syzbot
uvm_fault: x86_ipi_db (9)
Status:
upstream: reported on 2025/02/14 23:55
Reported-by: syzbot+a157c6e0d81b4f6b71a4@syzkaller.appspotmail.com
First crash: 538d, last: 1h45m
Sample crash report:
*cpu1: uvm_fault(0xffffee007275e5d0, 0x98, 0, 1) -> e
ddb{0}> show kasan
No such command
ddb{0}> trace
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x7178969fb2e0, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800039fabda0
rbx 0
rdx 0
rcx 0xffff80003c3df780
rax 0x2a
r8 0xffff800039fabcd0
r9 0x1
r10 0xfc49c55c8d9d2680
r11 0xfdd87d97f40ec5d6
r12 0
r13 0
r14 0
r15 0
rip 0xffffffff8312f4c7 proc_trampoline+0xc7
cs 0x8
rflags 0x246
rsp 0xffff800039fabd20
ss 0
proc_trampoline+0xc7: movl $0,%gs:0x688
ddb{0}> show proc
PROC (syz-executor) tid=61492 pid=59674 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=72, usrpri=72, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003c3df250,0xffff80003c3de2d0
process=0xffff80003abb5d00 user=0xffff800039fa6000, vmspace=0xffffee007275e3e8
estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
*59674 61492 3885 0 7 0 0 syz-executor
59674 69297 3885 0 3 0 0x4000080 fsleep syz-executor
33642 139875 13895 0 2 0 0 syz-executor
33642 85854 13895 0 3 0 0x4000000 physio syz-executor
19344 39199 25639 0 2 0 0 syz-executor
19344 467720 25639 0 2 0 0x4000000 syz-executor
19344 502426 25639 0 2 0 0x4000000 syz-executor
48930 235095 97179 0 2 0 0 syz-executor
48930 187463 97179 0 2 0 0x4000000 syz-executor
48930 89615 97179 0 7 0 0x4000000 syz-executor
28295 75417 81273 0 2 0 0 syz-executor
28295 381209 81273 0 3 0 0x4000080 fsleep syz-executor
25507 93700 95021 0 2 0 0 syz-executor
25507 105708 95021 0 3 0 0x4000080 fsleep syz-executor
51412 312134 81957 0 2 0 0 syz-executor
51412 188145 81957 0 3 0 0x4000080 fsleep syz-executor
51412 280429 81957 0 3 0 0x4000080 fsleep syz-executor
182 345904 69218 0 2 0x10000002 0 syz-executor
3885 273206 69218 0 3 0x2 0x80 nanoslp syz-executor
81957 438996 69218 0 3 0x2 0x80 nanoslp syz-executor
81273 351177 69218 0 3 0x2 0x80 nanoslp syz-executor
97179 33078 69218 0 3 0x2 0x80 nanoslp syz-executor
95021 475762 69218 0 3 0x2 0x80 nanoslp syz-executor
25639 350173 69218 0 3 0x2 0x80 nanoslp syz-executor
13895 341385 69218 0 3 0x2 0x80 nanoslp syz-executor
69218 55923 27042 0 3 0x2 0x80 kqread syz-executor
27042 4121 9881 0 3 0x100002 0x88 sigsusp ksh
9881 476938 77548 0 3 0x10 0x88 kqread sshd-session
77548 426426 17575 0 3 0x12 0x80 kqread sshd-session
40217 511416 1 0 3 0x100003 0x80 ttyin getty
17575 130731 1 0 3 0 0x88 kqread sshd
27937 121460 34505 74 3 0x1100012 0x80 bpf pflogd
34505 417553 1 0 3 0 0x80 sbwait pflogd
50752 374603 44128 73 3 0x1100010 0x80 kqread syslogd
44128 418337 1 0 3 0x100002 0x80 sbwait syslogd
40484 83347 1 0 3 0x100000 0x80 kqread resolvd
99694 400002 36060 77 3 0x100012 0x80 kqread dhcpleased
13648 95705 36060 77 3 0x100012 0x80 kqread dhcpleased
36060 330993 1 0 3 0 0x80 kqread dhcpleased
21765 351061 0 0 3 0x14000 0x200 pause smr
46637 445815 0 0 2 0x14000 0x200 zerothread
86475 518615 0 0 3 0x14000 0x200 aiodoned aiodoned
73230 106057 0 0 3 0x14000 0x200 syncer update
223 306131 0 0 3 0x14000 0x200 cleaner cleaner
2185 159006 0 0 3 0x14000 0x200 reaper reaper
79127 2514 0 0 3 0x14000 0x200 pgdaemon pagedaemon
71121 384948 0 0 3 0x14000 0x200 bored viomb
3487 124987 0 0 3 0x14000 0x40000200 acpi0 acpi0
71621 513808 0 0 3 0x14000 0x40000200 idle1
34316 123205 0 0 3 0x14000 0x200 bored softnet1
99958 262548 0 0 3 0x14000 0x200 bored softnet0
11092 12165 0 0 3 0x14000 0x200 smrbar systqmp
72085 97782 0 0 3 0x14000 0x200 bored systq
9261 123996 0 0 3 0x14000 0x200 tmoslp softclockmp
26262 174276 0 0 3 0x14000 0x40000200 tmoslp softclock
89552 308710 0 0 3 0x14000 0x40000200 idle0
1 119202 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &pmap->pm_mtx r = 0 (0xffffee006cccff10)
#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 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline]
#2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777
#3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1
#4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
#5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
#6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#7 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#8 recall_trap+0x8
Process 59674 (syz-executor) thread 0xffff80003c3df780 (61492)
