uvm_fault(0xfffffd807342dba0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at socreate+0x84: cmpq $0,0(%rax) TID PID UID PRFLAGS PFLAGS CPU COMMAND * 38686 91045 0 0 0x4000000 0K syz-executor.6 socreate(18,ffff80002e3b41a8,0,29) at socreate+0x84 sys/kern/uipc_socket.c:172 sys_socket(ffff80002119fa40,ffff80002e3b4238,ffff80002e3b4290) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 syscall(ffff80002e3b4300) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3b4300) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f40ac3edc0, count: 11 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(0xfffffd807342dba0, 0x0, 0, 1) -> e ddb{0}> trace socreate(18,ffff80002e3b41a8,0,29) at socreate+0x84 sys/kern/uipc_socket.c:172 sys_socket(ffff80002119fa40,ffff80002e3b4238,ffff80002e3b4290) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 syscall(ffff80002e3b4300) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3b4300) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f40ac3edc0, count: -4 ddb{0}> show registers rdi 0xffff80002af13000 rsi 0x17 rbp 0xffff80002e3b4190 rbx 0x18 rdx 0xffff80002af13000 rcx 0x16 rax 0 r8 0xffffffff811cfb80 uvm_map_inentry_pc r9 0x18 r10 0 r11 0x9024502028cbe924 r12 0xffff80002e3b41a8 r13 0xffffffff82675e40 inet6sw r14 0 r15 0x29 rip 0xffffffff81b8f4e4 socreate+0x84 cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff80002e3b4130 ss 0x10 socreate+0x84: cmpq $0,0(%rax) ddb{0}> show proc PROC (syz-executor.6) pid=38686 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff800027ee4550,0xffffffff82b22b18 process=0xffff8000ffff31f8 user=0xffff80002e3af000, vmspace=0xfffffd807342dba0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91045 205789 96132 0 2 0 syz-executor.6 *91045 38686 96132 0 7 0x4000000 syz-executor.6 20194 131146 95981 0 2 0 syz-executor.1 20194 380522 95981 0 3 0x4000080 fsleep syz-executor.1 58389 522860 3433 0 2 0 syz-executor.2 96796 134245 34394 0 2 0x482 syz-executor.0 95981 205907 34394 0 3 0x82 nanoslp syz-executor.1 2265 361260 34394 0 2 0x2 syz-executor.7 3433 510383 34394 0 3 0x82 nanoslp syz-executor.2 59531 407936 34394 0 2 0x2 syz-executor.3 4658 481518 34394 0 2 0x2 syz-executor.4 96132 437840 34394 0 2 0x482 syz-executor.6 62214 481212 34394 0 2 0x2 syz-executor.5 92303 67791 0 0 3 0x14280 nfsidl nfsio 31281 345047 0 0 3 0x14280 nfsidl nfsio 45627 285421 0 0 3 0x14280 nfsidl nfsio 89206 369880 0 0 3 0x14280 nfsidl nfsio 81792 295728 0 0 3 0x14280 nfsidl nfsio 75866 408886 0 0 3 0x14280 nfsidl nfsio 94330 6808 0 0 3 0x14280 nfsidl nfsio 11536 271187 0 0 3 0x14280 nfsidl nfsio 9912 279158 0 0 3 0x14280 nfsidl nfsio 314 198301 0 0 3 0x14280 nfsidl nfsio 82970 240904 0 0 3 0x14280 nfsidl nfsio 69404 381357 0 0 3 0x14280 nfsidl nfsio 38260 495062 0 0 3 0x14280 nfsidl nfsio 57631 11844 0 0 3 0x14280 nfsidl nfsio 55545 365439 0 0 3 0x14280 nfsidl nfsio 