panic: mtx 0xffffffff839c8f28: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *441789 82105 32767 0x10 0 0 syz-executor 179203 82105 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e02f5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839c8f28) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839c8f28) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80086c2780) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80086c2780) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80086c2780) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8064dd2a68,0,ffff80003c4455e8,ffff80003c4455c4,0,2,9a293daa992e771a,ffff80003c445840) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c445808,ffff80003c445840,ffff80003c445670,ffff80003c445678) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c445808,ffff80003c445840,ffff80003c445780) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806be805d0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c445990,2000000003c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c445990) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e04870ca480, count: 2 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: mtx 0xffffffff839c8f28: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e02f5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839c8f28) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839c8f28) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80086c2780) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80086c2780) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80086c2780) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8064dd2a68,0,ffff80003c4455e8,ffff80003c4455c4,0,2,9a293daa992e771a,ffff80003c445840) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c445808,ffff80003c445840,ffff80003c445670,ffff80003c445678) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c445808,ffff80003c445840,ffff80003c445780) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806be805d0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c445990,2000000003c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c445990) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e04870ca480, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c445330 rbx 0xffffffff837f2dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003a4234a8 rax 0xffffffff837f1ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe7e05403ac2b678e r11 0x39447da2cfdaa54a r12 0xffffffff837f2bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff82b343d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c445320 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=441789 pid=82105 tcnt=4 stat=onproc flags process=10 proc=0 runpri=36, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a422f88,0xffff80003a4227e8 process=0xffff80003a426eb0 user=0xffff80003c440000, vmspace=0xfffffd806be805d0 estcpu=36, cpticks=3, pctcpu=0.0, user=3, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *82105 441789 97912 32767 7 0x10 syz-executor 82105 240805 97912 32767 3 0x4000090 fsleep syz-executor 82105 402573 97912 32767 3 0x4000010 biowait syz-executor 82105 179203 97912 32767 7 0x4000010 syz-executor 96993 501650 14248 32767 3 0x90 nanoslp syz-executor 96993 470024 14248 32767 3 0x4000090 ttyretype syz-executor 96993 122911 14248 32767 3 0x4000090 fsleep syz-executor 49110 316499 44183 32767 3 0x90 nanoslp syz-executor 49110 376917 44183 32767 3 0x4000090 msgwait syz-executor 49110 335387 44183 32767 3 0x4000090 fsleep syz-executor 91381 470716 35717 32767 3 0x90 nanoslp syz-executor 91381 7519 35717 32767 3 0x4000090 fifor syz-executor 91381 433767 35717 32767 3 0x4000090 fsleep syz-executor 1487 166312 0 0 3 0x14200 bored sosplice 69878 398238 11757 32767 3 0x90 nanoslp syz-executor 35717 80778 61369 32767 3 0x90 nanoslp syz-executor 97542 69894 5165 32767 3 0x90 nanoslp syz-executor 14248 121080 4611 32767 3 0x90 nanoslp syz-executor 96052 38978 3483 32767 3 0x90 nanoslp syz-executor 58924 72899 17012 32767 3 0x90 wait syz-executor 44183 196248 70014 32767 3 0x90 nanoslp syz-executor 97912 462232 7763 32767 3 0x90 nanoslp syz-executor 61369 204905 42799 0 3 0x82 wait syz-executor 11757 159078 