login: uvm_fault(0xfffffd807efff000, 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 *511112 85564 32767 0x10 0 0K syz-executor.1 36884 85564 32767 0x10 0x4000000 1 syz-executor.1 uvm_fault_lower(ffff8000246a8050,ffff8000246a8088,ffff8000246a7fd0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff000,20001000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff8000246a81c0,20001100) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246a81c0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7fffff52e0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd807efff000, 0x0, 0, 1) -> e ddb{0}> trace uvm_fault_lower(ffff8000246a8050,ffff8000246a8088,ffff8000246a7fd0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff000,20001000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff8000246a81c0,20001100) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246a81c0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7fffff52e0, count: -5 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000246a7f40 rbx 0 rdx 0 rcx 0x8 rax 0xffff800021270548 r8 0xffffffff81a8edde witness_assert+0x1fe r9 0x5 r10 0xb5acc70e6843d26f r11 0x3ce4414159cb666d r12 0xffff8000246a8050 r13 0xfffffd806f87b5a0 r14 0 r15 0xffffffff81b25d00 uvn_flush+0x950 rip 0xffffffff817b9101 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000246a7eb0 ss 0 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{0}> show proc PROC (syz-executor.1) pid=511112 stat=onproc flags process=10 proc=0 pri=36, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212707e8,0xffff800021271518 process=0xffff8000ffff98f8 user=0xffff8000246a3000, vmspace=0xfffffd807efff000 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *85564 511112 14050 32767 7 0x10 syz-executor.1 85564 15589 14050 32767 3 0x4000090 fsleep syz-executor.1 85564 310312 14050 32767 3 0x4000090 fsleep syz-executor.1 85564 36884 14050 32767 7 0x4000010 syz-executor.1 54923 433805 12312 32767 2 0x490 syz-executor.0 54923 94694 12312 32767 3 0x4000090 fsleep syz-executor.0 54923 511209 12312 32767 3 0x4000090 fsleep syz-executor.0 14050 236798 13051 32767 3 0x90 nanoslp syz-executor.1 13051 302600 89260 0 3 0x82 wait syz-executor.1 12418 431233 0 0 3 0x14200 bored sosplice 12312 301695 54456 32767 3 0x90 nanoslp syz-executor.0 54456 341480 89260 0 3 0x82 wait syz-executor.0 89260 172338 61328 0 3 0x82 thrsleep syz-fuzzer 89260 162081 61328 0 3 0x4000082 nanoslp syz-fuzzer 89260 267806 61328 0 3 0x4000082 thrsleep syz-fuzzer 89260 80252 61328 0 3 0x4000082 kqread syz-fuzzer 89260 209834 61328 0 3 0x4000082 thrsleep syz-fuzzer 89260 307852 61328 0 3 0x4000082 thrsleep syz-fuzzer 89260 242641 61328 0 3 0x4000082 thrsleep syz-fuzzer 89260 122060 61328 0 2 0x4000482 syz-fuzzer 61328 496250 35088 0 3 0x10008a sigsusp ksh 35088 523281 71915 0 3 0x9a kqread sshd 37651 142670 1 0 3 0x100083 ttyin getty 71915 35473 1 0 3 0x88 kqread sshd 60662 233142 79965 73 3 0x100090 kqread syslogd 79965 425770 1 0 3 0x100082 netio syslogd 34068 32376 1 0 3 0x100080 kqread resolvd 15409 524246 76535 77 3 0x100092 kqread dhcpleased 10636 401545 76535 77 3 0x100092 kqread dhcpleased 76535 472912 1 0 3 0x80 kqread dhcpleased 37191 381548 0 0 3 0x14200 bored smr 77387 469252 0 0 3 0x14200 pgzero zerothread 16487 273425 0 0 3 0x14200 aiodoned aiodoned 66985 99760 0 0 3 0x14200 syncer update 37650 380250 0 0 3 0x14200 cleaner cleaner 21622 241792 0 0 3 0x14200 reaper reaper 73163 79019 0 0 3 0x14200 pgdaemon pagedaemon 56891 82380 0 0 3 0x14200 bored viomb 10237 491290 0 0 3 0x40014200 acpi0 acpi0 49701 424438 0 0 3 0x40014200 idle1 19965 12510 0 0 3 0x14200 bored softnet 83248 509619 0 0 3 0x14200 bored systqmp 29843 233497 0 0 3 0x14200 bored systq 97793 381950 0 0 3 0x40014200 bored softclock 96657 42386 0 0 3 0x40014200 idle0 1 192487 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 85564 (syz-executor.1) thread 0xffff800021270548 (511112) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b70b8) #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 85564 (syz-executor.1) thread 0xffff800021271268 (36884) exclusive rwlock amaplk r = 0 (0xfffffd80675e6e10) #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 (0xfffffd807efff018) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10121 6390K 6416K 78643K 11217 0 pcb 13 8K 8K 78643K 13 0 rtable 106 3K 3K 78643K 238 0 ifaddr 39 10K 10K 78643K 53 0 counters 44 34K 34K 78643K 48 0 ioctlops 0 0K 2K 78643K 96 0 iov 0 0K 12K 78643K 10 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1208 76K 76K 78643K 1245 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 53 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 33K 78643K 