Re: [PATCH] trace: skip hwasan

From: Qian Cai
Date: Mon Feb 18 2019 - 08:27:14 EST

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In reply to: Dmitry Vyukov: "Re: [PATCH] trace: skip hwasan"
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On 2/17/19 2:30 AM, Dmitry Vyukov wrote:
> On Sun, Feb 17, 2019 at 5:34 AM Qian Cai <cai@xxxxxx> wrote:
>>
>> Enabling function tracer with CONFIG_KASAN_SW_TAGS=y (hwasan) tracer
>> causes the whole system frozen on ThunderX2 systems with 256 CPUs,
>> because there is a burst of too much pointer access, and then KASAN will
>> dereference each byte of the shadow address for the tag checking which
>> will kill all the CPUs.
>
> Hi Qian,
>
> Could you please elaborate what exactly happens and who/why kills
> CPUs? Number of memory accesses should not make any difference.
> With hardware support (MTE) it won't be possible to disable
> instrumentation (loads and stores check tags themselves), so it would
> be useful to keep track of exact reasons we disable instrumentation to
> know how to deal with them with hardware support.
> It would be useful to keep this info in the comment in the Makefile.

It turns out sometimes it will trigger a hardware error.

# echo function > /sys/kernel/debug/tracing/current_trace

RAS CONTROLLER: Fatal unrecoverable error detected

*** NBU BAR Error ***

MPIDR= 0x81000000
CTX_X0= ffff10001032eb9c
CTX_X1= ffff100010205f08
CTX_X2= 0
CTX_X3= ffff100010205efc
CTX_X4= 8
CTX_X5= 40
CTX_X6= 3f
CTX_X7= 0
CTX_X8= ff
CTX_X9= ffff0808ba65ab46
CTX_X10= ffff0808ba65ab45
CTX_X11= da
CTX_X12= 10071651
CTX_X13= fff60658
CTX_X14= ffff1000140d5000
CTX_X15= ffff100013855578
CTX_X16= 804b004a
CTX_X17= 1000100
CTX_X18= 0
CTX_X19= ffff100010205f08
CTX_X20= ffff100012531cd0
CTX_X21= ffff100010205f08
CTX_X22= ffff10001032eb9c
CTX_X23= 0
CTX_X24= ffff100012531cc0
CTX_X25= 12af
CTX_X26= fffdba05
CTX_X27= daff808ba65ab460
CTX_X28= ffff100012531cc0
CTX_X29= ffff808a2c617320
CTX_X30= ffff10001009b5a4
CTX_X31= ffff100012531cc0
CTX_SCR_EL3= 735
CTX_RUNTIME_SP= 6e545c0
CTX_SPSR_EL3= 604003c9
CTX_ELR_EL3= ffff100010205ecc
Node 0 NBU 0 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011ff00
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011ff00

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 1 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011ff40
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011ff40

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 2 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011ff80
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011ff80

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 3 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011ffc0
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011ffc0

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 4 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fe00
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fe00

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 5 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fe40
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fe40

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 6 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fe80
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fe80

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 7 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fee0
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fee0

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 8 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fd30
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fd30

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 9 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fd60
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fd60

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 10 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fda0
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fda0

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 11 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fdc0
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fdc0

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 12 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fc00
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fc00

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 13 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fc40
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fc40

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 14 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fc80
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fc80

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back
Node 0 NBU 15 Error report :
NBU BAR Error
NBU_REG_BAR_ADDRESS_ERROR_REG0 : 0x0040554c
NBU_REG_BAR_ADDRESS_ERROR_REG1 : 0x0011fcc0
NBU_REG_BAR_ADDRESS_ERROR_REG2 : 0x00000004
Physical Address : 0x40011fcc0

NBU BAR Error : Decoded info :
Agent info : CPU
Core ID : 21
Thread ID : 1
Requ: type : 4 : Write Back

