uvm_fault(0xffffffff83ad71f0, 0xffff800029ed5000, 0, 1) -> e kernel: page fault trap, code=0 Stopped at pvclock_get+0x53: movl 0(%r15),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND *176015 73140 0 0 0x4000000 0 syz-executor pvclock_get(ffffffff83937fb0) at pvclock_get+0x53 pvclock_read_begin sys/dev/pv/pvclock.c:278 [inline] pvclock_get(ffffffff83937fb0) at pvclock_get+0x53 sys/dev/pv/pvclock.c:333 nsecuptime() at nsecuptime+0x62 tc_delta sys/kern/kern_tc.c:138 [inline] nsecuptime() at nsecuptime+0x62 binuptime sys/kern/kern_tc.c:191 [inline] nsecuptime() at nsecuptime+0x62 sys/kern/kern_tc.c:257 clockintr_dispatch(ffff80002a778df0) at clockintr_dispatch+0xe8 sys/kern/kern_clockintr.c:180 lapic_clockintr(0,0) at lapic_clockintr+0x43 sys/arch/amd64/amd64/lapic.c:482 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a __sanitizer_cov_trace_const_cmp4(ffffffff836d59b0,fffff7807170fa60) at __sanitizer_cov_trace_const_cmp4+0x16 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(ffffffff836d59b0,fffff7807170fa60) at __sanitizer_cov_trace_const_cmp4+0x16 sys/dev/kcov.c:230 uvm_pagelookup(fffff7807170fa50,355000) at uvm_pagelookup+0x51 uvm_objtree_RBT_FIND sys/uvm/uvm_object.h:93 [inline] uvm_pagelookup(fffff7807170fa50,355000) at uvm_pagelookup+0x51 sys/uvm/uvm_page.c:1171 buf_free_pages(fffff7807170f998) at buf_free_pages+0xec sys/kern/vfs_biomem.c:-1 buf_dealloc_mem(fffff7807170f998) at buf_dealloc_mem+0x14e sys/kern/vfs_biomem.c:179 buf_put(fffff7807170f998) at buf_put+0x1d9 sys/kern/vfs_bio.c:119 brelse(fffff7807170f998) at brelse+0x395 sys/kern/vfs_bio.c:801 writedisklabel(d02,ffffffff81561a10,ffff800000039000) at writedisklabel+0x1b5 sys/arch/amd64/amd64/disksubr.c:158 sdioctl(d01,84946467,ffff800001585800,3,ffff8000380bbca8) at sdioctl+0x959 sys/scsi/sd.c:919 VOP_IOCTL(fffff780674d4050,84946467,ffff800001585800,3,fffff78007ffd8f0,ffff8000380bbca8) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 end trace frame: 0xffff80002a7793a0, count: 0 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff83ad71f0, 0xffff800029ed5000, 0, 1) -> e ddb> trace pvclock_get(ffffffff83937fb0) at pvclock_get+0x53 pvclock_read_begin sys/dev/pv/pvclock.c:278 [inline] pvclock_get(ffffffff83937fb0) at pvclock_get+0x53 sys/dev/pv/pvclock.c:333 nsecuptime() at nsecuptime+0x62 tc_delta sys/kern/kern_tc.c:138 [inline] nsecuptime() at nsecuptime+0x62 binuptime sys/kern/kern_tc.c:191 [inline] nsecuptime() at nsecuptime+0x62 sys/kern/kern_tc.c:257 clockintr_dispatch(ffff80002a778df0) at clockintr_dispatch+0xe8 sys/kern/kern_clockintr.c:180 lapic_clockintr(0,0) at lapic_clockintr+0x43 sys/arch/amd64/amd64/lapic.c:482 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a __sanitizer_cov_trace_const_cmp4(ffffffff836d59b0,fffff7807170fa60) at __sanitizer_cov_trace_const_cmp4+0x16 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(ffffffff836d59b0,fffff7807170fa60) at __sanitizer_cov_trace_const_cmp4+0x16 sys/dev/kcov.c:230 uvm_pagelookup(fffff7807170fa50,355000) at uvm_pagelookup+0x51 uvm_objtree_RBT_FIND sys/uvm/uvm_object.h:93 [inline] uvm_pagelookup(fffff7807170fa50,355000) at uvm_pagelookup+0x51 sys/uvm/uvm_page.c:1171 buf_free_pages(fffff7807170f998) at buf_free_pages+0xec sys/kern/vfs_biomem.c:-1 buf_dealloc_mem(fffff7807170f998) at