protection_fault: remrunqueue
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syzbot
Jul 26, 2023, 11:41:51 AM7/26/23
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 13a991eac7a5 drm/amd/display: add a NULL pointer check
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=122740f9a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=616d05c91a8d33bf5fb3
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/46bf41e9c357/disk-13a991ea.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/d6e648f108f6/bsd-13a991ea.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/209f4d167493/kernel-13a991ea.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+616d05...@syzkaller.appspotmail.com
kernel: protection fault trap, code=0
Stopped at remrunqueue+0xd0: movq %r12,0x8(%rbx)
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
remrunqueue(ffff8000211d90b0) at remrunqueue+0xd0 sys/kern/kern_sched.c:301
sched_chooseproc() at sched_chooseproc+0x1a3 sys/kern/kern_sched.c:345
mi_switch() at mi_switch+0x27f sys/kern/sched_bsd.c:367
sleep_finish(0,1) at sleep_finish+0x184 sys/kern/kern_synch.c:411
msleep(ffffffff82c4a7f8,ffffffff82b65290,4,ffffffff82851032,0) at msleep+0xea sys/kern/kern_synch.c:249
reaper(ffff8000211ad5c8) at reaper+0xdb sys/kern/kern_exit.c:420
end trace frame: 0x0, count: -6
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff8000211b9800
rbx 0xab79e8b32e8ad71b
rdx 0
rcx 0
rax 0xffff8000211ad5c8
r8 0
r9 0
r10 0x9103ce1409a05680
r11 0xa3e76088d36a5ca0
r12 0xe08343c9c7c3f9d9
r13 0xffff800020d58ff0
r14 0xffff8000211d90b0
r15 0x14
rip 0xffffffff8246fbb0 remrunqueue+0xd0
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000211b97c0
ss 0x10
remrunqueue+0xd0: movq %r12,0x8(%rbx)
ddb{1}> show proc
PROC (reaper) pid=33289 stat=sleep
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=4, usrpri=56, nice=20
forw=0x0, list=0xffff8000211ad880,0xffff8000211ad320
process=0xffff8000ffffe9e0 user=0xffff8000211b4000, vmspace=0xffffffff82d72ff8
estcpu=6, cpticks=7, pctcpu=9.49
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
56610 121742 41925 0 2 0 syz-executor.3
56610 84856 41925 0 2 0x4000000 syz-executor.3
34966 101843 7276 0 2 0 syz-executor.7
16599 300208 38825 0 3 0x3800 suspend syz-executor.0
16599 43914 38825 0 2 0x4081880 syz-executor.0
16599 179082 38825 0 2 0x4081880 syz-executor.0
74505 78107 84923 0 7 0 syz-executor.1
89762 48444 57637 0 2 0 syz-executor.6
89762 364738 57637 0 3 0x4000080 fsleep syz-executor.6
84923 238865 24593 0 3 0x82 nanoslp syz-executor.1
84371 132729 24593 0 3 0x82 nanoslp syz-executor.4
38825 135240 24593 0 3 0x82 nanoslp syz-executor.0
41925 303938 24593 0 3 0x82 nanoslp syz-executor.3
23693 324635 1 0 3 0x80 fsleep syz-executor.0
23693 395437 1 0 3 0x4000080 lockf syz-executor.0
137 51749 1 0 3 0x80 fsleep syz-executor.0
137 174728 1 0 3 0x4000080 lockf syz-executor.0
94459 505941 24593 0 3 0x82 nanoslp syz-executor.5
24602 136601 0 0 3 0x14280 nfsidl nfsio
34373 138559 0 0 3 0x14280 nfsidl nfsio
10979 296494 0 0 3 0x14280 nfsidl nfsio
74398 454892 0 0 3 0x14280 nfsidl nfsio
73168 297546 0 0 3 0x14280 nfsidl nfsio
35547 345342 0 0 3 0x14280 nfsidl nfsio
38418 356419 0 0 3 0x14280 nfsidl nfsio
65385 232671 0 0 3 0x14280 nfsidl nfsio
6499 511242 0 0 3 0x14280 nfsidl nfsio
25427 431755 0 0 3 0x14280 nfsidl nfsio
46485 503280 0 0 3 0x14280 nfsidl nfsio
50757 521939 0 0 3 0x14280 nfsidl nfsio
10479 175412 0 0 3 0x14280 nfsidl nfsio
5904 80243 0 0 3 0x14280 nfsidl nfsio
28480 116491 0 0 3 0x14280 nfsidl nfsio
93780 485727 0 0 3 0x14280 nfsidl nfsio
4866 48166 0 0 3 0x14280 nfsidl nfsio
26063 346213 0 0 3 0x14280 nfsidl nfsio
53177 382115 0 0 3 0x14280 nfsidl nfsio
46668 73444 0 0 3 0x14280 nfsidl nfsio
7276 178190 24593 0 3 0x82 nanoslp syz-executor.7
