uvm_fault(0xffffffff838fce98, 0xffff800028da2068, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 127992 10026 0 0 0 1 syz-executor * 64149 11941 0 0x2 0x1 0K syz-executor ffs2_balloc(fffffd806bd69850,663bb,48,fffffd80097fb888,1,ffff80002a2f7f58) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a2f7fe0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805f3f3450,ffff80002a2f8090,3,fffffd80097fb888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffffd4c8,fffffd805f3f3450,fffffd80097fb888,ffff80002a2f8160,ffff80002a2f8140) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691 ktrsysret(ffff8000ffffd4c8,88,16,ffff80002a2f8230) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffd4c8,88,16,ffff80002a2f8230) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a2f82e0) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a2f82e0) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:767 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7334746dc570, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff838fce98, 0xffff800028da2068, 0, 1) -> d ddb{0}> trace ffs2_balloc(fffffd806bd69850,663bb,48,fffffd80097fb888,1,ffff80002a2f7f58) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a2f7fe0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805f3f3450,ffff80002a2f8090,3,fffffd80097fb888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffffd4c8,fffffd805f3f3450,fffffd80097fb888,ffff80002a2f8160,ffff80002a2f8140) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691 ktrsysret(ffff8000ffffd4c8,88,16,ffff80002a2f8230) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffd4c8,88,16,ffff80002a2f8230) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a2f82e0) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a2f82e0) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:767 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7334746dc570, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2f7f00 rbx 0 rdx 0 rcx 0xffff800028da2000 rax 0xd r8 0xffffffffffffffff r9 0xffff80002a2f7f58 r10 0x49a2cc8b201ce1a1 r11 0xd311296af25f5d8a r12 0x1 r13 0xffff800000b2d800 r14 0xffff80002a2f7d90 r15 0xfffffd805e0098c8 rip 0xffffffff81e6aa2d ffs2_balloc+0xa0d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a2f7d80 ss 0x10 ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ddb{0}> show proc PROC (syz-executor) tid=64149 pid=11941 tcnt=1 stat=onproc flags process=2 proc=1 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffdc90,0xffff80002a272020 process=0xffff8000ffff1350 user=0xffff80002a2f3000, vmspace=0xfffffd806e3ce5c8 estcpu=36, cpticks=46, pctcpu=0.19, user=1, sys=43, intr=2 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 68557 307217 684 0 2 0 syz-executor 10026 127992 63412 0 7 0 syz-executor 10026 348122 63412 0 2 0x4000000 syz-executor 71505 336284 7629 0 2 0 syz-executor 71505 80577 7629 0 2 0x4000000 syz-executor 71505 139913 7629 0 3 0x4000080 fsleep syz-executor 43940 445026 36994 0 2 0xc90 syz-executor 43940 187916 36994 0 3 0x4000090 ttyin syz-executor 43940 221868 36994 0 3 0x4000090 ttyin syz-executor 43940 114732 36994 0 3 0x4000090 fsleep syz-executor 17193 271921 45020 0 3 0x3000 suspend syz-executor 17193 296493 45020 0 2 0x4081000 syz-executor 36389 504308 0 0 3 0x14200 bored sosplice 684 356835 54645 0 2 0xc82 syz-executor 7629 430774 54645 0 2 0xc82 syz-executor 45020 487157 54645 0 2 0x2 syz-executor 36994 16130 54645 0 2 0xc82 syz-executor 83347 449476 54645 0 2 0xc82 syz-executor 8664 210140 54645 0 2 0x2 syz-executor 63412 31893 54645 0 2 0x2 syz-executor *11941 64149 54645 0 7 0x3 syz-executor 54645 319683 1725 0 3 0x82 kqread syz-executor 1725 209630 19388 0 3 0x10008a sigsusp ksh 19388 512363 12380 0 