panic: mtx 0xffffffff83a087b0: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *404864 19741 32767 0x10 0 1 syz-executor 192209 91586 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e3834) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a087b0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a087b0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80086badf0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80086badf0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80086badf0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b8d8680,0,ffff80003c4485a8,ffff80003c44858c,0,2,eacd1a812f6874ad,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4487c0,ffff80003c4487f8,ffff80003c448640,ffff80003c448628) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c4487c0,ffff80003c4487f8,ffff80003c448740) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c0af210,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c448950,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c448950) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x747be3db0550, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: mtx 0xffffffff83a087b0: locking against myself ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e3834) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a087b0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a087b0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80086badf0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80086badf0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80086badf0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b8d8680,0,ffff80003c4485a8,ffff80003c44858c,0,2,eacd1a812f6874ad,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4487c0,ffff80003c4487f8,ffff80003c448640,ffff80003c448628) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c4487c0,ffff80003c4487f8,ffff80003c448740) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c0af210,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c448950,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c448950) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x747be3db0550, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4482f0 rbx 0xffff8000299eedcf rdx 0 rcx 0xffff8000ffff0aa0 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xcd9319ae3f85a94d r11 0xb8b43f5536403625 r12 0xffff8000299eebd0 r13 0 r14 0 r15 0x1 rip 0xffffffff82e36d55 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4482e0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=404864 pid=19741 tcnt=4 stat=onproc flags process=10 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff1a90,0xffff8000ffff02b8 process=0xffff8000fffeefa0 user=0xffff80003c443000, vmspace=0xfffffd806c0af210 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *19741 404864 42817 32767 7 0x10 syz-executor 19741 130562 42817 32767 3 0x4000090 fsleep syz-executor 19741 498731 42817 32767 3 0x4000010 biowait syz-executor 19741 20857 42817 32767 3 0x4000090 fsleep syz-executor 58740 496716 94002 32767 2 0x10 syz-executor 58740 339315 94002 32767 3 0x4000090 piperd syz-executor 53552 322673 90084 32767 3 0x3010 suspend syz-executor 53552 24940 90084 32767 2 0x4081010 syz-executor 15283 439854 11887 32767 3 0x90 nanoslp syz-executor 15283 472051 11887 32767 3 0x4000090 sbwait syz-executor 15283 312864 11887 32767 3 0x4000090 fsleep syz-executor 93757 177588 59193 32767 2 0x10 syz-executor 93757 457568 59193 32767 3 0x4000090 fifow syz-executor 93757 449997 59193 32767 3 0x4000090 fsleep syz-executor 54929 471265 29241 32767 3 0x90 nanoslp syz-executor 54929 482345 29241 32767 3 0x4000090 kqsel syz-executor 41967 203886 47300 0 3 0x82 sbwait sshd-session 82893 243096 0 0 3 0x14200 bored sosplice 29400 507286 25850 0 3 0x100082 sbwait arp 25850 495357 1041 0 3 0x10008a sigsusp sh 29241 194735 94764 32767 3 0x90 nanoslp syz-executor 94002 73005 8427 32767 3 0x90 nanoslp syz-executor 1041 13838 85736 0 3 0x80 wait syz-executor 11887 364140 70477 32767 3 0x90 nanoslp syz-executor 90084 332095 13630 32767 3 0x90 nanoslp syz-executor 42817 236312 94344 32767 3 0x90 nanoslp syz-executor 46775 153567 12251 32767 2 0x10 syz-executor 59193 180112 86083 32767 3 0x90 nanoslp syz-executor 94344 100473 91586 0 3 0x82 wait syz-executor 8427 229555 91586 0 3 0x82 wait syz-executor 12251 372419 91586 0 3 0x82 wait syz-executor 85736 72432 91586 0 3 0x82 wait syz-executor 86083 296321 91586 0 3 0x82 wait syz-executor 13630 274338 91586 0 3 0x82 wait syz-executor 70477 124049 91586 0 3 0x82 wait syz-executor 94764 250296 91586 0 3 0x82 wait syz-executor 91586 192209 78257 0 7 0x2 syz-executor 78257 97057 15737 0 3 0x10008a sigsusp ksh 15737 237502 64136 0 3 0x98 kqread sshd-session 64136 248222 47300 0 3 0x92 kqread sshd-session 60266 94774 1 0 3 0x100083 ttyin getty 47300 171843 1 0 3 0x88 kqread sshd 85211 383954 22136 73 3 0x1100090 kqread syslogd 22136 202119 1 0 3 0x100082 sbwait syslogd 61181 465649 1 0 3 0x100080 kqread resolvd 69709 