75312 245625 0 0 3 0x14280 nfsidl nfsio 68084 124592 0 0 3 0x14280 nfsidl nfsio 46334 352838 0 0 3 0x14280 nfsidl nfsio 98435 488719 0 0 3 0x14280 nfsidl nfsio 79173 158518 0 0 3 0x14280 nfsidl nfsio 14400 346642 1 0 3 0x100083 ttyin getty 94319 276763 0 0 3 0x14200 bored sosplice 34394 22989 80555 0 3 0x82 thrsleep syz-fuzzer 34394 137684 80555 0 3 0x4000082 nanoslp syz-fuzzer 34394 61465 80555 0 3 0x4000082 thrsleep syz-fuzzer 34394 336599 80555 0 3 0x4000082 nanoslp syz-fuzzer 34394 455274 80555 0 3 0x4000082 thrsleep syz-fuzzer 34394 389375 80555 0 3 0x4000082 thrsleep syz-fuzzer 34394 515197 80555 0 3 0x4000082 kqread syz-fuzzer 34394 236680 80555 0 3 0x4000082 thrsleep syz-fuzzer 34394 262637 80555 0 3 0x4000082 thrsleep syz-fuzzer 80555 356954 91579 0 3 0x10008a sigsusp ksh 91579 466330 72752 0 3 0x9a kqread sshd 72752 58166 1 0 3 0x88 kqread sshd 80586 367035 82284 74 3 0x1100092 bpf pflogd 82284 325163 1 0 3 0x80 netio pflogd 73588 18887 52126 73 3 0x1100090 kqread syslogd 52126 305019 1 0 3 0x100082 netio syslogd 45906 186943 1 0 3 0x100080 kqread resolvd 644 36198 75973 77 3 0x100092 kqread dhcpleased 38323 107170 75973 77 3 0x100092 kqread dhcpleased 75973 479437 1 0 3 0x80 kqread dhcpleased 3703 280102 0 0 3 0x14200 bored smr 28741 135694 0 0 2 0x14200 zerothread 38644 129558 0 0 3 0x14200 aiodoned aiodoned 62748 77200 0 0 3 0x14200 syncer update 60134 327877 0 0 3 0x14200 cleaner cleaner 35298 248422 0 0 3 0x14200 reaper reaper 74616 270389 0 0 3 0x14200 pgdaemon pagedaemon 17051 457251 0 0 3 0x14200 bored viomb 25554 227790 0 0 3 0x40014200 acpi0 acpi0 63625 447677 0 0 7 0x40014200 idle1 25498 251703 0 0 3 0x14200 bored softnet 25796 292414 0 0 3 0x14200 bored systqmp 65933 32991 0 0 3 0x14200 bored systq 76466 155339 0 0 2 0x40014200 softclock 93720 22689 0 0 3 0x40014200 idle0 1 61686 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 91045 (syz-executor.6) thread 0xffff80002119fa40 (38686) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b6e770) #0 witness_lock+0x44d #1 kpageflttrap+0x23d sys/arch/amd64/amd64/trap.c:274 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #3 alltraps_kern_meltdown+0x7b #4 socreate+0x84 sys/kern/uipc_socket.c:172 #5 sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 4658 (syz-executor.4) thread 0xffff800027ee4fd0 (481518) exclusive rrwlock inode r = 0 (0xfffffd806e208708) #0 witness_lock+0x44d #1 rw_enter+0x3e1 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 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8075026a30) #0 witness_lock+0x44d #1 rw_enter+0x3e1 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+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 6505K 7386K 78643K 36876 0 pcb 13 22K 26K 78643K 13831 0 rtable 246 20K 25K 78643K 5275 0 ifaddr 99 23K 28K 78643K 8965 0 sysctl 2 0K 0K 78643K 2 0 counters 58 35K 36K 78643K 442 0 