*cpu0: uvm_fault(0xfffffa806d0005e0, 0x7fff0000800f, 0, 1) -> e
ddb{1}> show kasan
No such command
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x73b34598cce0, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff800032376480
rbx 0
rdx 0
rcx 0xffff800045feefa8
rax 0x3b
r8 0xffff8000323763b0
r9 0x1
r10 0xb22a9a2fb64b60c1
r11 0xe6bb555e61a29d05
r12 0
r13 0
r14 0xffff800045feefa8
r15 0
rip 0xffffffff82f5b3ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff800032376400
ss 0x10
savectx+0xae: movl $0,%gs:0x688
ddb{1}> show proc
PROC (syz-executor) tid=114165 pid=62873 tcnt=1 stat=onproc
flags process=10000010<SUGID,WAITEVENT> proc=0
runpri=32, usrpri=73, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800045fef240,0xffff800045feed20
process=0xffff800045ff04e0 user=0xffff800032371000, vmspace=0xfffffa807d5745d0
estcpu=23, cpticks=13, pctcpu=0.5, user=1, sys=12, intr=0
ddb{1}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
38294 262363 78200 32767 2 0x10 0 syz-executor
38294 29285 78200 32767 3 0x10 0x4000080 fsleep syz-executor
96380 488616 81775 32767 2 0x10 0 syz-executor
96380 194709 81775 32767 3 0x10 0x4000080 fsleep syz-executor
22153 338925 9584 32767 2 0x10 0 syz-executor
22153 164613 9584 32767 2 0x10 0x4000000 syz-executor
53012 189139 86770 32767 7 0x10 0 syz-executor
53012 359620 86770 32767 3 0x10 0x4000080 lockf syz-executor
16922 337193 24683 32767 2 0x10 0 syz-executor
16922 302499 24683 32767 3 0x10 0x4000080 piperd syz-executor
16922 494032 24683 32767 3 0x10 0x4000080 fsleep syz-executor
45297 406851 91071 32767 3 0x10 0x80 nanoslp syz-executor
45297 31303 91071 32767 3 0x10 0x4000080 kqread syz-executor
45297 524184 91071 32767 3 0x10 0x4000080 fsleep syz-executor
9584 190677 16149 32767 3 0x10 0x80 nanoslp syz-executor
16149 215938 59101 0 3 0x2 0x80 wait syz-executor
86770 53788 58708 32767 3 0x10 0x80 nanoslp syz-executor
20692 148040 23270 32767 2 0x10000010 0xc80 syz-executor
81775 416368 17925 32767 3 0x10 0x80 nanoslp syz-executor
91071 213121 83032 32767 3 0x10 0x80 nanoslp syz-executor
78200 162940 19301 32767 3 0x10 0x80 nanoslp syz-executor
24683 310511 66527 32767 3 0x10 0x80 nanoslp syz-executor
*62873 114165 68825 32767 7 0x10000010 0 syz-executor
68825 253939 59101 0 3 0x2 0x80 wait syz-executor
83032 190625 59101 0 3 0x2 0x80 wait syz-executor
66527 90579 59101 0 3 0x2 0x80 wait syz-executor
19301 325025 59101 0 3 0x2 0x80 wait syz-executor
23270 476758 59101 0 3 0x2 0x80 wait syz-executor
58708 17745 59101 0 3 0x2 0x80 wait syz-executor
17925 150740 59101 0 3 0x2 0x80 wait syz-executor
59101 82060 7347 0 3 0x2 0x80 kqread syz-executor
7347 201163 39538 0 3 0x100002 0x88 sigsusp ksh
39538 451427 54820 0 3 0x10 0x88 kqread sshd-session
54820 193792 48751 0 3 0x12 0x80 kqread sshd-session
22163 479862 1 0 3 0x100003 0x80 ttyin getty
48751 11201 1 0 3 0 0x88 kqread sshd
29015 238535 29817 73 3 0x1100010 0x80 kqread syslogd
29817 86721 1 0 3 0x100002 0x80 sbwait syslogd
88032 496402 1 0 3 0x100000 0x80 kqread resolvd
28705 382848 91233 77 3 0x100012 0x80 kqread dhcpleased
44161 351893 91233 77 3 0x100012 0x80 kqread dhcpleased
91233 348780 1 0 3 0 0x80 kqread dhcpleased
26518 372845 0 0 3 0x14000 0x200 bored smr
89144 219 0 0 2 0x14000 0x200 zerothread
52726 260096 0 0 3 0x14000 0x200 aiodoned aiodoned
75681 391988 0 0 3 0x14000 0x200 syncer update
29563 235757 0 0 3 0x14000 0x200 cleaner cleaner
91953 400564 0 0 3 0x14000 0x200 reaper reaper
88621 76520 0 0 3 0x14000 0x200 pgdaemon pagedaemon
3629 332332 0 0 3 0x14000 0x200 bored viomb
41579 137272 0 0 3 0x14000 0x40000200 acpi0 acpi0
35307 435400 0 0 3 0x14000 0x40000200 idle1
84489 157039 0 0 3 0x14000 0x200 bored softnet1
67278 396203 0 0 2 0x14000 0x200 softnet0
77380 343050 0 0 3 0x14000 0x200 bored systqmp
96703 127927 0 0 3 0x14000 0x200 bored systq
95887 265343 0 0 3 0x14000 0x200 tmoslp softclockmp
84392 207090 0 0 3 0x14000 0x40000200 tmoslp softclock
93718 328692 0 0 3 0x14000 0x40000200 idle0