buf_dealloc_mem+0x14e sys/kern/vfs_biomem.c:179 buf_put(fffff7807170f998) at buf_put+0x1d9 sys/kern/vfs_bio.c:119 brelse(fffff7807170f998) at brelse+0x395 sys/kern/vfs_bio.c:801 writedisklabel(d02,ffffffff81561a10,ffff800000039000) at writedisklabel+0x1b5 sys/arch/amd64/amd64/disksubr.c:158 sdioctl(d01,84946467,ffff800001585800,3,ffff8000380bbca8) at sdioctl+0x959 sys/scsi/sd.c:919 VOP_IOCTL(fffff780674d4050,84946467,ffff800001585800,3,fffff78007ffd8f0,ffff8000380bbca8) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffff7806f2397f8,84946467,ffff800001585800,ffff8000380bbca8) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff8000380bbca8,ffff80002a779580,ffff80002a7794d0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002a779580) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a779580) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d45ff377f0, count: -18 ddb> show registers rdi 0xffffffff rsi 0xd rbp 0xffff80002a778ce0 rbx 0x3 rdx 0 rcx 0 rax 0xc r8 0 r9 0 r10 0 r11 0x761db1e6fb8c4bb9 r12 0x163e __ALIGN_SIZE+0x63e r13 0xffffffff83921578 th1 r14 0xffffffff83937fb0 pvclock_timecounter r15 0xffff800029ed5000 rip 0xffffffff828ca5c3 pvclock_get+0x53 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a778c90 ss 0x10 pvclock_get+0x53: movl 0(%r15),%r12d ddb> show proc PROC (syz-executor) tid=176015 pid=73140 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000380ba020,0xffff8000380baa90 process=0xffff80003c955220 user=0xffff80002a774000, vmspace=0xfffff7804cc9bb98 estcpu=31, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 77462 229119 33858 0 2 0 syz-executor 77462 25566 33858 0 2 0x4000000 syz-executor 5229 262667 10463 0 2 0x100002 sh 26112 265173 40472 0 2 0 syz-executor 26112 504008 40472 0 3 0x4000080 fsleep syz-executor 98707 237367 13638 0 2 0 syz-executor 98707 91118 13638 0 3 0x4000080 fsleep syz-executor 73380 436617 51311 0 2 0 syz-executor 73380 160231 51311 0 3 0x4000080 fsleep syz-executor 73140 215628 40140 0 2 0 syz-executor *73140 176015 40140 0 7 0x4000000 syz-executor 70580 351235 69933 0 2 0 syz-executor 70580 346173 69933 0 3 0x4000080 fsleep syz-executor 10463 331653 26236 0 3 0x82 wait syz-executor 85216 438504 1 0 3 0x100083 ttyin getty 17613 422582 0 0 3 0x14280 nfsidl nfsio 88752 243929 0 0 3 0x14280 nfsidl nfsio 66595 515490 0 0 3 0x14280 nfsidl nfsio 29368 485118 0 0 3 0x14280 nfsidl nfsio 11667 420026 0 0 3 0x14280 nfsidl nfsio 35909 415200 0 0 3 0x14280 nfsidl nfsio 48496 290497 0 0 3 0x14280 nfsidl nfsio 1501 71537 0 0 3 0x14280 nfsidl nfsio 27636 257171 0 0 3 0x14280 nfsidl nfsio 22913 262653 0 0 3 0x14280 nfsidl nfsio 22090 22664 0 0 3 0x14280 nfsidl nfsio 99581 453136 0 0 3 0x14280 nfsidl nfsio 72952 522929 0 0 3 0x14280 nfsidl nfsio 20571 31651 0 0 3 0x14280 nfsidl nfsio 55687 464210 0 0 3 0x14280 nfsidl nfsio 24967 364056 0 0 3 0x14280 nfsidl nfsio 60804 443781 0 0 3 0x14280 nfsidl nfsio 8855 313622 0 0 3 0x14280 nfsidl nfsio 95792 398578 0 0 3 0x14280 nfsidl nfsio 20528 426555 0 0 3 0x14280 nfsidl nfsio 33858 260645 26236 0 3 0x82 nanoslp syz-executor 40472 149524 26236 0 3 0x82 nanoslp syz-executor 13638 118713 26236 0 3 0x82 nanoslp syz-executor 51311 412103 26236 0 3 0x82 nanoslp syz-executor 90436 487370 26236 0 2 0x2 syz-executor 40140 375006 26236 0 3 0x82 nanoslp syz-executor 