panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1270 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 275909 59967 0 0 0x4000080 1 syz-executor.5 *116814 31314 0 0x14000 0x200 0K reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259ce62) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826140ee,ffffffff8259075c,4f6,ffffffff825c706b) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007812a20) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1270 uvm_fault_unwire_locked(fffffd8069a5fe78,569d4672000,569d4871000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd8069a5fe78,fffffd806aa7d540,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8069a5fe78) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8069a5fe78) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8069a5fe78) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133a48) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 6 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 "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1270 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259ce62) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826140ee,ffffffff8259075c,4f6,ffffffff825c706b) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007812a20) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1270 uvm_fault_unwire_locked(fffffd8069a5fe78,569d4672000,569d4871000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd8069a5fe78,fffffd806aa7d540,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8069a5fe78) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8069a5fe78) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8069a5fe78) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133a48) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800021139000 rbx 0xffffffff8297fc5f cpu_info_full_primary+0x2c5f rdx 0 rcx 0 rax 0xffff800021133a48 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2ff1a383c80261f5 r11 0x172806e826b4ca4c r12 0xffffffff8297fa60 cpu_info_full_primary+0x2a60 r13 0 r14 0 r15 0x1 rip 0xffffffff81b2fb98 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021138ff0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) pid=116814 stat=onproc flags process=14000 proc=200 pri=79, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021133ce8,0xffff8000211337b8 process=0xffff8000ffffd8f0 user=0xffff800021134000, vmspace=0xffffffff82b5fb48 estcpu=36, cpticks=71, pctcpu=9.80 user=0, sys=364, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 59967 123117 1 0 2 0 syz-executor.5 59967 513359 1 0 2 0x4000000 syz-executor.5 59967 275909 1 0 7 0x4000080 syz-executor.5 94784 388516 0 0 3 0x14280 nfsidl nfsio 80503 489078 0 0 3 0x14280 nfsidl nfsio 48146 344321 0 0 3 0x14280 nfsidl nfsio 86800 466832 0 0 3 0x14280 nfsidl nfsio 75852 423568 0 0 3 0x14280 nfsidl nfsio 71967 182400 0 0 3 0x14280 nfsidl nfsio 73170 431919 0 0 3 0x14280 nfsidl nfsio 71594 139725 0 0 3 0x14280 nfsidl nfsio 17194 72096 0 0 3 0x14280 nfsidl nfsio 76338 135722 0 0 3 0x14280 nfsidl nfsio 98970 217819 0 0 3 0x14280 nfsidl nfsio 10450 7145 0 0 3 0x14280 nfsidl nfsio 18684 133361 0 0 3 0x14280 nfsidl nfsio 50911 40522 0 0 3 0x14280 nfsidl nfsio 95318 253410 0 0 3 0x14280 nfsidl nfsio 83023 228825 0 0 3 0x14280 nfsidl nfsio 42503 439812 0 0 3 0x14280 nfsidl nfsio 16044 12694 0 0 3 0x14280 nfsidl nfsio 44103 298810 0 0 3 0x14280 nfsidl nfsio 41557 498556 0 0 3 0x14280 nfsidl nfsio 67016 273277 0 0 3 0x14200 bored sosplice 47383 60676 73869 0 3 0x82 wait syz-executor.7 8145 314573 73869 0 3 0x82 wait syz-executor.2 73869 141414 838 0 3 0x82 wait syz-fuzzer 73869 26297 838 0 2 0x4000482 syz-fuzzer 73869 270430 838 0 3 0x4000082 wait syz-fuzzer 73869 187532 838 0 3 0x4000082 thrsleep syz-fuzzer 73869 471271 838 0 3 0x4000082 thrsleep syz-fuzzer 73869 387527 838 0 3 0x4000082 wait syz-fuzzer 73869 297282 838 0 3 0x4000082 thrsleep syz-fuzzer 73869 150758 838 0 2 0x4000482 syz-fuzzer 73869 159867 838 0 3 0x4000082 thrsleep syz-fuzzer 838 511543 77482 0 3 0x10008a sigsusp ksh 77482 260165 64416 0 3 0x9a kqread sshd 99014 105190 1 0 3 0x100083 ttyin getty 64416 256897 1 0 3 0x88 kqread sshd 19305 210638 67290 74 2 0x1100492 pflogd 67290 419288 1 0 3 0x80 netio pflogd 90504 297710 55634 73 2 0x1100010 syslogd 55634 42688 1 0 3 0x100082 netio syslogd 42850 237712 1 0 3 0x100080 kqread resolvd 89742 158711 55681 77 3 0x100092 kqread dhcpleased 42367 38495 55681 77 3 0x100092 kqread dhcpleased 55681 304160 1 0 3 0x80 kqread dhcpleased 66945 266072 0 0 2 0x14200 smr 