mirror of
https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
mm/memory_hotplug.c: fix notification in offline error path
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: 7960509329
("mm, memory_hotplug: print reason for the offlining failure")
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Qian Cai <cai@lca.pw>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: <stable@vger.kernel.org> [5.0.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
fcfc2aa018
commit
c4efe484b5
|
@ -1699,12 +1699,12 @@ static int __ref __offline_pages(unsigned long start_pfn,
|
|||
|
||||
failed_removal_isolated:
|
||||
undo_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE);
|
||||
memory_notify(MEM_CANCEL_OFFLINE, &arg);
|
||||
failed_removal:
|
||||
pr_debug("memory offlining [mem %#010llx-%#010llx] failed due to %s\n",
|
||||
(unsigned long long) start_pfn << PAGE_SHIFT,
|
||||
((unsigned long long) end_pfn << PAGE_SHIFT) - 1,
|
||||
reason);
|
||||
memory_notify(MEM_CANCEL_OFFLINE, &arg);
|
||||
/* pushback to free area */
|
||||
mem_hotplug_done();
|
||||
return ret;
|
||||
|
|
Loading…
Reference in a new issue