45475 454605 0 0 3 0x14200 bored sosplice
57637 380135 24593 0 3 0x82 nanoslp syz-executor.6
57627 366782 24593 0 3 0x82 nanoslp syz-executor.2
24593 132881 11466 0 3 0x82 thrsleep syz-fuzzer
24593 522275 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 485004 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 518647 11466 0 3 0x4000082 wait syz-fuzzer
24593 198900 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 125615 11466 0 3 0x4000082 wait syz-fuzzer
24593 355913 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 83943 11466 0 3 0x4000082 wait syz-fuzzer
24593 108247 11466 0 3 0x4000082 wait syz-fuzzer
24593 143387 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 341759 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 270358 11466 0 3 0x4000082 kqread syz-fuzzer
24593 229909 11466 0 3 0x4000082 wait syz-fuzzer
24593 69770 11466 0 3 0x4000082 wait syz-fuzzer
24593 109902 11466 0 3 0x4000082 wait syz-fuzzer
24593 482992 11466 0 3 0x4000082 wait syz-fuzzer
11466 347569 77363 0 3 0x10008a sigsusp ksh
77363 71908 34931 0 3 0x9a kqread sshd
18671 247610 1 0 3 0x100083 ttyin getty
34931 64005 1 0 3 0x88 kqread sshd
65283 125418 52390 74 3 0x1100092 bpf pflogd
52390 320558 1 0 3 0x80 netio pflogd
43001 383097 82038 73 3 0x1100090 kqread syslogd
82038 184220 1 0 3 0x100082 netio syslogd
75760 484620 1 0 3 0x100080 kqread resolvd
22006 89907 99080 77 3 0x100092 kqread dhcpleased
5236 63921 99080 77 3 0x100092 kqread dhcpleased
99080 448419 1 0 3 0x80 kqread dhcpleased
77978 44286 0 0 3 0x14200 bored smr
4029 460358 0 0 2 0x14200 zerothread
61085 335558 0 0 3 0x14200 aiodoned aiodoned
32696 515984 0 0 3 0x14200 syncer update
72807 56013 0 0 3 0x14200 cleaner cleaner
*70472 33289 0 0 3 0x14200 reaper reaper
24865 20817 0 0 3 0x14200 pgdaemon pagedaemon
32495 223540 0 0 3 0x14200 bored viomb
67031 448 0 0 3 0x40014200 acpi0 acpi0
41713 282877 0 0 3 0x40014200 idle1
73521 257292 0 0 3 0x14200 bored softnet3
72218 478872 0 0 3 0x14200 bored softnet2
17270 147517 0 0 3 0x14200 bored softnet1
96008 352725 0 0 3 0x14200 bored softnet0
58748 417948 0 0 3 0x14200 bored systqmp
50399 365789 0 0 3 0x14200 bored systq
4245 563 0 0 3 0x40014200 bored softclock
53366 116618 0 0 3 0x40014200 idle0
1 344632 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 0:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82cbe8e8)
#0 witness_lock+0x447
#1 mtx_enter_try+0x104
#2 mtx_enter+0x4f sys/kern/kern_lock.c:266
#3 uvm_pmr_getpages+0xeac sys/uvm/uvm_pmemrange.c:1205
#4 uvm_pagealloc+0x1a8 sys/uvm/uvm_page.c:910
#5 pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1209
#6 pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2716
#7 uvm_fault_upper_lookup+0x2c0 sys/uvm/uvm_fault.c:896
#8 uvm_fault+0x129 sys/uvm/uvm_fault.c:606
#9 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
#10 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
#11 recall_trap+0x8
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80682274f8)
#0 witness_lock+0x447
#1 mtx_enter_try+0x104
#2 mtx_enter+0x4f sys/kern/kern_lock.c:266
#3 pmap_enter+0x1c3 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:423 [inline]
#3 pmap_enter+0x1c3 sys/arch/amd64/amd64/pmap.c:2710
#4 uvm_fault_upper_lookup+0x2c0 sys/uvm/uvm_fault.c:896
#5 uvm_fault+0x129 sys/uvm/uvm_fault.c:606
#6 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
#7 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
#8 recall_trap+0x8
CPU 1:
exclusive sched_lock &sched_lock r = 0 (0xffffffff82d638a8)
#0 witness_lock+0x447
#1 sleep_finish+0xa2 sys/kern/kern_synch.c:377
#2 msleep+0xea sys/kern/kern_synch.c:249
#3 reaper+0xdb sys/kern/kern_exit.c:420
#4 proc_trampoline+0x1c
Process 74505 (syz-executor.1) thread 0xffff80002122e028 (78107)