shared rwlock uobjlk r = 0 (0xffffee006e15b9a0)
#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 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204
#3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
#4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#7 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xffffee007275e4e8)
#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:192
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#7 recall_trap+0x8
exclusive mutex &pmap->pm_mtx r = 0 (0xffffee006cccff10)
#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 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline]
#2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777
#3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1
#4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
#5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
#6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#7 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#8 recall_trap+0x8
Process 33642 (syz-executor) thread 0xffff80003c3de7f0 (85854)
shared rwlock vmmaplk r = 0 (0xffffee007275eaa0)
#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 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:173
#3 physio+0x257 sys/kern/kern_physio.c:139
#4 spec_write+0x11f sys/kern/spec_vnops.c:302
#5 VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
#6 vn_write+0x1d3 sys/kern/vfs_vnops.c:414
#7 dofilewritev+0x2bd sys/kern/sys_generic.c:384
#8 sys_write+0xa2 sys/kern/sys_generic.c:300
#9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#10 Xsyscall+0x128
Process 48930 (syz-executor) thread 0xffff80003a3b2550 (89615)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a32680)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
#1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783
#2 Xsyscall+0x128
Process 11092 (systqmp) thread 0xffff800045ffe7c8 (12165)
shared rwlock systqmp r = 0 (0xffffffff839aa258)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11058 12095K 12214K 166960K 12217 0
pcb 17 14K 16K 166960K 111 0
rtable 225 6K 7K 166960K 367 0
pf 35 17K 24K 166960K 71 0
ifaddr 41 7K 7K 166960K 47 0
ifgroup 55 2K 2K 166960K 57 0
sysctl 1 1K 9K 166960K 5 0
counters 70 37K 37K 166960K 72 0
ioctlops 0 0K 4K 166960K 1502 0
iov 0 0K 16K 166960K 5 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1310 82K 82K 166960K 1427 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 3 0
VM map 2 1K 1K 166960K 2 0
sem 5 0K 0K 166960K 39 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 17 61K 93K 166960K 188 0
sigio 0 0K 0K 166960K 2 0
proc 71 115K 164K 166960K 559 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 3 0
in_multi 94 6K 6K 166960K 107 0
ether_multi 1 0K 0K 166960K 2 0
mrt 0 0K 0K 166960K 2 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 67 307K 307K 166960K 67 0
exec 0 0K 1K 166960K 387 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 235 159K 173K 166960K 3609 0
UVM aobj 4 2K 2K 166960K 4 0
pinsyscall 42 84K 105K 166960K 1344 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 1 0
NDP 12 0K 2K 166960K 30 0
temp 35 9114K 9120K 166960K 7233 0
kqueue 14 22K 24K 166960K 40 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> 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 35 0 32 1 0 1 1 0 8 0
rtentry 176 118 0 14 6 0 6 6 0 8 0
unpcb 144 66 0 48 1 0 1 1 0 8 0
syncache 336 4 0 4 1 0 1 1 0 8 1
tcpcb 736 20 0 13 1 0 1 1 0 8 0
arp 136 20 0 1 1 0 1 1 0 8 0
inpcb 328 173 0 163 7 0 7 7 0 8 5
nd6 152 25 0 3 1 0 1 1 0 8 0
pkpcb 40 1 0 1 1 0 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 1 0 1 1 0 1 1 0 8 1
pfstscr 40 2 0 2 1 0 1 1 0 8 1
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 1 0 0 1 0 1 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
pfanchor 1288 6 0 0 1 0 1 1 0 8 0
pfstitem 24 24 0 0 1 0 1 1 0 8 0
pfstkey 128 25 0 1 1 0 1 1 0 8 0
pfstate 448 25 0 1 3 0 3 3 0 8 0
pfrule 1360 22 0 17 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 477 0 46 30 0 30 30 0 8 1
art_table 40 478 0 46 5 0 5 5 0 8 0
art_node 32 118 0 24 1 0 1 1 0 8 0
semapl 72 36 0 33 1 0 1 1 0 8 0
shmpl 112 1 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1666 0 196 93 0 93 93 0 8 0
ffsino 296 1666 0 196 114 0 114 114 0 8 0
nchpl 144 1934 0 223 64 0 64 64 0 8 0
vnodes 216 1799 0 0 100 0 100 100 0 8 0
namei 1024 6297 0 6297 2 0 2 2 0 8 2
