uvm_fault(0xfffffd807efffa10, 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 * 99489 95886 32767 0x10 0 1K syz-executor.0 292714 95886 32767 0x10 0x4000000 0 syz-executor.0 uvm_fault_lower(ffff8000246e31d0,ffff8000246e3208,ffff8000246e3150,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffa10,20002000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff8000246e3340,20002000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246e3340) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffcebc0, 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(0xfffffd807efffa10, 0x0, 0, 1) -> e ddb{1}> trace uvm_fault_lower(ffff8000246e31d0,ffff8000246e3208,ffff8000246e3150,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffa10,20002000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff8000246e3340,20002000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246e3340) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffcebc0, count: -5 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000246e30c0 rbx 0 rdx 0 rcx 0 rax 0xffff80002125ad20 r8 0xffffffff81a8edde witness_assert+0x1fe r9 0x5 r10 0xfc4e82380ed030d3 r11 0xf2654f434757e427 r12 0xffff8000246e31d0 r13 0xfffffd806f971300 r14 0 r15 0xffffffff81b25d00 uvn_flush+0x950 rip 0xffffffff817b9101 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000246e3030 ss 0 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{1}> show proc PROC (syz-executor.0) pid=99489 stat=onproc flags process=10 proc=0 pri=36, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002125b7a0,0xffff80002125a550 process=0xffff80002125cc90 user=0xffff8000246de000, vmspace=0xfffffd807efffa10 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *95886 99489 21596 32767 7 0x10 syz-executor.0 95886 365050 21596 32767 3 0x4000090 fsleep syz-executor.0 95886 389164 21596 32767 2 0x4000010 syz-executor.0 95886 292714 21596 32767 7 0x4000010 syz-executor.0 44927 277016 17655 32767 3 0x10 biowait syz-executor.1 17655 291610 57680 0 3 0x82 wait syz-executor.1 21596 127307 96813 32767 3 0x90 nanoslp syz-executor.0 96813 416363 57680 0 3 0x82 wait syz-executor.0 42103 477024 0 0 3 0x14200 bored sosplice 57680 226102 51165 0 3 0x82 thrsleep syz-fuzzer 57680 54670 51165 0 3 0x4000082 nanoslp syz-fuzzer 57680 291244 51165 0 3 0x4000082 thrsleep syz-fuzzer 57680 292384 51165 0 3 0x4000082 thrsleep syz-fuzzer 57680 145598 51165 0 3 0x4000082 thrsleep syz-fuzzer 57680 84099 51165 0 3 0x4000082 thrsleep syz-fuzzer 57680 269601 51165 0 3 0x4000082 thrsleep syz-fuzzer 57680 39646 51165 0 3 0x4000082 kqread syz-fuzzer 51165 208987 26413 0 3 0x10008a sigsusp ksh 26413 270590 38175 0 3 0x9a kqread sshd 54233 46066 1 0 3 0x100083 ttyin getty 38175 52476 1 0 3 0x88 kqread sshd 96532 229401 92383 73 3 0x100090 kqread syslogd 92383 447391 1 0 3 0x100082 netio syslogd 65992 490515 1 0 3 0x100080 kqread resolvd 22617 376417 9638 77 3 0x100092 kqread dhcpleased 43338 195834 9638 77 3 0x100092 kqread dhcpleased 9638 270882 1 0 3 0x80 kqread dhcpleased 52156 374221 0 0 3 0x14200 bored smr 43067 368846 0 0 2 0x14200 zerothread 16353 302797 0 0 3 0x14200 aiodoned aiodoned 41047 129604 0 0 3 0x14200 syncer update 72715 512146 0 0 3 0x14200 cleaner cleaner 81145 418145 0 0 3 0x14200 reaper reaper 18127 388244 0 0 3 0x14200 pgdaemon pagedaemon 26848 282217 0 0 3 0x14200 bored viomb 5355 174620 0 0 3 0x40014200 acpi0 acpi0 48668 329724 0 0 3 0x40014200 idle1 24245 82125 0 0 3 0x14200 bored softnet 16470 70983 0 0 3 0x14200 bored systqmp 9939 61977 0 0 3 0x14200 