login: panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
515136 85721 32767 0x10 0x4000000 1 syz-executor.0
* 81555 85721 32767 0x10 0x4000000 0K syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f008000,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e82c152740, count: 7
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f008000,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e82c152740, count: -8
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800021279f60
rbx 0xffffffff82773bff cpu_info_full_primary+0x2bff
rdx 0x8b
rcx 0x2
rax 0x9f
r8 0xffffffff8108bbb4 kprintf+0x144
r9 0x1
r10 0x511c13fa81ffbc64
r11 0x28c3c52033bbfcf5
r12 0xffffffff82773a00 cpu_info_full_primary+0x2a00
r13 0
r14 0
r15 0x1
rip 0xffffffff81c45bc8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021279f50
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=81555 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000fffeea80,0xffffffff82961198
process=0xffff8000ffff0010 user=0xffff800021275000, vmspace=0xfffffd807f008000
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
85721 21940 33335 32767 2 0x10 syz-executor.0
85721 499978 33335 32767 3 0x4000090 fsleep syz-executor.0
85721 515136 33335 32767 7 0x4000010 syz-executor.0
*85721 81555 33335 32767 7 0x4000010 syz-executor.0
33335 117530 95023 32767 2 0x490 syz-executor.0
95023 52232 33606 0 3 0x82 wait syz-executor.0
33606 167468 13276 0 2 0x482 syz-execprog
33606 140846 13276 0 2 0x4000482 syz-execprog
33606 239467 13276 0 3 0x4000082 thrsleep syz-execprog
33606 207849 13276 0 3 0x4000082 kqread syz-execprog
33606 299020 13276 0 3 0x4000082 thrsleep syz-execprog
33606 190463 13276 0 3 0x4000082 thrsleep syz-execprog
33606 212297 13276 0 3 0x4000082 thrsleep syz-execprog
33606 416408 13276 0 3 0x4000082 thrsleep syz-execprog
13276 297828 21725 0 3 0x10008a sigsusp ksh
21725 415768 17721 0 3 0x9a kqread sshd
80373 396012 1 0 3 0x100083 ttyin getty
17721 30713 1 0 3 0x88 kqread sshd
91544 417527 87579 73 3 0x100090 kqread syslogd
87579 387658 1 0 3 0x100082 netio syslogd
35709 140975 1 0 3 0x100080 kqread resolvd
8176 97915 38259 77 3 0x100092 kqread dhcpleased
97825 429944 38259 77 3 0x100092 kqread dhcpleased
38259 26427 1 0 3 0x80 kqread dhcpleased
50692 294960 0 0 3 0x14200 bored smr
98210 76187 0 0 2 0x14200 zerothread
36214 226193 0 0 3 0x14200 aiodoned aiodoned
12606 382831 0 0 3 0x14200 syncer update
74565 79404 0 0 3 0x14200 cleaner cleaner
36098 313989 0 0 3 0x14200 reaper reaper
90926 160454 0 0 3 0x14200 pgdaemon pagedaemon
26991 259918 0 0 3 0x14200 bored viomb
33218 383061 0 0 3 0x40014200 acpi0 acpi0
31617 210989 0 0 3 0x40014200 idle1
44321 401123 0 0 3 0x14200 bored softnet
78665 299265 0 0 3 0x14200 bored systqmp
76242 115483 0 0 3 0x14200 bored systq
16757 157405 0 0 3 0x40014200 bored softclock
94113 501119 0 0 3 0x40014200 idle0
1 291096 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829f9690)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_fault_unwire_locked+0x5d sys/uvm/uvm_fault.c:1590
#4 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
#5 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
Process 85721 (syz-executor.0) thread 0xffff8000fffeea80 (515136)
exclusive rwlock futex r = 0 (0xffffffff827ef040)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 sys_futex+0x5c sys/kern/sys_futex.c:108
#2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#3 Xsyscall+0x128
Process 85721 (syz-executor.0) thread 0xffff8000fffee2a0 (81555)
shared rwlock vmmaplk r = 0 (0xfffffd807f008018)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1558
#2 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8296a3e0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 rw_enter+0x35b sys/kern/kern_rwlock.c:286
#5 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5422
#6 uvmfault_lookup+0xb9 sys/uvm/uvm_fault.c:1695
#7 uvm_fault_check+0x607 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
#7 uvm_fault_check+0x607 sys/uvm/uvm_fault.c:712
#8 uvm_fault+0x102 sys/uvm/uvm_fault.c:601
#9 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1538
#10 sys_sysctl+0x2d8 sys/kern/kern_sysctl.c:241
#11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#12 Xsyscall+0x128
exclusive rwlock sysctllk r = 0 (0xffffffff827670f0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310
#2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:234
#3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4 Xsyscall+0x128
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829f9690)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_fault_unwire_locked+0x5d sys/uvm/uvm_fault.c:1590
#4 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
#5 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10106 6351K 6379K 78643K 11196 0
pcb 13 8K 8K 78643K 13 0
rtable 84 2K 3K 78643K 138 0
ifaddr 32 8K 8K 78643K 32 0
counters 42 33K 33K 78643K 42 0