exclusive rwlock amaplk r = 0 (0xfffffd807c953898)
#0 witness_lock+0x447
#1 uvm_fault_check+0x41a sys/uvm/uvm_fault.c:783
#2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601
#3 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
#4 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
#5 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd8008a060f8)
#0 witness_lock+0x447
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1773
#2 uvm_fault_check+0x3e sys/uvm/uvm_fault.c:673
#3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601
#4 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
#5 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
#6 recall_trap+0x8
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10196 6510K 7756K 78643K 26219 0
pcb 13 16K 21K 78643K 6263 0
rtable 258 8K 8K 78643K 854 0
pf 32 9K 10K 78643K 224 0
ifaddr 45 16K 17K 78643K 170 0
ifgroup 55 2K 2K 78643K 346 0
sysctl 3 1K 1K 78643K 3 0
counters 60 35K 36K 78643K 210 0
ioctlops 0 0K 4K 78643K 1686 0
iov 0 0K 18K 78643K 752 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1560 98K 98K 78643K 5703 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 87 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 384 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 17 61K 97K 78643K 7819 0
sigio 1 0K 0K 78643K 95 0
proc 70 91K 152K 78643K 1275 0
subproc 130 8K 8K 78643K 299 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 133 0
in_multi 99 7K 7K 78643K 333 0
ether_multi 1 0K 0K 78643K 10 0
mrt 1 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 85 387K 387K 78643K 85 0
exec 0 0K 1K 78643K 1390 0
pfkey data 0 0K 0K 78643K 4 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 442 112K 115K 78643K 79145 0
UVM aobj 131 4K 4K 78643K 135 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 154 0
NDP 12 0K 2K 78643K 131 0
temp 82 5868K 5948K 78643K 49404 0
kqueue 12 18K 26K 78643K 510 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 476 0 473 7 4 3 3 0 8 2
rtentry 112 283 0 164 4 0 4 4 0 8 0
unpcb 144 6117 0 6101 68 62 6 10 0 8 5
syncache 296 31 0 31 11 11 0 1 0 8 0
tcpqe 32 319 0 319 7 7 0 2 0 8 0
tcpcb 808 1386 0 1382 49 48 1 14 0 8 0
arp 120 46 0 28 1 0 1 1 0 8 0
inpcb 368 9255 0 9248 171 162 9 19 0 8 8
nd6 136 78 0 45 2 0 2 2 0 8 0
pkpcb 40 13 0 13 4 4 0 1 0 8 0
kcovpl 48 23 0 13 1 0 1 1 0 8 0
ppxss 1256 20 0 20 6 5 1 1 0 8 1
pffrag 232 69 0 69 1 1 0 1 0 482 0
pffrnode 88 46 0 46 1 1 0 1 0 8 0
pffrent 40 257 0 257 1 1 0 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 233 0 219 1 0 1 1 0 8 0
pfstkey 128 233 0 219 3 1 2 2 0 8 0
pfstate 376 233 0 219 9 5 4 5 0 8 1
pfrule 1344 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1125 0 638 33 1 32 32 0 8 0
art_table 32 1126 0 638 5 0 5 5 0 8 0
art_node 16 276 0 167 1 0 1 1 0 8 0
sysvmsgpl 40 31 0 17 1 0 1 1 0 8 0
semapl 112 380 0 370 1 0 1 1 0 8 0
shmpl 112 132 0 4 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 11082 0 9593 94 0 94 94 0 8 0
ffsino 272 11082 0 9593 100 0 100 100 0 8 0
nchpl 144 22475 0 21974 63 40 23 63 0 8 0
uvmvnodes 80 6016 0 0 123 0 123 123 0 8 0
vnodes 216 6016 0 0 335 0 335 335 0 8 0
namei 1024 73729 0 73729 5 4 1 3 0 8 1
percpumem 16 118 0 75 1 0 1 1 0 8 0
kstatmem 264 174 0 150 2 0 2 2 0 8 0
scxspl 216 73825 0 73825 40 39 1 8 0 8 1
plimitpl 152 963 0 943 1 0 1 1 0 8 0
sigapl 424 8130 0 8059 10 2 8 9 0 8 0
futexpl 64 68501 0 68496 1 0 1 1 0 8 0
knotepl 120 562 0 0 13 2 11 11 0 8 0
kqueuepl 216 1071 0 1061 15 14 1 5 0 8 0
pipepl 320 1649 0 1619 36 33 3 11 0 8 0
fdescpl 496 8084 0 8054 9 4 5 5 0 8 0
filepl 152 50379 0 50102 124 105 19 22 0 8 8
lockfpl 104 3900 0 3894 11 10 1 2 0 8 0
lockfspl 48 1446 0 1443 1 0 1 1 0 8 0
sessionpl 144 38 0 19 1 0 1 1 0 8 0
pgrppl 48 56 0 37 1 0 1 1 0 8 0
ucredpl 104 4531 0 4515 1 0 1 1 0 8 0