bored systq 5963 212824 0 0 3 0x40014200 bored softclock 12124 444354 0 0 3 0x40014200 idle0 1 147343 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 95886 (syz-executor.0) thread 0xffff80002125ad20 (99489) 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 44927 (syz-executor.1) thread 0xffff80002125b7a0 (277016) exclusive rrwlock inode r = 0 (0xfffffd8064ae5e70) #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 (0xfffffd8064ae5d60) #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 10160 6395K 6416K 78643K 11387 0 pcb 13 12K 14K 78643K 17 0 rtable 114 3K 4K 78643K 4560 0 ifaddr 39 10K 10K 78643K 357 0 sysctl 3 1K 5K 78643K 38 0 counters 44 34K 34K 78643K 134 0 ioctlops 0 0K 2K 78643K 666 0 iov 0 0K 32K 78643K 4537 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1209 76K 76K 78643K 9472 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 386 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 11394 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 33K 78643K 44209 0 sigio 0 0K 0K 78643K 621 0 proc 56 74K 99K 78643K 3910 0 subproc 26 1K 1K 78643K 611 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 4289 0 in_multi 33 2K 2K 78643K 1094 0 ether_multi 1 0K 0K 78643K 256 0 mrt 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 277 1235K 1235K 78643K 277 0 exec 0 0K 2K 78643K 7759 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 332 39K 55K 78643K 586657 0 UVM aobj 131 4K 5K 78643K 142 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1298 0 NDP 5 0K 0K 78643K 144 0 temp 76 4195K 4323K 78643K 104222 0 kqueue 18 30K 42K 78643K 3443 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 42109 0 42106 265 262 3 6 0 8 2 rtentry 112 608 0 560 2 0 2 2 0 8 0 unpcb 128 49173 0 49160 395 392 3 9 0 8 2 syncache 296 370 0 370 94 94 0 1 0 8 0 tcpqe 32 112 0 112 43 43 0 1 0 8 0 tcpcb 736 16390 0 16382 582 575 7 42 0 8 6 arp 120 111 0 104 1 0 1 1 0 8 0 ipq 40 73 0 72 28 27 1 1 0 8 0 ipqe 40 918 0 917 28 27 1 1 0 8 0 inpcb 304 41282 0 41269 654 648 6 16 0 8 5 rttmr 72 71 0 71 2 2 0 1 0 8 0 ip6q 72 163 0 162 25 24 1 1 0 8 0 ip6af 40 308 0 307 25 24 1 1 0 8 0 nd6 48 192 0 183 1 0 1 1 0 8 0 kcovpl 48 47 0 45 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2645 0 2442 32 19 13 17 0 8 0 art_table 32 2646 0 2442 4 2 2 3 0 8 0 art_node 16 607 0 563 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 0 1 0 1 1 0 8 0 semapl 112 11388 0 11378 1 0 1 1 0 8 0 shmpl 112 139 0 11 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 59452 0 57969 96 2 94 94 0 8 0 ffsino 272 59452 0 57969 101 1 100 100 0 8 0 nchpl 144 116888 0 115287 60 0 60 60 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 390384 0 390383 24 23 1 2 0 8 0 percpumem 16 79 0 45 1 0 1 1 0 8 0 scxspl 216 376383 0 376382 140 139 1 8 0 8 0 plimitpl 152 9346 0 9336 1 0 1 1 0 8 0 sigapl 424 44296 0 44263 4 0 4 4 0 8 0 futexpl 64 318779 0 318778 21 20 1 1 0 8 0 knotepl 112 571 0 0 4 0 4 4 0 8 0 kqueuepl 216 17995 0 17959 323 317 6 11 0 8 4 pipepl 336 11235 0 11225 389 382 7 11 0 8 6 fdescpl 496 44281 0 44263 4 1 3 3 0 8 0 filepl 152 342225 0 342121 657 648 9 19 0 8 4 lockfpl 104 5968 0 5965 2 1 1 2 0 8 0 lockfspl 48 1806 0 1803 1 0 1 1 0 8 0 sessionpl 144 62 0 52 1 0 1 1 0 8 0 pgrppl 48 866 0 856 1 0 1 1 0 8 0 ucredpl 96 51499 0 51487 1 0 1 1 0 8 0 zombiepl 144 44263 0 44263 2 1 1 1 0 8 1 processpl 1064 44296 0 44263 4 1 3 3 0 8 0 procpl 672 140622 0 140579 74 69 5 6 0 8 1 srpgc 96 1 0 1 1 1 0 1 0 8 0 sosppl 168 617 0 617 90 89 1 1 0 8 1 sockpl 480 134847 0 134821 2622 2610 12 41 0 