69933 425914 26236 0 3 0x82 nanoslp syz-executor 26236 419114 1 0 2 0x2 syz-executor 19789 173461 69025 0 3 0x98 kqread sshd-session 69025 356370 1 0 3 0x92 kqread sshd-session 88996 10204 1 73 3 0x1100090 kqread syslogd 72493 301953 0 0 3 0x14200 bored smr 17916 391126 0 0 2 0x14200 zerothread 62870 253643 0 0 3 0x14200 aiodoned aiodoned 38539 85818 0 0 3 0x14200 syncer update 79201 35490 0 0 3 0x14200 cleaner cleaner 68370 390131 0 0 3 0x14200 reaper reaper 65257 277369 0 0 3 0x14200 pgdaemon pagedaemon 5093 157793 0 0 3 0x14200 bored viomb 20265 315806 0 0 3 0x40014200 acpi0 acpi0 37027 124483 0 0 3 0x14200 bored softnet0 28915 252518 0 0 3 0x14200 bored systqmp 32327 410129 0 0 3 0x14200 bored systq 85156 28994 0 0 3 0x40014200 tmoslp softclock 94129 245112 0 0 3 0x40014200 idle0 1 45677 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11026 12164K 12430K 166960K 12739 0 pcb 17 13K 14K 166960K 179 0 rtable 210 7K 8K 166960K 822 0 pf 29 12K 20K 166960K 222 0 ifaddr 38 7K 7K 166960K 113 0 ifgroup 43 1K 2K 166960K 124 0 sysctl 4 1K 9K 166960K 42 0 counters 32 17K 18K 166960K 56 0 ioctlops 1 2K 4K 166960K 129 0 iov 0 0K 16K 166960K 21 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1383 87K 87K 166960K 1916 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 146 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 85K 166960K 706 0 sigio 0 0K 0K 166960K 4 0 proc 20 25K 91K 166960K 902 0 subproc 72 4K 4K 166960K 198 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 66 0 in_multi 87 6K 7K 166960K 266 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 21 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 605 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 143 92K 167K 166960K 7251 0 UVM aobj 14 2K 2K 166960K 15 0 pinsyscall 25 50K 90K 166960K 2160 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 16 0 NDP 10 0K 1K 166960K 75 0 temp 50 9110K 9174K 166960K 21702 0 kqueue 5 8K 28K 166960K 115 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 88 0 88 1 0 1 1 0 8 1 rtentry 136 276 0 187 4 0 4 4 0 8 0 unpcb 144 514 0 505 6 0 6 6 0 8 5 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 17 0 17 1 0 1 1 0 8 1 tcpcb 736 223 0 220 7 0 7 7 0 8 6 arp 96 46 0 30 1 0 1 1 0 8 0 ipq 40 4 0 4 1 0 1 1 0 8 1 ipqe 40 16 0 16 1 0 1 1 0 8 1 inpcb 328 646 0 641 7 0 7 7 0 8 6 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 3 0 3 1 0 1 1 0 8 1 nd6 112 70 0 49 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 22 0 14 1 0 1 1 0 8 0 ppxss 1072 8 0 8 1 0 1 1 0 8 1 pppxif 1416 2 0 2 1 0 1 1 0 8 1 pfstscr 40 7 0 5 1 0 1 1 0 8 0 pfanchor 1288 5 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 1 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 5 1 0 1 1 0 8 0 pfstate 384 4 0 3 1 0 1 1 0 8 0 pfrule 1360 2 0 2 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1161 0 767 31 0 31 31 0 8 3 art_table 40 1162 0 767 6 0 6 6 0 8 1 art_node 32 275 0 194 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semapl 72 143 0 133 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2300 0 813 94 0 94 94 0 8 0 ffsino 256 2300 0 813 94 0 94 94 0 8 0 nchpl 144 3021 0 1288 65 0 65 65 0 8 0 vnodes 216 2768 0 0 154 0 154 154 0 8 0 namei 1024 10948 0 10947 3 0 3 3 0 8 2 kstatmem 264 65 0 44 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 