uvm_fault(0xffffffff8287ed30, 0xffff800020cef119, 0, 2) -> d kernel: page fault trap, code=0 Stopped at memset+0x45: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 264753 44369 0 0x2 0 0 syz-executor0355 *168314 6028 73 0x100010 0 1K syslogd memset() at memset+0x45 ffs_write(ffff800021223800) at ffs_write+0x932 sys/ufs/ffs/ffs_vnops.c:403 VOP_WRITE(fffffd806e786050,ffff800021223a20,3,fffffd807f7d7900) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:272 vn_write(fffffd806fc7c5f0,ffff800021223a20,0) at vn_write+0x151 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800021193a48,e,ffff800021223a20,0,ffff800021223b10) at dofilewritev+0x1a3 sys/kern/sys_generic.c:365 sys_writev(ffff800021193a48,ffff800021223ac0,ffff800021223b10) at sys_writev+0xa7 sys/kern/sys_generic.c:312 syscall(ffff800021223b90) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021223b90) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2510, 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(0xffffffff8287ed30, 0xffff800020cef119, 0, 2) -> d ddb{1}> trace memset() at memset+0x45 ffs_write(ffff800021223800) at ffs_write+0x932 sys/ufs/ffs/ffs_vnops.c:403 VOP_WRITE(fffffd806e786050,ffff800021223a20,3,fffffd807f7d7900) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:272 vn_write(fffffd806fc7c5f0,ffff800021223a20,0) at vn_write+0x151 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800021193a48,e,ffff800021223a20,0,ffff800021223b10) at dofilewritev+0x1a3 sys/kern/sys_generic.c:365 sys_writev(ffff800021193a48,ffff800021223ac0,ffff800021223b10) at sys_writev+0xa7 sys/kern/sys_generic.c:312 syscall(ffff800021223b90) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021223b90) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2510, count: -8 ddb{1}> show registers rdi 0xffff800020cef119 rsi 0 rbp 0xffff800021223720 rbx 0x1 rdx 0x7 rcx 0x7 rax 0 r8 0x3ee0 __ALIGN_SIZE+0x2ee0 r9 0xffff800021223678 r10 0x5f51cde1143be2cf r11 0xffff800020cef119 r12 0x38119 acpi_pdirpa+0x23f81 r13 0xfffffd806e61e878 r14 0x4000 __ALIGN_SIZE+0x3000 r15 0xfffffd806e61e878 rip 0xffffffff822dc6f5 memset+0x45 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021223528 ss 0x10 memset+0x45: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syslogd) pid=168314 stat=onproc flags process=100010 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000211937a8,0xffff8000ffff7d00 process=0xffff800021209500 user=0xffff80002121e000, vmspace=0xfffffd806eed2cf8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 6633 473037 44369 0 2 0 syz-executor0355 44369 264753 20919 0 7 0x2 syz-executor0355 20919 117355 29257 0 3 0x10008a sigsusp ksh 29257 441204 56099 0 3 0x9a select sshd 41462 227377 1 0 3 0x100083 ttyin getty 56099 252903 1 0 3 0x88 select sshd 59934 130005 21887 74 3 0x100092 bpf pflogd 21887 489575 1 0 3 0x80 netio pflogd * 6028 168314 12843 73 7 0x100010 syslogd 12843 222404 1 0 3 0x100082 netio syslogd 69765 197690 1 0 3 0x100080 kqread resolvd 47388 274250 73551 77 3 0x100092 kqread dhcpleased 74444 415724 73551 77 3 0x100092 kqread dhcpleased 73551 467172 1 0 3 0x80 kqread dhcpleased 4134 31330 0 0 3 0x14200 bored smr 8473 418198 0 0 3 0x14200 pgzero zerothread 12308 133722 0 0 3 0x14200 aiodoned aiodoned 87258 17750 0 0 3 0x14200 syncer update 26921 168823 0 0 3 0x14200 cleaner cleaner 19657 271753 0 0 3 0x14200 reaper reaper 71895 13281 0 0 3 0x14200 pgdaemon pagedaemon 22195 518732 0 0 3 0x14200 bored crynlk 9480 445725 0 0 3 0x14200 bored crypto 41086 97685 0 0 3 0x14200 bored viomb 58508 352324 0 0 3 0x40014200 acpi0 acpi0 49076 129259 0 0 3 0x40014200 idle1 98265 480171 0 0 3 0x14200 bored softnet 63528 498017 0 0 3 0x14200 bored systqmp 52164 147632 0 0 3 0x14200 bored systq 70067 194483 0 0 3 0x40014200 bored softclock 50001 379280 0 0 3 0x40014200 idle0 1 77179 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 44369 (syz-executor0355) thread 0xffff8000ffff7270 (264753) exclusive rwlock amaplk r = 0 (0xfffffd806d1b6e18) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvm_fault_check+0x3d2 sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:601 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806eed2020) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 Process 6028 (syslogd) thread 0xffff800021193a48 (168314) exclusive rrwlock inode r = 0 (0xfffffd806e61e810) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vn_write+0x11d sys/kern/vfs_vnops.c:411 #6 dofilewritev+0x1a3 sys/kern/sys_generic.c:365 #7 sys_writev+0xa7 sys/kern/sys_generic.c:312 #8 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828cdd58) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 vn_write+0x42 sys/kern/vfs_vnops.c:399 #2 dofilewritev+0x1a3 sys/kern/sys_generic.c:365 #3 sys_writev+0xa7 sys/kern/sys_generic.c:312 #4 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10113 6416K 6417K 78643K 11203 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 112 0 ifaddr 29 8K 8K 78643K 30 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 4K 78643K 1479 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 6 0 vnodes 1183 74K 75K 78643K 1189 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 1 0K 0K 78643K 1 0 proc 67 87K 87K 78643K 278 