42799 0 3 0x82 wait syz-executor 4611 16484 42799 0 3 0x82 wait syz-executor 5165 340571 42799 0 3 0x82 wait syz-executor 17012 305072 42799 0 3 0x82 wait syz-executor 3483 411223 42799 0 3 0x82 wait syz-executor 70014 429389 42799 0 3 0x82 wait syz-executor 7763 224840 42799 0 3 0x82 wait syz-executor 42799 157139 26873 0 3 0x82 kqread syz-executor 26873 281059 53122 0 3 0x10008a sigsusp ksh 53122 479111 19310 0 3 0x98 kqread sshd-session 19310 207347 74206 0 3 0x92 kqread sshd-session 52449 127483 1 0 3 0x100083 ttyin getty 74206 112406 1 0 3 0x88 kqread sshd 71821 294014 46651 73 3 0x1100090 kqread syslogd 46651 196846 1 0 3 0x100082 sbwait syslogd 49207 47263 1 0 3 0x100080 kqread resolvd 59166 110094 84044 77 3 0x100092 kqread dhcpleased 60409 469015 84044 77 3 0x100092 kqread dhcpleased 84044 105251 1 0 3 0x80 kqread dhcpleased 66030 388182 0 0 3 0x14200 bored smr 85579 405063 0 0 3 0x14200 pgzero zerothread 84023 399555 0 0 3 0x14200 aiodoned aiodoned 87237 370969 0 0 3 0x14200 syncer update 20180 289330 0 0 3 0x14200 cleaner cleaner 93221 289274 0 0 3 0x14200 reaper reaper 11976 71192 0 0 3 0x14200 pgdaemon pagedaemon 59484 395848 0 0 3 0x14200 bored viomb 90563 499594 0 0 3 0x40014200 acpi0 acpi0 31471 385602 0 0 3 0x40014200 idle1 23397 197994 0 0 3 0x14200 bored softnet3 84373 453197 0 0 3 0x14200 bored softnet2 67654 213166 0 0 3 0x14200 bored softnet1 77608 101722 0 0 3 0x14200 bored softnet0 9562 205970 0 0 3 0x14200 bored systqmp 15989 177829 0 0 3 0x14200 bored systq 83384 366296 0 0 3 0x14200 tmoslp softclockmp 45056 516919 0 0 3 0x40014200 tmoslp softclock 59327 10237 0 0 3 0x40014200 idle0 1 293955 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 (0xffffffff839c8f38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 82105 (syz-executor) thread 0xffff80003a4234a8 (441789) exclusive rwlock uobjlk r = 0 (0xfffffd806bada3c8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvn_io+0x667 sys/uvm/uvm_vnode.c:1297 #3 uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 #4 uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff839c8f38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 82105 (syz-executor) thread 0xffff80003a4227d8 (240805) exclusive rwlock futexpl r = 0 (0xffffffff8396a898) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 pool_get+0x10b sys/kern/subr_pool.c:583 #3 futex_get+0x309 sys/kern/sys_futex.c:171 #4 futex_wait+0x328 sys/kern/sys_futex.c:-1 #5 sys_futex+0x149 sys/kern/sys_futex.c:101 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock futex r = 0 (0xffffffff83860c58) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sys_futex+0x69 sys/kern/sys_futex.c:98 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 82105 (syz-executor) thread 0xffff80003a422cf8 (402573) exclusive rrwlock inode r = 0 (0xfffffd806c08d0e0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c4 sys/kern/vfs_syscalls.c:2920 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10185 10954K 10965K 166960K 11262 0 pcb 17 12K 12K 166960K 17 0 rtable 242 6K 7K 166960K 362 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 4 1K 1K 166960K 4 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 16K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1431 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 20 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 318 0 sigio 0 0K 0K 166960K 2 0 proc 59 91K 115K 166960K 494 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 101 0 in_multi 99 7K 7K 166960K 110 0 ether_multi 1 0K 0K 166960K 1 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 372 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 273 166K 186K 166960K 4500 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 47 94K 112K 166960K 1358 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 23 0 NDP 11 0K 2K 166960K 27 0 temp 41 8679K 8743K 166960K 4545 0 kqueue 14 22K 26K 166960K 63 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 53 0 50 1 0 1 1 0 8 0 rtentry 176 115 0 1 6 0 6 6 0 8 0 unpcb 144 176 0 155 2 0 2 2 0 8 1 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 808 106 0 97 5 0 5 5 0 8 3 arp 128 19 0 0 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 