uvm_fault(0xfffffd807effe2e0, 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 *178272 57702 32767 0x10 0x4000000 0K syz-executor.2 491383 27792 32767 0x10 0x4000000 1 syz-executor.1 socreate(18,ffff800027ace498,3,3c) at socreate+0x84 sys/kern/uipc_socket.c:172 sys_socket(ffff8000211fb7b0,ffff800027ace528,ffff800027ace580) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 syscall(ffff800027ace5f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027ace5f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x44015393ae0, 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(0xfffffd807effe2e0, 0x0, 0, 1) -> e ddb{0}> trace socreate(18,ffff800027ace498,3,3c) at socreate+0x84 sys/kern/uipc_socket.c:172 sys_socket(ffff8000211fb7b0,ffff800027ace528,ffff800027ace580) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 syscall(ffff800027ace5f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027ace5f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x44015393ae0, count: -4 ddb{0}> show registers rdi 0xffff800024679000 rsi 0x1731 __ALIGN_SIZE+0x731 rbp 0xffff800027ace480 rbx 0x18 rdx 0xffff800024679000 rcx 0x1730 __ALIGN_SIZE+0x730 rax 0 r8 0xffffffff81e690f0 uvm_map_inentry_pc r9 0x16 r10 0 r11 0x41442a75439a6ea9 r12 0xffff800027ace498 r13 0xffffffff8288cea8 inet6sw+0x208 r14 0x3 r15 0x3c rip 0xffffffff81e82144 socreate+0x84 cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff800027ace420 ss 0x10 socreate+0x84: cmpq $0,0(%rax) ddb{0}> show proc PROC (syz-executor.2) pid=178272 stat=onproc flags process=10 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000211fa7f0,0xffff8000211fafe0 process=0xffff8000fffedd38 user=0xffff800027ac9000, vmspace=0xfffffd807effe2e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 73607 289266 39483 32767 2 0x10 syz-executor.3 71944 494953 65036 32767 2 0x10 syz-executor.5 71944 287348 65036 32767 3 0x4000090 fsleep syz-executor.5 71944 10272 65036 32767 3 0x4000090 fsleep syz-executor.5 20284 221271 62975 32767 2 0x10 syz-executor.6 20284 129240 62975 32767 2 0x4000010 syz-executor.6 39053 402043 55675 32767 3 0x90 nanoslp syz-executor.0 39053 418383 55675 32767 3 0x4000090 fsleep syz-executor.0 39053 483974 55675 32767 2 0x4000010 syz-executor.0 39053 13763 55675 32767 3 0x4000090 fsleep syz-executor.0 57702 131583 99248 32767 2 0x10 syz-executor.2 *57702 178272 99248 32767 7 0x4000010 syz-executor.2 27792 377923 82797 32767 2 0x10 syz-executor.1 27792 79427 82797 32767 2 0x4000010 syz-executor.1 27792 491383 82797 32767 7 0x4000010 syz-executor.1 27792 153297 82797 32767 3 0x4000090 fsleep syz-executor.1 39483 142045 93968 32767 2 0x490 syz-executor.3 93968 244664 32377 0 3 0x82 wait syz-executor.3 80189 10678 53162 32767 2 0x490 syz-executor.4 53162 29798 32377 0 3 0x82 wait syz-executor.4 82797 129992 63683 32767 3 0x90 nanoslp syz-executor.1 63683 82712 32377 0 3 0x82 wait syz-executor.1 99248 149331 99055 32767 2 0x490 syz-executor.2 99055 178389 32377 0 3 0x82 wait syz-executor.2 84038 59647 0 0 3 0x14200 bored sosplice 51720 247047 98204 32767 2 0x10 syz-executor.7 98204 521122 32377 0 3 0x82 wait syz-executor.7 62975 152576 80353 32767 2 0x490 syz-executor.6 80353 245479 32377 0 3 0x82 wait syz-executor.6 65036 375025 21992 32767 2 0x490 syz-executor.5 21992 215423 32377 0 3 0x82 wait syz-executor.5 55675 338729 17075 32767 3 0x90 nanoslp syz-executor.0 17075 234810 32377 0 3 0x82 wait syz-executor.0 32377 309250 46161 0 3 0x82 thrsleep syz-fuzzer 32377 442559 46161 0 3 0x4000082 nanoslp syz-fuzzer 32377 399702 46161 0 3 0x4000082 thrsleep syz-fuzzer 32377 186215 46161 0 3 0x4000082 thrsleep syz-fuzzer 32377 93626 46161 0 3 0x4000082 thrsleep syz-fuzzer 32377 112614 46161 0 3 0x4000082 thrsleep syz-fuzzer 32377 490062 46161 0 3 0x4000082 thrsleep syz-fuzzer 32377 141461 46161 0 3 0x4000082 kqread syz-fuzzer 32377 135991 46161 0 3 0x4000082 thrsleep syz-fuzzer 32377 478152 46161 0 3 0x4000082 thrsleep syz-fuzzer 46161 271937 17399 0 3 0x10008a