I think I have hit this panic once already. Any hint on how to debug
this further? As far as I can see, there's no obvious offender in
uvm_fault_lower_lookup.
This is current plus guenther's uvm_fault.c diff (which affects
uvm_fault_lower, not uvm_fault_lower_lookup).
ddb{0}> sh panic
*cpu0: smashed stack in uvm_fault_lower_lookup
ddb{0}> tr
panic() at panic+0x106
vce_v2_0_enable_mgcg() at vce_v2_0_enable_mgcg
uvm_fault_wire() at uvm_fault_wire
uvm_fault_lower() at uvm_fault_lower+0x4c
uvm_fault() at uvm_fault+0x150
do_trap_user() at do_trap_user+0x116
cpu_exception_handler_user() at cpu_exception_handler_user+0x7c
end of kernel
end trace frame: 0x557e81e8, count: -7
ddb{0}> sh reg
ra 0xffffffc00029ec78 panic+0x106
sp 0xffffffc326801b20
gp 0x1
tp 0
t0 0x1010101 __ALIGN_SIZE+0xe10101
t1 0xffffffc0002d8ed4 adler32_combine64+0x44
t2 0x445
s0 0xffffffc326801b30
s1 0x1
a0 0x1
a1 0xdd00e07016c01645
a2 0xdd00e07016c01645
a3 0xd
a4 0xffffffc000abc078 cpu_info_primary+0x530
a5 0xffffffc0006d515a generic_space_write_4
a6 0xffffffc00094ce28 __guard_local
a7 0
s2 0xffffffc00083e582 __rodata_start+0x3e582
s3 0
s4 0xffffffc326801d70
s5 0xffffffc00094ce28 __guard_local
s6 0x39ed000 __ALIGN_SIZE+0x37ed000
s7 0xffffffc01f34c480
s8 0xffffffc000a34228 uvmexp_counters
s9 0x8
s10 0x2
s11 0x1000
t3 0x11832e6a4
t4 0x112bef098
t5 0x1182be580
t6 0xf3b9a5b __ALIGN_SIZE+0xf1b9a5b
panic+0x106: addi a0,zero,256
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*25253 421952 53493 55 7 0x1000002 cc
53493 145846 94344 55 3 0x110008a sigsusp sh
45910 484408 29966 55 2 0x3000002 compile
45910 342832 29966 55 7 0x7000002 compile
45910 4850 29966 55 3 0x7000082 thrsleep compile
45910 373162 29966 55 3 0x7000082 thrsleep compile
45910 238970 29966 55 3 0x7000082 thrsleep compile
45910 400713 29966 55 3 0x7000082 thrsleep compile
43469 11281 50916 0 3 0x91 nanoslp perl
83550 150081 50916 0 3 0x100083 kqread ssh
75512 439136 31470 55 7 0x3200002 python3.10
31470 306866 94344 55 3 0x110008a sigsusp sh
13092 84131 50916 0 3 0x100083 kqread ssh
30097 51023 98779 55 7 0x1000002 c++
98779 24187 54331 55 3 0x110008a sigsusp sh
29966 187750 59187 55 3 0x3000082 thrsleep go
29966 40446 59187 55 3 0x7000082 thrsleep go
29966 61954 59187 55 3 0x7000082 thrsleep go
29966 288907 59187 55 3 0x7000082 thrsleep go
29966 913 59187 55 3 0x7000082 kqread go
29966 456813 59187 55 3 0x7000082 thrsleep go
29966 172188 59187 55 3 0x7000082 thrsleep go
29966 258430 59187 55 3 0x7000082 wait go
59187 451912 9830 55 3 0x110008a sigsusp sh
9830 232463 1597 55 3 0x110008a sigsusp make
1597 369316 41901 55 3 0x110008a sigsusp make
41901 490471 51813 55 3 0x110008a sigsusp sh
51813 324355 63554 55 3 0x110008a sigsusp make
63554 329592 92215 55 3 0x110008a sigsusp sh
92215 430131 50916 55 3 0x110008a sigsusp make
70117 495034 50916 0 3 0x100083 kqread ssh
60322 280905 50916 0 3 0x100083 kqread ssh
34039 470764 87963 1000 3 0x100083 kqread top
62476 54956 50916 0 3 0x100083 kqread ssh
21253 69860 18316 55 3 0x1100082 piperd cat
94344 346932 18316 55 3 0x100008a kqread ninja
18316 407104 76553 55 3 0x1000082 wait bash
76553 187337 94045 55 3 0x1000082 wait gmake
94045 164711 16219 55 3 0x110008a sigsusp make
16219 273844 85460 55 3 0x110008a sigsusp sh
85460 410117 22332 55 3 0x110008a sigsusp make
22332 283737 3863 55 3 0x110008a sigsusp sh
3863 292047 50916 55 3 0x110008a sigsusp make
54331 319464 28985 55 3 0x100008a kqread ninja
28985 293377 26695 55 3 0x1000082 kqread cmake