14263 0 14263 8 0 8 8 1 8 8 plimitpl 152 150 0 137 1 0 1 1 0 8 0 sigapl 424 996 0 941 8 0 8 8 0 8 1 knotepl 120 14982 0 14955 9 0 9 9 0 8 7 kqueuepl 184 135 0 131 1 0 1 1 0 8 0 pipepl 304 225 0 198 5 0 5 5 0 8 2 fdescpl 448 963 0 941 4 0 4 4 0 8 1 filepl 120 4978 0 4728 13 0 13 13 0 8 5 lockfpl 104 220 0 219 1 0 1 1 0 8 0 lockfspl 48 105 0 104 1 0 1 1 0 8 0 sessionpl 144 58 0 53 1 0 1 1 0 8 0 pgrppl 48 85 0 72 1 0 1 1 0 8 0 ucredpl 104 751 0 743 1 0 1 1 0 8 0 zombiepl 144 941 0 941 1 0 1 1 0 8 1 processpl 1152 996 0 941 5 0 5 5 0 8 0 procpl 664 1557 0 1496 7 0 7 7 0 8 0 sosppl 176 7 0 7 1 0 1 1 0 8 1 sockpl 552 1264 0 1250 12 3 9 12 0 8 8 mcl64k 65536 32 0 32 1 0 1 1 0 8 1 mcl16k 16384 7 0 7 1 0 1 1 0 8 1 mcl12k 12288 4 0 4 1 0 1 1 0 8 1 mcl9k128 9344 5 0 4 1 0 1 1 0 8 0 mcl8k 8192 11 0 11 1 0 1 1 0 8 1 mcl4k 4096 3109 0 3047 17 1 16 17 0 8 8 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 545 0 545 2 0 2 2 0 8 2 mtagpl 96 11 0 10 1 0 1 1 0 8 0 mbufpl 256 9489 0 9309 20 0 20 20 0 8 6 bufpl 272 6290 0 104 413 0 413 413 0 8 0 anonpl 24 156936 0 154794 69 0 69 69 0 88 39 amapchunkpl 152 22864 0 22517 25 0 25 25 0 158 11 amappl16 200 2347 0 2325 31 19 12 27 0 8 8 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 566 0 565 1 0 1 1 0 8 0 amappl13 176 145 0 141 1 0 1 1 0 8 0 amappl12 168 1255 0 1234 2 0 2 2 0 8 0 amappl11 160 4 0 3 1 0 1 1 0 8 0 amappl10 152 58 0 56 1 0 1 1 0 8 0 amappl9 144 272 0 272 1 0 1 1 0 8 1 amappl8 136 170 0 169 1 0 1 1 0 8 0 amappl7 128 168 0 163 1 0 1 1 0 8 0 amappl6 120 279 0 278 1 0 1 1 0 8 0 amappl5 112 98 0 94 1 0 1 1 0 8 0 amappl4 104 310 0 302 1 0 1 1 0 8 0 amappl3 96 4362 0 4284 3 0 3 3 0 8 0 amappl2 88 652 0 625 2 0 2 2 0 8 0 amappl1 80 13869 0 13559 15 0 15 15 0 8 4 amappl 88 6211 0 6094 4 0 4 4 0 92 0 uvmvnodes 80 113 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 254 0 254 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 963 0 941 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 963 0 941 1 0 1 1 0 8 0 vmmpekpl 168 9357 0 9315 3 0 3 3 0 8 0 vmmpepl 168 69809 0 68630 101 0 101 101 0 357 42 vmsppl 368 962 0 941 4 0 4 4 0 8 1 rwobjpl 40 21582 0 20976 15 0 15 15 0 8 4 pdppl 4096 1932 0 1882 128 74 54 76 0 8 4 pvpl 32 424073 0 418303 144 0 144 144 0 265 72 pmappl 216 962 0 941 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 829 0 75 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace pvclock_get(ffffffff83937fb0) at pvclock_get+0x53 pvclock_read_begin sys/dev/pv/pvclock.c:278 [inline] pvclock_get(ffffffff83937fb0) at pvclock_get+0x53 sys/dev/pv/pvclock.c:333 nsecuptime() at nsecuptime+0x62 tc_delta sys/kern/kern_tc.c:138 [inline] nsecuptime() at nsecuptime+0x62 binuptime sys/kern/kern_tc.c:191 [inline] nsecuptime() at nsecuptime+0x62 sys/kern/kern_tc.c:257 clockintr_dispatch(ffff80002a778df0) at clockintr_dispatch+0xe8 sys/kern/kern_clockintr.c:180 lapic_clockintr(0,0) at lapic_clockintr+0x43 sys/arch/amd64/amd64/lapic.c:482 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a __sanitizer_cov_trace_const_cmp4(ffffffff836d59b0,fffff7807170fa60) at __sanitizer_cov_trace_const_cmp4+0x16 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(ffffffff836d59b0,fffff7807170fa60) at __sanitizer_cov_trace_const_cmp4+0x16 sys/dev/kcov.c:230 uvm_pagelookup(fffff7807170fa50,355000) at