240 0 proc 56 74K 99K 78643K 345 0 subproc 26 1K 1K 78643K 52 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 12 0 in_multi 33 2K 2K 78643K 64 0 ether_multi 1 0K 0K 78643K 7 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 2K 78643K 420 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 211 26K 26K 78643K 4333 0 UVM aobj 41 2K 2K 78643K 41 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2 0 NDP 5 0K 0K 78643K 15 0 temp 51 4185K 4249K 78643K 2711 0 kqueue 12 18K 20K 78643K 30 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 36 0 31 1 0 1 1 0 8 0 rtentry 112 67 0 23 2 0 2 2 0 8 0 unpcb 128 1155 0 1142 7 1 6 7 0 8 5 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 79 0 79 1 1 0 1 0 8 0 tcpcb 736 101 0 93 7 3 4 7 0 8 3 arp 120 10 0 4 1 0 1 1 0 8 0 inpcb 304 642 0 634 6 0 6 6 0 8 5 nd6 48 12 0 6 1 0 1 1 0 8 0 kcovpl 48 4 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 277 0 88 12 0 12 12 0 8 0 art_table 32 278 0 88 2 0 2 2 0 8 0 art_node 16 66 0 26 1 0 1 1 0 8 0 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 38 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1634 0 230 88 0 88 88 0 8 0 ffsino 272 1634 0 230 94 0 94 94 0 8 0 nchpl 144 2094 0 493 60 0 60 60 0 8 0 uvmvnodes 80 1695 0 0 35 0 35 35 0 8 0 vnodes 224 1695 0 0 100 0 100 100 0 8 0 namei 1024 5919 0 5919 1 0 1 1 0 8 1 percpumem 16 36 0 2 1 0 1 1 0 8 0 scxspl 216 6113 0 6113 9 2 7 8 0 8 7 plimitpl 152 36 0 26 1 0 1 1 0 8 0 sigapl 424 456 0 422 4 0 4 4 0 8 0 futexpl 64 1374 0 1370 1 0 1 1 0 8 0 knotepl 112 65 0 0 3 1 2 3 0 8 0 kqueuepl 216 179 0 171 5 0 5 5 0 8 4 pipepl 336 95 0 85 2 0 2 2 0 8 1 fdescpl 496 441 0 422 3 0 3 3 0 8 0 filepl 152 3408 0 3303 17 5 12 15 0 8 7 lockfpl 104 15 0 12 1 0 1 1 0 8 0 lockfspl 48 9 0 6 1 0 1 1 0 8 0 sessionpl 144 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 178 0 166 1 0 1 1 0 8 0 zombiepl 144 422 0 422 1 0 1 1 0 8 1 processpl 1064 456 0 422 3 0 3 3 0 8 0 procpl 672 873 0 827 5 0 5 5 0 8 0 sosppl 168 7 0 7 1 0 1 1 0 8 1 sockpl 480 1833 0 1807 70 59 11 34 0 8 7 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 171 0 0 21 0 21 21 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 230 0 0 14 0 14 14 0 8 0 bufpl 288 3566 0 155 244 0 244 244 0 8 0 anonpl 24 96815 0 85007 73 1 72 72 0 186 0 amapchunkpl 152 10313 0 9713 25 1 24 24 0 158 0 amappl16 200 794 0 497 16 0 16 16 0 8 0 amappl15 192 72 0 67 1 0 1 1 0 8 0 amappl14 184 2 0 2 2 2 0 1 0 8 0 amappl13 176 42 0 41 1 0 1 1 0 8 0 amappl12 168 109 0 104 1 0 1 1 0 8 0 amappl11 160 65 0 51 1 0 1 1 0 8 0 amappl10 152 63 0 57 1 0 1 1 0 8 0 amappl9 144 293 0 289 1 0 1 1 0 8 0 amappl8 136 349 0 318 2 0 2 2 0 8 0 amappl7 128 60 0 51 1 0 1 1 0 8 0 amappl6 120 95 0 86 1 0 1 1 0 8 0 amappl5 112 418 0 395 1 0 1 1 0 8 0 amappl4 104 554 0 531 1 0 1 1 0 8 0 amappl3 96 280 0 261 1 0 1 1 0 8 0 amappl2 88 550 0 506 2 0 2 2 0 8 0 amappl1 80 10684 0 10230 12 2 10 12 0 8 0 amappl 88 4019 0 3857 4 0 4 4 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 40 0 0 1 0 1 1 0 8 0 uaddrrnd 24 441 0 422 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 441 0 422 1 0 1 1 0 8 0 vmmpekpl 168 7746 0 7727 2 0 2 2 0 8 0 vmmpepl 168 43344 0 41700 80 0 80 80 0 357 8 vmsppl 368 440 0 422 2 0 2 2 0 8 0 rwobjpl 56 13431 0 10660 41 1 40 40 0 8 0 pdppl 4096 890 0 844 64 18 46 50 0 8 0 pvpl 32 248499 0 233106 133 8 125 131 0 265 0 pmappl 248 440 0 422 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 560 0 23 16 0 16 16 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace uvm_fault_lower(ffff8000246a8050,ffff8000246a8088,ffff8000246a7fd0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff000,20001000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff8000246a81c0,20001100) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246a81c0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7fffff52e0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) 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(ffffffff828b6eb0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 uvm_fault(fffffd807efff000,b819ec7c000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff8000246c8110,b819ec7c898) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246c8110) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: 7 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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(ffffffff828b6eb0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 uvm_fault(fffffd807efff000,b819ec7c000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff8000246c8110,b819ec7c898) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246c8110) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -8