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Filename Latest commit message Latest commit date
Gang He d3f82a7c17 ocfs2: fix the crash due to call ocfs2_get_dlm_debug once less 
commit b73eba2a867e10b9b4477738677341f3307c07bb upstream.

Because ocfs2_get_dlm_debug() function is called once less here, ocfs2
file system will trigger the system crash, usually after ocfs2 file
system is unmounted.

This system crash is caused by a generic memory corruption, these crash
backtraces are not always the same, for exapmle,

    ocfs2: Unmounting device (253,16) on (node 172167785)
    general protection fault: 0000 [#1] SMP PTI
    CPU: 3 PID: 14107 Comm: fence_legacy Kdump:
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
    RIP: 0010:__kmalloc+0xa5/0x2a0
    Code: 00 00 4d 8b 07 65 4d 8b
    RSP: 0018:ffffaa1fc094bbe8 EFLAGS: 00010286
    RAX: 0000000000000000 RBX: d310a8800d7a3faf RCX: 0000000000000000
    RDX: 0000000000000000 RSI: 0000000000000dc0 RDI: ffff96e68fc036c0
    RBP: d310a8800d7a3faf R08: ffff96e6ffdb10a0 R09: 00000000752e7079
    R10: 000000000001c513 R11: 0000000004091041 R12: 0000000000000dc0
    R13: 0000000000000039 R14: ffff96e68fc036c0 R15: ffff96e68fc036c0
    FS:  00007f699dfba540(0000) GS:ffff96e6ffd80000(0000) knlGS:00000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 000055f3a9d9b768 CR3: 000000002cd1c000 CR4: 00000000000006e0
    Call Trace:
     ext4_htree_store_dirent+0x35/0x100 [ext4]
     htree_dirblock_to_tree+0xea/0x290 [ext4]
     ext4_htree_fill_tree+0x1c1/0x2d0 [ext4]
     ext4_readdir+0x67c/0x9d0 [ext4]
     iterate_dir+0x8d/0x1a0
     __x64_sys_getdents+0xab/0x130
     do_syscall_64+0x60/0x1f0
     entry_SYSCALL_64_after_hwframe+0x49/0xbe
    RIP: 0033:0x7f699d33a9fb

This regression problem was introduced by commit e581595ea2 ("ocfs: no
need to check return value of debugfs_create functions").

Link: http://lkml.kernel.org/r/20191225061501.13587-1-ghe@suse.com
Fixes: e581595ea2 ("ocfs: no need to check return value of debugfs_create functions")
Signed-off-by: Gang He <ghe@suse.com>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>	[5.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-09 10:19:57 +01:00
arch mm/memory_hotplug: shrink zones when offlining memory 2020-01-09 10:19:56 +01:00
block block: add bio_truncate to fix guard_bio_eod 2020-01-09 10:19:54 +01:00
certs
crypto KEYS: asymmetric: return ENOMEM if akcipher_request_alloc() fails 2019-12-31 16:46:07 +01:00
Documentation dt-bindings: Improve validation build error handling 2020-01-04 19:18:11 +01:00
drivers media: cec: check 'transmit_in_progress', not 'transmitting' 2020-01-09 10:19:56 +01:00
fs ocfs2: fix the crash due to call ocfs2_get_dlm_debug once less 2020-01-09 10:19:57 +01:00
include mm/memory_hotplug: shrink zones when offlining memory 2020-01-09 10:19:56 +01:00
init Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
ipc ipc/sem.c: convert to use built-in RCU list checking 2019-09-25 17:51:41 -07:00
kernel memcg: account security cred as well to kmemcg 2020-01-09 10:19:57 +01:00
lib ubsan, x86: Annotate and allow __ubsan_handle_shift_out_of_bounds() in uaccess regions 2019-12-31 16:44:25 +01:00
LICENSES
mm mm/oom: fix pgtables units mismatch in Killed process message 2020-01-09 10:19:57 +01:00
net netfilter: nft_tproxy: Fix port selector on Big Endian 2020-01-09 10:19:54 +01:00
samples samples: pktgen: fix proc_cmd command result check logic 2019-12-31 16:43:45 +01:00
scripts scripts/kallsyms: fix definitely-lost memory leak 2020-01-04 19:18:23 +01:00
security tomoyo: Don't use nifty names on sockets. 2020-01-04 19:18:42 +01:00
sound ALSA: hda/realtek - Add headset Mic no shutup for ALC283 2020-01-09 10:19:55 +01:00
tools selftests: vm: add fragment CONFIG_TEST_VMALLOC 2020-01-04 19:18:31 +01:00
usr kbuild: update compile-test header list for v5.4-rc2 2019-10-05 15:29:49 +09:00
virt KVM: arm/arm64: Properly handle faulting of device mappings 2019-12-31 16:46:24 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild
Kconfig
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-11-22 14:28:14 -08:00
Makefile Linux 5.4.8 2020-01-04 19:19:19 +01:00
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.