zombiepl 144 8063 0 8059 1 0 1 1 0 8 0
processpl 1072 8130 0 8059 5 0 5 5 0 8 0
procpl 696 22213 0 22121 22 12 10 10 0 8 1
srpgc 96 4 0 4 2 2 0 1 0 8 0
sosppl 168 87 0 87 15 15 0 1 0 8 0
sockpl 488 15971 0 15945 407 389 18 38 0 8 14
mcl64k 65536 25 0 0 3 0 3 3 0 8 0
mcl16k 16384 25 0 0 4 1 3 3 0 8 0
mcl12k 12288 33 0 0 2 0 2 2 0 8 0
mcl9k 9216 16 0 0 2 0 2 2 0 8 0
mcl8k 8192 25 0 0 4 1 3 3 0 8 0
mcl4k 4096 18 0 0 3 0 3 3 0 8 0
mcl2k2 2112 9 0 0 1 0 1 1 0 8 0
mcl2k 2048 356 0 0 40 9 31 40 0 8 0
mtagpl 96 970 0 0 22 0 22 22 0 8 0
mbufpl 256 30662 0 0 1898 1 1897 1897 0 8 0
bufpl 288 17394 0 11074 452 0 452 452 0 8 0
anonpl 24 854422 0 841088 197 94 103 120 0 186 9
amapchunkpl 152 248811 0 247882 98 57 41 51 0 158 1
amappl16 200 17218 0 16856 87 67 20 32 0 8 0
amappl15 192 8 0 8 1 1 0 1 0 8 0
amappl14 184 201 0 186 2 1 1 2 0 8 0
amappl13 176 53 0 50 1 0 1 1 0 8 0
amappl12 168 8952 0 8917 4 2 2 3 0 8 0
amappl11 160 59 0 44 1 0 1 1 0 8 0
amappl10 152 54 0 39 1 0 1 1 0 8 0
amappl9 144 265 0 265 18 18 0 2 0 8 0
amappl8 136 582 0 441 5 0 5 5 0 8 0
amappl7 128 131 0 110 1 0 1 1 0 8 0
amappl6 120 407 0 386 2 1 1 2 0 8 0
amappl5 112 346 0 337 1 0 1 1 0 8 0
amappl4 104 1030 0 985 3 1 2 3 0 8 0
amappl3 96 48940 0 48847 9 6 3 5 0 8 0
amappl2 88 8571 0 8498 3 1 2 3 0 8 0
amappl1 80 37539 0 36976 23 10 13 23 0 8 0
amappl 88 78319 0 78059 11 4 7 8 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 134 0 4 3 0 3 3 0 8 0
uaddrrnd 24 8084 0 8054 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 8084 0 8054 1 0 1 1 0 8 0
vmmpekpl 168 67311 0 67248 5 1 4 4 0 8 0
vmmpepl 168 489789 0 487347 267 150 117 152 0 357 0
vmsppl 464 8083 0 8054 10 5 5 5 0 8 1
rwobjpl 56 127478 0 119738 123 13 110 112 0 8 0
pdppl 4096 16176 0 16108 514 440 74 86 0 8 6
pvpl 32 2354982 0 2335295 596 367 229 361 0 265 54
pmappl 248 8083 0 8054 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 3383 0 674 78 0 78 78 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff82bc3ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff82d636a0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82d636a0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
wakeup_n(ffffffff82cbe754,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:538
uvm_pmr_getpages(1,0,0,1,0,1,989efc36798823b3,0) at uvm_pmr_getpages+0xeef sys/uvm/uvm_pmemrange.c:1207
uvm_pagealloc(fffffd8068227538,106a000,0,3) at uvm_pagealloc+0x1a8 sys/uvm/uvm_page.c:910
pmap_get_ptp(fffffd80682274e8,41aa0042000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1209
pmap_enter(fffffd80682274e8,41aa0042000,7ce46000,1,20) at pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2716
uvm_fault_upper_lookup(ffff800024313a00,ffff800024313a38,ffff800024313900,ffff800024313980) at uvm_fault_upper_lookup+0x2c0 sys/uvm/uvm_fault.c:896
uvm_fault(fffffd8008a06000,41aa0041000,0,1) at uvm_fault+0x129 sys/uvm/uvm_fault.c:606
upageflttrap(ffff800024313b80,41aa0041fa0) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff800024313b80) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7b53e0b590, count: -14
ddb{0}> machine ddbcpu 1
Stopped at remrunqueue+0xd0: movq %r12,0x8(%rbx)
ddb{1}> trace
remrunqueue(ffff8000211d90b0) at remrunqueue+0xd0 sys/kern/kern_sched.c:301
sched_chooseproc() at sched_chooseproc+0x1a3 sys/kern/kern_sched.c:345
mi_switch() at mi_switch+0x27f sys/kern/sched_bsd.c:367
sleep_finish(0,1) at sleep_finish+0x184 sys/kern/kern_synch.c:411
msleep(ffffffff82c4a7f8,ffffffff82b65290,4,ffffffff82851032,0) at msleep+0xea sys/kern/kern_synch.c:249
reaper(ffff8000211ad5c8) at reaper+0xdb sys/kern/kern_exit.c:420
end trace frame: 0x0, count: -6
---
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syzbot found the following issue on:
HEAD commit: 13a991eac7a5 drm/amd/display: add a NULL pointer check
