uvm_fault(0xffffffff8392e940, 0xffff800022082148, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0xa0a: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND *269642 51395 0 0x2 0x1 0 syz-executor ffs2_balloc(fffffd806c8e3000,d6c7c,48,fffffd8007ffd4e0,1,ffff80002a87d948) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a87d9d0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8067aafa70,ffff80002a87da80,3,fffffd8007ffd4e0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a746008,fffffd8067aafa70,fffffd8007ffd4e0,ffff80002a87db50,ffff80002a87db30) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691 ktrsysret(ffff80002a746008,88,16,ffff80002a87dc10) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a746008,88,16,ffff80002a87dc10) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a87dcc0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a87dcc0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x757af3bd06c0, count: 8 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(0xffffffff8392e940, 0xffff800022082148, 0, 1) -> d ddb> trace ffs2_balloc(fffffd806c8e3000,d6c7c,48,fffffd8007ffd4e0,1,ffff80002a87d948) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a87d9d0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8067aafa70,ffff80002a87da80,3,fffffd8007ffd4e0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a746008,fffffd8067aafa70,fffffd8007ffd4e0,ffff80002a87db50,ffff80002a87db30) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691 ktrsysret(ffff80002a746008,88,16,ffff80002a87dc10) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a746008,88,16,ffff80002a87dc10) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a87dcc0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a87dcc0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x757af3bd06c0, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a87d8f0 rbx 0xfffffd806c8e3000 rdx 0 rcx 0xffff800022082000 rax 0x29 r8 0xffffffffffffffff r9 0xffff80002a87d948 r10 0xb6af8f1ea514ebc9 r11 0x2b0ee29defa60c42 r12 0x1 r13 0xffff800000c47800 r14 0xffff80002a87d790 r15 0xfffffd80648fbd50 rip 0xffffffff81962aaa ffs2_balloc+0xa0a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a87d780 ss 0x10 ffs2_balloc+0xa0a: movq 0(%rcx,%rax,8),%r14 ddb> show proc PROC (syz-executor) tid=269642 pid=51395 tcnt=1 stat=onproc flags process=2 proc=1 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a746a68,0xffff80002a747ca0 process=0xffff80002a7adb10 user=0xffff80002a878000, vmspace=0xfffffd807472da18 estcpu=36, cpticks=19, pctcpu=0.5, user=3, sys=15, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 13940 204536 71404 0 2 0 syz-executor 13940 485810 71404 0 3 0x4000080 fsleep syz-executor 13940 371712 71404 0 3 0x4000080 fsleep syz-executor 11136 177320 39305 0 2 0 syz-executor 11136 474298 39305 0 2 0x4000000 syz-executor 2008 417273 54656 -1 3 0x90 nanoslp syz-executor 2008 278863 54656 -1 3 0x4000090 kqsel syz-executor 2008 121887 54656 -1 3 0x4000090 fsleep syz-executor 18792 29571 92047 0 3 0x80 nanoslp syz-executor 18792 522114 92047 0 3 0x4000080 lockf syz-executor 18792 358093 92047 0 3 0x4000080 lockf syz-executor 18792 327601 92047 0 3 0x4000080 fsleep syz-executor 95298 160160 78986 0 3 0x80 nanoslp syz-executor 95298 419907 78986 0 3 0x4000080 pipewr syz-executor 95298 56492 78986 0 3 0x4000080 fsleep syz-executor 54656 482608 55369 0 3 0x82 nanoslp syz-executor 71404 476403 55369 0 3 0x82 nanoslp syz-executor 86443 517627 0 0 3 0x14280 nfsidl nfsio 61151 493471 0 0 3 0x14280 nfsidl nfsio 67346 18378 0 0 3 0x14280 nfsidl nfsio 7529 134713 0 0 3 0x14280 nfsidl nfsio 98760 316589 0 0 3 0x14280 nfsidl nfsio 43080 270479 0 0 3 0x14280 nfsidl nfsio 53689 398578 0 0 3 0x14280 nfsidl nfsio 35575 143577 0 0 3 0x14280 nfsidl nfsio 50871 193336 0 0 3 0x14280 nfsidl nfsio 43988 53183 0 0 3 0x14280 nfsidl nfsio 9604 23810 0 0 3 0x14280 nfsidl nfsio 48907 109265 0 0 3 0x14280 nfsidl nfsio 63646 162863 0 0 3 0x14280 nfsidl nfsio 23522 271839 0 0 3 0x14280 nfsidl nfsio 40628 434670 0 0 3 0x14280 nfsidl nfsio 92179 218593 0 0 3 0x14280 nfsidl nfsio 15102 421808 0 0 3 0x14280 