220954 18336 77 3 0x100092 kqread dhcpleased 82261 73431 18336 77 3 0x100092 kqread dhcpleased 18336 309961 1 0 3 0x80 kqread dhcpleased 19928 350253 0 0 3 0x14200 bored smr 95906 371891 0 0 2 0x14200 zerothread 6971 20458 0 0 3 0x14200 aiodoned aiodoned 64784 171384 0 0 3 0x14200 syncer update 60410 281079 0 0 3 0x14200 cleaner cleaner 52267 293048 0 0 3 0x14200 reaper reaper 69380 236157 0 0 3 0x14200 pgdaemon pagedaemon 8718 232390 0 0 3 0x14200 bored viomb 97752 313889 0 0 3 0x40014200 acpi0 acpi0 69687 236843 0 0 3 0x40014200 idle1 24460 4738 0 0 3 0x14200 bored softnet3 99761 467740 0 0 3 0x14200 bored softnet2 8882 144559 0 0 3 0x14200 bored softnet1 346 5335 0 0 3 0x14200 bored softnet0 24659 490736 0 0 3 0x14200 bored systqmp 64953 81234 0 0 3 0x14200 bored systq 68537 464376 0 0 3 0x14200 tmoslp softclockmp 46762 368159 0 0 3 0x40014200 tmoslp softclock 76221 87249 0 0 3 0x40014200 idle0 1 151350 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83a087c0) #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+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 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 19741 (syz-executor) thread 0xffff8000ffff0aa0 (404864) exclusive rwlock uobjlk r = 0 (0xfffffd806519bd18) #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+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 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 (0xffffffff83a087c0) #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+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 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 19741 (syz-executor) thread 0xffff8000ffff02a8 (130562) exclusive rwlock futexpl r = 0 (0xffffffff8394ec28) #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 (0xffffffff83847c78) #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 19741 (syz-executor) thread 0xffff8000ffff1d38 (498731) exclusive rrwlock inode r = 0 (0xfffffd806bba68c0) #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:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c4 sys/kern/vfs_syscalls.c:2912 #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10186 10954K 10965K 166960K 11263 0 pcb 17 12K 12K 166960K 17 0 rtable 220 6K 6K 166960K 330 0 pf 31 16K 16K 166960K 31 0 ifaddr 40 7K 7K 166960K 42 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 31 0 iov 0 0K 16K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1353 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 16 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 125K 166960K 233 0 sigio 0 0K 0K 166960K 2 0 proc 63 91K 115K 166960K 480 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 2 0K 0K 166960K 36 0 in_multi 90 6K 6K 166960K 100 0 ether_multi 1 0K 0K 166960K 4 0 mrt 2 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 341 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 265 163K 173K 166960K 3565 0 UVM aobj 5 3K 3K 166960K 5 0 pinsyscall 50 100K 114K 166960K 1224 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 8 0 NDP 11 0K 1K 166960K 25 0 temp 41 8679K 8743K 166960K 4076 0 kqueue 14 22K 26K 166960K 40 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 47 0 43 1 0 1 1 0 8 0 rtentry 176 104 0 1 5 0 5 5 0 8 0 unpcb 144 122 0 101 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 808 39 0 33 1 0 1 1 0 8 0 arp 128 17 0 0 1 0 1 1 0 8 0 inpcb 384 179 0 163 5 0 5 5 0 8 3 nd6 144 22 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 256 427 0 0 27 0 27 27 0 8 0 art_table 32 428 0 0 4 0 4 4 0 8 0 art_node 16 103 0 9 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1673 0 169 95 0 95 95 0 8 0 ffsino 288 1673 0 169 108 0 108 108 0 8 0 nchpl 144 1997 0 320 63 0 63 63 0 8 0 uvmvnodes 80 1754 0 0 36 0 36 36 0 8 0 vnodes 216 1754 0 0 98 0 98 98 0 8 0 namei 1024 5940 0 5940 1 0 1 1 0 8 1 percpumem 16 47 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 6494 0 6492 3 2 1 2 1 8 0 plimitpl 152 53 0 27 2 0 2 2 0 8 1 sigapl 424 506 0 448 8 0 8 8 0 8 0 futexpl 64 1463 0 1459 1 0 1 1 0 8 0 knotepl 120 104 0 0 4 0 4 4 0 8 0 kqueuepl 224 50 0 38 1 0 1 1 0 8 0 pipepl 336 112 0 83 3 0 3 3 0 8 0 fdescpl 520 487 0 448 4 0 4 4 0 8 0 filepl 160 1873 0 1641 12 0 12 12 0 8 1 lockfpl 104 34 0 31 1 0 1 1 0 8 0 lockfspl 48 14 0 11 1 0 1 1 0 8 0 sessionpl 144 22 0 5 1 0 1 1 0 8 0 pgrppl 48 31 0 5 1 0 1 1 0 8 0 ucredpl 104 210 0 192 1 0 1 1 0 8 0 zombiepl 144 449 0 448 1 0 1 1 0 8 0 processpl 1216 506 0 448 5 0 5 5 0 8 0 procpl 680 679 0 611 7 0 7 7 0 8 0 sockpl 728 351 0 309 7 0 7 7 0 8 2 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 263 0 0 17 0 17 17 0 8 0 bufpl 280 2466 0 112 169 0 169 169 0 8 0 anonpl 32 7190 0 0 58 0 58 58 0 246 0 amapchunkpl 152 10883 0 10330 32 0 32 32 0 158 9 amappl16 200 2078 0 2057 5 2 3 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 101 0 89 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1078 0 1039 2 0 2 2 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 24 0 23 1 0 1 1 0 8 0 amappl7 128 93 0 81 1 