ioctlops 0 0K 2K 78643K 26 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1182 74K 74K 78643K 1187 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 2 0K 0K 78643K 2 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 4 12K 16K 78643K 52 0
proc 56 74K 87K 78643K 251 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 22 1K 1K 78643K 22 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 19 95K 95K 78643K 19 0
exec 0 0K 2K 78643K 349 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 7 26K 26K 78643K 7 0
UVM amap 140 14K 14K 78643K 2233 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 4 0K 0K 78643K 6 0
temp 23 4181K 4245K 78643K 2049 0
kqueue 12 18K 18K 78643K 21 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> 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 19 0 16 1 0 1 1 0 8 0
rtentry 112 34 0 1 1 0 1 1 0 8 0
unpcb 128 33 0 20 1 0 1 1 0 8 0
syncache 296 5 0 5 1 0 1 1 0 8 1
tcpcb 736 8 0 5 1 0 1 1 0 8 0
arp 120 4 0 0 1 0 1 1 0 8 0
inpcb 304 29 0 23 1 0 1 1 0 8 0
nd6 48 3 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 145 0 0 10 0 10 10 0 8 0
art_table 32 146 0 0 2 0 2 2 0 8 0
art_node 16 33 0 3 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1460 0 61 88 0 88 88 0 8 0
ffsino 272 1460 0 61 94 0 94 94 0 8 0
nchpl 144 1716 0 111 60 0 60 60 0 8 0
uvmvnodes 72 1469 0 0 27 0 27 27 0 8 0
vnodes 224 1469 0 0 87 0 87 87 0 8 0
namei 1024 4424 0 4424 1 0 1 1 0 8 1
percpumem 16 33 0 0 1 0 1 1 0 8 0
scxspl 216 4855 0 4855 2 1 1 2 0 8 1
plimitpl 152 17 0 9 1 0 1 1 0 8 0
sigapl 424 281 0 251 4 0 4 4 0 8 0
futexpl 64 111 0 109 1 0 1 1 0 8 0
knotepl 112 56 0 0 2 0 2 2 0 8 0
kqueuepl 216 17 0 9 1 0 1 1 0 8 0
pipepl 336 76 0 69 1 0 1 1 0 8 0
fdescpl 496 267 0 251 3 0 3 3 0 8 0
filepl 152 1106 0 1041 3 0 3 3 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 18 0 9 1 0 1 1 0 8 0
pgrppl 48 18 0 9 1 0 1 1 0 8 0
ucredpl 96 67 0 56 1 0 1 1 0 8 0
zombiepl 144 251 0 251 1 0 1 1 0 8 1
processpl 1064 281 0 251 3 0 3 3 0 8 0
procpl 672 365 0 325 4 0 4 4 0 8 0
sockpl 480 81 0 59 3 0 3 3 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 80 0 0 10 0 10 10 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 134 0 0 9 0 9 9 0 8 0
bufpl 280 3361 0 153 230 0 230 230 0 8 0
anonpl 24 45747 0 41901 32 2 30 30 0 186 6
amapchunkpl 152 4591 0 4255 16 2 14 15 0 158 1
amappl16 200 200 0 137 5 1 4 4 0 8 0
amappl15 192 68 0 62 1 0 1 1 0 8 0
amappl14 184 3 0 2 1 0 1 1 0 8 0
amappl13 176 22 0 21 1 0 1 1 0 8 0
amappl12 168 57 0 53 1 0 1 1 0 8 0
amappl11 160 73 0 60 1 0 1 1 0 8 0
amappl10 152 10 0 9 2 1 1 1 0 8 0
amappl9 144 227 0 225 1 0 1 1 0 8 0
amappl8 136 302 0 286 1 0 1 1 0 8 0
amappl7 128 43 0 38 1 0 1 1 0 8 0
amappl6 120 50 0 43 1 0 1 1 0 8 0
amappl5 112 190 0 174 1 0 1 1 0 8 0
amappl4 104 561 0 538 1 0 1 1 0 8 0
amappl3 96 205 0 186 1 0 1 1 0 8 0
amappl2 88 397 0 355 2 0 2 2 0 8 1
amappl1 80 8131 0 7710 12 0 12 12 0 8 3
amappl 88 1941 0 1832 3 0 3 3 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 64 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 267 0 251 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 267 0 251 1 0 1 1 0 8 0
vmmpekpl 168 6942 0 6927 1 0 1 1 0 8 0
vmmpepl 168 26580 0 25438 61 0 61 61 0 357 11
vmsppl 368 266 0 251 2 0 2 2 0 8 0
rwobjpl 56 8046 0 7342 14 0 14 14 0 8 3
pdppl 4096 542 0 502 56 14 42 42 0 8 2
pvpl 32 159866 0 153062 132 0 132 132 0 265 77
pmappl 224 266 0 251 1 0 1 1 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 281 0 16 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f008000,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e82c152740, count: -8
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a 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(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff800021274330,ffff8000fffeea80,120,ffffffff824489e8,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370
rwsleep(ffff8000fffeea80,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(2e7e9ac2700,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000fffeea80,ffff8000212744c0,ffff800021274520) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800021274590) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021274590) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e8c251cdb0, count: 5
ddb{1}> trace
x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a 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(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff800021274330,ffff8000fffeea80,120,ffffffff824489e8,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370
rwsleep(ffff8000fffeea80,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(2e7e9ac2700,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000fffeea80,ffff8000212744c0,ffff800021274520) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800021274590) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021274590) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e8c251cdb0, count: -10
ddb{1}>