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=122740f9a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=616d05c91a8d33bf5fb3
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/46bf41e9c357/disk-13a991ea.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/d6e648f108f6/bsd-13a991ea.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/209f4d167493/kernel-13a991ea.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+616d05...@syzkaller.appspotmail.com
kernel: protection fault trap, code=0
Stopped at remrunqueue+0xd0: movq %r12,0x8(%rbx)
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
remrunqueue(ffff8000211d90b0) at remrunqueue+0xd0 sys/kern/kern_sched.c:301
sched_chooseproc() at sched_chooseproc+0x1a3 sys/kern/kern_sched.c:345
mi_switch() at mi_switch+0x27f sys/kern/sched_bsd.c:367
sleep_finish(0,1) at sleep_finish+0x184 sys/kern/kern_synch.c:411
msleep(ffffffff82c4a7f8,ffffffff82b65290,4,ffffffff82851032,0) at msleep+0xea sys/kern/kern_synch.c:249
reaper(ffff8000211ad5c8) at reaper+0xdb sys/kern/kern_exit.c:420
end trace frame: 0x0, count: -6
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff8000211b9800
rbx 0xab79e8b32e8ad71b
rdx 0
rcx 0
rax 0xffff8000211ad5c8
r8 0
r9 0
r10 0x9103ce1409a05680
r11 0xa3e76088d36a5ca0
r12 0xe08343c9c7c3f9d9
r13 0xffff800020d58ff0
r14 0xffff8000211d90b0
r15 0x14
rip 0xffffffff8246fbb0 remrunqueue+0xd0
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000211b97c0
ss 0x10
remrunqueue+0xd0: movq %r12,0x8(%rbx)
ddb{1}> show proc
PROC (reaper) pid=33289 stat=sleep
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=4, usrpri=56, nice=20
forw=0x0, list=0xffff8000211ad880,0xffff8000211ad320
process=0xffff8000ffffe9e0 user=0xffff8000211b4000, vmspace=0xffffffff82d72ff8
estcpu=6, cpticks=7, pctcpu=9.49
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
56610 121742 41925 0 2 0 syz-executor.3
56610 84856 41925 0 2 0x4000000 syz-executor.3
34966 101843 7276 0 2 0 syz-executor.7
16599 300208 38825 0 3 0x3800 suspend syz-executor.0
16599 43914 38825 0 2 0x4081880 syz-executor.0
16599 179082 38825 0 2 0x4081880 syz-executor.0
74505 78107 84923 0 7 0 syz-executor.1
89762 48444 57637 0 2 0 syz-executor.6
89762 364738 57637 0 3 0x4000080 fsleep syz-executor.6
84923 238865 24593 0 3 0x82 nanoslp syz-executor.1
84371 132729 24593 0 3 0x82 nanoslp syz-executor.4
38825 135240 24593 0 3 0x82 nanoslp syz-executor.0
41925 303938 24593 0 3 0x82 nanoslp syz-executor.3
23693 324635 1 0 3 0x80 fsleep syz-executor.0
23693 395437 1 0 3 0x4000080 lockf syz-executor.0
137 51749 1 0 3 0x80 fsleep syz-executor.0
137 174728 1 0 3 0x4000080 lockf syz-executor.0
94459 505941 24593 0 3 0x82 nanoslp syz-executor.5
24602 136601 0 0 3 0x14280 nfsidl nfsio
34373 138559 0 0 3 0x14280 nfsidl nfsio
10979 296494 0 0 3 0x14280 nfsidl nfsio
74398 454892 0 0 3 0x14280 nfsidl nfsio
73168 297546 0 0 3 0x14280 nfsidl nfsio
35547 345342 0 0 3 0x14280 nfsidl nfsio
38418 356419 0 0 3 0x14280 nfsidl nfsio
65385 232671 0 0 3 0x14280 nfsidl nfsio
6499 511242 0 0 3 0x14280 nfsidl nfsio
25427 431755 0 0 3 0x14280 nfsidl nfsio
46485 503280 0 0 3 0x14280 nfsidl nfsio
50757 521939 0 0 3 0x14280 nfsidl nfsio
10479 175412 0 0 3 0x14280 nfsidl nfsio
5904 80243 0 0 3 0x14280 nfsidl nfsio
28480 116491 0 0 3 0x14280 nfsidl nfsio
93780 485727 0 0 3 0x14280 nfsidl nfsio
4866 48166 0 0 3 0x14280 nfsidl nfsio
26063 346213 0 0 3 0x14280 nfsidl nfsio
53177 382115 0 0 3 0x14280 nfsidl nfsio
46668 73444 0 0 3 0x14280 nfsidl nfsio
7276 178190 24593 0 3 0x82 nanoslp syz-executor.7
45475 454605 0 0 3 0x14200 bored sosplice
57637 380135 24593 0 3 0x82 nanoslp syz-executor.6
57627 366782 24593 0 3 0x82 nanoslp syz-executor.2
24593 132881 11466 0 3 0x82 thrsleep syz-fuzzer