ioctlops 0 0K 4K 78643K 34639 0 iov 0 0K 24K 78643K 2341 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1361 85K 85K 78643K 11551 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 183 0 VM map 2 1K 1K 78643K 2 0 sem 15 5K 8K 78643K 249 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 89K 78643K 50342 0 sigio 0 0K 0K 78643K 948 0 proc 71 87K 124K 78643K 2593 0 subproc 104 6K 6K 78643K 468 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1753 0 in_multi 90 6K 6K 78643K 2874 0 ether_multi 1 0K 0K 78643K 940 0 mrt 1 0K 0K 78643K 1039 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 205 917K 917K 78643K 205 0 exec 0 0K 2K 78643K 3443 0 pfkey data 0 0K 0K 78643K 11 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 699 727K 730K 78643K 611783 0 UVM aobj 34 4K 4K 78643K 40 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10179 0 NDP 14 0K 2K 78643K 363 0 temp 165 4753K 8921K 78643K 328022 0 kqueue 12 18K 26K 78643K 1217 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 120 787 0 784 7 6 1 4 0 8 0 rtentry 112 1271 0 1177 4 1 3 4 0 8 0 unpcb 136 19737 0 19719 163 155 8 9 0 8 7 syncache 296 54 0 54 11 11 0 1 0 8 0 tcpqe 32 7 0 7 3 3 0 1 0 8 0 tcpcb 736 20774 0 20699 386 379 7 25 0 8 0 arp 120 80 0 64 1 0 1 1 0 8 0 inpcb 304 108811 0 108801 506 487 19 22 0 8 18 rttmr 72 417 0 417 8 8 0 1 0 8 0 ip6q 72 4 0 4 1 1 0 1 0 8 0 ip6af 40 12 0 12 1 1 0 1 0 8 0 nd6 48 209 0 184 1 0 1 1 0 8 0 pkpcb 40 62 0 62 10 10 0 1 0 8 0 kcovpl 48 36 0 28 1 0 1 1 0 8 0 ppxss 1248 98 0 98 17 17 0 1 0 8 0 pfstscr 40 66 0 66 7 7 0 1 0 8 0 pffrag 232 7665 0 7665 10 9 1 5 0 482 1 pffrnode 88 3914 0 3914 8 7 1 2 0 8 1 pffrent 40 17709 0 17709 6 5 1 1 0 8 1 pfosfp 40 1433 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1433 0 714 21 0 21 21 0 8 0 pfrktable 1344 663 0 654 6 4 2 2 0 8 0 pftag 88 16 0 8 1 0 1 1 0 8 0 pfstitem 24 39 0 37 1 0 1 1 0 8 0 pfstkey 112 176 0 174 1 0 1 1 0 8 0 pfstate 320 110 0 108 3 2 1 3 0 8 0 pfsrctr 152 30 0 30 3 3 0 1 0 8 0 pfrule 1360 11383 0 11207 138 114 24 134 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4192 0 3745 51 20 31 32 0 8 0 art_table 32 4193 0 3745 5 0 5 5 0 8 0 art_node 16 1206 0 1123 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 24 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 233 0 220 1 0 1 1 0 8 0 shmpl 112 37 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 59789 0 58166 102 0 102 102 0 8 0 ffsino 272 59789 0 58166 109 0 109 109 0 8 0 nchpl 144 118955 0 117320 63 0 63 63 0 8 0 uvmvnodes 80 6819 0 0 140 0 140 140 0 8 0 vnodes 224 6819 0 0 402 0 402 402 0 8 0 namei 1024 341322 0 341322 10 9 1 2 0 8 1 percpumem 16 233 0 192 1 0 1 1 0 8 0 vcpupl 2048 81 0 1 11 0 11 11 0 8 0 vmpool 560 103 0 23 6 0 6 6 0 8 0 pfiaddrpl 120 1579 0 1572 7 6 1 3 0 8 0 scsiplug 72 13 0 13 3 3 0 1 0 8 0 scxspl 216 345291 0 345291 23 22 1 5 0 8 1 plimitpl 152 1178 0 1163 1 