Current NBU DRAM BAR setting:
Node0 BAR0 Base 00004000 Limit 00007FFC chan_xlation 00004008 node_xlation 00000000
Node0 BAR1 Base 00080001 Limit 000FEFFC chan_xlation 0007C008 node_xlation 00000000
Node0 BAR2 Base 00880001 Limit 00FFCFFC chan_xlation 007FD008 node_xlation 00000000
Node0 BAR3 Base 00FFD001 Limit 00FFFFDF chan_xlation 00FFD000 node_xlation 00000000
Node0 BAR4 Base 08800001 Limit 08BFCFDF chan_xlation 087FD000 node_xlation 00000000
Node0 BAR5 Base 08BFD001 Limit 093FCFEE chan_xlation 08BFD008 node_xlation 00000002
Node0 BAR6 Base 093FD001 Limit 097FCFDF chan_xlation 093FD000 node_xlation 00000002
Node0 BAR7 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node0 BAR8 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node0 BAR9 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node0 BAR10 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node0 BAR11 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node0 BAR12 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node0 BAR13 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node0 BAR14 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node0 BAR15 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR0 Base 00004000 Limit 00007FFC chan_xlation 00004008 node_xlation 00000000
Node1 BAR1 Base 00080001 Limit 000FEFFC chan_xlation 0007C008 node_xlation 00000000
Node1 BAR2 Base 00880001 Limit 00FFCFFC chan_xlation 007FD008 node_xlation 00000000
Node1 BAR3 Base 00FFD001 Limit 00FFFFDF chan_xlation 00FFD000 node_xlation 00000000
Node1 BAR4 Base 08800001 Limit 08BFCFDF chan_xlation 087FD000 node_xlation 00000000
Node1 BAR5 Base 08BFD001 Limit 093FCFEE chan_xlation 08BFD008 node_xlation 00000002
Node1 BAR6 Base 093FD001 Limit 097FCFDF chan_xlation 093FD000 node_xlation 00000002
Node1 BAR7 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR8 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR9 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR10 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR11 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR12 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR13 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR14 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000
Node1 BAR15 Base FFFFF000 Limit 00000000 chan_xlation 00000000 node_xlation 00000000

0.0.0:
00: AF00177D
04: 00100006
08: 06000000
0C: 00000010
10: 00000000
14: 00000000
18: 00000000
1C: 00000000
20: 00000000
24: 00000000
28: 00000000
2C: 0000177D
30: 00000000
34: 00000090
38: 00000000
3C: 00000000

0.1.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00010100
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.2.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00020200
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.3.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00030300
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.4.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00040400
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.5.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00050500
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.6.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00060600
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.7.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00070700
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.8.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00080800
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.9.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00090900
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.a.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 000A0A00
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.b.0:
00: AF84177D
04: 00100106
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 000C0B00
1C: 20000000
20: 43104300
24: 03F10001
28: 00000100
2C: 00000100
30: 00000000
34: 00000048
38: 00000000
3C: 000201FF

0.c.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 000D0D00
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.d.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 000E0E00
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

0.e.0:
00: AF84177D
04: 00100106
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00100F00
1C: 20000000
20: 42F04000
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 000201FF

0.f.0:
00: 902614E4
04: 00100406
08: 0C033000
0C: 00800010
10: 0400000C
14: 00000100
18: 0401000C
1C: 00000100
20: 00000000
24: 00000000
28: 00000000
2C: 00000000
30: 00000000
34: 00000080
38: 00000000
3C: 00000000

0.f.1:
00: 902614E4
04: 00100406
08: 0C033000
0C: 00800010
10: 0402000C
14: 00000100
18: 0403000C
1C: 00000100
20: 00000000
24: 00000000
28: 00000000
2C: 00000000
30: 00000000
34: 00000080
38: 00000000
3C: 00000000

0.10.0:
00: 902714E4
04: 00100406
08: 01060100
0C: 00800010
10: 00000000
14: 00000000
18: 0404000C
1C: 00000100
20: 00000000
24: 43200000
28: 00000000
2C: 00000000
30: 00000000
34: 00000080
38: 00000000
3C: 000000FF

