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| Filename | Latest commit message | Latest commit date |
|---|---|---|
c4efe484b5
When start_isolate_page_range() returned -EBUSY in __offline_pages(), it
calls memory_notify(MEM_CANCEL_OFFLINE, &arg) with an uninitialized
"arg". As the result, it triggers warnings below. Also, it is only
necessary to notify MEM_CANCEL_OFFLINE after MEM_GOING_OFFLINE.
page:ffffea0001200000 count:1 mapcount:0 mapping:0000000000000000
index:0x0
flags: 0x3fffe000001000(reserved)
raw: 003fffe000001000 ffffea0001200008 ffffea0001200008 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: unmovable page
WARNING: CPU: 25 PID: 1665 at mm/kasan/common.c:665
kasan_mem_notifier+0x34/0x23b
CPU: 25 PID: 1665 Comm: bash Tainted: G W 5.0.0+ #94
Hardware name: HP ProLiant DL180 Gen9/ProLiant DL180 Gen9, BIOS U20
10/25/2017
RIP: 0010:kasan_mem_notifier+0x34/0x23b
RSP: 0018:ffff8883ec737890 EFLAGS: 00010206
RAX: 0000000000000246 RBX: ff10f0f4435f1000 RCX: f887a7a21af88000
RDX: dffffc0000000000 RSI: 0000000000000020 RDI: ffff8881f221af88
RBP: ffff8883ec737898 R08: ffff888000000000 R09: ffffffffb0bddcd0
R10: ffffed103e857088 R11: ffff8881f42b8443 R12: dffffc0000000000
R13: 00000000fffffff9 R14: dffffc0000000000 R15: 0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560fbd31d730 CR3: 00000004049c6003 CR4: 00000000001606a0
Call Trace:
notifier_call_chain+0xbf/0x130
__blocking_notifier_call_chain+0x76/0xc0
blocking_notifier_call_chain+0x16/0x20
memory_notify+0x1b/0x20
__offline_pages+0x3e2/0x1210
offline_pages+0x11/0x20
memory_block_action+0x144/0x300
memory_subsys_offline+0xe5/0x170
device_offline+0x13f/0x1e0
state_store+0xeb/0x110
dev_attr_store+0x3f/0x70
sysfs_kf_write+0x104/0x150
kernfs_fop_write+0x25c/0x410
__vfs_write+0x66/0x120
vfs_write+0x15a/0x4f0
ksys_write+0xd2/0x1b0
__x64_sys_write+0x73/0xb0
do_syscall_64+0xeb/0xb78
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f14f75cc3b8
RSP: 002b:00007ffe84d01d68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007f14f75cc3b8
RDX: 0000000000000008 RSI: 0000563f8e433d70 RDI: 0000000000000001
RBP: 0000563f8e433d70 R08: 000000000000000a R09: 00007ffe84d018f0
R10: 000000000000000a R11: 0000000000000246 R12: 00007f14f789e780
R13: 0000000000000008 R14: 00007f14f7899740 R15: 0000000000000008
Link: http://lkml.kernel.org/r/20190320204255.53571-1-cai@lca.pw
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.