login: uvm_fault(0xffffffff839e5648, 0xffff80001c4a2189, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 247883 54053 0 0 0x4000001 1 syz-executor *468959 83712 -1 0x10 0x1 0K syz-executor memset() at memset+0x49 ffs_write(ffff80003339dfc0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806574fa40,ffff80003339e070,3,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800032f96020,fffffd806574fa40,fffffd80097fd340,ffff80003339e140,ffff80003339e120) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff800032f96020,53,28,ffff80003339e2d0) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff800032f96020,53,28,ffff80003339e2d0) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff80003339e2d0) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80003339e2d0) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ad03a254780, 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(0xffffffff839e5648, 0xffff80001c4a2189, 0, 2) -> d ddb{0}> trace memset() at memset+0x49 ffs_write(ffff80003339dfc0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806574fa40,ffff80003339e070,3,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800032f96020,fffffd806574fa40,fffffd80097fd340,ffff80003339e140,ffff80003339e120) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff800032f96020,53,28,ffff80003339e2d0) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff800032f96020,53,28,ffff80003339e2d0) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff80003339e2d0) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80003339e2d0) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ad03a254780, count: -7 ddb{0}> show registers rdi 0xffff80001c4a2189 rsi 0 rbp 0xffff80003339dee0 rbx 0x4189 __ALIGN_SIZE+0x3189 rdx 0x7 rcx 0x7 rax 0 r8 0x670 r9 0xffff80003339de40 r10 0xff74377c0306cd83 r11 0xffff80001c4a2189 r12 0x189 r13 0x800 r14 0xfffffd806574fa40 r15 0x1 rip 0xffffffff81795079 memset+0x49 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003339dcd8 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb{0}> show proc PROC (syz-executor) tid=468959 pid=83712 tcnt=3 stat=onproc flags process=10 proc=1 runpri=76, usrpri=76, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800032f96fb0,0xffff80002a221cb0 process=0xffff8000fffedcf8 user=0xffff800033399000, vmspace=0xfffffd806b35db90 estcpu=26, cpticks=12, pctcpu=0.0, user=10, sys=1, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19056 77176 17083 0 2 0 syz-executor 19056 280351 17083 0 2 0x4000000 syz-executor 10264 418847 89349 0 2 0 syz-executor 54053 113669 45826 0 2 0 syz-executor 54053 247883 45826 0 7 0x4000001 syz-executor 54053 451826 45826 0 3 0x4000080 fsleep syz-executor *83712 468959 69094 -1 7 0x11 syz-executor 83712 107267 69094 -1 3 0x4000090 sbwait syz-executor 83712 190890 69094 -1 3 0x4000090 fsleep syz-executor 70252 82619 0 0 3 0x14200 acct acct 24692 475703 1 0 3 0x100083 ttyin getty 31346 84352 72104 0 3 0x82 piperd syz-executor 69094 388525 72104 0 2 0xc82 syz-executor 21477 84138 72104 0 3 0x82 piperd syz-executor 45826 281778 72104 0 2 0xc82 syz-executor 20920 109031 72104 0 3 0x82 piperd syz-executor 17083 447351 72104 0 2 0x3 syz-executor 89349 443612 72104 0 3 0x82 nanoslp syz-executor 72104 145495 52909 0 3 0x82 nanoslp syz-executor 52909 92869 19242 0 3 0x10008a sigsusp ksh 19242 380561 84888 0 3 0x98 kqread sshd-session 84888 79755 37638 0 3 0x92 kqread sshd-session 37638 113088 1 0 3 0x88 kqread sshd 66313 510321 72655 74 3 0x1100092 bpf pflogd 72655 277257 1 0 3 0x80 sbwait pflogd 89734 377832 24543 73 3 0x1100090 kqread syslogd 24543 282968 1 0 3 0x100082 sbwait syslogd 38398 234381 1 0 3 0x100080 kqread resolvd 50564 396368 84115 77 3 0x100092 kqread dhcpleased 91913 239398 84115 77 3 0x100092 kqread dhcpleased 84115 360140 1 0 3 0x80 kqread dhcpleased 54546 71778 0 0 3 0x14200 bored smr 87412 200680 0 0 2 0x14200 zerothread 86665 311748 