0.10.1:
00: 902714E4
04: 00100406
08: 01060100
0C: 00800010
10: 00000000
14: 00000000
18: 0405000C
1C: 00000100
20: 00000000
24: 43210000
28: 00000000
2C: 00000000
30: 00000000
34: 00000080
38: 00000000
3C: 000000FF

b.0.0:
00: 101515B3
04: 00100506
08: 02000000
0C: 00800000
10: 0000000C
14: 00000100
18: 00000000
1C: 00000000
20: 00000000
24: 00000000
28: 00000000
2C: 028A1590
30: FFF00000
34: 00000060
38: 00000000
3C: 000001FF

b.0.1:
00: 101515B3
04: 00100506
08: 02000000
0C: 00800000
10: 0200000C
14: 00000100
18: 00000000
1C: 00000000
20: 00000000
24: 00000000
28: 00000000
2C: 028A1590
30: FFF00000
34: 00000060
38: 00000000
3C: 000002FF

f.0.0:
00: 11501A03
04: 00100107
08: 06040004
0C: 00010000
10: 00000000
14: 00000000
18: 0010100F
1C: 022001F1
20: 42F04000
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000050
38: 00000000
3C: 000201FF

10.0.0:
00: 20001A03
04: 02100102
08: 03000041
0C: 00000000
10: 40000000
14: 42000000
18: 00000001
1C: 00000000
20: 00000000
24: 00000000
28: 00000000
2C: 20001A03
30: 00000000
34: 00000040
38: 00000000
3C: 000001FF

80.0.0:
00: AF00177D
04: 00100002
08: 06000000
0C: 00000010
10: 00000000
14: 00000000
18: 00000000
1C: 00000000
20: 00000000
24: 00000000
28: 00000000
2C: 0000177D
30: 00000000
34: 00000090
38: 00000000
3C: 00000000

80.1.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00818180
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

80.9.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00828280
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

80.b.0:
00: AF84177D
04: 00100000
08: 06040000
0C: 00010000
10: 00000000
14: 00000000
18: 00838380
1C: 00000000
20: 0000FFF0
24: 0001FFF1
28: 00000000
2C: 00000000
30: 00000000
34: 00000048
38: 00000000
3C: 00000100

80.f.0:
00: 902614E4
04: 00100406
08: 0C033000
0C: 00800010
10: 0000000C
14: 00000140
18: 0001000C
1C: 00000140
20: 00000000
24: 00000000
28: 00000000
2C: 00000000
30: 00000000
34: 00000080
38: 00000000
3C: 00000000

80.f.1:
00: 902614E4
04: 00100406
08: 0C033000
0C: 00800010
10: 0002000C
14: 00000140
18: 0003000C
1C: 00000140
20: 00000000
24: 00000000
28: 00000000
2C: 00000000
30: 00000000
34: 00000080
38: 00000000
3C: 00000000

80.10.0:
00: 902714E4
04: 00100406
08: 01060100
0C: 00800010
10: 00000000
14: 00000000
18: 0004000C
1C: 00000140
20: 00000000
24: 60000000
28: 00000000
2C: 00000000
30: 00000000
34: 00000080
38: 00000000
3C: 000000FF

80.10.1:
00: 902714E4
04: 00100406
08: 01060100
0C: 00800010
10: 00000000
14: 00000000
18: 0005000C
1C: 00000140
20: 00000000
24: 60010000
28: 00000000
2C: 00000000
30: 00000000
34: 00000080
38: 00000000
3C: 000000FF
RAS CONTROLLER: SYSTEM HALTED...

Next message: Naresh Kamboju: "Linux-next 20190218: am57xx-evm: mmc1: ADMA error"
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In reply to: Dmitry Vyukov: "Re: [PATCH] trace: skip hwasan"
Next in thread: Dmitry Vyukov: "Re: [PATCH] trace: skip hwasan"
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