1 1 0 1 1 0 8 0 inpcb 384 261 0 248 5 0 5 5 0 8 3 nd6 144 27 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 256 468 0 0 30 0 30 30 0 8 0 art_table 32 469 0 0 4 0 4 4 0 8 0 art_node 16 114 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1870 0 364 95 0 95 95 0 8 0 ffsino 288 1870 0 364 108 0 108 108 0 8 0 nchpl 144 2327 0 645 63 0 63 63 0 8 0 uvmvnodes 80 1951 0 0 40 0 40 40 0 8 0 vnodes 216 1951 0 0 109 0 109 109 0 8 0 namei 1024 7199 0 7199 1 0 1 1 0 8 1 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 7476 0 7475 3 1 2 2 1 8 1 plimitpl 152 57 0 30 2 0 2 2 0 8 0 sigapl 424 602 0 545 8 0 8 8 0 8 1 futexpl 64 2746 0 2742 1 0 1 1 0 8 0 knotepl 120 265 0 0 9 0 9 9 0 8 0 kqueuepl 224 88 0 78 2 0 2 2 0 8 1 pipepl 336 117 0 88 3 0 3 3 0 8 0 fdescpl 520 583 0 545 3 0 3 3 0 8 0 filepl 160 2749 0 2456 13 0 13 13 0 8 0 lockfpl 104 112 0 44 2 0 2 2 0 8 0 lockfspl 48 22 0 18 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 33 0 9 1 0 1 1 0 8 0 ucredpl 104 501 0 482 1 0 1 1 0 8 0 zombiepl 144 549 0 545 1 0 1 1 0 8 0 processpl 1192 602 0 545 5 0 5 5 0 8 0 procpl 656 901 0 835 7 0 7 7 0 8 0 sockpl 728 524 0 488 7 0 7 7 0 8 3 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1183 0 0 74 0 74 74 0 8 0 bufpl 280 2686 0 116 184 0 184 184 0 8 0 anonpl 24 125807 0 120305 46 0 46 46 0 184 9 amapchunkpl 152 14234 0 13501 35 0 35 35 0 158 4 amappl16 200 2381 0 2355 5 2 3 5 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 108 0 98 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1197 0 1159 2 0 2 2 0 8 0 amappl11 160 50 0 40 1 0 1 1 0 8 0 amappl10 152 45 0 45 1 1 0 1 0 8 0 amappl9 144 244 0 243 1 0 1 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 114 0 104 1 0 1 1 0 8 0 amappl6 120 176 0 173 1 0 1 1 0 8 0 amappl5 112 133 0 127 1 0 1 1 0 8 0 amappl4 104 304 0 288 1 0 1 1 0 8 0 amappl3 96 2388 0 2249 4 0 4 4 0 8 0 amappl2 88 626 0 572 2 0 2 2 0 8 0 amappl1 80 9246 0 8660 16 0 16 16 0 8 1 amappl 88 3802 0 3596 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 583 0 545 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 583 0 545 1 0 1 1 0 8 0 vmmpekpl 168 6399 0 6357 3 0 3 3 0 8 0 vmmpepl 168 44023 0 41827 108 0 108 108 0 357 2 vmsppl 480 582 0 545 7 1 6 6 0 8 0 rwobjpl 72 16867 0 14032 52 0 52 52 0 8 0 pdppl 4096 1174 0 1090 114 26 88 96 0 8 4 pvpl 32 17227 0 0 139 0 139 139 0 265 0 pmappl 256 582 0 545 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 462 0 29 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e02f5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839c8f28) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839c8f28) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80086c2780) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80086c2780) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80086c2780) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8064dd2a68,0,ffff80003c4455e8,ffff80003c4455c4,0,2,9a293daa992e771a,ffff80003c445840) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c445808,ffff80003c445840,ffff80003c445670,ffff80003c445678) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c445808,ffff80003c445840,ffff80003c445780) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806be805d0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c445990,2000000003c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c445990) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e04870ca480, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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(ffffffff83947f88) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83947f88) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c469980) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c469980) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x15c2b721db0, count: 9 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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(ffffffff83947f88) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83947f88) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c469980) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c469980) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x15c2b721db0, count: -6