_execute_rq_nowait 2023-05-11 23:03:22 +09:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: drbg - Only fail when jent is unavailable in FIPS mode 2023-05-11 23:03:21 +09:00
Documentation ASoC: dt-bindings: qcom,lpass-rx-macro: correct minItems for clocks 2023-05-11 23:03:05 +09:00
drivers RDMA/erdma: Use fixed hardware page size 2023-05-11 23:03:33 +09:00
fs
include uapi/linux/const.h: prefer ISO-friendly __typeof__ 2023-05-11 23:03:30 +09:00
init gcc: disable '-Warray-bounds' for gcc-13 too 2023-04-26 14:28:43 +02:00
io_uring io_uring/rsrc: use nospec'ed indexes 2023-05-11 23:03:24 +09:00
ipc ipc: fix memory leak in init_mqueue_fs() 2022-12-31 13:32:01 +01:00
kernel workqueue: Fix hung time report of worker pools 2023-05-11 23:03:32 +09:00
lib debugobject: Prevent init race with static objects 2023-05-11 23:03:16 +09:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm/mempolicy: fix use-after-free of VMA iterator 2023-05-01 08:26:27 +09:00
net tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp. 2023-05-11 23:03:26 +09:00
rust rust: kernel: Mark rust_fmt_argument as extern "C" 2023-04-26 14:28:38 +02:00
samples ftrace: Export ftrace_free_filter() to modules 2023-02-01 08:34:37 +01:00
scripts scripts/gdb: raise error with reduced debugging information 2023-05-11 23:03:30 +09:00
security selinux: ensure av_permissions.h is built when needed 2023-05-11 23:03:06 +09:00
sound ASoC: fsl_mqs: move of_node_put() to the correct location 2023-05-11 23:03:29 +09:00
tools tracing/user_events: Ensure write index cannot be negative 2023-05-11 23:03:32 +09:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Register /dev/kvm as the _very_ last thing during initialization 2023-03-10 09:34:11 +01:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS audit: update the mailing list in MAINTAINERS 2023-02-25 11:25:42 +01:00
Makefile Linux 6.1.27 2023-05-01 08:26:28 +09:00
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.