login: panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1643 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 3123 29528 32767 0x10 0x4000000 1 syz-executor.7 * 2710 29528 32767 0x10 0x4000000 0K syz-executor.7 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258994d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825fb409,ffffffff825563ec,66b,ffffffff82565630) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806a86db98,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806a86db98,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff800025ab7cf0,ffff80002af4f2c8,ffff80002af4f320) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002af4f390) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af4f390) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40d9cd6ceb0, 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 1643 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258994d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825fb409,ffffffff825563ec,66b,ffffffff82565630) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806a86db98,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806a86db98,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff800025ab7cf0,ffff80002af4f2c8,ffff80002af4f320) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002af4f390) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af4f390) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40d9cd6ceb0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002af4f050 rbx 0xffffffff82959bff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff800025ab7cf0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x649da54144991d14 r11 0x746fac68af08b5ba r12 0xffffffff82959a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff815cd198 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002af4f040 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.7) pid=2710 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800025ab62b0,0xffff800025ab7a60 process=0xffff80002a326588 user=0xffff80002af4a000, vmspace=0xfffffd806a86db98 estcpu=29, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16388 179162 5808 32767 2 0x10 syz-executor.6 16388 97028 5808 32767 2 0x4000010 syz-executor.6 16388 216851 5808 32767 2 0x4000010 syz-executor.6 16388 507487 5808 32767 2 0x4000010 syz-executor.6 16388 83055 5808 32767 2 0x4000010 syz-executor.6 29528 412276 72046 32767 2 0x10 syz-executor.7 29528 292807 72046 32767 3 0x4000090 fsleep syz-executor.7 29528 3123 72046 32767 7 0x4000010 syz-executor.7 *29528 2710 72046 32767 7 0x4000010 syz-executor.7 90729 260338 8030 32767 2 0x10 syz-executor.1 90729 181752 8030 32767 3 0x4000090 fsleep syz-executor.1 96959 427163 10234 32767 2 0x10 syz-executor.3 96959 459741 10234 32767 3 0x4000090 fsleep syz-executor.3 69865 13107 43339 32767 2 0x10 syz-executor.2 69865 508103 43339 32767 3 0x4000090 fsleep syz-executor.2 56560 396219 50371 32767 2 0x10 syz-executor.5 56560 201005 50371 32767 3 0x4000090 fsleep syz-executor.5 56560 15158 50371 32767 2 0x4000010 syz-executor.5 57632 264039 94738 32767 2 0x10 syz-executor.4 57632 31209 94738 32767 3 0x4000090 fsleep syz-executor.4 38807 314334 0 0 3 0x14200 bored sosplice 50371 442958 3365 32767 3 0x90 nanoslp syz-executor.5 3365 44153 80129 0 3 0x82 wait syz-executor.5 72046 244336 68308 32767 2 0x490 syz-executor.7 68308 354852 80129 0 3 0x82 wait syz-executor.7 43339 215555 72949 32767 3 0x90 nanoslp syz-executor.2 5808 128716 58810 32767 3 0x90 nanoslp syz-executor.6 58810 358194 80129 0 3 0x82 wait syz-executor.6 94738 485457 33863 32767 3 0x90 nanoslp syz-executor.4 10234 92655 87193 32767 3 0x90 nanoslp syz-executor.3 8030 186815 90927 32767 2 0x490 syz-executor.1 33863 122585 80129 0 3 0x82 wait syz-executor.4 17830 43700 12004 32767 2 0x10 syz-executor.0 72949 367995 80129 0 3 0x82 wait syz-executor.2 87193 69780 80129 0 3 0x82 wait syz-executor.3 90927 25422 80129 0 3 0x82 wait syz-executor.1 12004 406932 80129 0 3 0x82 wait syz-executor.0 80129 487320 97169 0 3 0x82 thrsleep syz-fuzzer 80129 62961 97169 0 3 0x4000082 thrsleep syz-fuzzer 80129 300308 97169 0 3 0x4000082 kqread syz-fuzzer 80129 172364 97169 0 3 0x4000082 thrsleep syz-fuzzer 80129 66864 97169 0 3 0x4000082 thrsleep syz-fuzzer 80129 410831 97169 0 3 0x4000082 thrsleep syz-fuzzer 80129 338151 97169 0 3 0x4000082 thrsleep syz-fuzzer 80129 465401 97169 0 3 0x4000082 thrsleep syz-fuzzer 97169 163449 79717 0 3 0x10008a sigsusp ksh 79717 517571 3704 0 3 0x9a kqread sshd 11380 352020 1 0 3 0x100083 ttyin getty 3704 369746 1 0 3 0x88 kqread sshd 10190 196333 34747 73 3 0x1100090 kqread syslogd 34747 437499 1 0 3 0x100082 netio syslogd 39367 69862 1 0 3 0x100080 kqread resolvd 53150 100832 33517 77 3 0x100092 kqread dhcpleased 98720 313809 33517 77 3 0x100092 kqread dhcpleased 33517 366812 1 0 3 0x80 kqread dhcpleased 89428 85190 0 0 3 0x14200 bored smr 98681 398604 0 0 2 0x14200 zerothread 87173 57662 0 0 3 0x14200 aiodoned aiodoned 7739 441147 0 0 3 0x14200 syncer update 74285 325038 0 0 3 0x14200 cleaner cleaner 58332 78295 0 0 3 0x14200 reaper reaper 34665 116490 0 0 3 0x14200 pgdaemon pagedaemon 7148 457297 0 0 3 0x14200 bored viomb 30066 357479 0 0 3 0x40014200 acpi0 acpi0 90663 214248 0 0 3 0x40014200 idle1 89682 27505 0 0 3 0x14200 bored softnet 37666 294813 0 0 3 0x14200 bored systqmp 13978 302544 0 0 3 0x14200 bored systq 20128 40142 0 0 2 0x40014200 softclock 41582 299569 0 0 3 0x40014200 idle0 1 164935 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 29528 (syz-executor.7) thread 0xffff800025ab62b0 (3123) exclusive rwlock futex r = 0 (0xffffffff8299cf30) #0 witness_lock+0x44d #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 29528 (syz-executor.7) thread 0xffff800025ab7cf0 (2710) exclusive rwlock amaplk r = 0 (0xfffffd80660639b8) #0 witness_lock+0x44d #1 uvm_map_lock_entry+0x36 sys/uvm/uvm_map.c:508 #2 uvm_fault_unwire_locked+0x1e8 sys/uvm/uvm_fault.c:1655 #3 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 #4 sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffffd806a86dbb0) #0 witness_lock+0x44d #1 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1600 #2 sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 #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 (0xffffffff82b70a90) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x198 sys/kern/kern_synch.c:437 #4 rw_enter+0x35a sys/kern/kern_rwlock.c:286 #5 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #6 uvmfault_lookup+0xb9 sys/uvm/uvm_fault.c:1752 #7 uvm_fault_check+0x603 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #7 uvm_fault_check+0x603 sys/uvm/uvm_fault.c:712 #8 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #9 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1580 #10 sys_sysctl+0x2d8 sys/kern/kern_sysctl.c:240 #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 (0xffffffff82925760) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:233 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10176 6407K 6419K 78643K 11266 0 pcb 13 10K 12K 78643K 15 0 rtable 240 6K 7K 78643K 379 0 ifaddr 81 16K 16K 78643K 82 0 counters 56 35K 35K 78643K 56 0 ioctlops 0 0K 2K 78643K 33 0 iov 0 0K 20K 78643K 145 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1270 79K 79K 78643K 1489 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 143 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 121K 78643K 897 0 sigio 0 0K 0K 78643K 126 0 proc 56 74K 111K 78643K 477 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 631 0 in_multi 99 6K 6K 78643K 105 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 2K 78643K 671 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 346 84K 84K 78643K 13088 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 55 0 NDP 11 0K 2K 78643K 27 0 temp 124 4703K 4767K 78643K 5835 0 kqueue 12 18K 22K 78643K 70 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 120 104 0 101 2 1 1 2 0 8 0 rtentry 112 112 0 1 4 0 4 4 0 8 0 unpcb 136 737 0 724 12 11 1 9 0 8 0 syncache 296 8 0 8 2 2 0 1 0 8 0 tcpqe 32 39 0 39 1 1 0 1 0 8 0 tcpcb 736 913 0 909 23 14 9 13 0 8 8 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 304 1152 0 1145 19 10 9 11 0 8 8 ip6q 72 5 0 4 2 1 1 1 0 8 0 ip6af 40 9 0 8 2 1 1 1 0 8 0 nd6 48 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 455 0 0 29 0 29 29 0 8 0 art_table 32 456 0 0 4 0 4 4 0 8 0 art_node 16 111 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 11 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 141 0 131 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2721 0 1292 90 0 90 90 0 8 0 ffsino 272 2721 0 1292 96 0 96 96 0 8 0 nchpl 144 4042 0 2380 62 0 62 62 0 8 0 uvmvnodes 80 2834 0 0 58 0 58 58 0 