0 0 3 0x14200 aiodoned aiodoned 62106 269777 0 0 3 0x14200 syncer update 15159 453582 0 0 3 0x14200 cleaner cleaner 70434 112920 0 0 3 0x14200 reaper reaper 13599 512327 0 0 3 0x14200 pgdaemon pagedaemon 81352 312139 0 0 3 0x14200 bored viomb 85246 408886 0 0 3 0x40014200 acpi0 acpi0 85116 89827 0 0 3 0x40014200 idle1 28295 339681 0 0 3 0x14200 bored softnet1 42973 87996 0 0 3 0x14200 bored softnet0 26860 132479 0 0 3 0x14200 bored systqmp 45191 487968 0 0 3 0x14200 bored systq 83694 402194 0 0 3 0x14200 tmoslp softclockmp 55365 449827 0 0 3 0x40014200 tmoslp softclock 42877 223728 0 0 3 0x40014200 idle0 1 230341 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 83712 (syz-executor) thread 0xffff800032f96020 (468959) exclusive rrwlock inode r = 0 (0xfffffd8060d290d0) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:689 #7 ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] #7 ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 #8 syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] #8 syscall+0x305 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83aaab00) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] #1 ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 #2 syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] #2 syscall+0x305 sys/arch/amd64/amd64/trap.c:783 #3 Xsyscall+0x128 Process 83712 (syz-executor) thread 0xffff80002a221ca0 (107267) exclusive rwlock sbufrcv r = 0 (0xffff80000165ed10) #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 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 soreceive+0x27d sys/kern/uipc_socket.c:890 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11075 12156K 12656K 166960K 12457 0 pcb 17 14K 16K 166960K 168 0 rtable 156 4K 8K 166960K 444 0 pf 30 17K 22K 166960K 63 0 ifaddr 32 5K 7K 166960K 50 0 ifgroup 43 2K 2K 166960K 61 0 sysctl 3 1K 9K 166960K 10 0 counters 64 36K 37K 166960K 76 0 ioctlops 0 0K 4K 166960K 1556 0 iov 1 4K 16K 166960K 45 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1365 86K 86K 166960K 1793 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 45K 93K 166960K 433 0 sigio 0 0K 0K 166960K 2 0 proc 71 115K 147K 166960K 579 0 subproc 63 3K 5K 166960K 252 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 12 0 in_multi 69 4K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 157 705K 705K 166960K 157 0 exec 0 0K 1K 166960K 437 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 197 158K 176K 166960K 5430 0 UVM aobj 10 2K 2K 166960K 11 0 pinsyscall 38 76K 104K 166960K 1631 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 9 0K 2K 166960K 31 0 temp 40 9115K 9180K 166960K 7292 0 kqueue 15 24K 26K 166960K 65 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 120 109 0 106 2 1 1 2 0 8 0 rtentry 176 115 0 46 6 0 6 6 0 8 0 unpcb 144 205 0 186 4 3 1 4 0 8 0 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpcb 736 89 0 85 4 3 1 4 0 8 0 arp 136 18 0 6 1 0 1 1 0 8 0 inpcb 328 498 0 491 15 9 6 9 0 8 5 nd6 152 27 0 10 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 28 0 21 1 0 1 1 0 8 0 ppxss 1192 3 0 3 2 2 0 1 0 8 0 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 1 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 35 0 18 1 0 1 1 0 8 0 pfstkey 128 35 0 18 2 0 2 2 0 8 0 pfstate 448 35 0 18 4 0 4 4 0 8 0 pfrule 1360 26 0 20 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 516 0 188 30 6 24 30 0 8 0 art_table 40 517 0 188 5 0 5 5 0 8 0 art_node 32 115 0 53 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semapl 72 9 0 2 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2023 0 538 93 0 93 93 0 8 0 ffsino 296 2023 0 538 115 0 115 115 0 8 0 nchpl 144 2551 0 828 65 0 65 65 0 8 0 vnodes 216 2453 0 0 137 0 137 137 0 8 0 namei 1024 8672 0 8672 3 2 1 2 0 8 1 percpumem 16 53 0 6 1 0 1 1 0 8 0 kstatmem 264 33 0 12 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 8746 0 8746 11 10 1 8 1 