3 0x98 kqread sshd-session 12380 361745 31518 0 3 0x92 kqread sshd-session 6942 414101 1 0 3 0x100083 ttyopn getty 31518 400757 1 0 3 0x88 kqread sshd 75754 16417 2413 74 3 0x1100092 bpf pflogd 2413 315098 1 0 3 0x80 sbwait pflogd 71675 509960 43230 73 3 0x1100090 kqread syslogd 43230 518563 1 0 3 0x100082 sbwait syslogd 14768 67948 1 0 3 0x100080 kqread resolvd 69528 81480 42211 77 3 0x100092 kqread dhcpleased 18501 214188 42211 77 3 0x100092 kqread dhcpleased 42211 190662 1 0 3 0x80 kqread dhcpleased 74797 400805 0 0 3 0x14200 bored smr 13679 16107 0 0 2 0x14200 zerothread 89399 440110 0 0 3 0x14200 aiodoned aiodoned 59134 216088 0 0 3 0x14200 syncer update 11778 98176 0 0 3 0x14200 cleaner cleaner 91383 290150 0 0 3 0x14200 reaper reaper 90760 142015 0 0 3 0x14200 pgdaemon pagedaemon 86587 267342 0 0 3 0x14200 bored viomb 70452 57326 0 0 3 0x40014200 acpi0 acpi0 53929 261296 0 0 3 0x40014200 idle1 57179 213008 0 0 3 0x14200 bored softnet1 43557 261547 0 0 3 0x14200 bored softnet0 97027 428401 0 0 3 0x14200 bored systqmp 10275 6723 0 0 3 0x14200 bored systq 8170 341732 0 0 3 0x14200 tmoslp softclockmp 96178 258582 0 0 3 0x40014200 tmoslp softclock 30161 199497 0 0 3 0x40014200 idle0 1 276173 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 17193 (syz-executor) thread 0xffff8000fffee7e0 (296493) exclusive rrwlock inode r = 0 (0xfffffd806e041418) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 Process 11941 (syz-executor) thread 0xffff8000ffffd4c8 (64149) exclusive rrwlock inode r = 0 (0xfffffd806bd698f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:688 #7 ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] #7 ktrsysret+0x192 sys/kern/kern_ktrace.c:209 #8 syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] #8 syscall+0xa50 sys/arch/amd64/amd64/trap.c:767 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838f9630) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] #1 ktrsysret+0xde sys/kern/kern_ktrace.c:209 #2 syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] #2 syscall+0xa50 sys/arch/amd64/amd64/trap.c:767 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11154K 11348K 166960K 11879 0 pcb 17 15K 17K 166960K 136 0 rtable 197 7K 8K 166960K 323 0 pf 34 17K 19K 166960K 75 0 ifaddr 38 6K 8K 166960K 60 0 ifgroup 53 2K 2K 166960K 87 0 sysctl 3 1K 9K 166960K 11 0 counters 68 36K 37K 166960K 102 0 ioctlops 0 0K 4K 166960K 1535 0 iov 1 12K 28K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1337 84K 85K 166960K 1700 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 0K 166960K 47 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 599 0 sigio 0 0K 0K 166960K 10 0 proc 72 115K 148K 166960K 597 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 65 0 in_multi 78 5K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 7 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 462 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 243 168K 177K 166960K 7139 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 42 84K 104K 166960K 1687 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 78 0 NDP 12 0K 2K 166960K 41 0 temp 77 8652K 8720K 166960K 31438 0 kqueue 13 20K 28K 166960K 118 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 72 0 69 1 0 1 1 0 8 0 rtentry 176 112 0 28 5 0 5 5 0 8 0 unpcb 144 343 0 325 4 3 1 4 0 8 0 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpcb 736 190 0 186 7 6 1 7 0 8 0 arp 136 13 0 3 1 0 1 1 0 8 0 inpcb 328 861 0 853 18 6 12 12 0 8 11 nd6 144 21 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 14 0 13 3 2 1 1 0 8 0 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 7 0 3 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfstitem 24 48 0 11 1 0 1 1 0 8 0 pfstkey 