sigsusp ksh 17399 238151 27996 0 3 0x9a kqread sshd 33935 55390 1 0 3 0x100083 ttyin getty 27996 416577 1 0 3 0x88 kqread sshd 84645 85186 85212 73 3 0x1100090 kqread syslogd 85212 89626 1 0 3 0x100082 netio syslogd 59333 170494 1 0 3 0x100080 kqread resolvd 63225 333059 99967 77 3 0x100092 kqread dhcpleased 20093 357894 99967 77 3 0x100092 kqread dhcpleased 99967 113072 1 0 3 0x80 kqread dhcpleased 83135 447477 0 0 3 0x14200 bored smr 38629 432958 0 0 2 0x14200 zerothread 99104 408402 0 0 3 0x14200 aiodoned aiodoned 44593 73502 0 0 3 0x14200 syncer update 53968 28037 0 0 3 0x14200 cleaner cleaner 23814 430237 0 0 3 0x14200 reaper reaper 70729 77391 0 0 3 0x14200 pgdaemon pagedaemon 501 405783 0 0 3 0x14200 bored viomb 31430 181619 0 0 3 0x40014200 acpi0 acpi0 62901 189629 0 0 3 0x40014200 idle1 52859 85788 0 0 3 0x14200 bored softnet 60349 255807 0 0 3 0x14200 bored systqmp 74466 125362 0 0 3 0x14200 bored systq 80677 392814 0 0 2 0x40014200 softclock 90796 302666 0 0 3 0x40014200 idle0 1 108170 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 57702 (syz-executor.2) thread 0xffff8000211fb7b0 (178272) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82abcc60) #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 51720 (syz-executor.7) thread 0xffff80002120a7f0 (247047) exclusive rrwlock inode r = 0 (0xfffffd8078bb8708) #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 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+0x1be 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:3101 #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 (0xfffffd80722400a0) #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 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086 #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 10203 6411K 6419K 78643K 11328 0 pcb 13 16K 20K 78643K 19 0 rtable 268 7K 8K 78643K 1985 0 ifaddr 81 17K 17K 78643K 160 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 78 0 ioctlops 0 0K 2K 78643K 325 0 iov 0 0K 28K 78643K 2529 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 5521 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 308 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 7208 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 125K 78643K 20809 0 sigio 0 0K 0K 78643K 1294 0 proc 57 86K 123K 78643K 2047 0 subproc 104 6K 6K 78643K 247 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1769 0 in_multi 99 6K 7K 78643K 501 0 ether_multi 1 0K 0K 78643K 108 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 235 1049K 1049K 78643K 235 0 exec 0 0K 2K 78643K 4536 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 498 98K 112K 78643K 271022 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 346 0 NDP 11 0K 2K 78643K 60 0 temp 125 4703K 4831K 78643K 51248 0 kqueue 12 18K 30K 78643K 1632 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 1931 0 1928 23 22 1 3 0 8 0 rtentry 112 278 0 153 4 0 4 4 0 8 0 unpcb 136 14445 0 14432 150 149 1 10 0 8 0 syncache 296 226 0 226 36 35 1 1 0 8 1 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 60 0 60 24 23 1 1 0 8 1 tcpcb 736 9194 0 9187 232 228 4 19 0 8 3 arp 120 42 0 24 1 0 1 1 0 8 0 ipq 40 31 0 31 10 9 1 1 0 8 1 ipqe 40 404 0 404 10 9 1 1 0 8 1 inpcb 304 33165 0 33158 295 289 6 21 0 8 5 rttmr 72 118 0 116 1 0 1 1 0 8 0 ip6q 72 70 0 70 8 8 0 1 0 8 0 ip6af 40 186 0 186 8 8 0 1 0 8 0 nd6 48 95 0 58 1 0 1 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1230 0 658 41 5 36 38 0 8 0 art_table 32 1231 0 658 5 0 5 5 0 8 0 art_node 16 277 0 162 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 7206 0 7196 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 29317 0 27866 91 0 91 91 0 8 0 ffsino 272 29317 0 27866 97 0 97 97 0 8 0 nchpl 144 56501 0 54870 62 0 62 62 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 188817 0 188816 5 4 1 2 0 8 0 percpumem 16 51 0 11 1 0 1 1 0 8 0 scxspl 216 168175 0 168175 49 48 1 8 0 8 1 plimitpl 152 4345 0 4323 15 14 1 2 0 8 0 sigapl 424 21070 0 