24928 4079 0 0 3 0x14200 pgzero zerothread 37338 293663 0 0 3 0x14200 aiodoned aiodoned 82939 492641 0 0 2 0x14600 update 97670 43347 0 0 3 0x14200 cleaner cleaner *31314 116814 0 0 7 0x14200 reaper 82036 142612 0 0 3 0x14200 pgdaemon pagedaemon 98231 16494 0 0 3 0x14200 bored viomb 18928 173815 0 0 3 0x40014200 acpi0 acpi0 48877 191891 0 0 3 0x40014200 idle1 30761 320893 0 0 3 0x14200 bored softnet 82587 5354 0 0 3 0x14200 bored softnet 95268 38244 0 0 3 0x14200 bored softnet 32344 9422 0 0 2 0x14200 softnet 64941 205057 0 0 2 0x14200 systqmp 57736 147401 0 0 2 0x14200 systq 77157 166608 0 0 2 0x40014200 softclock 12657 381799 0 0 3 0x40014200 idle0 1 259327 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 (0xffffffff82b02c50) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x21e sys/uvm/uvm_fault.c:1671 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #7 reaper+0x19a sys/kern/kern_exit.c:454 #8 proc_trampoline+0x1c Process 90504 (syslogd) thread 0xffff8000ffff77b0 (297710) exclusive rrwlock inode r = 0 (0xfffffd806e7e15f0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 sys_fsync+0xf5 sys/kern/vfs_syscalls.c:2924 #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 31314 (reaper) thread 0xffff800021133a48 (116814) exclusive rwlock uobjlk r = 0 (0xfffffd806c517550) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 uvm_fault_unwire_locked+0x1c6 sys/uvm/uvm_fault.c:1659 #3 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #4 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #4 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #5 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #6 reaper+0x19a sys/kern/kern_exit.c:454 #7 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b45880) #0 witness_lock+0x44d #1 uvm_unmap_kill_entry_withlock+0x4c sys/uvm/uvm_map.c:2134 #2 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #2 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #3 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #4 reaper+0x19a sys/kern/kern_exit.c:454 #5 proc_trampoline+0x1c exclusive mutex &uvm.pageqlock r = 0 (0xffffffff82b02c50) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x21e sys/uvm/uvm_fault.c:1671 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #7 reaper+0x19a sys/kern/kern_exit.c:454 #8 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10188 6474K 6777K 78643K 12061 0 pcb 13 12K 14K 78643K 239 0 rtable 183 7K 8K 78643K 381 0 ifaddr 72 15K 18K 78643K 175 0 counters 50 34K 35K 78643K 56 0 ioctlops 0 0K 4K 78643K 1551 0 iov 0 0K 16K 78643K 25 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1335 83K 84K 78643K 1591 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 8 25K 85K 78643K 418 0 proc 69 91K 115K 78643K 526 0 subproc 78 4K 6K 78643K 108 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 43 0 in_multi 70 4K 6K 78643K 110 0 ether_multi 1 0K 0K 78643K 8 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 115 519K 519K 78643K 115 0 exec 0 0K 2K 78643K 696 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 261 137K 137K 78643K 4149 0 UVM aobj 9 2K 2K 78643K 9 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 11 0 NDP 9 0K 2K 78643K 28 0 temp 118 4732K 4797K 78643K 6140 0 kqueue 12 18K 24K 78643K 40 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 42 0 39 1 0 1 1 0 8 0 rtentry 112 119 0 40 4 0 4 4 0 8 0 unpcb 136 98 0 83 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 61 0 61 1 1 0 1 0 8 0 tcpcb 736 89 0 85 4 3 1 4 0 8 0 arp 120 20 0 8 1 0 1 1 0 8 0 inpcb 312 597 0 590 9 1 8 9 0 8 7 nd6 48 26 0 9 1 0 1 1 0 8 0 pkpcb 40 67 0 67 1 1 0 1 0 8 0 kcovpl 48 8 0 2 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 pfrktable 1344 7 0 2 1 0 1 1 0 8 0 pfstitem 24 40 0 13 1 0 1 1 0 8 0 pfstkey 112 40 0 13 1 0 1 1 0 8 0 pfstate 336 40 0 13 3 0 3 3 0 8 0 pfsrctr 152 2 0 0 1 0 1 1 0 8 0 pfrule 1360 64 0 54 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 478 0 154 30 3 27 30 0 8 1 art_table 32 479 0 154 4 0 4 4 0 8 0 art_node 16 118 0 46 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1948 0 512 91 0 91 91 0 8 0 ffsino 272 1948 0 512 97 0 97 97 0 8 0 nchpl 144 2618 0 934 63 0 63 63 0 8 0 uvmvnodes 80 2256 0 0 47 0 47 47 0 8 0 vnodes 224 2256 0 0 133 0 133 133 0 8 0 namei 1024 9026 0 9026 2 1 1 2 0 8 1 percpumem 16 40 0 3 1 0 1 1 0 8 0 vcpupl 2048 3 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 5 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 6 2 0 2 2 0 8 0 scxspl 216 7771 0 7771 9 8 1 8 0 8 1 plimitpl 152 61 0 44 1 0 1 1 