26695 296154 3307 55 3 0x110008a sigsusp make
3307 360961 76515 55 3 0x110008a sigsusp make
76515 419309 95586 55 3 0x110008a sigsusp sh
95586 235090 29226 55 3 0x110008a sigsusp make
29226 266890 96906 55 3 0x110008a sigsusp sh
96906 246548 50916 55 3 0x110008a sigsusp make
56842 123161 50916 0 3 0x100083 kqread ssh
82531 431771 24813 1000 3 0x100083 kqread tmux
24813 23250 62396 1000 3 0x10008b sigsusp ksh
62396 352320 22527 1000 3 0x98 kqread sshd
22527 409056 10293 0 3 0x92 kqread sshd
19570 505539 65024 1000 3 0x100083 ttyin ksh
46784 182571 65024 1000 3 0x100083 ttyin ksh
87963 455757 65024 1000 3 0x10008b sigsusp ksh
47321 351073 50916 0 3 0x100083 kqread ssh
67948 76048 50916 0 3 0x100083 kqread ssh
50916 28124 4615 0 3 0x93 wait perl
4615 215694 65024 1000 3 0x10008b sigsusp ksh
65024 115584 1 1000 3 0x100080 kqread tmux
53269 170352 1 0 3 0x100083 ttyin getty
87470 374055 1 0 3 0x100098 kqread cron
80899 166255 1 99 3 0x1100090 kqread sndiod
13130 229483 1 110 3 0x100090 kqread sndiod
41351 470926 38250 95 3 0x1100092 kqread smtpd
33499 125298 38250 103 3 0x1100092 kqread smtpd
97433 98180 38250 95 3 0x1100092 kqread smtpd
64417 448742 38250 95 3 0x100092 kqread smtpd
71368 257825 38250 95 3 0x1100092 kqread smtpd
45269 32728 38250 95 3 0x1100092 kqread smtpd
38250 240159 1 0 3 0x100080 kqread smtpd
10293 203232 1 0 3 0x88 kqread sshd
28186 230201 0 0 3 0x14280 nfsidl nfsio
87136 454453 0 0 3 0x14280 nfsidl nfsio
45744 66910 0 0 3 0x14280 nfsidl nfsio
18754 461390 0 0 3 0x14280 nfsidl nfsio
6674 212954 33809 0 3 0x80 nfsd nfsd
96780 69732 33809 0 3 0x80 nfsd nfsd
98843 418896 33809 0 3 0x80 nfsd nfsd
83103 370526 33809 0 3 0x80 nfsd nfsd
33809 412630 1 0 3 0x80 netcon nfsd
28130 212710 6502 0 3 0x80 kqread mountd
6502 466705 1 0 3 0x100080 kqread mountd
59653 516411 1 28 3 0x1100090 kqread portmap
77961 115581 77193 83 3 0x100092 kqread ntpd
77193 282188 51769 83 3 0x1100092 kqread ntpd
51769 374654 1 0 3 0x100080 kqread ntpd
16127 266883 71761 74 3 0x1100092 bpf pflogd
71761 122264 1 0 3 0x80 netio pflogd
35372 32328 2132 73 3 0x1100090 kqread syslogd
2132 120932 1 0 3 0x100082 netio syslogd
51573 204669 1 0 3 0x100080 kqread resolvd
87497 128297 66300 77 3 0x100092 kqread dhcpleased
87799 202845 66300 77 3 0x100092 kqread dhcpleased
66300 41678 1 0 3 0x80 kqread dhcpleased
50591 112369 81752 115 3 0x100092 kqread slaacd
7156 177921 81752 115 3 0x100092 kqread slaacd
81752 18338 1 0 3 0x100080 kqread slaacd
8260 359226 0 0 3 0x14200 bored smr
57917 71608 0 0 2 0x14200 zerothread
96841 417222 0 0 3 0x14200 aiodoned aiodoned
79764 433164 0 0 3 0x14200 syncer update
68875 467869 0 0 3 0x14200 cleaner cleaner
34667 354304 0 0 3 0x14200 reaper reaper
60375 210351 0 0 3 0x14200 pgdaemon pagedaemon
35983 103736 0 0 3 0x14200 usbtsk usbtask
50006 168428 0 0 3 0x14200 usbatsk usbatsk
34924 338265 0 0 3 0x14200 bored sensors
68627 271049 0 0 3 0x40014200 idle3
54550 418426 0 0 3 0x40014200 idle2
67924 378921 0 0 3 0x40014200 idle1
61121 95590 0 0 3 0x14200 bored softnet3
70237 71285 0 0 3 0x14200 bored softnet2
93141 158778 0 0 3 0x14200 bored softnet1
19784 202163 0 0 3 0x14200 bored softnet0
44416 207365 0 0 3 0x14200 bored systqmp
51362 157019 0 0 3 0x14200 bored systq
98278 289999 0 0 3 0x40014200 bored softclock
61300 21372 0 0 3 0x40014200 idle0
94547 69486 0 0 3 0x14200 kmalloc kmthread
1 361181 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}>
--
jca | PGP : 0x1524E7EE / 5135 92C1 AD36 5293 2BDF DDCC 0DFA 74AE 1524 E7EE