21019 7 1 6 7 0 8 0 futexpl 64 182929 0 182924 7 6 1 1 0 8 0 knotepl 120 1428 0 0 18 2 16 17 0 8 0 kqueuepl 216 6787 0 6779 101 100 1 8 0 8 0 pipepl 336 4299 0 4271 115 112 3 9 0 8 0 fdescpl 496 21055 0 21020 7 2 5 6 0 8 0 filepl 152 150378 0 150047 245 230 15 22 0 8 2 lockfpl 104 2829 0 2827 1 0 1 1 0 8 0 lockfspl 48 803 0 801 1 0 1 1 0 8 0 sessionpl 144 34 0 18 1 0 1 1 0 8 0 pgrppl 48 562 0 546 1 0 1 1 0 8 0 ucredpl 96 25084 0 25066 1 0 1 1 0 8 0 zombiepl 144 21020 0 21019 4 3 1 1 0 8 0 processpl 1064 21070 0 21019 5 1 4 4 0 8 0 procpl 672 62212 0 62142 32 25 7 8 0 8 0 sosppl 168 266 0 266 36 36 0 1 0 8 0 sockpl 480 50190 0 50167 931 920 11 40 0 8 8 mcl64k 65536 73 0 0 5 1 4 4 0 8 0 mcl16k 16384 49 0 0 6 3 3 3 0 8 0 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 36 0 0 3 1 2 2 0 8 0 mcl8k 8192 41 0 0 5 2 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 63 0 0 4 2 2 4 0 8 0 mcl2k 2048 362 0 0 19 2 17 19 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 3904 0 0 232 0 232 232 0 8 0 bufpl 288 35210 0 28875 453 0 453 453 0 8 0 anonpl 24 6126957 0 6111686 339 225 114 138 0 186 0 amapchunkpl 152 680598 0 679765 228 193 35 50 0 158 0 amappl16 200 62749 0 62364 273 251 22 42 0 8 0 amappl15 192 1897 0 1891 1 0 1 1 0 8 0 amappl14 184 382 0 377 1 0 1 1 0 8 0 amappl13 176 4036 0 4029 1 0 1 1 0 8 0 amappl12 168 3823 0 3818 1 0 1 1 0 8 0 amappl11 160 2257 0 2246 1 0 1 1 0 8 0 amappl10 152 2736 0 2730 1 0 1 1 0 8 0 amappl9 144 3010 0 3004 1 0 1 1 0 8 0 amappl8 136 5624 0 5407 10 2 8 8 0 8 0 amappl7 128 3841 0 3826 1 0 1 1 0 8 0 amappl6 120 2787 0 2761 2 1 1 2 0 8 0 amappl5 112 18177 0 18156 1 0 1 1 0 8 0 amappl4 104 6282 0 6252 1 0 1 1 0 8 0 amappl3 96 5476 0 5464 1 0 1 1 0 8 0 amappl2 88 9602 0 9546 3 1 2 3 0 8 0 amappl1 80 379897 0 379249 18 3 15 18 0 8 0 amappl 88 269360 0 269075 8 0 8 8 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 21055 0 21020 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 21055 0 21020 1 0 1 1 0 8 0 vmmpekpl 168 167664 0 167607 3 0 3 3 0 8 0 vmmpepl 168 1933663 0 1930836 308 175 133 144 0 357 1 vmsppl 368 21054 0 21020 4 0 4 4 0 8 0 rwobjpl 56 474242 0 466682 132 21 111 112 0 8 0 pdppl 4096 42117 0 42040 474 393 81 95 0 8 4 pvpl 32 9992139 0 9971407 642 455 187 244 0 265 0 pmappl 248 21054 0 21020 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1789 0 752 31 0 31 31 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace socreate(18,ffff800027ace498,3,3c) at socreate+0x84 sys/kern/uipc_socket.c:172 sys_socket(ffff8000211fb7b0,ffff800027ace528,ffff800027ace580) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 syscall(ffff800027ace5f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027ace5f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x44015393ae0, 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 __mp_lock(ffffffff82abca58) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82abca58) at __mp_lock+0x122 sys/kern/kern_lock.c:147 vn_closefile(fffffd80791abad0,ffff8000ffff47e8) at vn_closefile+0x34 sys/kern/vfs_vnops.c:617 fdrop(fffffd80791abad0,ffff8000ffff47e8) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80791abad0,ffff8000ffff47e8) at closef+0x11c sys/kern/kern_descrip.c:1263 syscall(ffff800027b1bf50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b1bf50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x29fde16c0, count: 6 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 __mp_lock(ffffffff82abca58) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82abca58) at __mp_lock+0x122 sys/kern/kern_lock.c:147 vn_closefile(fffffd80791abad0,ffff8000ffff47e8) at vn_closefile+0x34 sys/kern/vfs_vnops.c:617 fdrop(fffffd80791abad0,ffff8000ffff47e8) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80791abad0,ffff8000ffff47e8) at closef+0x11c sys/kern/kern_descrip.c:1263 syscall(ffff800027b1bf50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b1bf50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x29fde16c0, count: -9