uvm_fault(0xffffffff82e3b2c0, 0xffff800024ea2058, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0x76e: movq 0(%rcx,%rax,8),%r15 TID PID UID PRFLAGS PFLAGS CPU COMMAND ffs2_balloc(fffffd8077913f08,5c680,40,fffffd807f7d7750,1,ffff80002d9111c8) at ffs2_balloc+0x76e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002d911260) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806c469b50,ffff80002d9112f8,23,fffffd807f7d7750) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806c469b50,ffff80002d9113e8,40,0,1,8a07d25c9caad569,0,ffff80002a6672b8,fffffd806c469b50) at vn_rdwr+0xed sys/kern/vfs_vnops.c:324 acct_process(ffff80002a6672b8) at acct_process+0x62c sys/kern/kern_acct.c:243 exit1(ffff80002a6672b8,0,0,1) at exit1+0x391 sys/kern/kern_exit.c:212 sys_exit(ffff80002a6672b8,ffff80002d911640,ffff80002d911590) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002d911640) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c88f4be67c0, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff82e3b2c0, 0xffff800024ea2058, 0, 1) -> d ddb> trace ffs2_balloc(fffffd8077913f08,5c680,40,fffffd807f7d7750,1,ffff80002d9111c8) at ffs2_balloc+0x76e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002d911260) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806c469b50,ffff80002d9112f8,23,fffffd807f7d7750) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806c469b50,ffff80002d9113e8,40,0,1,8a07d25c9caad569,0,ffff80002a6672b8,fffffd806c469b50) at vn_rdwr+0xed sys/kern/vfs_vnops.c:324 acct_process(ffff80002a6672b8) at acct_process+0x62c sys/kern/kern_acct.c:243 exit1(ffff80002a6672b8,0,0,1) at exit1+0x391 sys/kern/kern_exit.c:212 sys_exit(ffff80002a6672b8,ffff80002d911640,ffff80002d911590) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002d911640) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c88f4be67c0, count: -9 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002d911180 rbx 0x1 rdx 0 rcx 0xffff800024ea2000 rax 0xb r8 0xffffffffffffffff r9 0xffff80002d9111c8 r10 0x8de488fd25fb4830 r11 0x390e00ddab32c55 r12 0x10 r13 0xfffffd8073615008 r14 0 r15 0xffffffff rip 0xffffffff8271764e ffs2_balloc+0x76e cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002d911010 ss 0x10 ffs2_balloc+0x76e: movq 0(%rcx,%rax,8),%r15 ddb> show proc PROC (syz-executor.7) tid=52391 pid=75554 tcnt=1 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a6672b8 forw=0xffffffffffffffff, list=0xffff80002a666d68,0xffffffff82e37ad8 process=0xffff8000ffff4010 user=0xffff80002d90c000, vmspace=0xfffffd8068226df0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 68709 295884 90516 0 2 0 syz-executor.1 68709 406730 90516 0 2 0x4000000 syz-executor.1 84220 468520 86533 0 2 0 syz-executor.6 84220 149729 86533 0 3 0x4000080 fsleep syz-executor.6 60010 327545 19577 0 2 0 syz-executor.4 60010 202261 19577 0 3 0x4000080 fsleep syz-executor.4 11374 305229 17790 -1 2 0x10 syz-executor.2 11374 338435 17790 -1 3 0x4000090 fsleep syz-executor.2 27811 431069 78118 0 2 0 syz-executor.5 27811 17257 78118 0 3 0x4000080 fsleep syz-executor.5 27811 294161 78118 0 3 0x4000080 fsleep syz-executor.5 70579 138984 52900 0 2 0x2 syz-executor.3 67859 