nfsidl nfsio 17280 499441 0 0 3 0x14280 nfsidl nfsio 28649 56714 0 0 3 0x14280 nfsidl nfsio 28728 138988 0 0 3 0x14280 nfsidl nfsio 9112 267937 1 0 3 0x100083 ttyin getty 78986 144723 55369 0 3 0x82 nanoslp syz-executor *51395 269642 55369 0 7 0x3 syz-executor 92047 18940 55369 0 3 0x82 nanoslp syz-executor 39305 153953 55369 0 2 0xc82 syz-executor 21447 67764 55369 0 3 0x82 wait syz-executor 8661 214014 55369 0 3 0x82 wait syz-executor 55369 76134 66845 0 3 0x82 kqread syz-executor 66845 196057 50285 0 3 0x10008a sigsusp ksh 50285 218309 54702 0 3 0x98 kqread sshd-session 54702 6130 55175 0 3 0x92 kqread sshd-session 55175 177332 1 0 3 0x88 kqread sshd 155 17439 87402 73 3 0x1100090 kqread syslogd 87402 16419 1 0 3 0x100082 sbwait syslogd 20445 15568 1 0 3 0x100080 kqread resolvd 30698 462049 21777 77 3 0x100092 kqread dhcpleased 46670 307465 21777 77 3 0x100092 kqread dhcpleased 21777 138367 1 0 3 0x80 kqread dhcpleased 83118 80555 0 0 3 0x14200 bored smr 10905 296212 0 0 2 0x14200 zerothread 39443 475403 0 0 3 0x14200 aiodoned aiodoned 26559 150393 0 0 3 0x14200 syncer update 22068 325800 0 0 3 0x14200 cleaner cleaner 4264 2434 0 0 3 0x14200 reaper reaper 99292 313383 0 0 3 0x14200 pgdaemon pagedaemon 17055 461811 0 0 3 0x14200 bored viomb 21522 4219 0 0 3 0x40014200 acpi0 acpi0 7062 515596 0 0 3 0x14200 bored softnet0 382 387834 0 0 3 0x14200 smrbar systqmp 56529 510648 0 0 3 0x14200 bored systq 34059 245946 0 0 3 0x40014200 tmoslp softclock 19716 289428 0 0 3 0x40014200 idle0 1 54284 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11071 12130K 12575K 166960K 13389 0 pcb 17 18K 23K 166960K 495 0 rtable 177 14K 16K 166960K 574 0 pf 34 13K 21K 166960K 141 0 ifaddr 31 5K 7K 166960K 87 0 ifgroup 50 2K 2K 166960K 123 0 sysctl 4 1K 9K 166960K 16 0 counters 33 17K 18K 166960K 67 0 ioctlops 0 0K 4K 166960K 530 0 iov 0 0K 16K 166960K 40 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1375 86K 87K 166960K 2347 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 152 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 1154 0 sigio 0 0K 0K 166960K 14 0 proc 60 59K 83K 166960K 678 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 147 0 in_multi 55 4K 7K 166960K 178 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 24 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 688 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 232 152K 170K 166960K 11886 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 38 76K 96K 166960K 2350 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 44 0 NDP 11 0K 2K 166960K 60 0 temp 77 9076K 9142K 166960K 34169 0 kqueue 14 22K 36K 166960K 246 0 SYN cache 2 16K 24K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 108 0 105 1 0 1 1 0 8 0 rtentry 136 169 0 104 4 0 4 4 0 8 0 unpcb 144 904 0 887 10 2 8 8 0 8 7 syncache 336 10 0 10 2 1 1 1 0 8 1 tcpqe 32 5 0 5 1 0 1 1 0 8 1 tcpcb 736 284 0 277 2 0 2 2 0 8 0 arp 96 27 0 15 1 0 1 1 0 8 0 ipq 40 8 0 1 1 0 1 1 0 8 0 ipqe 40 87 0 78 1 0 1 1 0 8 0 inpcb 328 1483 0 1472 15 5 10 10 0 8 8 ip6q 72 69 0 66 1 0 1 1 0 8 0 ip6af 40 137 0 133 1 0 1 1 0 8 0 nd6 112 42 0 25 1 0 1 1 0 8 0 pkpcb 40 13 0 13 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 26 0 26 1 0 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfrktable 1344 4 0 4 1 0 1 1 0 8 1 pfsrclim 320 3 0 3 1 0 1 1 0 8 1 pfstlim 224 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pfqueue 320 2 0 2 1 0 1 1 0 8 1 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 7 0 3 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1360 14 0 14 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 707 0 385 29 0 29 29 0 8 6 art_table 40 709 0 385 5 0 5 5 0 8 0 art_node 32 167 0 113 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 2 1 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 146 0 136 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3582 0 2134 92 0 92 92 0 8 0 ffsino 256 3582 0 2134 92 0 92 92 0 8 0 nchpl 144 5223 0 3520 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 vnodes 216 3962 0 0 221 0 221 221 0 8 0 namei 1024 17784 0 17784 3 2 1 2 0 8 1 