percpumem 16 52 0 1 1 0 1 1 0 8 0
kstatmem 264 29 0 2 2 0 2 2 0 8 0
scxspl 216 6725 0 6724 4 3 1 3 1 8 0
plimitpl 152 36 0 19 1 0 1 1 0 8 0
sigapl 424 505 0 457 7 0 7 7 0 8 1
knotepl 120 282 0 0 9 0 9 9 0 8 0
kqueuepl 224 38 0 27 1 0 1 1 0 8 0
pipepl 344 129 0 101 3 0 3 3 0 8 0
fdescpl 528 489 0 458 3 0 3 3 0 8 0
filepl 160 2008 0 1782 13 0 13 13 0 8 2
lockfpl 104 21 0 18 1 0 1 1 0 8 0
lockfspl 48 12 0 9 1 0 1 1 0 8 0
sessionpl 144 26 0 17 1 0 1 1 0 8 0
pgrppl 48 35 0 18 1 0 1 1 0 8 0
ucredpl 104 167 0 154 1 0 1 1 0 8 0
zombiepl 144 458 0 457 1 0 1 1 0 8 0
processpl 1232 505 0 457 5 0 5 5 0 8 0
procpl 664 615 0 557 6 0 6 6 0 8 0
sockpl 752 276 0 245 11 0 11 11 0 8 7
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 7 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 119 0 0 15 0 15 15 0 8 0
mcl2k 2048 25 0 0 4 0 4 4 0 8 0
mextrefs 64 24 0 0 1 0 1 1 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 139 0 0 9 0 9 9 0 8 0
bufpl 272 2480 0 105 159 0 159 159 0 8 0
anonpl 32 5381 0 0 44 0 44 44 0 247 0
amapchunkpl 152 10397 0 9884 28 0 28 28 0 158 7
amappl16 200 1863 0 1831 5 1 4 5 0 8 2
amappl15 192 9 0 9 1 1 0 1 0 8 0
amappl14 184 434 0 432 1 0 1 1 0 8 0
amappl13 176 135 0 123 1 0 1 1 0 8 0
amappl12 168 737 0 707 2 0 2 2 0 8 0
amappl11 160 6 0 6 1 1 0 1 0 8 0
amappl10 152 82 0 68 1 0 1 1 0 8 0
amappl9 144 277 0 276 1 0 1 1 0 8 0
amappl8 136 100 0 97 1 0 1 1 0 8 0
amappl7 128 146 0 133 1 0 1 1 0 8 0
amappl6 120 165 0 164 1 0 1 1 0 8 0
amappl5 112 128 0 118 1 0 1 1 0 8 0
amappl4 104 308 0 289 1 0 1 1 0 8 0
amappl3 96 1768 0 1666 3 0 3 3 0 8 0
amappl2 88 606 0 529 2 0 2 2 0 8 0
amappl1 80 10590 0 9981 15 0 15 15 0 8 2
amappl 88 2878 0 2714 5 0 5 5 0 92 1
uvmvnodes 80 101 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 3 0 0 1 0 1 1 0 8 0
uaddrrnd 24 489 0 458 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 489 0 458 1 0 1 1 0 8 0
vmmpekpl 168 6037 0 6001 2 0 2 2 0 8 0
vmmpepl 168 40924 0 39003 87 0 87 87 0 357 2
vmsppl 488 488 0 458 5 0 5 5 0 8 1
rwobjpl 80 15207 0 14162 24 0 24 24 0 8 0
pdppl 4096 985 0 916 97 24 73 87 0 8 4
pvpl 32 11499 0 0 93 0 93 93 0 265 0
pmappl 256 488 0 458 3 0 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 429 0 27 12 0 12 12 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x7178969fb2e0, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff80002999dff0) 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
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670
comcnputc(800,a) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline]
comcnputc(800,a) at comcnputc+0x250 sys/dev/ic/com.c:1274
cnputc(a) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168
kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723
db_printf(ffffffff834612c2) at db_printf+0x9b sys/kern/subr_prf.c:-1
fault(ffffffff835261f6) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161
kpageflttrap(ffff80003078b970,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296
kerntrap(ffff80003078b970) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dovutimens(ffff80003a3b2550,ffffee00606dde90,ffff80003078bb50) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691
end trace frame: 0xffff80003078bbc0, count: 0
ddb{1}> trace
x86_ipi_db(ffff80002999dff0) 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
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670
comcnputc(800,a) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline]
comcnputc(800,a) at comcnputc+0x250 sys/dev/ic/com.c:1274
cnputc(a) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168
kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723
db_printf(ffffffff834612c2) at db_printf+0x9b sys/kern/subr_prf.c:-1
fault(ffffffff835261f6) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161
kpageflttrap(ffff80003078b970,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296
kerntrap(ffff80003078b970) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dovutimens(ffff80003a3b2550,ffffee00606dde90,ffff80003078bb50) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691
sys_futimes(ffff80003a3b2550,ffff80003078bca0,ffff80003078bbf0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733
syscall(ffff80003078bca0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003078bca0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf0cfdcbbd80, count: -17
Struck through repros no longer work on HEAD.