8 8 mcl64k 65536 121 0 0 6 3 3 3 0 8 0 mcl16k 16384 97 0 0 10 7 3 3 0 8 0 mcl12k 12288 121 0 0 5 3 2 5 0 8 0 mcl9k 9216 83 0 0 3 1 2 2 0 8 0 mcl8k 8192 117 0 0 12 7 5 10 0 8 0 mcl4k 4096 72 0 0 4 2 2 3 0 8 0 mcl2k2 2112 108 0 0 7 5 2 7 0 8 0 mcl2k 2048 654 0 0 23 13 10 18 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 4096 0 0 228 1 227 228 0 8 0 bufpl 288 89000 0 82675 455 2 453 453 0 8 0 anonpl 24 13483347 0 13470509 808 708 100 129 0 186 3 amapchunkpl 152 1497266 0 1496701 405 381 24 38 0 158 1 amappl16 200 138931 0 138568 768 743 25 45 0 8 5 amappl15 192 5707 0 5699 1 0 1 1 0 8 0 amappl14 184 6568 0 6563 1 0 1 1 0 8 0 amappl13 176 5811 0 5809 1 0 1 1 0 8 0 amappl12 168 3079 0 3077 1 0 1 1 0 8 0 amappl11 160 2998 0 2984 1 0 1 1 0 8 0 amappl10 152 70 0 66 1 0 1 1 0 8 0 amappl9 144 9038 0 9036 1 0 1 1 0 8 0 amappl8 136 16650 0 16472 7 0 7 7 0 8 0 amappl7 128 15003 0 14995 1 0 1 1 0 8 0 amappl6 120 9025 0 9013 1 0 1 1 0 8 0 amappl5 112 37385 0 37368 1 0 1 1 0 8 0 amappl4 104 9806 0 9771 4 2 2 2 0 8 0 amappl3 96 8473 0 8451 1 0 1 1 0 8 0 amappl2 88 53500 0 53451 18 16 2 2 0 8 0 amappl1 80 781133 0 780698 12 2 10 12 0 8 0 amappl 88 583868 0 583703 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 72 141 0 11 3 0 3 3 0 8 0 uaddrrnd 24 44281 0 44263 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 44281 0 44263 1 0 1 1 0 8 0 vmmpekpl 168 352113 0 352087 2 0 2 2 0 8 0 vmmpepl 168 4132925 0 4131123 675 583 92 107 0 357 0 vmsppl 368 44280 0 44263 2 0 2 2 0 8 0 rwobjpl 56 1038019 0 1030729 276 172 104 110 0 8 0 pdppl 4096 88570 0 88526 75 29 46 50 0 8 2 pvpl 32 21836736 0 21820240 1530 1364 166 209 0 265 15 pmappl 248 44280 0 44263 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 2046 0 1068 29 0 29 29 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827adff0) 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 intr_handler(ffff8000246d7280,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __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(fffffd807efffa10,162a738000,0,2) at uvm_fault+0x193 sys/uvm/uvm_fault.c:624 upageflttrap(ffff8000246d75f0,162a738000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246d75f0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x15fa70e440, count: 4 ddb{0}> trace x86_ipi_db(ffffffff827adff0) 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 intr_handler(ffff8000246d7280,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __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(fffffd807efffa10,162a738000,0,2) at uvm_fault+0x193 sys/uvm/uvm_fault.c:624 upageflttrap(ffff8000246d75f0,162a738000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246d75f0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x15fa70e440, count: -11 ddb{0}> machine ddbcpu 1 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi uvm_fault_lower(ffff8000246e31d0,ffff8000246e3208,ffff8000246e3150,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffa10,20002000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff8000246e3340,20002000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246e3340) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffcebc0, count: 10 ddb{1}> trace uvm_fault_lower(ffff8000246e31d0,ffff8000246e3208,ffff8000246e3150,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffa10,20002000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff8000246e3340,20002000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246e3340) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffcebc0, count: -5