uvm_fault(0xffffffff83630488, 0xffff80002784293b, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 307422 33497 0 0x2 0 0 syz-executor * 58926 99633 73 0x1100010 0 1K syslogd memset() at memset+0x49 ffs_write(ffff80002a06a060) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e265050,ffff80002a06a280,3,fffffd807f7d3af8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f89f098,ffff80002a06a280,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd960,e,ffff80002a06a280,0,ffff80002a06a340) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd960,ffff80002a06a3f0,ffff80002a06a340) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a06a3f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a3f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1f120bca00, count: 7 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff83630488, 0xffff80002784293b, 0, 2) -> d ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a06a060) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e265050,ffff80002a06a280,3,fffffd807f7d3af8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f89f098,ffff80002a06a280,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd960,e,ffff80002a06a280,0,ffff80002a06a340) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd960,ffff80002a06a3f0,ffff80002a06a340) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a06a3f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a3f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1f120bca00, count: -8 ddb{1}> show registers rdi 0xffff80002784293b rsi 0 rbp 0xffff80002a069f80 rbx 0x9093b acpi_pdirpa+0x7c7ac rdx 0x5 rcx 0x5 rax 0 r8 0x36c0 __ALIGN_SIZE+0x26c0 r9 0xffff80002a069ee0 r10 0xdf049f04158baf0f r11 0xffff80002784293b r12 0x4000 __ALIGN_SIZE+0x3000 r13 0x93b r14 0xfffffd806e265050 r15 0x1 rip 0xffffffff82b3ff19 memset+0x49 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a069d78 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syslogd) tid=58926 pid=99633 tcnt=1 stat=onproc flags process=1100010 proc=0 runpri=17, usrpri=52, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffd6d8,0xffff8000ffffcf50 process=0xffff8000ffffa450 user=0xffff80002a065000, vmspace=0xfffffd806f0e96e8 estcpu=2, cpticks=1, pctcpu=7.11, user=2, sys=1218, intr=355 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93064 169989 38374 0 2 0 syz-executor 93064 46923 38374 0 2 0x4000000 syz-executor 60159 277698 1027 0 2 0 syz-executor 60159 222353 1027 0 3 0x4000080 fsleep syz-executor 96015 192425 96423 0 2 0 syz-executor 96015 335457 96423 0 3 0x4000080 fsleep syz-executor 76414 367411 87797 0 2 0 syz-executor 76414 430238 87797 0 2 0x4000000 syz-executor 76414 391633 87797 0 3 0x4000080 fsleep syz-executor 76414 189376 87797 0 3 0x4000080 fsleep syz-executor 71467 360633 33497 0 2 0 syz-executor 71467 307073 33497 0 2 0x4000000 syz-executor 90279 7224 16565 0 2 0x480 syz-executor 90279 230681 16565 0 3 0x4000080 bell syz-executor 90279 13650 16565 0 3 0x4000080 fsleep syz-executor 72365 61996 0 0 3 0x14200 acct acct 16565 116734 88923 0 2 0x482 syz-executor 38374 311789 88923 0 2 0x482 syz-executor 33497 307422 88923 0 7 0x2 syz-executor 58616 444526 88923 0 3 0x82 piperd syz-executor 1027 399443 88923 0 2 0x482 syz-executor 87797 355740 88923 0 2 0x482 syz-executor 96423 177274 88923 0 2 0x482 syz-executor 61038 437861 88923 0 3 0x82 piperd syz-executor 56507 388255 1 0 3 0x100083 ttyin getty 24366 383648 0 0 3 0x14200 bored sosplice 88923 236191 81139 0 2 0x2 syz-executor 81139 74732 10645 0 3 0x10008a sigsusp ksh 10645 96162 87435 0 3 0x98 kqread sshd-session 87435 68320 84691 0 3 0x92 kqread sshd-session 84691 352548 1 0 3 0x88 kqread sshd 35541 56509 21960 74 3 0x1100092 bpf pflogd 21960 285953 1 0 3 0x80 sbwait pflogd *99633 58926 58038 73 7 0x1100010 syslogd 58038 470398 1 0 3 0x100082 sbwait syslogd 30268 212198 1 0 3 0x100080 kqread resolvd 24961 154585 19237 77 3 0x100092 kqread dhcpleased 55506 490412 19237 77 3 0x100092 kqread dhcpleased 