On Tue, Aug 22 2023, Jeremie Courreges-Anglas <j...@wxcvbn.org> wrote:
> 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).
Obvious missing info: this is on riscv64.
> 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