128 48 0 11 2 0 2 2 0 8 0 pfstate 384 48 0 11 5 0 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 489 0 126 30 3 27 30 0 8 1 art_table 40 490 0 126 5 0 5 5 0 8 0 art_node 32 111 0 36 1 0 1 1 0 8 0 sysvmsgpl 40 68 0 66 1 0 1 1 0 8 0 semapl 112 44 0 34 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2449 0 940 96 1 95 96 0 8 0 ffsino 296 2449 0 940 118 1 117 118 0 8 0 nchpl 144 3374 0 1685 64 0 64 64 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 uvmvnodes 80 2697 0 0 56 0 56 56 0 8 0 vnodes 216 2697 0 0 150 0 150 150 0 8 0 namei 1024 11463 0 11463 2 1 1 1 0 8 1 percpumem 16 66 0 17 1 0 1 1 0 8 0 kstatmem 264 50 0 24 3 1 2 3 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 13668 0 13668 13 9 4 8 1 8 4 plimitpl 152 127 0 108 1 0 1 1 0 8 0 sigapl 424 900 0 852 7 1 6 7 0 8 0 knotepl 120 567 0 0 18 0 18 18 0 8 0 kqueuepl 224 244 0 235 7 5 2 5 0 8 1 pipepl 344 141 0 114 3 0 3 3 0 8 0 fdescpl 528 881 0 850 3 0 3 3 0 8 0 filepl 160 5226 0 5003 20 3 17 17 0 8 5 lockfpl 104 239 0 236 1 0 1 1 0 8 0 lockfspl 48 106 0 103 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 43 0 26 1 0 1 1 0 8 0 ucredpl 104 717 0 703 1 0 1 1 0 8 0 zombiepl 144 855 0 852 1 0 1 1 0 8 0 processpl 1232 900 0 852 5 0 5 5 0 8 0 procpl 664 1655 0 1600 6 0 6 6 0 8 1 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 752 1290 0 1261 24 7 17 17 0 8 14 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 159 0 0 10 0 10 10 0 8 0 bufpl 280 6350 0 207 439 0 439 439 0 8 0 anonpl 32 10145 0 0 82 0 82 82 0 246 0 amapchunkpl 152 23379 0 22755 42 8 34 34 0 158 4 amappl16 200 3336 0 3129 25 14 11 17 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 115 0 103 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1522 0 1492 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 78 0 78 1 1 0 1 0 8 0 amappl9 144 278 0 277 1 0 1 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 114 0 102 1 0 1 1 0 8 0 amappl6 120 189 0 185 1 0 1 1 0 8 0 amappl5 112 122 0 112 1 0 1 1 0 8 0 amappl4 104 298 0 277 1 0 1 1 0 8 0 amappl3 96 3935 0 3841 3 0 3 3 0 8 0 amappl2 88 1128 0 1050 2 0 2 2 0 8 0 amappl1 80 10612 0 10007 15 0 15 15 0 8 0 amappl 88 6393 0 6223 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 882 0 851 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 882 0 851 1 0 1 1 0 8 0 vmmpekpl 168 8504 0 8468 2 0 2 2 0 8 0 vmmpepl 168 61870 0 59707 106 8 98 103 0 357 0 vmsppl 488 881 0 851 5 1 4 5 0 8 0 rwobjpl 80 21562 0 17743 79 0 79 79 0 8 0 pdppl 4096 1772 0 1702 102 30 72 86 0 8 2 pvpl 32 20938 0 0 170 1 169 169 0 265 0 pmappl 256 881 0 851 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 44 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ffs2_balloc(fffffd806bd69850,663bb,48,fffffd80097fb888,1,ffff80002a2f7f58) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a2f7fe0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805f3f3450,ffff80002a2f8090,3,fffffd80097fb888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffffd4c8,fffffd805f3f3450,fffffd80097fb888,ffff80002a2f8160,ffff80002a2f8140) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691 ktrsysret(ffff8000ffffd4c8,88,16,ffff80002a2f8230) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffd4c8,88,16,ffff80002a2f8230) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a2f82e0) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a2f82e0) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:767 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7334746dc570, count: -7 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 end of kernel end trace frame: 0x747d9c27db40, count: 12 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 end of kernel end trace frame: 0x747d9c27db40, count: -3