19237 62314 1 0 3 0x80 kqread dhcpleased 16113 421166 0 0 2 0x14200 smr 2199 277244 0 0 2 0x14200 zerothread 68416 350514 0 0 3 0x14200 aiodoned aiodoned 27203 499472 0 0 3 0x14200 syncer update 17294 67203 0 0 3 0x14200 cleaner cleaner 99653 113151 0 0 3 0x14200 reaper reaper 87855 83226 0 0 3 0x14200 pgdaemon pagedaemon 26287 435241 0 0 3 0x14200 bored viomb 86125 362768 0 0 3 0x40014200 acpi0 acpi0 16693 411511 0 0 3 0x40014200 idle1 66403 254184 0 0 3 0x14200 bored softnet3 80666 117271 0 0 3 0x14200 bored softnet2 37827 501309 0 0 3 0x14200 bored softnet1 4626 379208 0 0 3 0x14200 bored softnet0 59541 397612 0 0 3 0x14200 bored systqmp 62760 121371 0 0 3 0x14200 bored systq 47564 32946 0 0 3 0x14200 tmoslp softclockmp 39394 419150 0 0 3 0x40014200 tmoslp softclock 91014 190707 0 0 3 0x40014200 idle0 1 114740 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 99633 (syslogd) thread 0xffff8000ffffd960 (58926) exclusive rrwlock inode r = 0 (0xfffffd806e4a55f0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_writev+0xd8 sys/kern/sys_generic.c:327 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836156f0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 vn_write+0x4e sys/kern/vfs_vnops.c:393 #2 dofilewritev+0x23c sys/kern/sys_generic.c:380 #3 sys_writev+0xd8 sys/kern/sys_generic.c:327 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10347 10312K 10563K 166960K 12273 0 pcb 51 14K 14K 166960K 135 0 rtable 217 6K 7K 166960K 1148 0 pf 35 17K 19K 166960K 122 0 ifaddr 42 7K 8K 166960K 152 0 ifgroup 55 2K 2K 166960K 177 0 sysctl 2 1K 1K 166960K 2 0 counters 64 36K 36K 166960K 124 0 ioctlops 0 0K 4K 166960K 1619 0 iov 0 0K 44K 166960K 99 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1455 91K 92K 166960K 2200 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 25 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 89K 166960K 1024 0 sigio 0 0K 0K 166960K 19 0 proc 70 91K 140K 166960K 1266 0 subproc 104 6K 6K 166960K 416 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 63 0 in_multi 96 7K 7K 166960K 382 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 770 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 227 72K 87K 166960K 9563 0 UVM aobj 13 2K 4K 166960K 16 0 pinsyscall 41 82K 103K 166960K 2735 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 28 0 NDP 12 0K 2K 166960K 106 0 temp 78 6824K 6892K 166960K 38119 0 kqueue 13 20K 30K 166960K 93 0 SYN cache 2 8K 16K 166960K 3 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 123 0 120 1 0 1 1 0 8 0 rtentry 112 399 0 299 4 0 4 4 0 8 0 unpcb 144 644 0 626 9 7 2 6 0 8 1 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 808 229 0 225 10 9 1 7 0 8 0 arp 120 69 0 51 1 0 1 1 0 8 0 inpcb 336 937 0 893 17 12 5 7 0 8 1 nd6 136 111 0 84 2 0 2 2 0 8 1 pkpcb 40 7 0 7 4 3 1 1 0 8 1 kcovpl 48 32 0 24 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 1 0 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 1 1 1 0 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 68 0 47 1 0 1 1 0 8 0 pfstkey 128 68 0 47 2 0 2 2 0 8 0 pfstate 376 67 0 47 5 0 5 5 0 8 0 pfrule 1344 28 0 21 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1563 0 1143 32 3 29 29 0 8 1 art_table 32 1564 0 1143 4 0 4 4 0 8 0 art_node 16 398 0 308 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 13 0 3 1 0 1 1 0 8 0 dirhash 1024 26 0 9 3 0 3 3 0 8 0 dino2pl 256 2571 0 1020 98 0 98 98 0 8 0 ffsino 272 2571 0 1020 104 0 104 104 0 8 0 nchpl 144 3568 0 1854 64 0 64 64 0 8 0 uvmvnodes 80 3334 0 0 69 0 69 69 0 8 0 vnodes 216 3334 0 0 186 0 186 186 0 8 0 namei 1024 13826 0 13826 5 4 1 2 0 8 1 percpumem 16 76 0 30 1 0 1 1 0 8 0 kstatmem 264 84 0 60 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 23762 0 23762 14 11 3 8 1 8 3 plimitpl 152 124 0 106 1 0 1 1 0 8 0 sigapl 424 1282 0 1232 9 2 7 7 0 8 0 futexpl 64 8109 0 8104 4 3 1 1 0 8 0 knotepl 120 600 0 0 18 0 18 18 0 8 0 kqueuepl 216 306 0 297 11 10 1 5 0 8 0 pipepl 320 284 0 257 3 0 3 3 0 8 0 fdescpl 496 