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 74 0 52 2 0 2 2 0 8 0 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 23543 0 23543 9 7 2 8 1 8 2 plimitpl 152 313 0 295 1 0 1 1 0 8 0 sigapl 424 1476 0 1414 9 1 8 8 0 8 0 knotepl 120 43618 0 43323 28 12 16 17 0 8 6 kqueuepl 184 446 0 434 5 2 3 4 0 8 2 pipepl 304 273 0 245 4 0 4 4 0 8 1 fdescpl 448 1439 0 1410 5 1 4 5 0 8 0 filepl 120 9604 0 9379 19 4 15 15 0 8 6 lockfpl 104 627 0 622 2 0 2 2 0 8 1 lockfspl 48 242 0 239 1 0 1 1 0 8 0 sessionpl 144 123 0 115 1 0 1 1 0 8 0 pgrppl 48 176 0 160 1 0 1 1 0 8 0 ucredpl 104 1620 0 1606 1 0 1 1 0 8 0 zombiepl 144 1416 0 1414 1 0 1 1 0 8 0 processpl 1152 1476 0 1414 5 0 5 5 0 8 0 procpl 664 2957 0 2885 8 0 8 8 0 8 1 sosppl 176 11 0 10 2 1 1 1 0 8 0 sockpl 552 2585 0 2554 25 13 12 17 0 8 8 mcl64k 65536 155 0 155 1 0 1 1 0 8 1 mcl16k 16384 5 0 5 2 1 1 1 0 8 1 mcl12k 12288 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 27 0 27 2 1 1 1 0 8 1 mcl4k 4096 3958 0 3905 16 7 9 15 0 8 2 mcl2k2 2112 9 0 9 1 0 1 1 0 8 1 mcl2k 2048 1240 0 1235 3 0 3 3 0 8 2 mtagpl 96 23 0 16 1 0 1 1 0 8 0 mbufpl 256 15056 0 14912 18 3 15 15 0 8 1 bufpl 280 9313 0 3099 445 0 445 445 0 8 0 anonpl 24 219874 0 216613 86 1 85 85 0 187 49 amapchunkpl 152 40419 0 39917 41 7 34 34 0 158 12 amappl16 200 4041 0 4007 39 24 15 36 0 8 7 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 429 0 428 1 0 1 1 0 8 0 amappl13 176 132 0 121 1 0 1 1 0 8 0 amappl12 168 1686 0 1658 2 0 2 2 0 8 0 amappl11 160 17 0 17 1 1 0 1 0 8 0 amappl10 152 59 0 49 1 0 1 1 0 8 0 amappl9 144 313 0 313 1 1 0 1 0 8 0 amappl8 136 104 0 103 1 0 1 1 0 8 0 amappl7 128 222 0 210 1 0 1 1 0 8 0 amappl6 120 173 0 171 1 0 1 1 0 8 0 amappl5 112 105 0 97 1 0 1 1 0 8 0 amappl4 104 293 0 276 1 0 1 1 0 8 0 amappl3 96 8053 0 7937 4 0 4 4 0 8 0 amappl2 88 617 0 561 2 0 2 2 0 8 0 amappl1 80 16250 0 15710 15 0 15 15 0 8 2 amappl 88 10909 0 10740 5 0 5 5 0 92 0 uvmvnodes 80 137 0 0 3 0 3 3 0 8 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 9 0 9 2 1 1 1 0 8 1 dma128 128 257 0 257 2 1 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1439 0 1410 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1439 0 1410 1 0 1 1 0 8 0 vmmpekpl 168 13274 0 13226 3 0 3 3 0 8 0 vmmpepl 168 99565 0 97764 110 1 109 109 0 357 23 vmsppl 368 1438 0 1410 4 1 3 4 0 8 0 rwobjpl 40 28525 0 27518 18 1 17 17 0 8 2 pdppl 4096 2884 0 2820 114 44 70 82 0 8 6 pvpl 32 636882 0 628045 173 6 167 167 0 265 72 pmappl 216 1438 0 1410 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 395 0 63 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ffs2_balloc(fffffd806c8e3000,d6c7c,48,fffffd8007ffd4e0,1,ffff80002a87d948) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a87d9d0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8067aafa70,ffff80002a87da80,3,fffffd8007ffd4e0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a746008,fffffd8067aafa70,fffffd8007ffd4e0,ffff80002a87db50,ffff80002a87db30) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691 ktrsysret(ffff80002a746008,88,16,ffff80002a87dc10) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a746008,88,16,ffff80002a87dc10) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a87dcc0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a87dcc0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x757af3bd06c0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace ffs2_balloc(fffffd806c8e3000,d6c7c,48,fffffd8007ffd4e0,1,ffff80002a87d948) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a87d9d0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8067aafa70,ffff80002a87da80,3,fffffd8007ffd4e0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a746008,fffffd8067aafa70,fffffd8007ffd4e0,ffff80002a87db50,ffff80002a87db30) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691 ktrsysret(ffff80002a746008,88,16,ffff80002a87dc10) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a746008,88,16,ffff80002a87dc10) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a87dcc0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a87dcc0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x757af3bd06c0, count: -7