PSI: use-after-free in collect_percpu_times()

[Qian Cai]

Since a few days ago, s390 starts to crash on linux-next while reading some
sysfs. It is not always reproducible but seems pretty reproducible after running
the whole MM test suite here,
https://github.com/cailca/linux-mm/blob/master/test.sh

the config:
https://raw.githubusercontent.com/cailca/linux-mm/master/s390.config

The stack trace on s390 is not particular helpful as both gdb and faddr2line are
unable to point out which line causes the issue.

# ./scripts/faddr2line vmlinux collect_percpu_times+0x2d6/0x798
bad symbol size: base: 0x00000000002076f8 end: 0x00000000002076f8

(gdb) list *(collect_percpu_times+0x2d6)
0x2079ce is in collect_percpu_times (./include/linux/compiler.h:199).
194	})
195	
196	static __always_inline
197	void __read_once_size(const volatile void *p, void *res, int size)
198	{
199		__READ_ONCE_SIZE;
200	}
201	
202	#ifdef CONFIG_KASAN
203	/*

Could it be some race conditions in PSI?

01: [ 9499.451788] LTP: starting read_all_sys (read_all -d /sys -q -r 10)ÂÂÂÂÂÂÂ
(zcon 17:55:45) [-- MARK --]
00: [ 9777.709470] =============================================================
00: =====ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709515] BUG: KASAN: use-after-free in collect_percpu_times+0x2d6/0x79
00: 8ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709530] Read of size 4 at addr 0000000066229000 by task read_all/5024
00: 0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709543]ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709559] CPU: 0 PID: 50240 Comm: read_all Not tainted 5.4.0-rc7-next-2
00: 0191118 #4ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709573] Hardware name: IBM 2964 N96 400 (z/VM 6.4.0)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709586] Call Trace:ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709604] ([<000000000568e202>] show_stack+0x11a/0x1b8)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709624]ÂÂ[<0000000005f7568e>] dump_stack+0x136/0x188ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709641]ÂÂ[<0000000005a16594>] print_address_description.isra.8+0x64/0
00: x3f0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709657]ÂÂ[<0000000005a16b6a>] __kasan_report+0x162/0x188ÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709672]ÂÂ[<00000000057779ce>] collect_percpu_times+0x2d6/0x798ÂÂÂÂÂÂÂ
00: [ 9777.709687]ÂÂ[<000000000577a10c>] psi_show+0x84/0x2b0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709703]ÂÂ[<0000000005abf18c>] seq_read+0x2b4/0x838ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709718]ÂÂ[<0000000005a75502>] vfs_read+0x9a/0x158ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709732]ÂÂ[<0000000005a759ea>] ksys_read+0xea/0x190ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709748]ÂÂ[<0000000005fb3100>] system_call+0xd8/0x2b4ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709759] INFO: lockdep is turned off.ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709769]ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709778] The buggy address belongs to the page:ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709793] page:000003d081988a40 refcount:0 mapcount:-2048 mapping:00000
00: 00000000000 index:0x0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709813] raw: 003fffc000000000 000003d081988a48 000003d081988a48 00000
00: 00000000000ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.709831] raw: 0000000000000000 0000000000000000 fffff7ff00000000 00000
00: 00000000000ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710042] page dumped because: kasan: bad access detectedÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710057] page_owner tracks the page as freedÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710075] page last allocated via order 2, migratetype Unmovable, gfp_m
00: ask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710145]ÂÂstack_trace_save+0xc2/0xd8ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710158]ÂÂregister_dummy_stack+0x94/0xc0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710170]ÂÂinit_page_owner+0x5c/0x518ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710188]ÂÂkernel_init_freeable+0x2a4/0x5a8ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710199] page last free stack trace:ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710212]ÂÂstack_trace_save+0xc2/0xd8ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710224]ÂÂregister_dummy_stack+0x94/0xc0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710236]ÂÂinit_page_owner+0x5c/0x518ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710249]ÂÂkernel_init_freeable+0x2a4/0x5a8ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710259]ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710267] Memory state around the buggy address:ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710282]ÂÂ0000000066228f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fcÂ