1 322155 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex /syzkaller/managers/setuid/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff83937bd8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 malloc+0x2ef sys/kern/kern_malloc.c:200
#3 sysctl_sysvipc+0x471 sys/kern/kern_sysctl.c:2766
#4 kern_sysctl+0x139 sys/kern/kern_sysctl.c:736
#5 sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#7 Xsyscall+0x128
Process 53012 (syz-executor) thread 0xffff80003afaf4e8 (189139)
exclusive rwlock amaplk r = 0 (0xfffffa800e0ea770)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834
#3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194
#5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648
#6 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffa806d0006e0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648
#7 recall_trap+0x8
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11054 12019K 12034K 166960K 12148 0
pcb 17 12K 12K 166960K 17 0
rtable 239 6K 7K 166960K 394 0
pf 31 16K 16K 166960K 33 0
ifaddr 42 7K 7K 166960K 48 0
ifgroup 50 2K 2K 166960K 54 0
sysctl 3 1K 9K 166960K 8 0
counters 70 37K 37K 166960K 72 0
ioctlops 0 0K 4K 166960K 42 0
iov 1 1K 16K 166960K 20 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1287 81K 81K 166960K 1440 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 8 0
VM map 2 1K 1K 166960K 2 0
sem 12 1K 1K 166960K 14 0
dirhash 12 2K 2K 166960K 21 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 24 89K 125K 166960K 378 0
sigio 0 0K 0K 166960K 10 0
proc 58 99K 163K 166960K 546 0
subproc 72 4K 4K 166960K 81 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 38 0
in_multi 99 6K 6K 166960K 119 0
ether_multi 1 0K 0K 166960K 3 0
mrt 0 0K 0K 166960K 10 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 85 387K 387K 166960K 85 0
exec 0 0K 1K 166960K 395 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 247 168K 220K 166960K 5300 0
UVM aobj 72 3K 3K 166960K 72 0
pinsyscall 45 90K 118K 166960K 1524 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 12 0
NDP 11 0K 2K 166960K 30 0
temp 44 9120K 9130K 166960K 4352 0
kqueue 17 24K 32K 166960K 76 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 28 0 0 1 0 1 1 0 8 0
rtpcb 120 61 0 57 1 0 1 1 0 8 0
rtentry 176 124 0 13 6 0 6 6 0 8 0
unpcb 144 259 0 242 2 0 2 2 0 8 1
syncache 336 12 0 12 1 0 1 1 0 8 1
tcpqe 32 2 0 2 1 0 1 1 0 8 1
tcpcb 736 116 0 109 2 0 2 2 0 8 0
arp 136 20 0 2 1 0 1 1 0 8 0
ipq 40 3 0 0 1 0 1 1 0 8 0
ipqe 40 7 0 1 1 0 1 1 0 8 0
inpcb 328 419 0 408 7 0 7 7 0 8 5
ip6q 80 3 0 1 1 0 1 1 0 8 0
ip6af 40 3 0 2 1 0 1 1 0 8 0
nd6 152 29 0 4 1 0 1 1 0 8 0
kcovpl 48 9 0 1 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 513 0 46 30 0 30 30 0 8 0
art_table 40 514 0 46 5 0 5 5 0 8 0
art_node 32 124 0 23 1 0 1 1 0 8 0
sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0
semupl 112 2 0 2 1 0 1 1 0 8 1
semapl 72 11 0 1 1 0 1 1 0 8 0
shmpl 112 69 0 0 2 0 2 2 0 8 0
dirhash 1024 23 0 6 3 0 3 3 0 8 0
dino2pl 256 1945 0 479 93 0 93 93 0 8 0
ffsino 296 1945 0 479 114 0 114 114 0 8 0
nchpl 144 2465 0 774 64 0 64 64 0 8 0
vnodes 216 2035 0 0 114 0 114 114 0 8 0
namei 1024 8568 0 8568 2 1 1 2 0 8 1
percpumem 16 52 0 1 1 0 1 1 0 8 0
kstatmem 264 27 0 2 2 0 2 2 0 8 0
scxspl 216 7965 0 7965 4 3 1 3 1 8 1
plimitpl 152 75 0 48 2 0 2 2 0 8 0
sigapl 424 675 0 621 7 0 7 7 0 8 0
knotepl 120 97 0 0 3 0 3 3 0 8 0
kqueuepl 224 148 0 135 5 0 5 5 0 8 4
pipepl 344 176 0 148 6 0 6 6 0 8 3
fdescpl 528 659 0 623 4 0 4 4 0 8 1
filepl 160 3547 0 3329 13 0 13 13 0 8 2
lockfpl 104 60 0 56 1 0 1 1 0 8 0
lockfspl 48 26 0 23 1 0 1 1 0 8 0
sessionpl 144 38 0 22 1 0 1 1 0 8 0
pgrppl 48 48 0 24 1 0 1 1 0 8 0
ucredpl 104 617 0 598 1 0 1 1 0 8 0
zombiepl 144 623 0 621 1 0 1 1 0 8 0
processpl 1232 675 0 621 5 0 5 5 0 8 0
procpl 664 1057 0 995 7 0 7 7 0 8 0
sosppl 176 5 0 5 1 0 1 1 0 8 1
sockpl 752 742 0 710 11 0 11 11 0 8 6
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 128 0 0 16 0 16 16 0 8 0
mcl2k 2048 27 0 0 4 0 4 4 0 8 0