uvm_pagelookup+0x51 uvm_objtree_RBT_FIND sys/uvm/uvm_object.h:93 [inline] uvm_pagelookup(fffff7807170fa50,355000) at uvm_pagelookup+0x51 sys/uvm/uvm_page.c:1171 buf_free_pages(fffff7807170f998) at buf_free_pages+0xec sys/kern/vfs_biomem.c:-1 buf_dealloc_mem(fffff7807170f998) at buf_dealloc_mem+0x14e sys/kern/vfs_biomem.c:179 buf_put(fffff7807170f998) at buf_put+0x1d9 sys/kern/vfs_bio.c:119 brelse(fffff7807170f998) at brelse+0x395 sys/kern/vfs_bio.c:801 writedisklabel(d02,ffffffff81561a10,ffff800000039000) at writedisklabel+0x1b5 sys/arch/amd64/amd64/disksubr.c:158 sdioctl(d01,84946467,ffff800001585800,3,ffff8000380bbca8) at sdioctl+0x959 sys/scsi/sd.c:919 VOP_IOCTL(fffff780674d4050,84946467,ffff800001585800,3,fffff78007ffd8f0,ffff8000380bbca8) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffff7806f2397f8,84946467,ffff800001585800,ffff8000380bbca8) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff8000380bbca8,ffff80002a779580,ffff80002a7794d0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002a779580) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a779580) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d45ff377f0, count: -18 ddb> machine ddbcpu 1 No such command ddb> trace pvclock_get(ffffffff83937fb0) at pvclock_get+0x53 pvclock_read_begin sys/dev/pv/pvclock.c:278 [inline] pvclock_get(ffffffff83937fb0) at pvclock_get+0x53 sys/dev/pv/pvclock.c:333 nsecuptime() at nsecuptime+0x62 tc_delta sys/kern/kern_tc.c:138 [inline] nsecuptime() at nsecuptime+0x62 binuptime sys/kern/kern_tc.c:191 [inline] nsecuptime() at nsecuptime+0x62 sys/kern/kern_tc.c:257 clockintr_dispatch(ffff80002a778df0) at clockintr_dispatch+0xe8 sys/kern/kern_clockintr.c:180 lapic_clockintr(0,0) at lapic_clockintr+0x43 sys/arch/amd64/amd64/lapic.c:482 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a __sanitizer_cov_trace_const_cmp4(ffffffff836d59b0,fffff7807170fa60) at __sanitizer_cov_trace_const_cmp4+0x16 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(ffffffff836d59b0,fffff7807170fa60) at __sanitizer_cov_trace_const_cmp4+0x16 sys/dev/kcov.c:230 uvm_pagelookup(fffff7807170fa50,355000) at uvm_pagelookup+0x51 uvm_objtree_RBT_FIND sys/uvm/uvm_object.h:93 [inline] uvm_pagelookup(fffff7807170fa50,355000) at uvm_pagelookup+0x51 sys/uvm/uvm_page.c:1171 buf_free_pages(fffff7807170f998) at buf_free_pages+0xec sys/kern/vfs_biomem.c:-1 buf_dealloc_mem(fffff7807170f998) at buf_dealloc_mem+0x14e sys/kern/vfs_biomem.c:179 buf_put(fffff7807170f998) at buf_put+0x1d9 sys/kern/vfs_bio.c:119 brelse(fffff7807170f998) at brelse+0x395 sys/kern/vfs_bio.c:801 writedisklabel(d02,ffffffff81561a10,ffff800000039000) at writedisklabel+0x1b5 sys/arch/amd64/amd64/disksubr.c:158 sdioctl(d01,84946467,ffff800001585800,3,ffff8000380bbca8) at sdioctl+0x959 sys/scsi/sd.c:919 VOP_IOCTL(fffff780674d4050,84946467,ffff800001585800,3,fffff78007ffd8f0,ffff8000380bbca8) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffff7806f2397f8,84946467,ffff800001585800,ffff8000380bbca8) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff8000380bbca8,ffff80002a779580,ffff80002a7794d0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002a779580) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a779580) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d45ff377f0, count: -18