282295 52900 0 3 0x82 nanoslp syz-executor.7 86533 191750 52900 0 3 0x82 nanoslp syz-executor.6 19577 482832 52900 0 3 0x82 nanoslp syz-executor.4 78118 517567 52900 0 3 0x82 nanoslp syz-executor.5 90516 178629 52900 0 3 0x82 nanoslp syz-executor.1 17790 443761 52900 0 3 0x82 nanoslp syz-executor.2 9611 523008 0 0 3 0x14280 nfsidl nfsio 54981 519630 0 0 3 0x14280 nfsidl nfsio 86053 16516 0 0 3 0x14280 nfsidl nfsio 5483 394799 0 0 3 0x14280 nfsidl nfsio 1745 362539 0 0 3 0x14280 nfsidl nfsio 91858 377472 0 0 3 0x14280 nfsidl nfsio 92620 95789 0 0 3 0x14280 nfsidl nfsio 59720 504181 0 0 3 0x14280 nfsidl nfsio 19602 424615 0 0 3 0x14280 nfsidl nfsio 23094 341613 0 0 3 0x14280 nfsidl nfsio 67370 230227 0 0 3 0x14280 nfsidl nfsio 66148 132583 0 0 3 0x14280 nfsidl nfsio 42762 217936 0 0 3 0x14280 nfsidl nfsio 38551 444819 0 0 3 0x14280 nfsidl nfsio 2198 7577 0 0 3 0x14280 nfsidl nfsio 59858 453576 0 0 3 0x14280 nfsidl nfsio 25255 358631 0 0 3 0x14280 nfsidl nfsio 63993 425702 0 0 3 0x14280 nfsidl nfsio 94237 224904 0 0 3 0x14280 nfsidl nfsio 86930 116384 0 0 3 0x14280 nfsidl nfsio 74183 103732 52900 0 2 0x2 syz-executor.0 91787 63139 1 0 3 0x100083 ttyopn getty 52552 153878 0 0 3 0x14200 bored sosplice 75525 377525 0 0 3 0x14200 acct acct 52900 35327 9842 0 3 0x2000082 thrsleep syz-fuzzer 52900 333163 9842 0 3 0x6000082 nanoslp syz-fuzzer 52900 202628 9842 0 3 0x6000082 wait syz-fuzzer 52900 372440 9842 0 3 0x6000082 wait syz-fuzzer 52900 227243 9842 0 3 0x6000082 wait syz-fuzzer 52900 85540 9842 0 3 0x6000082 wait syz-fuzzer 52900 67327 9842 0 3 0x6000082 wait syz-fuzzer 52900 34374 9842 0 3 0x6000082 thrsleep syz-fuzzer 52900 400043 9842 0 3 0x6000082 wait syz-fuzzer 52900 435554 9842 0 3 0x6000082 wait syz-fuzzer 52900 115202 9842 0 3 0x6000082 thrsleep syz-fuzzer 52900 387119 9842 0 3 0x6000082 thrsleep syz-fuzzer 52900 57108 9842 0 3 0x6000082 kqread syz-fuzzer 52900 339977 9842 0 3 0x6000082 wait syz-fuzzer 9842 312292 77882 0 3 0x10008a sigsusp ksh 77882 301209 92334 0 3 0x9a kqread sshd 92334 238875 1 0 3 0x88 kqread sshd 2963 147022 39180 73 3 0x1100090 kqread syslogd 39180 281612 1 0 3 0x100082 netio syslogd 14878 484154 1 0 3 0x100080 kqread resolvd 30065 90300 89674 77 3 0x100092 kqread dhcpleased 10720 146658 89674 77 3 0x100092 kqread dhcpleased 89674 427727 1 0 3 0x80 kqread dhcpleased 63380 71242 0 0 3 0x14200 bored smr 81762 111876 0 0 2 0x14200 zerothread 36264 413801 0 0 3 0x14200 aiodoned aiodoned 68740 70115 0 0 3 0x14200 syncer update 44285 36352 0 0 3 0x14200 cleaner cleaner 21937 451103 0 0 3 0x14200 reaper reaper 61464 56893 0 0 3 0x14200 pgdaemon pagedaemon 43566 171056 0 0 3 0x14200 bored viomb 30011 290651 0 0 3 0x40014200 acpi0 acpi0 60646 81351 0 0 3 0x14200 bored softnet3 34002 404115 0 0 3 0x14200 bored softnet2 88253 246334 0 0 3 0x14200 bored softnet1 21757 276392 0 0 3 0x14200 bored softnet0 34380 327635 0 0 3 0x14200 bored systqmp 67315 277183 0 0 3 0x14200 bored systq 27588 475315 0 0 3 0x40014200 tmoslp softclock 2295 33644 0 0 3 0x40014200 idle0 1 447137 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 10177 6425K 7318K 166960K 37408 0 pcb 15 16K 18K 166960K 1084 0 rtable 