login: uvm_fault(0xfffffd8008586cf0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi TID PID UID PRFLAGS PFLAGS CPU COMMAND *106416 42737 0 0 0x4000000 1K syz-executor1794 220797 42737 0 0 0x4000000 0 syz-executor1794 uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xcf2c95d32f0, count: 10 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(0xfffffd8008586cf0, 0x0, 0, 1) -> e ddb{1}> trace uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xcf2c95d32f0, count: -5 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800021226970 rbx 0 rdx 0x8b rcx 0x8 rax 0x1 r8 0xffffffff821e656e witness_assert+0x1fe r9 0x5 r10 0 r11 0x2a91698ae871a98c r12 0xffff800021226a80 r13 0xfffffd806ce2ee28 r14 0 r15 0xffffffff81d65300 uvn_flush+0x990 rip 0xffffffff81a60511 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000212268e0 ss 0 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{1}> show proc PROC (syz-executor1794) pid=106416 stat=onproc flags process=0 proc=4000000 pri=36, usrpri=60, nice=20 forw=0xffffffffffffffff, list=0xffff800021193268,0xffff800021192018 process=0xffff8000ffff14d8 user=0xffff800021221000, vmspace=0xfffffd8008586cf0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 42737 470227 10376 0 2 0 syz-executor1794 *42737 106416 10376 0 7 0x4000000 syz-executor1794 42737 220797 10376 0 7 0x4000000 syz-executor1794 10376 487437 22010 0 3 0x80 nanoslp syz-executor1794 4299 179263 22010 0 3 0 biowait syz-executor1794 22010 454061 7364 0 3 0x82 nanoslp syz-executor1794 7364 118175 12124 0 3 0x10008a sigsusp ksh 12124 180097 71517 0 3 0x9a kqread sshd 25827 162815 1 0 3 0x100083 ttyin getty 71517 120902 1 0 3 0x88 kqread sshd 81290 442237 89405 73 3 0x100090 kqread syslogd 89405 452524 1 0 3 0x100082 netio syslogd 84552 420772 1 0 3 0x100080 kqread resolvd 51577 181722 94030 77 3 0x100092 kqread dhcpleased 42850 505917 94030 77 3 0x100092 kqread dhcpleased 94030 223341 1 0 3 0x80 kqread dhcpleased 53352 508219 0 0 3 0x14200 bored smr 39814 161099 0 0 3 0x14200 pgzero zerothread 80651 408767 0 0 3 0x14200 aiodoned aiodoned 70713 418418 0 0 3 0x14200 syncer update 77735 478406 0 0 3 0x14200 cleaner cleaner 42854 347986 0 0 3 0x14200 reaper reaper 33906 138368 0 0 3 0x14200 pgdaemon pagedaemon 35717 19040 0 0 3 0x14200 bored viomb 44437 18484 0 0 3 0x40014200 acpi0 acpi0 56691 227144 0 0 3 0x40014200 idle1 72879 315427 0 0 3 0x14200 bored softnet 71717 411143 0 0 3 0x14200 bored systqmp 30984 523136 0 0 3 0x14200 bored systq 42838 96102 0 0 3 0x40014200 bored softclock 2289 283963 0 0 3 0x40014200 idle0 1 67459 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 42737 (syz-executor1794) thread 0xffff8000211922a8 (106416) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8286b6c8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 rw_enter+0x35b sys/kern/kern_rwlock.c:286 #5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801 #6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288 #7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640 #8 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #9 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #10 recall_trap+0x8 Process 42737 (syz-executor1794) thread 0xffff800021192008 (220797) exclusive rwlock amaplk r = 0 (0xfffffd806cf430c0) #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:776 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #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 (0xfffffd8008586d08) #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+0xe9 sys/uvm/uvm_fault.c:1745 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:676 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #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 4299 (syz-executor1794) thread 0xffff8000ffff6d30 (179263) exclusive rrwlock inode r = 0 (0xfffffd806d769b48) #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:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1c3 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3065 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d769d68) #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:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413 #6 namei+0x55a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3050 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10105 6348K 6379K 78643K 11195 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 108 0 ifaddr 24 7K 7K 78643K 24 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 2K 78643K 25 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1182 74K 74K 78643K 1187 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 5K 78643K 526 0 proc 55 74K 75K 78643K 222 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 31 148K 148K 78643K 31 0 exec 0 0K 2K 78643K 312 0 tdb 3 0K 0K 78643K 3 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 96 4K 5K 78643K 3933 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 3 0K 0K 78643K 3 0 temp 18 4181K 4245K 78643K 2072 0 kqueue 11 16K 16K 78643K 20 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 128 33 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 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 25 0 19 1 0 1 1 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 1759 0 372 87 0 87 87 0 8 0 ffsino 272 1759 0 372 93 0 93 93 0 8 0 nchpl 144 2284 0 740 59 1 58 58 0 8 0 uvmvnodes 80 1768 0 0 37 0 37 37 0 8 0 vnodes 224 1768 0 0 104 0 104 104 0 8 0 namei 1024 5793 0 5792 2 1 1 1 0 8 0 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 216 5250 0 5249 11 10 1 8 0 8 0 plimitpl 152 15 0 9 1 0 1 1 0 8 0 sigapl 424 404 0 374 4 0 4 4 0 8 0 futexpl 64 550 0 550 1 0 1 1 0 8 1 knotepl 112 36 0 0 2 0 2 2 0 8 0 kqueuepl 216 16 0 9 1 0 1 1 0 8 0 pipepl 336 62 0 59 2 1 1 1 0 8 0 fdescpl 496 390 0 374 3 0 3 3 0 8 0 filepl 152 1823 0 1769 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 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 589 0 579 1 0 1 1 0 8 0 zombiepl 144 374 0 374 2 1 1 1 0 8 1 processpl 1064 404 0 374 3 0 3 3 0 8 0 procpl 672 749 0 717 3 0 3 3 0 8 0 sockpl 480 75 0 53 3 0 3 3 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 89 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 148 0 0 8 0 8 8 0 8 0 bufpl 288 2111 0 87 145 0 145 145 0 8 0 anonpl 24 62216 0 59835 19 3 16 16 0 186 1 amapchunkpl 152 7666 0 7495 9 1 8 8 0 158 1 amappl16 200 203 0 201 2 1 1 1 0 8 0 amappl15 192 58 0 54 1 0 1 1 0 8 0 amappl13 176 16 0 15 2 1 1 1 0 8 0 amappl12 168 11 0 11 2 2 0 1 0 8 0 amappl11 160 63 0 51 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 225 0 223 1 0 1 1 0 8 0 amappl8 136 252 0 247 1 0 1 1 0 8 0 amappl7 128 29 0 28 1 0 1 1 0 8 0 amappl6 120 35 0 31 1 0 1 1 0 8 0 amappl5 112 209 0 195 1 0 1 1 0 8 0 amappl4 104 649 0 627 1 0 1 1 0 8 0 amappl3 96 319 0 305 1 0 1 1 0 8 0 amappl2 88 271 0 238 1 0 1 1 0 8 0 amappl1 80 9462 0 9091 12 3 9 9 0 8 0 amappl 88 3536 0 3459 3 0 3 3 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 24 390 0 374 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 390 0 374 1 0 1 1 0 8 0 vmmpekpl 168 6778 0 6763 1 0 1 1 0 8 0 vmmpepl 168 32711 0 31823 46 4 42 42 0 357 3 vmsppl 368 389 0 374 2 0 2 2 0 8 0 rwobjpl 56 11381 0 9084 34 1 33 33 0 8 0 pdppl 4096 788 0 748 66 24 42 46 0 8 2 pvpl 32 150680 0 146397 43 5 38 38 0 265 3 pmappl 248 389 0 374 2 0 2 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 431 0 28 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002122bd10,ffff80000006a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f __mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd8008586cf0,cf2b0c90000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff80002122c080,cf2b0c900f8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002122c080) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002122bd10,ffff80000006a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f __mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd8008586cf0,cf2b0c90000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff80002122c080,cf2b0c900f8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002122c080) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xcf2c95d32f0, count: 10 ddb{1}> trace uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xcf2c95d32f0, count: -5 ddb{1}>