00: fc fcÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710297]ÂÂ0000000066228f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fcÂ
00: fc fcÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710312] >0000000066229000: ff ff ff ff ff ff ff ff ff ff ff ff ff ffÂ
00: ff ffÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710325]ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ^ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710337]ÂÂ0000000066229080: ff ff ff ff ff ff ff ff ff ff ff ff ff ffÂ
00: ff ffÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710352]ÂÂ0000000066229100: ff ff ff ff ff ff ff ff ff ff ff ff ff ffÂ
00: ff ffÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710366] =============================================================
00: =====ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710389] Unable to handle kernel pointer dereference in virtual kernel
00:ÂÂaddress spaceÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710580] Failing address: 0000000066229000 TEID: 0000000066229803ÂÂÂÂÂ
00: [ 9777.710595] Fault in home space mode while using kernel ASCE.ÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710613] AS:0000000007084007 R3:000000006dc28007 S:000000006d8fa800 P:
00: 000000006622943dÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710700] Oops: 0011 ilc:2 [#1] SMP DEBUG_PAGEALLOCÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710719] Modules linked in: brd ext4 crc16 mbcache jbd2 loop ip_tables
00:ÂÂx_tables xfs dasd_fba_mod dasd_eckd_mod dm_mirror dm_region_hash dm_log dm_
00: modÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710778] CPU: 0 PID: 50240 Comm: read_all Tainted: GÂÂÂÂBÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: 5.4.0-rc7-next-20191118 #4ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710794] Hardware name: IBM 2964 N96 400 (z/VM 6.4.0)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710806] Krnl PSW : 0704c00180000000 00000000057779ce (collect_percpu_
00: times+0x2d6/0x798)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710832]ÂÂÂÂÂÂÂÂÂÂÂÂR:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0
00:ÂÂRI:0 EA:3ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710849] Krnl GPRS: 0000000000000001 000000004a8b2100 00000000063315ac
00:ÂÂ0000000000000007ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710865]ÂÂÂÂÂÂÂÂÂÂÂÂ0000030000000000 000000000578e0be 0000000000000001
00:ÂÂ000000003409fc70ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710881]ÂÂÂÂÂÂÂÂÂÂÂÂ000000000577a10c 070000003409fb00 0000000066229008
00:ÂÂ0000000066229000ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710896]ÂÂÂÂÂÂÂÂÂÂÂÂ000000000639f6b0 0000000005ff5d30 00000000057779ce
00:ÂÂ000000003409fa20ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710939] Krnl Code: 00000000057779c0: ad031000ÂÂÂÂÂÂÂÂÂÂÂÂstosmÂÂÂ0(%r
00: 1),3ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710939]ÂÂÂÂÂÂÂÂÂÂÂÂ00000000057779c4: b904002bÂÂÂÂÂÂÂÂÂÂÂÂlgrÂÂÂÂÂ%r2,
00: %r11ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710939]ÂÂÂÂÂÂÂÂÂÂÂ#00000000057779c8: c0e50014fc9cÂÂÂÂÂÂÂÂbraslÂÂÂ%r14
00: ,0000000005a17300ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710939]ÂÂÂÂÂÂÂÂÂÂÂ>00000000057779ce: 5880b000ÂÂÂÂÂÂÂÂÂÂÂÂlÂÂÂÂÂÂÂ%r8,
00: 0(%r11)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710939]ÂÂÂÂÂÂÂÂÂÂÂÂ00000000057779d2: a7810001ÂÂÂÂÂÂÂÂÂÂÂÂtmllÂÂÂÂ%r8,
00: 1ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710939]ÂÂÂÂÂÂÂÂÂÂÂÂ00000000057779d6: a784ff97ÂÂÂÂÂÂÂÂÂÂÂÂbrcÂÂÂÂÂ8,00
00: 00000005777904ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710939]ÂÂÂÂÂÂÂÂÂÂÂÂ00000000057779da: a7f4ff8aÂÂÂÂÂÂÂÂÂÂÂÂbrcÂÂÂÂÂ15,0
00: 0000000057778eeÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.710939]ÂÂÂÂÂÂÂÂÂÂÂÂ00000000057779de: e310f1300004ÂÂÂÂÂÂÂÂlgÂÂÂÂÂÂ%r1,
00: 304(%r15)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711135] Call Trace:ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711149] ([<00000000057779ce>] collect_percpu_times+0x2d6/0x798)ÂÂÂÂÂÂ
00: [ 9777.711164]ÂÂ[<000000000577a10c>] psi_show+0x84/0x2b0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711180]ÂÂ[<0000000005abf18c>] seq_read+0x2b4/0x838ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711194]ÂÂ[<0000000005a75502>] vfs_read+0x9a/0x158ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711207]ÂÂ[<0000000005a759ea>] ksys_read+0xea/0x190ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711222]ÂÂ[<0000000005fb3100>] system_call+0xd8/0x2b4ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711234] INFO: lockdep is turned off.ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711244] Last Breaking-Event-Address:ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711257]ÂÂ[<0000000005a16a70>] __kasan_report+0x68/0x188ÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
00: [ 9777.711273] Kernel panic - not syncing: Fatal exception: panic_on_oops