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 348 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 81 3K 6K 78643K 27216 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 23 4193K 4257K 78643K 3944 0 kqueue 9 12K 12K 78643K 9 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 17 0 14 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 35 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 2 0 1 0 8 0 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 304 32 0 26 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 pfstitem 24 9 0 7 2 1 1 1 0 8 0 pfstkey 112 9 0 7 2 1 1 1 0 8 0 pfstate 320 9 0 7 2 1 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1414 0 23 87 0 87 87 0 8 0 ffsino 272 1414 0 23 93 0 93 93 0 8 0 nchpl 144 1589 0 40 58 0 58 58 0 8 0 uvmvnodes 72 1425 0 0 26 0 26 26 0 8 0 vnodes 224 1425 0 0 84 0 84 84 0 8 0 namei 1024 10087 0 10087 2 1 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 216 7745 0 7745 14 13 1 8 0 8 1 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 2236 0 2204 4 0 4 4 0 8 0 futexpl 56 3519 0 3519 1 0 1 1 0 8 1 knotepl 112 24 0 0 1 0 1 1 0 8 0 kqueuepl 216 5 0 0 1 0 1 1 0 8 0 pipepl 336 69 0 66 2 1 1 1 0 8 0 fdescpl 496 2220 0 2204 3 0 3 3 0 8 0 filepl 152 7024 0 6966 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 70 0 57 1 0 1 1 0 8 0 zombiepl 144 2204 0 2204 2 1 1 1 0 8 1 processpl 1072 2236 0 2204 3 0 3 3 0 8 0 procpl 672 4216 0 4184 3 0 3 3 0 8 0 sockpl 480 84 0 60 5 1 4 4 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 57 0 0 8 0 8 8 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 111 0 0 7 0 7 7 0 8 0 bufpl 280 7978 0 1750 445 0 445 445 0 8 0 anonpl 24 580776 0 578471 19 3 16 17 0 186 2 amapchunkpl 152 55486 0 55342 9 2 7 8 0 158 1 amappl16 200 2074 0 2071 1 0 1 1 0 8 0 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl13 176 18 0 17 2 1 1 1 0 8 0 amappl12 168 14 0 14 1 1 0 1 0 8 0 amappl11 160 47 0 33 1 0 1 1 0 8 0 amappl10 152 29 0 25 1 0 1 1 0 8 0 amappl9 144 217 0 215 1 0 1 1 0 8 0 amappl8 136 2256 0 2255 2 1 1 1 0 8 0 amappl7 128 52 0 44 1 0 1 1 0 8 0 amappl6 120 86 0 81 1 0 1 1 0 8 0 amappl5 112 197 0 181 1 0 1 1 0 8 0 amappl4 104 528 0 507 1 0 1 1 0 8 0 amappl3 96 48 0 45 1 0 1 1 0 8 0 amappl2 88 2380 0 2334 3 1 2 2 0 8 0 amappl1 80 29140 0 28765 11 2 9 9 0 8 0 amappl 88 24992 0 24927 2 0 2 2 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2220 0 2204 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2220 0 2204 1 0 1 1 0 8 0 vmmpekpl 168 13928 0 13912 1 0 1 1 0 8 0 vmmpepl 168 143174 0 142316 44 4 40 41 0 357 0 vmsppl 368 2219 0 2204 2 0 2 2 0 8 0 rwobjpl 56 44183 0 43634 11 2 9 9 0 8 1 pdppl 4096 4448 0 4408 58 18 40 44 0 8 0 pvpl 32 754970 0 750757 45 8 37 38 0 265 2 pmappl 224 2219 0 2204 2 0 2 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 277 0 23 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827d7ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:353 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828cdb50) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828cdb50) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800021228f90) at syscall+0x42d mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800021228f90) at syscall+0x42d sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbd700, count: 9 ddb{0}> trace x86_ipi_db(ffffffff827d7ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:353 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828cdb50) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828cdb50) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800021228f90) at syscall+0x42d mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800021228f90) at syscall+0x42d sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbd700, count: -6 ddb{0}> machine ddbcpu 1 Stopped at memset+0x45: repe stosb %es:(%rdi) memset() at memset+0x45 ffs_write(ffff800021223800) at ffs_write+0x932 sys/ufs/ffs/ffs_vnops.c:403 VOP_WRITE(fffffd806e786050,ffff800021223a20,3,fffffd807f7d7900) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:272 vn_write(fffffd806fc7c5f0,ffff800021223a20,0) at vn_write+0x151 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800021193a48,e,ffff800021223a20,0,ffff800021223b10) at dofilewritev+0x1a3 sys/kern/sys_generic.c:365 sys_writev(ffff800021193a48,ffff800021223ac0,ffff800021223b10) at sys_writev+0xa7 sys/kern/sys_generic.c:312 syscall(ffff800021223b90) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021223b90) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2510, count: 7 ddb{1}> trace memset() at memset+0x45 ffs_write(ffff800021223800) at ffs_write+0x932 sys/ufs/ffs/ffs_vnops.c:403 VOP_WRITE(fffffd806e786050,ffff800021223a20,3,fffffd807f7d7900) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:272 vn_write(fffffd806fc7c5f0,ffff800021223a20,0) at vn_write+0x151 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800021193a48,e,ffff800021223a20,0,ffff800021223b10) at dofilewritev+0x1a3 sys/kern/sys_generic.c:365 sys_writev(ffff800021193a48,ffff800021223ac0,ffff800021223b10) at sys_writev+0xa7 sys/kern/sys_generic.c:312 syscall(ffff800021223b90) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021223b90) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2510, count: -8