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Filename Latest commit message Latest commit date
Pavel Skripkin d6f751eccc nilfs2: fix memory leak in nilfs_sysfs_delete_device_group 
[ Upstream commit 8fd0c1b0647a6bda4067ee0cd61e8395954b6f28 ]

My local syzbot instance hit memory leak in nilfs2.  The problem was in
missing kobject_put() in nilfs_sysfs_delete_device_group().

kobject_del() does not call kobject_cleanup() for passed kobject and it
leads to leaking duped kobject name if kobject_put() was not called.

Fail log:

  BUG: memory leak
  unreferenced object 0xffff8880596171e0 (size 8):
  comm "syz-executor379", pid 8381, jiffies 4294980258 (age 21.100s)
  hex dump (first 8 bytes):
    6c 6f 6f 70 30 00 00 00                          loop0...
  backtrace:
     kstrdup+0x36/0x70 mm/util.c:60
     kstrdup_const+0x53/0x80 mm/util.c:83
     kvasprintf_const+0x108/0x190 lib/kasprintf.c:48
     kobject_set_name_vargs+0x56/0x150 lib/kobject.c:289
     kobject_add_varg lib/kobject.c:384 [inline]
     kobject_init_and_add+0xc9/0x160 lib/kobject.c:473
     nilfs_sysfs_create_device_group+0x150/0x800 fs/nilfs2/sysfs.c:999
     init_nilfs+0xe26/0x12b0 fs/nilfs2/the_nilfs.c:637

Link: https://lkml.kernel.org/r/20210612140559.20022-1-paskripkin@gmail.com
Fixes: da7141fb78 ("nilfs2: add /sys/fs/nilfs2/<device> group")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Acked-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: Michael L. Semon <mlsemon35@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-06-30 08:47:50 -04:00
arch PCI: Add AMD RS690 quirk to enable 64-bit DMA 2021-06-30 08:47:49 -04:00
block blk-mq: Swap two calls in blk_mq_exit_queue() 2021-05-19 10:08:30 +02:00
certs certs: Fix blacklist flag type confusion 2021-03-04 10:26:29 +01:00
crypto crypto: rng - fix crypto_rng_reset() refcounting when !CRYPTO_STATS 2021-05-11 14:04:15 +02:00
Documentation mm/slub: clarify verification reporting 2021-06-23 14:41:30 +02:00
drivers pinctrl: stm32: fix the reported number of GPIO lines per bank 2021-06-30 08:47:50 -04:00
fs nilfs2: fix memory leak in nilfs_sysfs_delete_device_group 2021-06-30 08:47:50 -04:00
include inet: annotate date races around sk->sk_txhash 2021-06-30 08:47:47 -04:00
init kbuild: add CONFIG_LD_IS_LLD 2021-06-30 08:47:44 -04:00
ipc
kernel module: limit enabling module.sig_enforce 2021-06-30 08:47:42 -04:00
lib lib/lz4: explicitly support in-place decompression 2021-06-10 13:37:16 +02:00
LICENSES
mm mm/slub.c: include swab.h 2021-06-23 14:41:30 +02:00
net net/packet: annotate accesses to po->ifindex 2021-06-30 08:47:48 -04:00
samples samples: vfio-mdev: fix error handing in mdpy_fb_probe() 2021-06-10 13:37:03 +02:00
scripts recordmcount: Correct st_shndx handling 2021-06-30 08:47:49 -04:00
security security: commoncap: fix -Wstringop-overread warning 2021-05-11 14:04:16 +02:00
sound ASoC: rt5659: Fix the lost powers for the HDA header 2021-06-23 14:41:27 +02:00
tools KVM: selftests: Fix kvm_check_cap() assertion 2021-06-30 08:47:49 -04:00
usr
virt KVM: arm/arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST read 2021-06-23 14:41:31 +02:00
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Makefile Linux 5.4.128 2021-06-23 14:41:32 +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.