206 14K 15K 166960K 3010 0 pf 30 9K 10K 166960K 330 0 ifaddr 38 12K 12K 166960K 404 0 ifgroup 51 2K 2K 166960K 561 0 sysctl 3 0K 0K 166960K 9 0 counters 30 17K 17K 166960K 175 0 ioctlops 0 0K 2K 166960K 715 0 iov 0 0K 32K 166960K 1343 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1469 92K 92K 166960K 9794 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 143 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 1699 0 dirhash 12 2K 2K 166960K 54 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 77K 166960K 12007 0 sigio 0 0K 0K 166960K 528 0 proc 58 59K 92K 166960K 2660 0 subproc 104 6K 6K 166960K 988 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 871 0 in_multi 77 5K 7K 166960K 955 0 ether_multi 1 0K 0K 166960K 9 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 2699 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 458 364K 367K 166960K 108744 0 UVM aobj 131 4K 4K 166960K 131 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 288 0 NDP 11 0K 2K 166960K 308 0 temp 74 6764K 7138K 166960K 98422 0 kqueue 12 18K 27K 166960K 929 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 120 853 0 850 3 2 1 3 0 8 0 rtentry 112 931 0 838 5 2 3 4 0 8 0 unpcb 144 8935 0 8788 16 10 6 6 0 8 0 syncache 336 130 0 130 3 2 1 1 0 8 1 tcpqe 32 353 0 353 3 2 1 1 0 8 1 tcpcb 808 3590 0 3564 24 14 10 10 0 8 7 arp 88 181 0 164 1 0 1 1 0 8 0 ipq 40 8 0 6 2 1 1 1 0 8 0 ipqe 40 24 0 22 2 1 1 1 0 8 0 inpcb 360 8607 0 8575 32 23 9 14 0 8 6 nd6 104 231 0 213 1 0 1 1 0 8 0 pkpcb 40 32 0 32 2 2 0 1 0 8 0 kcovpl 48 76 0 68 1 0 1 1 0 8 0 ppxss 1072 41 0 41 3 2 1 1 0 8 1 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 3617 0 3226 48 21 27 29 0 8 2 art_table 32 3619 0 3227 5 1 4 4 0 8 0 art_node 16 926 0 842 1 0 1 1 0 8 0 sysvmsgpl 40 76 0 36 1 0 1 1 0 8 0 semapl 112 1697 0 1687 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 45 0 28 3 0 3 3 0 8 0 dino2pl 256 16986 0 15511 93 0 93 93 0 8 0 ffsino 240 16986 0 15511 87 0 87 87 0 8 0 nchpl 144 32765 0 31118 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 113876 0 113876 4 3 1 3 0 8 1 vcpupl 2048 77 0 1 10 0 10 10 0 8 0 vmpool 664 83 0 7 7 0 7 7 0 8 0 kstatmem 264 312 0 290 2 0 2 2 0 8 0 scxspl 216 101636 0 101636 12 10 2 8 1 8 2 plimitpl 152 1190 0 1175 1 0 1 1 0 8 0 sigapl 424 12266 0 12201 8 0 8 8 0 8 0 futexpl 64 105248 0 105243 1 0 1 1 0 8 0 knotepl 120 103035 0 102953 25 19 6 15 0 8 2 kqueuepl 184 2547 0 2539 12 9 3 7 0 8 2 pipepl 288 1793 0 1765 15 8 7 7 0 8 4 fdescpl 432 12148 0 12122 4 0 4 4 0 8 0 filepl 120 70534 0 70164 28 14 14 17 0 8 2 lockfpl 104 4111 0 4109 2 1 1 2 0 8 0 lockfspl 48 1437 0 1435 1 0 1 1 0 8 0 sessionpl 144 93 0 77 1 0 1 1 0 8 0 pgrppl 48 412 0 396 1 0 1 1 0 8 0 ucredpl 104 10406 0 10392 1 0 1 1 0 8 0 zombiepl 144 12202 0 12201 1 0 1 1 0 8 0 processpl 1072 12266 0 12201 5 0 5 5 0 8 0 procpl 680 28781 0 28697 10 1 9 9 0 8 0 sosppl 168 161 0 158 3 2 1 1 0 8 0 sockpl 488 18457 0 18278 279 256 23 30 0 8 0 mcl64k 65536 484 0 484 3 2 1 1 0 8 1 mcl16k 16384 274 0 274 3 2 1 1 0 8 1 mcl12k 12288 407 0 407 3 2 1 1 0 8 1 mcl9k 9216 172 0 172 3 2 1 1 0 8 1 mcl8k 8192 853 0 853 3 2 1 1 0 8 1 mcl4k 4096 1159 0 1159 3 2 1 1 0 8 