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Filename Latest commit message Latest commit date
Catalin Marinas 3028efe03b NFS: Fix nfs4_lock_state refcounting in nfs4_alloc_{lock,unlock}data() 
Commit 7b587e1a5a ("NFS: use locks_copy_lock() to copy locks.")
changed the lock copying from memcpy() to the dedicated
locks_copy_lock() function. The latter correctly increments the
nfs4_lock_state.ls_count via nfs4_fl_copy_lock(), however, this refcount
has already been incremented in the nfs4_alloc_{lock,unlock}data().
Kmemleak subsequently reports an unreferenced nfs4_lock_state object as
below (arm64 platform):

unreferenced object 0xffff8000fce0b000 (size 256):
  comm "systemd-sysuser", pid 1608, jiffies 4294892825 (age 32.348s)
  hex dump (first 32 bytes):
    20 57 4c fb 00 80 ff ff 20 57 4c fb 00 80 ff ff   WL..... WL.....
    00 57 4c fb 00 80 ff ff 01 00 00 00 00 00 00 00  .WL.............
  backtrace:
    [<000000000d15010d>] kmem_cache_alloc+0x178/0x208
    [<00000000d7c1d264>] nfs4_set_lock_state+0x124/0x1f0
    [<000000009c867628>] nfs4_proc_lock+0x90/0x478
    [<000000001686bd74>] do_setlk+0x64/0xe8
    [<00000000e01500d4>] nfs_lock+0xe8/0x1f0
    [<000000004f387d8d>] vfs_lock_file+0x18/0x40
    [<00000000656ab79b>] do_lock_file_wait+0x68/0xf8
    [<00000000f17c4a4b>] fcntl_setlk+0x224/0x280
    [<0000000052a242c6>] do_fcntl+0x418/0x730
    [<000000004f47291a>] __arm64_sys_fcntl+0x84/0xd0
    [<00000000d6856e01>] el0_svc_common+0x80/0xf0
    [<000000009c4bd1df>] el0_svc_handler+0x2c/0x80
    [<00000000b1a0d479>] el0_svc+0x8/0xc
    [<0000000056c62a0f>] 0xffffffffffffffff

This patch removes the original refcount_inc(&lsp->ls_count) that was
paired with the memcpy() lock copying.

Fixes: 7b587e1a5a ("NFS: use locks_copy_lock() to copy locks.")
Cc: <stable@vger.kernel.org> # 5.0.x-
Cc: NeilBrown <neilb@suse.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-18 13:14:24 -04:00
arch Kbuild updates for v5.1 (2nd) 2019-03-17 13:25:26 -07:00
block for-5.1/block-post-20190315 2019-03-16 12:36:39 -07:00
certs kexec, KEYS: Make use of platform keyring for signature verify 2019-02-04 17:34:07 -05:00
crypto lib/lzo: separate lzo-rle from lzo 2019-03-07 18:32:03 -08:00
Documentation Kbuild updates for v5.1 (2nd) 2019-03-17 13:25:26 -07:00
drivers xen: one further fix for v5.1-rc1 2019-03-17 09:16:22 -07:00
fs NFS: Fix nfs4_lock_state refcounting in nfs4_alloc_{lock,unlock}data() 2019-03-18 13:14:24 -04:00
include Kbuild updates for v5.1 (2nd) 2019-03-17 13:25:26 -07:00
init init/main: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
ipc Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 14:08:19 -07:00
kernel pidfd patches for v5.1-rc1 2019-03-16 13:47:14 -07:00
lib Kbuild updates for v5.1 (2nd) 2019-03-17 13:25:26 -07:00
LICENSES LICENSES: Add GCC runtime library exception text 2019-01-16 14:54:15 -07:00
mm device-dax for 5.1 2019-03-16 13:05:32 -07:00
net Pull request for inlusion in 5.1 2019-03-17 09:10:56 -07:00
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-03-11 08:54:01 -07:00
scripts kconfig: remove stale lxdialog/.gitignore 2019-03-17 15:47:02 +09:00
security selinux/stable-5.1 PR 20190312 2019-03-13 11:10:42 -07:00
sound sound fixes for 5.1-rc1 2019-03-15 14:05:00 -07:00
tools pidfd patches for v5.1-rc1 2019-03-16 13:47:14 -07:00
usr user/Makefile: Fix typo and capitalization in comment section 2018-12-11 00:18:03 +09:00
virt ARM: some cleanups, direct physical timer assignment, cache sanitization 2019-03-15 15:00:28 -07:00
.clang-format Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 13:43:42 -07:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore kbuild: Add support for DT binding schema checks 2018-12-13 09:41:32 -06:00
.mailmap .mailmap: Add Mathieu Othacehe 2019-02-21 11:41:19 +00:00
COPYING
CREDITS Char/Misc driver patches for 5.1-rc1 2019-03-06 14:18:59 -08:00
Kbuild Kbuild updates for v5.1 2019-03-10 17:48:21 -07:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS ARM: some cleanups, direct physical timer assignment, cache sanitization 2019-03-15 15:00:28 -07:00
Makefile Linux 5.1-rc1 2019-03-17 14:22:26 -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.