0 1 1 0 8 0 sigapl 424 50612 0 50550 8 0 8 8 0 8 0 futexpl 64 470320 0 470319 5 4 1 1 0 8 0 knotepl 120 601 0 0 10 3 7 9 0 8 0 kqueuepl 216 6317 0 6309 87 86 1 6 0 8 0 pipepl 336 3925 0 3897 111 108 3 8 0 8 0 fdescpl 496 50575 0 50549 5 0 5 5 0 8 0 filepl 152 286564 0 286320 321 302 19 23 0 8 9 lockfpl 104 6570 0 6568 14 13 1 2 0 8 0 lockfspl 48 1902 0 1900 1 0 1 1 0 8 0 sessionpl 144 54 0 37 1 0 1 1 0 8 0 pgrppl 48 108 0 91 1 0 1 1 0 8 0 ucredpl 96 21740 0 21677 2 0 2 2 0 8 0 zombiepl 144 50551 0 50550 6 5 1 1 0 8 0 processpl 1064 50612 0 50550 5 0 5 5 0 8 0 procpl 672 119827 0 119755 24 16 8 10 0 8 0 srpgc 96 20 0 20 9 9 0 1 0 8 0 sosppl 168 117 0 117 21 21 0 1 0 8 0 sockpl 480 129484 0 129452 1718 1685 33 38 0 8 28 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 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 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 1316 0 0 37 3 34 34 0 8 0 mtagpl 96 1591 0 0 30 13 17 17 0 8 0 mbufpl 256 2348 0 0 78 7 71 71 0 8 0 bufpl 288 64324 0 57505 488 0 488 488 0 8 0 anonpl 24 13325167 0 13307938 309 192 117 141 0 186 0 amapchunkpl 152 1473395 0 1472700 134 99 35 44 0 158 0 amappl16 200 105428 0 104863 121 90 31 43 0 8 0 amappl15 192 6600 0 6595 1 0 1 1 0 8 0 amappl14 184 2024 0 2017 1 0 1 1 0 8 0 amappl13 176 4280 0 4277 1 0 1 1 0 8 0 amappl12 168 6963 0 6954 1 0 1 1 0 8 0 amappl11 160 10090 0 10074 1 0 1 1 0 8 0 amappl10 152 4754 0 4740 1 0 1 1 0 8 0 amappl9 144 4667 0 4664 1 0 1 1 0 8 0 amappl8 136 15560 0 15209 14 1 13 13 0 8 0 amappl7 128 13090 0 13077 1 0 1 1 0 8 0 amappl6 120 4517 0 4482 6 4 2 2 0 8 0 amappl5 112 52634 0 52618 1 0 1 1 0 8 0 amappl4 104 13191 0 13146 7 5 2 2 0 8 0 amappl3 96 8854 0 8842 1 0 1 1 0 8 0 amappl2 88 8562 0 8499 3 1 2 3 0 8 0 amappl1 80 853616 0 853090 20 6 14 19 0 8 0 amappl 88 609886 0 609605 11 2 9 9 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 39 0 6 1 0 1 1 0 8 0 uaddrrnd 24 50678 0 50572 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 50678 0 50572 1 0 1 1 0 8 0 vmmpekpl 168 266755 0 266664 5 0 5 5 0 8 0 vmmpepl 168 4370341 0 4367593 335 190 145 158 0 357 0 vmsppl 368 50677 0 50572 12 1 11 11 0 8 0 rwobjpl 56 980933 0 972237 146 21 125 125 0 8 0 pdppl 4096 101363 0 101224 889 740 149 151 0 8 10 pvpl 32 22066167 0 22044759 644 443 201 262 0 265 8 pmappl 248 50677 0 50572 7 0 7 7 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2434 0 1383 32 0 32 32 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace socreate(18,ffff80002e3b41a8,0,29) at socreate+0x84 sys/kern/uipc_socket.c:172 sys_socket(ffff80002119fa40,ffff80002e3b4238,ffff80002e3b4290) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 syscall(ffff80002e3b4300) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3b4300) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f40ac3edc0, count: -4 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5