1261 0 1231 6 1 5 5 0 8 0 filepl 152 6817 0 6526 27 14 13 18 0 8 0 lockfpl 104 194 0 190 1 0 1 1 0 8 0 lockfspl 48 84 0 80 1 0 1 1 0 8 0 sessionpl 144 48 0 39 1 0 1 1 0 8 0 pgrppl 48 84 0 67 1 0 1 1 0 8 0 ucredpl 104 723 0 709 1 0 1 1 0 8 0 zombiepl 144 1232 0 1232 1 0 1 1 0 8 1 processpl 1160 1282 0 1232 5 1 4 5 0 8 0 procpl 648 2213 0 2154 7 1 6 6 0 8 0 srpgc 96 4 0 4 1 1 0 1 0 8 0 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 664 1721 0 1657 38 32 6 20 0 8 0 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 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 216 0 0 27 0 27 27 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 329 0 0 19 0 19 19 0 8 0 bufpl 280 7976 0 1804 441 0 441 441 0 8 0 anonpl 24 166166 0 162748 77 13 64 77 0 185 33 amapchunkpl 152 30027 0 29561 39 6 33 35 0 158 11 amappl16 200 2064 0 2041 22 19 3 14 0 8 1 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 160 0 148 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 2328 0 2298 4 2 2 3 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 215 0 215 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 154 0 140 1 0 1 1 0 8 0 amappl6 120 402 0 400 1 0 1 1 0 8 0 amappl5 112 225 0 213 1 0 1 1 0 8 0 amappl4 104 396 0 378 1 0 1 1 0 8 0 amappl3 96 5279 0 5186 3 0 3 3 0 8 0 amappl2 88 1511 0 1433 2 0 2 2 0 8 0 amappl1 80 11935 0 11353 17 3 14 15 0 8 1 amappl 88 8987 0 8823 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 15 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1261 0 1231 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1261 0 1231 1 0 1 1 0 8 0 vmmpekpl 168 12195 0 12151 3 0 3 3 0 8 0 vmmpepl 168 80395 0 78561 102 16 86 96 0 357 0 vmsppl 440 1260 0 1231 6 2 4 5 0 8 0 rwobjpl 56 26393 0 22115 63 2 61 61 0 8 0 pdppl 4096 2529 0 2462 124 53 71 83 0 8 4 pvpl 32 32006 0 0 259 1 258 258 0 265 0 pmappl 248 1260 0 1231 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 450 0 85 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834adff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff836154e8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836154e8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002a0de0f0) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0de0f0) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77f8d9fb68f0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff834adff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff836154e8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836154e8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002a0de0f0) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0de0f0) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77f8d9fb68f0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at memset+0x49: repe stosb %es:(%rdi) memset() at memset+0x49 ffs_write(ffff80002a06a060) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e265050,ffff80002a06a280,3,fffffd807f7d3af8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f89f098,ffff80002a06a280,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd960,e,ffff80002a06a280,0,ffff80002a06a340) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd960,ffff80002a06a3f0,ffff80002a06a340) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a06a3f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a3f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1f120bca00, count: 7 ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a06a060) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e265050,ffff80002a06a280,3,fffffd807f7d3af8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f89f098,ffff80002a06a280,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd960,e,ffff80002a06a280,0,ffff80002a06a340) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd960,ffff80002a06a3f0,ffff80002a06a340) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a06a3f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a3f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1f120bca00, count: -8