0 1 1 0 8 0 amappl6 120 168 0 162 1 0 1 1 0 8 0 amappl5 112 110 0 103 1 0 1 1 0 8 0 amappl4 104 283 0 264 1 0 1 1 0 8 0 amappl3 96 1778 0 1648 4 0 4 4 0 8 0 amappl2 88 589 0 526 2 0 2 2 0 8 0 amappl1 80 8246 0 7564 15 0 15 15 0 8 0 amappl 88 2934 0 2745 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 487 0 448 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 487 0 448 1 0 1 1 0 8 0 vmmpekpl 168 5465 0 5432 2 0 2 2 0 8 0 vmmpepl 168 36927 0 34648 103 0 103 103 0 357 1 vmsppl 480 486 0 448 7 1 6 6 0 8 0 rwobjpl 72 14700 0 11957 51 0 51 51 0 8 0 pdppl 4096 981 0 896 107 20 87 97 0 8 2 pvpl 32 15997 0 0 130 0 130 130 0 265 0 pmappl 256 486 0 448 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 400 0 23 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83890ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83925fd8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83925fd8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff80002a2cb8c0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_const_cmp4(ffff80002a2cb9c8,ffff80002a2cb9c8) at __sanitizer_cov_trace_const_cmp4+0x3f sys/dev/kcov.c:231 kqueue_sleep(fffffd806ecf0540,ffff80002a2cbe78) at kqueue_sleep+0x8e TIMESPEC_TO_NSEC sys/sys/time.h:-1 [inline] kqueue_sleep(fffffd806ecf0540,ffff80002a2cbe78) at kqueue_sleep+0x8e sys/kern/kern_event.c:1451 kqueue_scan(ffff80002a2cbc40,8,ffff80002a2cbb40,ffff80002a2cbe78,ffff80002a247d50,ffff80002a2cbdec) at kqueue_scan+0x21e sys/kern/kern_event.c:1509 dopselect(ffff80002a247d50,32,70db26733d70,0,0,ffff80002a2cbe78,37ef9f6787377e6b,ffff80002a247d50) at dopselect+0x5eb sys/kern/sys_generic.c:691 sys_pselect(ffff80002a247d50,ffff80002a2cbfc0,ffff80002a2cbf10) at sys_pselect+0x263 sys/kern/sys_generic.c:589 syscall(ffff80002a2cbfc0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2cbfc0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70db26733d20, count: 1 ddb{0}> trace x86_ipi_db(ffffffff83890ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83925fd8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83925fd8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff80002a2cb8c0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_const_cmp4(ffff80002a2cb9c8,ffff80002a2cb9c8) at __sanitizer_cov_trace_const_cmp4+0x3f sys/dev/kcov.c:231 kqueue_sleep(fffffd806ecf0540,ffff80002a2cbe78) at kqueue_sleep+0x8e TIMESPEC_TO_NSEC sys/sys/time.h:-1 [inline] kqueue_sleep(fffffd806ecf0540,ffff80002a2cbe78) at kqueue_sleep+0x8e sys/kern/kern_event.c:1451 kqueue_scan(ffff80002a2cbc40,8,ffff80002a2cbb40,ffff80002a2cbe78,ffff80002a247d50,ffff80002a2cbdec) at kqueue_scan+0x21e sys/kern/kern_event.c:1509 dopselect(ffff80002a247d50,32,70db26733d70,0,0,ffff80002a2cbe78,37ef9f6787377e6b,ffff80002a247d50) at dopselect+0x5eb sys/kern/sys_generic.c:691 sys_pselect(ffff80002a247d50,ffff80002a2cbfc0,ffff80002a2cbf10) at sys_pselect+0x263 sys/kern/sys_generic.c:589 syscall(ffff80002a2cbfc0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2cbfc0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70db26733d20, count: -14 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e3834) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a087b0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a087b0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80086badf0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80086badf0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80086badf0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b8d8680,0,ffff80003c4485a8,ffff80003c44858c,0,2,eacd1a812f6874ad,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4487c0,ffff80003c4487f8,ffff80003c448640,ffff80003c448628) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c4487c0,ffff80003c4487f8,ffff80003c448740) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c0af210,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c448950,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c448950) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x747be3db0550, count: 2 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e3834) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a087b0) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a087b0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80086badf0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80086badf0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80086badf0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b8d8680,0,ffff80003c4485a8,ffff80003c44858c,0,2,eacd1a812f6874ad,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4487c0,ffff80003c4487f8,ffff80003c448640,ffff80003c448628) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c4487c0,ffff80003c4487f8,ffff80003c448740) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c0af210,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c448950,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c448950) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x747be3db0550, count: -13