8 1 plimitpl 152 81 0 65 1 0 1 1 0 8 0 sigapl 424 718 0 674 7 1 6 7 0 8 0 knotepl 120 315 0 0 10 0 10 10 0 8 0 kqueuepl 224 83 0 70 1 0 1 1 0 8 0 pipepl 344 204 0 177 3 0 3 3 0 8 0 fdescpl 528 701 0 674 3 0 3 3 0 8 0 filepl 160 3749 0 3539 19 7 12 15 0 8 2 lockfpl 104 103 0 100 1 0 1 1 0 8 0 lockfspl 48 44 0 41 1 0 1 1 0 8 0 sessionpl 144 51 0 42 1 0 1 1 0 8 0 pgrppl 48 80 0 64 1 0 1 1 0 8 0 ucredpl 104 387 0 373 1 0 1 1 0 8 0 zombiepl 144 763 0 763 2 1 1 1 0 8 1 processpl 1232 718 0 674 5 1 4 5 0 8 0 procpl 664 1143 0 1094 7 1 6 6 0 8 1 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 828 0 799 22 12 10 13 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 4459 0 0 279 0 279 279 0 8 0 bufpl 280 2830 0 105 195 0 195 195 0 8 0 anonpl 32 6979 0 0 57 0 57 57 0 246 0 amapchunkpl 152 16367 0 16003 36 3 33 33 0 158 16 amappl16 200 1963 0 1938 17 7 10 14 0 8 8 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 441 0 440 1 0 1 1 0 8 0 amappl13 176 133 0 121 1 0 1 1 0 8 0 amappl12 168 982 0 957 2 0 2 2 0 8 0 amappl11 160 6 0 5 1 0 1 1 0 8 0 amappl10 152 62 0 48 1 0 1 1 0 8 0 amappl9 144 280 0 280 1 1 0 1 0 8 0 amappl8 136 101 0 99 1 0 1 1 0 8 0 amappl7 128 154 0 141 1 0 1 1 0 8 0 amappl6 120 196 0 194 1 0 1 1 0 8 0 amappl5 112 225 0 215 1 0 1 1 0 8 0 amappl4 104 306 0 285 1 0 1 1 0 8 0 amappl3 96 3188 0 3100 4 0 4 4 0 8 0 amappl2 88 590 0 529 2 0 2 2 0 8 0 amappl1 80 12121 0 11545 15 2 13 15 0 8 0 amappl 88 4603 0 4478 4 0 4 4 0 92 0 uvmvnodes 80 107 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 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 10 0 1 1 0 1 1 0 8 0 uaddrrnd 24 701 0 674 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 701 0 674 1 0 1 1 0 8 0 vmmpekpl 168 8165 0 8122 3 0 3 3 0 8 0 vmmpepl 168 54249 0 52556 89 5 84 87 0 357 3 vmsppl 488 700 0 674 5 1 4 5 0 8 0 rwobjpl 80 18100 0 17116 25 0 25 25 0 8 1 pdppl 4096 1409 0 1348 103 34 69 85 0 8 8 pvpl 32 11457 0 0 94 1 93 93 0 265 0 pmappl 256 700 0 674 3 1 2 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 551 0 51 15 0 15 15 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace memset() at memset+0x49 ffs_write(ffff80003339dfc0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806574fa40,ffff80003339e070,3,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800032f96020,fffffd806574fa40,fffffd80097fd340,ffff80003339e140,ffff80003339e120) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff800032f96020,53,28,ffff80003339e2d0) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff800032f96020,53,28,ffff80003339e2d0) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff80003339e2d0) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80003339e2d0) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ad03a254780, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) 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 __mp_lock(ffffffff83aaa300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83aaa300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a220d10,36,0,ffff80003a7c1f10) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a220d10,36,0,ffff80003a7c1f10) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80003a7c1fc0) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003a7c1fc0) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x643864f1d40, count: 8 ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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 __mp_lock(ffffffff83aaa300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83aaa300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a220d10,36,0,ffff80003a7c1f10) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a220d10,36,0,ffff80003a7c1f10) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80003a7c1fc0) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003a7c1fc0) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x643864f1d40, count: -7