8 0 vnodes 224 2834 0 0 167 0 167 167 0 8 0 namei 1024 13239 0 13239 2 1 1 2 0 8 1 percpumem 16 40 0 0 1 0 1 1 0 8 0 scxspl 216 11869 0 11869 11 8 3 8 0 8 3 plimitpl 152 159 0 136 2 1 1 2 0 8 0 sigapl 424 1182 0 1130 7 0 7 7 0 8 0 futexpl 64 8505 0 8498 1 0 1 1 0 8 0 knotepl 120 116 0 0 4 0 4 4 0 8 0 kqueuepl 216 144 0 135 3 0 3 3 0 8 2 pipepl 336 370 0 342 8 4 4 8 0 8 1 fdescpl 496 1167 0 1131 7 1 6 6 0 8 0 filepl 152 7692 0 7456 20 4 16 18 0 8 6 lockfpl 104 578 0 575 1 0 1 1 0 8 0 lockfspl 48 212 0 209 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 109 0 93 1 0 1 1 0 8 0 ucredpl 96 1225 0 1207 1 0 1 1 0 8 0 zombiepl 144 1131 0 1130 1 0 1 1 0 8 0 processpl 1064 1182 0 1130 5 1 4 4 0 8 0 procpl 672 2840 0 2768 9 2 7 8 0 8 1 sosppl 168 5 0 5 1 0 1 1 0 8 1 sockpl 480 2000 0 1977 61 50 11 32 0 8 8 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 152 0 0 18 0 18 18 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1457 0 0 91 0 91 91 0 8 0 bufpl 288 5068 0 141 352 0 352 352 0 8 0 anonpl 24 285322 0 270754 110 18 92 104 0 186 3 amapchunkpl 152 30629 0 29799 40 5 35 35 0 158 3 amappl16 200 2527 0 2159 31 11 20 28 0 8 0 amappl15 192 291 0 281 1 0 1 1 0 8 0 amappl14 184 108 0 104 1 0 1 1 0 8 0 amappl13 176 182 0 179 1 0 1 1 0 8 0 amappl12 168 19 0 19 1 1 0 1 0 8 0 amappl11 160 342 0 325 1 0 1 1 0 8 0 amappl10 152 47 0 40 1 0 1 1 0 8 0 amappl9 144 585 0 580 1 0 1 1 0 8 0 amappl8 136 594 0 534 3 0 3 3 0 8 0 amappl7 128 114 0 104 1 0 1 1 0 8 0 amappl6 120 309 0 283 2 1 1 2 0 8 0 amappl5 112 1131 0 1109 1 0 1 1 0 8 0 amappl4 104 1219 0 1187 2 1 1 2 0 8 0 amappl3 96 249 0 238 1 0 1 1 0 8 0 amappl2 88 688 0 644 3 1 2 3 0 8 0 amappl1 80 24274 0 23614 18 3 15 18 0 8 0 amappl 88 12607 0 12339 7 0 7 7 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 1167 0 1131 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1167 0 1131 1 0 1 1 0 8 0 vmmpekpl 168 14209 0 14147 4 0 4 4 0 8 0 vmmpepl 168 110106 0 107402 125 3 122 122 0 357 3 vmsppl 368 1166 0 1131 4 0 4 4 0 8 0 rwobjpl 56 30750 0 26447 62 1 61 61 0 8 0 pdppl 4096 2341 0 2262 127 46 81 93 0 8 2 pvpl 32 594981 0 575044 259 42 217 257 0 265 53 pmappl 248 1166 0 1131 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 857 0 67 23 0 23 23 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(ffffffff8258994d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825fb409,ffffffff825563ec,66b,ffffffff82565630) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806a86db98,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806a86db98,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff800025ab7cf0,ffff80002af4f2c8,ffff80002af4f320) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002af4f390) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af4f390) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40d9cd6ceb0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x34 sys/dev/kcov.c:154 __mp_lock(ffffffff82b70888) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b70888) at __mp_lock+0x133 sys/kern/kern_lock.c:147 sleep_setup(ffff80002af494b0,ffff800025ab62b0,120,ffffffff825817e0,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 rwsleep(ffff800025ab62b0,ffffffff8299cf20,120,ffffffff825817e0,0) at rwsleep+0xc0 sys/kern/kern_synch.c:315 futex_wait(40df7784ff0,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff800025ab62b0,ffff80002af49640,ffff80002af496a0) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002af49710) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af49710) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40d6c5526d0, count: 4 ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x34 sys/dev/kcov.c:154 __mp_lock(ffffffff82b70888) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b70888) at __mp_lock+0x133 sys/kern/kern_lock.c:147 sleep_setup(ffff80002af494b0,ffff800025ab62b0,120,ffffffff825817e0,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 rwsleep(ffff800025ab62b0,ffffffff8299cf20,120,ffffffff825817e0,0) at rwsleep+0xc0 sys/kern/kern_synch.c:315 futex_wait(40df7784ff0,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff800025ab62b0,ffff80002af49640,ffff80002af496a0) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002af49710) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af49710) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40d6c5526d0, count: -11