1 mcl2k2 2112 68 0 68 3 2 1 1 0 8 1 mcl2k 2048 94818 0 94764 54 45 9 30 0 8 1 mtagpl 96 3604 0 3516 24 21 3 17 0 8 0 mbufpl 256 262052 0 261835 801 781 20 463 0 8 3 bufpl 280 24840 0 18450 457 0 457 457 0 8 0 anonpl 24 1259479 0 1246302 121 13 108 115 0 188 1 amapchunkpl 152 346928 0 346042 57 11 46 46 0 158 8 amappl16 200 26607 0 26187 70 46 24 35 0 8 0 amappl15 192 40 0 40 2 2 0 1 0 8 0 amappl14 184 380 0 363 2 1 1 2 0 8 0 amappl13 176 24 0 24 2 2 0 1 0 8 0 amappl12 168 13785 0 13757 2 0 2 2 0 8 0 amappl11 160 56 0 46 1 0 1 1 0 8 0 amappl10 152 100 0 87 1 0 1 1 0 8 0 amappl9 144 262 0 262 3 2 1 1 0 8 1 amappl8 136 556 0 460 4 0 4 4 0 8 0 amappl7 128 350 0 326 2 0 2 2 0 8 0 amappl6 120 1396 0 1380 1 0 1 1 0 8 0 amappl5 112 336 0 326 1 0 1 1 0 8 0 amappl4 104 982 0 959 2 1 1 2 0 8 0 amappl3 96 67559 0 67469 3 0 3 3 0 8 0 amappl2 88 13419 0 13344 3 1 2 3 0 8 0 amappl1 80 55739 0 55228 22 10 12 22 0 8 0 amappl 88 107415 0 107140 7 0 7 7 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 12231 0 12128 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12231 0 12128 1 0 1 1 0 8 0 vmmpekpl 168 84256 0 84186 4 0 4 4 0 8 0 vmmpepl 168 744607 0 742112 171 31 140 143 0 357 9 vmsppl 352 12230 0 12128 10 0 10 10 0 8 0 rwobjpl 24 175478 0 167906 48 0 48 48 0 8 0 pdppl 4096 24468 0 24332 793 653 140 144 0 8 4 pvpl 32 3531066 0 3512016 374 189 185 304 0 265 1 pmappl 216 12230 0 12128 6 0 6 6 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1962 0 1539 24 10 14 24 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ffs2_balloc(fffffd8077913f08,5c680,40,fffffd807f7d7750,1,ffff80002d9111c8) at ffs2_balloc+0x76e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002d911260) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806c469b50,ffff80002d9112f8,23,fffffd807f7d7750) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806c469b50,ffff80002d9113e8,40,0,1,8a07d25c9caad569,0,ffff80002a6672b8,fffffd806c469b50) at vn_rdwr+0xed sys/kern/vfs_vnops.c:324 acct_process(ffff80002a6672b8) at acct_process+0x62c sys/kern/kern_acct.c:243 exit1(ffff80002a6672b8,0,0,1) at exit1+0x391 sys/kern/kern_exit.c:212 sys_exit(ffff80002a6672b8,ffff80002d911640,ffff80002d911590) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002d911640) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c88f4be67c0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace ffs2_balloc(fffffd8077913f08,5c680,40,fffffd807f7d7750,1,ffff80002d9111c8) at ffs2_balloc+0x76e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002d911260) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806c469b50,ffff80002d9112f8,23,fffffd807f7d7750) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806c469b50,ffff80002d9113e8,40,0,1,8a07d25c9caad569,0,ffff80002a6672b8,fffffd806c469b50) at vn_rdwr+0xed sys/kern/vfs_vnops.c:324 acct_process(ffff80002a6672b8) at acct_process+0x62c sys/kern/kern_acct.c:243 exit1(ffff80002a6672b8,0,0,1) at exit1+0x391 sys/kern/kern_exit.c:212 sys_exit(ffff80002a6672b8,ffff80002d911640,ffff80002d911590) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002d911640) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c88f4be67c0, count: -9