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Filename Latest commit message Latest commit date
Baokun Li 0978e9af45 jffs2: fix memory leak in jffs2_do_mount_fs 
commit d051cef784de4d54835f6b6836d98a8f6935772c upstream.

If jffs2_build_filesystem() in jffs2_do_mount_fs() returns an error,
we can observe the following kmemleak report:

--------------------------------------------
unreferenced object 0xffff88811b25a640 (size 64):
  comm "mount", pid 691, jiffies 4294957728 (age 71.952s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffffa493be24>] kmem_cache_alloc_trace+0x584/0x880
    [<ffffffffa5423a06>] jffs2_sum_init+0x86/0x130
    [<ffffffffa5400e58>] jffs2_do_mount_fs+0x798/0xac0
    [<ffffffffa540acf3>] jffs2_do_fill_super+0x383/0xc30
    [<ffffffffa540c00a>] jffs2_fill_super+0x2ea/0x4c0
    [...]
unreferenced object 0xffff88812c760000 (size 65536):
  comm "mount", pid 691, jiffies 4294957728 (age 71.952s)
  hex dump (first 32 bytes):
    bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
    bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
  backtrace:
    [<ffffffffa493a449>] __kmalloc+0x6b9/0x910
    [<ffffffffa5423a57>] jffs2_sum_init+0xd7/0x130
    [<ffffffffa5400e58>] jffs2_do_mount_fs+0x798/0xac0
    [<ffffffffa540acf3>] jffs2_do_fill_super+0x383/0xc30
    [<ffffffffa540c00a>] jffs2_fill_super+0x2ea/0x4c0
    [...]
--------------------------------------------

This is because the resources allocated in jffs2_sum_init() are not
released. Call jffs2_sum_exit() to release these resources to solve
the problem.

Fixes: e631ddba58 ("[JFFS2] Add erase block summary support (mount time improvement)")
Cc: stable@vger.kernel.org
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-15 14:17:59 +02:00
arch nds32: fix access_ok() checks in get/put_user 2022-03-28 08:46:48 +02:00
block
certs
crypto
Documentation Documentation: update stable tree link 2022-04-15 14:17:58 +02:00
drivers can: ems_usb: ems_usb_start_xmit(): fix double dev_kfree_skb() in error path 2022-04-15 14:17:59 +02:00
fs jffs2: fix memory leak in jffs2_do_mount_fs 2022-04-15 14:17:59 +02:00
include NFSD: prevent integer overflow on 32 bit systems 2022-04-15 14:17:59 +02:00
init
ipc
kernel ptrace: Check PTRACE_O_SUSPEND_SECCOMP permission on PTRACE_SEIZE 2022-04-15 14:17:58 +02:00
lib ARM: 9178/1: fix unmet dependency on BITREVERSE for HAVE_ARCH_BITREVERSE 2022-03-19 13:40:16 +01:00
LICENSES
mm
net SUNRPC: avoid race between mod_timer() and del_timer_sync() 2022-04-15 14:17:58 +02:00
samples
scripts
security KEYS: fix length validation in keyctl_pkey_params_get_2() 2022-04-15 14:17:58 +02:00
sound ALSA: hda/realtek: Add quirk for ASUS GA402 2022-03-28 08:46:46 +02:00
tools Revert "selftests/bpf: Add test for bpf_timer overwriting crash" 2022-03-23 09:12:08 +01:00
usr
virt KVM: arm64: Allow SMCCC_ARCH_WORKAROUND_3 to be discovered and migrated 2022-03-19 13:40:15 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
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Kbuild
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MAINTAINERS
Makefile Linux 5.4.188 2022-03-28 08:46:49 +02:00
README

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.