0 8 0 sigapl 424 744 0 676 9 1 8 8 0 8 0 futexpl 64 2773 0 2773 1 0 1 1 0 8 1 knotepl 120 491 0 0 15 0 15 15 0 8 0 kqueuepl 216 156 0 148 5 0 5 5 0 8 4 pipepl 336 211 0 188 6 3 3 6 0 8 0 fdescpl 496 706 0 685 5 0 5 5 0 8 0 filepl 152 4057 0 3864 15 2 13 15 0 8 3 lockfpl 104 119 0 117 1 0 1 1 0 8 0 lockfspl 48 59 0 57 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 62 0 45 1 0 1 1 0 8 0 ucredpl 96 529 0 517 1 0 1 1 0 8 0 zombiepl 144 688 0 676 1 0 1 1 0 8 0 processpl 1064 744 0 676 5 0 5 5 0 8 0 procpl 672 1367 0 1282 9 1 8 8 0 8 0 srpgc 96 4 0 4 1 1 0 1 0 8 0 sockpl 480 804 0 779 18 7 11 16 0 8 7 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 171 0 0 21 0 21 21 0 8 0 mtagpl 96 45 0 0 2 0 2 2 0 8 0 mbufpl 256 268 0 0 17 0 17 17 0 8 0 bufpl 288 4640 0 141 322 0 322 322 0 8 0 anonpl 24 133238 0 102375 188 2 186 186 0 186 0 amapchunkpl 152 11207 0 9731 58 1 57 57 0 158 0 amappl16 200 1453 0 861 33 1 32 32 0 8 0 amappl15 192 107 0 103 1 0 1 1 0 8 0 amappl14 184 101 0 94 1 0 1 1 0 8 0 amappl13 176 121 0 117 1 0 1 1 0 8 0 amappl12 168 92 0 84 1 0 1 1 0 8 0 amappl11 160 87 0 66 1 0 1 1 0 8 0 amappl10 152 48 0 42 1 0 1 1 0 8 0 amappl9 144 537 0 530 1 0 1 1 0 8 0 amappl8 136 636 0 580 2 0 2 2 0 8 0 amappl7 128 164 0 152 1 0 1 1 0 8 0 amappl6 120 254 0 236 2 1 1 2 0 8 0 amappl5 112 293 0 275 1 0 1 1 0 8 0 amappl4 104 890 0 863 1 0 1 1 0 8 0 amappl3 96 1554 0 1494 2 0 2 2 0 8 0 amappl2 88 993 0 929 3 1 2 3 0 8 0 amappl1 80 18672 0 17976 20 5 15 20 0 8 0 amappl 88 3684 0 3502 5 0 5 5 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 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 709 0 677 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 709 0 677 1 0 1 1 0 8 0 vmmpekpl 168 10467 0 10419 3 0 3 3 0 8 0 vmmpepl 168 71407 0 68706 152 20 132 152 0 357 11 vmsppl 368 708 0 676 4 0 4 4 0 8 0 rwobjpl 56 20795 0 16860 56 0 56 56 0 8 0 pdppl 4096 1425 0 1355 112 40 72 79 0 8 2 pvpl 32 376068 0 338855 339 23 316 316 0 265 12 pmappl 248 708 0 676 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 734 0 54 20 0 20 20 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:437 panic(ffffffff8259ce62) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826140ee,ffffffff8259075c,4f6,ffffffff825c706b) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007812a20) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1270 uvm_fault_unwire_locked(fffffd8069a5fe78,569d4672000,569d4871000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1672 uvm_unmap_kill_entry_withlock(fffffd8069a5fe78,fffffd806aa7d540,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd8069a5fe78) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8069a5fe78) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd8069a5fe78) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133a48) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020cd8ff0) 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+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 __mp_lock(ffffffff82b45678) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b45678) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82b45678,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff80002e3fe240,1) at sleep_finish+0x198 sys/kern/kern_synch.c:437 rwsleep(ffff8000fffe2d30,ffffffff829cc500,120,ffffffff82599478,0) at rwsleep+0xd5 sys/kern/kern_synch.c:317 futex_wait(522ee0d67a0,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff8000fffe2d30,ffff80002e3fe3d0,ffff80002e3fe430) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002e3fe4a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3fe4a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x52345485750, count: 2 ddb{1}> trace x86_ipi_db(ffff800020cd8ff0) 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+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 __mp_lock(ffffffff82b45678) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b45678) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82b45678,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff80002e3fe240,1) at sleep_finish+0x198 sys/kern/kern_synch.c:437 rwsleep(ffff8000fffe2d30,ffffffff829cc500,120,ffffffff82599478,0) at rwsleep+0xd5 sys/kern/kern_synch.c:317 futex_wait(522ee0d67a0,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff8000fffe2d30,ffff80002e3fe3d0,ffff80002e3fe430) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002e3fe4a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3fe4a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x52345485750, count: -13