24593 522275 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 485004 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 518647 11466 0 3 0x4000082 wait syz-fuzzer
24593 198900 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 125615 11466 0 3 0x4000082 wait syz-fuzzer
24593 355913 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 83943 11466 0 3 0x4000082 wait syz-fuzzer
24593 108247 11466 0 3 0x4000082 wait syz-fuzzer
24593 143387 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 341759 11466 0 3 0x4000082 thrsleep syz-fuzzer
24593 270358 11466 0 3 0x4000082 kqread syz-fuzzer
24593 229909 11466 0 3 0x4000082 wait syz-fuzzer
24593 69770 11466 0 3 0x4000082 wait syz-fuzzer
24593 109902 11466 0 3 0x4000082 wait syz-fuzzer
24593 482992 11466 0 3 0x4000082 wait syz-fuzzer
11466 347569 77363 0 3 0x10008a sigsusp ksh
77363 71908 34931 0 3 0x9a kqread sshd
18671 247610 1 0 3 0x100083 ttyin getty
34931 64005 1 0 3 0x88 kqread sshd
65283 125418 52390 74 3 0x1100092 bpf pflogd
52390 320558 1 0 3 0x80 netio pflogd
43001 383097 82038 73 3 0x1100090 kqread syslogd
82038 184220 1 0 3 0x100082 netio syslogd
75760 484620 1 0 3 0x100080 kqread resolvd
22006 89907 99080 77 3 0x100092 kqread dhcpleased
5236 63921 99080 77 3 0x100092 kqread dhcpleased
99080 448419 1 0 3 0x80 kqread dhcpleased
77978 44286 0 0 3 0x14200 bored smr
4029 460358 0 0 2 0x14200 zerothread
61085 335558 0 0 3 0x14200 aiodoned aiodoned
32696 515984 0 0 3 0x14200 syncer update
72807 56013 0 0 3 0x14200 cleaner cleaner
*70472 33289 0 0 3 0x14200 reaper reaper
24865 20817 0 0 3 0x14200 pgdaemon pagedaemon
32495 223540 0 0 3 0x14200 bored viomb
67031 448 0 0 3 0x40014200 acpi0 acpi0
41713 282877 0 0 3 0x40014200 idle1
73521 257292 0 0 3 0x14200 bored softnet3
72218 478872 0 0 3 0x14200 bored softnet2
17270 147517 0 0 3 0x14200 bored softnet1
96008 352725 0 0 3 0x14200 bored softnet0
58748 417948 0 0 3 0x14200 bored systqmp
50399 365789 0 0 3 0x14200 bored systq
4245 563 0 0 3 0x40014200 bored softclock
53366 116618 0 0 3 0x40014200 idle0
1 344632 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 0:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82cbe8e8)
#0 witness_lock+0x447
#1 mtx_enter_try+0x104
#2 mtx_enter+0x4f sys/kern/kern_lock.c:266
#3 uvm_pmr_getpages+0xeac sys/uvm/uvm_pmemrange.c:1205
#4 uvm_pagealloc+0x1a8 sys/uvm/uvm_page.c:910
#5 pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1209
#6 pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2716
#7 uvm_fault_upper_lookup+0x2c0 sys/uvm/uvm_fault.c:896
#8 uvm_fault+0x129 sys/uvm/uvm_fault.c:606
#9 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
#10 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
#11 recall_trap+0x8
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80682274f8)
#0 witness_lock+0x447
#1 mtx_enter_try+0x104
#2 mtx_enter+0x4f sys/kern/kern_lock.c:266
#3 pmap_enter+0x1c3 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:423 [inline]
#3 pmap_enter+0x1c3 sys/arch/amd64/amd64/pmap.c:2710
#4 uvm_fault_upper_lookup+0x2c0 sys/uvm/uvm_fault.c:896
#5 uvm_fault+0x129 sys/uvm/uvm_fault.c:606
#6 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
#7 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
#8 recall_trap+0x8
CPU 1:
exclusive sched_lock &sched_lock r = 0 (0xffffffff82d638a8)
#0 witness_lock+0x447
#1 sleep_finish+0xa2 sys/kern/kern_synch.c:377
#2 msleep+0xea sys/kern/kern_synch.c:249
#3 reaper+0xdb sys/kern/kern_exit.c:420
#4 proc_trampoline+0x1c
Process 74505 (syz-executor.1) thread 0xffff80002122e028 (78107)
exclusive rwlock amaplk r = 0 (0xfffffd807c953898)
#0 witness_lock+0x447
#1 uvm_fault_check+0x41a sys/uvm/uvm_fault.c:783
#2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601
#3 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