mextrefs 64 27 0 0 1 0 1 1 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 275 0 0 18 0 18 18 0 8 0
bufpl 272 2608 0 102 168 0 168 168 0 8 0
anonpl 32 9501 0 0 77 0 77 77 0 247 0
amapchunkpl 152 28313 0 27765 36 0 36 36 0 158 9
amappl16 200 2290 0 2262 11 0 11 11 0 8 8
amappl15 192 5 0 5 1 1 0 1 0 8 0
amappl14 184 413 0 412 1 0 1 1 0 8 0
amappl13 176 133 0 123 1 0 1 1 0 8 0
amappl12 168 901 0 866 2 0 2 2 0 8 0
amappl11 160 7 0 7 1 1 0 1 0 8 0
amappl10 152 60 0 50 1 0 1 1 0 8 0
amappl9 144 278 0 278 1 1 0 1 0 8 0
amappl8 136 93 0 92 1 0 1 1 0 8 0
amappl7 128 151 0 140 1 0 1 1 0 8 0
amappl6 120 159 0 157 1 0 1 1 0 8 0
amappl5 112 110 0 101 1 0 1 1 0 8 0
amappl4 104 283 0 266 1 0 1 1 0 8 0
amappl3 96 2713 0 2609 5 1 4 4 0 8 0
amappl2 88 833 0 756 3 0 3 3 0 8 0
amappl1 80 13385 0 12820 22 0 22 22 0 8 4
amappl 88 4519 0 4335 6 0 6 6 0 92 0
uvmvnodes 80 103 0 0 3 0 3 3 0 8 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 71 0 0 2 0 2 2 0 8 0
uaddrrnd 24 659 0 623 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 659 0 623 1 0 1 1 0 8 0
vmmpekpl 168 8188 0 8145 3 0 3 3 0 8 1
vmmpepl 168 54300 0 52286 128 0 128 128 0 357 20
vmsppl 488 658 0 623 7 1 6 6 0 8 0
rwobjpl 80 19482 0 18462 35 1 34 35 0 8 5
pdppl 4096 1325 0 1246 121 26 95 97 0 8 16
pvpl 32 17826 0 0 144 0 144 144 0 265 0
pmappl 256 658 0 623 4 1 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 469 0 30 13 0 13 13 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff839d9ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83abdc00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83abdc00) at __mp_lock+0x192 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(20) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(70) at db_putchar+0x182 db_force_whitespace sys/ddb/db_output.c:-1 [inline]
db_putchar(70) at db_putchar+0x182 sys/ddb/db_output.c:153
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff834b31fe) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,0,ffff800039bac320) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,0,ffff800039bac320) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff800039bac320) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:523
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
end trace frame: 0xffff800039bac460, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff839d9ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83abdc00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83abdc00) at __mp_lock+0x192 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(20) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(70) at db_putchar+0x182 db_force_whitespace sys/ddb/db_output.c:-1 [inline]
db_putchar(70) at db_putchar+0x182 sys/ddb/db_output.c:153
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff834b31fe) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,0,ffff800039bac320) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,0,ffff800039bac320) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff800039bac320) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:523
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
amap_lookups(fffffa806d042890,29000,ffff800039bac510,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:120 [inline]
amap_lookups(fffffa806d042890,29000,ffff800039bac510,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1170
uvm_fault_check(ffff800039bac610,ffff800039bac648,ffff800039bac680,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840
uvm_fault(fffffa806d0005e0,df7e15a7000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627
upageflttrap(ffff800039bac7b0,df7e15a7000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194
usertrap(ffff800039bac7b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:648
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x792cdb4b6bc0, count: -20
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xae: movl $0,%gs:0x688
savectx() at savectx+0xae
end of kernel
end trace frame: 0x73b34598cce0, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x73b34598cce0, count: -1