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Wang Kefeng 7719a68b2f ARM: 9192/1: amba: fix memory leak in amba_device_try_add() 
If amba_device_try_add() return error code (not EPROBE_DEFER),
memory leak occurred when amba device fails to read periphid.

unreferenced object 0xc1c60800 (size 1024):
  comm "swapper/0", pid 1, jiffies 4294937333 (age 75.200s)
  hex dump (first 32 bytes):
    40 40 db c1 04 08 c6 c1 04 08 c6 c1 00 00 00 00  @@..............
    00 d9 c1 c1 84 6f 38 c1 00 00 00 00 01 00 00 00  .....o8.........
  backtrace:
    [<(ptrval)>] kmem_cache_alloc_trace+0x168/0x2b4
    [<(ptrval)>] amba_device_alloc+0x38/0x7c
    [<(ptrval)>] of_platform_bus_create+0x2f4/0x4e8
    [<(ptrval)>] of_platform_bus_create+0x380/0x4e8
    [<(ptrval)>] of_platform_bus_create+0x380/0x4e8
    [<(ptrval)>] of_platform_bus_create+0x380/0x4e8
    [<(ptrval)>] of_platform_populate+0x70/0xc4
    [<(ptrval)>] of_platform_default_populate_init+0xb4/0xcc
    [<(ptrval)>] do_one_initcall+0x58/0x218
    [<(ptrval)>] kernel_init_freeable+0x250/0x29c
    [<(ptrval)>] kernel_init+0x24/0x148
    [<(ptrval)>] ret_from_fork+0x14/0x1c
    [<00000000>] 0x0
unreferenced object 0xc1db4040 (size 64):
  comm "swapper/0", pid 1, jiffies 4294937333 (age 75.200s)
  hex dump (first 32 bytes):
    31 63 30 66 30 30 30 30 2e 77 64 74 00 00 00 00  1c0f0000.wdt....
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<(ptrval)>] __kmalloc_track_caller+0x19c/0x2f8
    [<(ptrval)>] kvasprintf+0x60/0xcc
    [<(ptrval)>] kvasprintf_const+0x54/0x78
    [<(ptrval)>] kobject_set_name_vargs+0x34/0xa8
    [<(ptrval)>] dev_set_name+0x40/0x5c
    [<(ptrval)>] of_device_make_bus_id+0x128/0x1f8
    [<(ptrval)>] of_platform_bus_create+0x4dc/0x4e8
    [<(ptrval)>] of_platform_bus_create+0x380/0x4e8
    [<(ptrval)>] of_platform_bus_create+0x380/0x4e8
    [<(ptrval)>] of_platform_bus_create+0x380/0x4e8
    [<(ptrval)>] of_platform_populate+0x70/0xc4
    [<(ptrval)>] of_platform_default_populate_init+0xb4/0xcc
    [<(ptrval)>] do_one_initcall+0x58/0x218
    [<(ptrval)>] kernel_init_freeable+0x250/0x29c
    [<(ptrval)>] kernel_init+0x24/0x148
    [<(ptrval)>] ret_from_fork+0x14/0x1c

Fix them by adding amba_device_put() to release device name and
amba device.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2022-05-20 12:32:31 +01:00
arch ARM: 9197/1: spectre-bhb: fix loop8 sequence for Thumb2 2022-05-18 11:38:47 +01:00
block for-5.18/block-2022-04-01 2022-04-01 16:20:00 -07:00
certs Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
crypto for-5.18/64bit-pi-2022-03-25 2022-03-26 12:01:35 -07:00
Documentation Updates to Tracing: 2022-04-03 12:26:01 -07:00
drivers ARM: 9192/1: amba: fix memory leak in amba_device_try_add() 2022-05-20 12:32:31 +01:00
fs Updates to Tracing: 2022-04-03 12:26:01 -07:00
include Updates to Tracing: 2022-04-03 12:26:01 -07:00
init Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
ipc fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
kernel Updates to Tracing: 2022-04-03 12:26:01 -07:00
lib for-5.18/block-2022-04-01 2022-04-01 16:20:00 -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 Filesystem/VFS changes for 5.18, part two 2022-04-01 13:50:50 -07:00
net Networking fixes for 5.18-rc1 and rethook patches. 2022-03-31 11:23:31 -07:00
samples dma-mapping updates for Linux 5.18 2022-03-29 08:50:14 -07:00
scripts modpost: restore the warning message for missing symbol versions 2022-04-03 03:11:51 +09:00
security hardening updates for v5.18-rc1-fix1 2022-03-31 11:43:01 -07:00
sound sound fixes for 5.18-rc1 2022-04-01 10:32:46 -07:00
tools A set of x86 fixes and updates: 2022-04-03 12:15:47 -07:00
usr Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
virt KVM: Remove dirty handling from gfn_to_pfn_cache completely 2022-04-02 05:34:41 -04:00
.clang-format genirq/msi: Make interrupt allocation less convoluted 2021-12-16 22:22:20 +01:00
.cocciconfig
.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 .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: update Kirill's email 2022-04-01 11:46:09 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: replace a Microchip AT91 maintainer 2022-02-09 11:30:01 +01:00
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 chrome platform changes for 5.18 2022-04-02 10:44:18 -07:00
Makefile Linux 5.18-rc1 2022-04-03 14:08:21 -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.