#4 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
#5 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd8008a060f8)
#0 witness_lock+0x447
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1773
#2 uvm_fault_check+0x3e sys/uvm/uvm_fault.c:673
#3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601
#4 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
#5 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
#6 recall_trap+0x8
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10196 6510K 7756K 78643K 26219 0
pcb 13 16K 21K 78643K 6263 0
rtable 258 8K 8K 78643K 854 0
pf 32 9K 10K 78643K 224 0
ifaddr 45 16K 17K 78643K 170 0
ifgroup 55 2K 2K 78643K 346 0
sysctl 3 1K 1K 78643K 3 0
counters 60 35K 36K 78643K 210 0
ioctlops 0 0K 4K 78643K 1686 0
iov 0 0K 18K 78643K 752 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1560 98K 98K 78643K 5703 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 87 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 384 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 17 61K 97K 78643K 7819 0
sigio 1 0K 0K 78643K 95 0
proc 70 91K 152K 78643K 1275 0
subproc 130 8K 8K 78643K 299 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 133 0
in_multi 99 7K 7K 78643K 333 0
ether_multi 1 0K 0K 78643K 10 0
mrt 1 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 85 387K 387K 78643K 85 0
exec 0 0K 1K 78643K 1390 0
pfkey data 0 0K 0K 78643K 4 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 442 112K 115K 78643K 79145 0
UVM aobj 131 4K 4K 78643K 135 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 154 0
NDP 12 0K 2K 78643K 131 0
temp 82 5868K 5948K 78643K 49404 0
kqueue 12 18K 26K 78643K 510 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 476 0 473 7 4 3 3 0 8 2
rtentry 112 283 0 164 4 0 4 4 0 8 0
unpcb 144 6117 0 6101 68 62 6 10 0 8 5
syncache 296 31 0 31 11 11 0 1 0 8 0
tcpqe 32 319 0 319 7 7 0 2 0 8 0
tcpcb 808 1386 0 1382 49 48 1 14 0 8 0
arp 120 46 0 28 1 0 1 1 0 8 0
inpcb 368 9255 0 9248 171 162 9 19 0 8 8
nd6 136 78 0 45 2 0 2 2 0 8 0
pkpcb 40 13 0 13 4 4 0 1 0 8 0
kcovpl 48 23 0 13 1 0 1 1 0 8 0
ppxss 1256 20 0 20 6 5 1 1 0 8 1
pffrag 232 69 0 69 1 1 0 1 0 482 0
pffrnode 88 46 0 46 1 1 0 1 0 8 0
pffrent 40 257 0 257 1 1 0 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 233 0 219 1 0 1 1 0 8 0
pfstkey 128 233 0 219 3 1 2 2 0 8 0
pfstate 376 233 0 219 9 5 4 5 0 8 1
pfrule 1344 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1125 0 638 33 1 32 32 0 8 0
art_table 32 1126 0 638 5 0 5 5 0 8 0
art_node 16 276 0 167 1 0 1 1 0 8 0
sysvmsgpl 40 31 0 17 1 0 1 1 0 8 0
semapl 112 380 0 370 1 0 1 1 0 8 0
shmpl 112 132 0 4 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 11082 0 9593 94 0 94 94 0 8 0
ffsino 272 11082 0 9593 100 0 100 100 0 8 0
nchpl 144 22475 0 21974 63 40 23 63 0 8 0
uvmvnodes 80 6016 0 0 123 0 123 123 0 8 0
vnodes 216 6016 0 0 335 0 335 335 0 8 0
namei 1024 73729 0 73729 5 4 1 3 0 8 1
percpumem 16 118 0 75 1 0 1 1 0 8 0
kstatmem 264 174 0 150 2 0 2 2 0 8 0
scxspl 216 73825 0 73825 40 39 1 8 0 8 1
plimitpl 152 963 0 943 1 0 1 1 0 8 0
sigapl 424 8130 0 8059 10 2 8 9 0 8 0
futexpl 64 68501 0 68496 1 0 1 1 0 8 0
knotepl 120 562 0 0 13 2 11 11 0 8 0
kqueuepl 216 1071 0 1061 15 14 1 5 0 8 0
pipepl 320 1649 0 1619 36 33 3 11 0 8 0
fdescpl 496 8084 0 8054 9 4 5 5 0 8 0
filepl 152 50379 0 50102 124 105 19 22 0 8 8
lockfpl 104 3900 0 3894 11 10 1 2 0 8 0
lockfspl 48 1446 0 1443 1 0 1 1 0 8 0
sessionpl 144 38 0 19 1 0 1 1 0 8 0
pgrppl 48 56 0 37 1 0 1 1 0 8 0
ucredpl 104 4531 0 4515 1 0 1 1 0 8 0
zombiepl 144 8063 0 8059 1 0 1 1 0 8 0
processpl 1072 8130 0 8059 5 0 5 5 0 8 0
procpl 696 22213 0 22121 22 12 10 10 0 8 1
srpgc 96 4 0 4 2 2 0 1 0 8 0
sosppl 168 87 0 87 15 15 0 1 0 8 0
sockpl 488 15971 0 15945 407 389 18 38 0 8 14
mcl64k 65536 25 0 0 3 0 3 3 0 8 0
mcl16k 16384 25 0 0 4 1 3 3 0 8 0
mcl12k 12288 33 0 0 2 0 2 2 0 8 0
mcl9k 9216 16 0 0 2 0 2 2 0 8 0
mcl8k 8192 25 0 0 4 1 3 3 0 8 0
mcl4k 4096 18 0 0 3 0 3 3 0 8 0
mcl2k2 2112 9 0 0 1 0 1 1 0 8 0
mcl2k 2048 356 0 0 40 9 31 40 0 8 0
mtagpl 96 970 0 0 22 0 22 22 0 8 0
mbufpl 256 30662 0 0 1898 1 1897 1897 0 8 0
bufpl 288 17394 0 11074 452 0 452 452 0 8 0
anonpl 24 854422 0 841088 197 94 103 120 0 186 9
amapchunkpl 152 248811 0 247882 98 57 41 51 0 158 1
amappl16 200 17218 0 16856 87 67 20 32 0 8 0
amappl15 192 8 0 8 1 1 0 1 0 8 0
amappl14 184 201 0 186 2 1 1 2 0 8 0
amappl13 176 53 0 50 1 0 1 1 0 8 0
amappl12 168 8952 0 8917 4 2 2 3 0 8 0
amappl11 160 59 0 44 1 0 1 1 0 8 0
amappl10 152 54 0 39 1 0 1 1 0 8 0
amappl9 144 265 0 265 18 18 0 2 0 8 0
amappl8 136 582 0 441 5 0 5 5 0 8 0
amappl7 128 131 0 110 1 0 1 1 0 8 0
amappl6 120 407 0 386 2 1 1 2 0 8 0
amappl5 112 346 0 337 1 0 1 1 0 8 0
amappl4 104 1030 0 985 3 1 2 3 0 8 0
amappl3 96 48940 0 48847 9 6 3 5 0 8 0
amappl2 88 8571 0 8498 3 1 2 3 0 8 0
amappl1 80 37539 0 36976 23 10 13 23 0 8 0
amappl 88 78319 0 78059 11 4 7 8 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 134 0 4 3 0 3 3 0 8 0
uaddrrnd 24 8084 0 8054 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 8084 0 8054 1 0 1 1 0 8 0
vmmpekpl 168 67311 0 67248 5 1 4 4 0 8 0
vmmpepl 168 489789 0 487347 267 150 117 152 0 357 0
vmsppl 464 8083 0 8054 10 5 5 5 0 8 1
rwobjpl 56 127478 0 119738 123 13 110 112 0 8 0
pdppl 4096 16176 0 16108 514 440 74 86 0 8 6
pvpl 32 2354982 0 2335295 596 367 229 361 0 265 54
pmappl 248 8083 0 8054 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 3383 0 674 78 0 78 78 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff82bc3ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff82d636a0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82d636a0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
wakeup_n(ffffffff82cbe754,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:538
uvm_pmr_getpages(1,0,0,1,0,1,989efc36798823b3,0) at uvm_pmr_getpages+0xeef sys/uvm/uvm_pmemrange.c:1207
uvm_pagealloc(fffffd8068227538,106a000,0,3) at uvm_pagealloc+0x1a8 sys/uvm/uvm_page.c:910
pmap_get_ptp(fffffd80682274e8,41aa0042000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1209
pmap_enter(fffffd80682274e8,41aa0042000,7ce46000,1,20) at pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2716
uvm_fault_upper_lookup(ffff800024313a00,ffff800024313a38,ffff800024313900,ffff800024313980) at uvm_fault_upper_lookup+0x2c0 sys/uvm/uvm_fault.c:896
uvm_fault(fffffd8008a06000,41aa0041000,0,1) at uvm_fault+0x129 sys/uvm/uvm_fault.c:606
upageflttrap(ffff800024313b80,41aa0041fa0) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff800024313b80) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7b53e0b590, count: -14
ddb{0}> machine ddbcpu 1
Stopped at remrunqueue+0xd0: movq %r12,0x8(%rbx)
ddb{1}> trace
remrunqueue(ffff8000211d90b0) at remrunqueue+0xd0 sys/kern/kern_sched.c:301
sched_chooseproc() at sched_chooseproc+0x1a3 sys/kern/kern_sched.c:345
mi_switch() at mi_switch+0x27f sys/kern/sched_bsd.c:367
sleep_finish(0,1) at sleep_finish+0x184 sys/kern/kern_synch.c:411
msleep(ffffffff82c4a7f8,ffffffff82b65290,4,ffffffff82851032,0) at msleep+0xea sys/kern/kern_synch.c:249
reaper(ffff8000211ad5c8) at reaper+0xdb sys/kern/kern_exit.c:420
end trace frame: 0x0, count: -6
---
This report is generated by a bot. It may contain errors.
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If you want to undo deduplication, reply with:
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syzbot
Oct 31, 2023, 3:52:15 AM10/31/23
to syzkaller-o...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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