uvm_fault(0xfffffd8068759190, 0x4, 0, 1) -> e kernel: page fault trap, code=0 Stopped at igmp_leavegroup+0x80: movl 0x4(%rax),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND 401332 28703 0 0 0 1 syz-executor.4 igmp_leavegroup(ffff800000c3c000) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c3c000) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff8000006c6a50) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f67a138) at in_pcbdetach+0xfc sys/netinet/in_pcb.c:585 udp_detach(fffffd807c21b1f8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1258 soclose(fffffd807c21b1f8,0) at soclose+0x255 sys/kern/uipc_socket.c:351 soo_close(fffffd8067c87140,ffff8000246aafd0) at soo_close+0x40 fdrop(fffffd8067c87140,ffff8000246aafd0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8067c87140,ffff8000246aafd0) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000246aafd0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000246aafd0,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000246aafd0,ffff800026312020,ffff800026312080) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000263120f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000263120f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffaed0, count: 1 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(0xfffffd8068759190, 0x4, 0, 1) -> e ddb{0}> trace igmp_leavegroup(ffff800000c3c000) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c3c000) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff8000006c6a50) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f67a138) at in_pcbdetach+0xfc sys/netinet/in_pcb.c:585 udp_detach(fffffd807c21b1f8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1258 soclose(fffffd807c21b1f8,0) at soclose+0x255 sys/kern/uipc_socket.c:351 soo_close(fffffd8067c87140,ffff8000246aafd0) at soo_close+0x40 fdrop(fffffd8067c87140,ffff8000246aafd0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8067c87140,ffff8000246aafd0) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000246aafd0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000246aafd0,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000246aafd0,ffff800026312020,ffff800026312080) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000263120f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000263120f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffaed0, count: -14 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800026311ca0 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0x63d28ea0a9cd17f8 r11 0xae50550d997d9f5a r12 0 r13 0x3 r14 0xffff800000689000 r15 0xffff800000c3c000 rip 0xffffffff813cf300 igmp_leavegroup+0x80 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800026311c70 ss 0x10 igmp_leavegroup+0x80: movl 0x4(%rax),%r12d ddb{0}> show proc PROC (syz-executor.5) pid=217907 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff5268,0xffff80002119ea90 process=0xffff8000ffff29a8 user=0xffff80002630d000, vmspace=0xfffffd8068759190 estcpu=31, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38773 215291 26184 0 2 0 syz-executor.0 28703 401332 61323 0 7 0 syz-executor.4 96465 473822 67850 0 2 0 syz-executor.2 96465 414261 67850 0 3 0x4000080 fsleep syz-executor.2 96465 464541 67850 0 2 0x4000000 syz-executor.2 21374 191384 47697 0 2 0 syz-executor.3 21374 149120 47697 0 2 0x4000000 syz-executor.3 5574 488372 35356 0 3 0x80 nanoslp syz-executor.7 5574 507461 35356 0 3 0x4000080 netio syz-executor.7 5574 506720 35356 0 3 0x4000080 netio syz-executor.7 5574 403284 35356 0 3 0x4000080 fsleep syz-executor.7 74585 1141 22817 0 2 0 syz-executor.6 74585 246281 22817 0 3 0x4000080 netio syz-executor.6 74585 185148 22817 0 2 0x4000000 syz-executor.6 22817 405317 46501 0 3 0x82 nanoslp syz-executor.6 25578 494599 46501 0 2 0x2 syz-executor.5 1966 494554 0 0 3 0x14200 bored sosplice 35356 324278 46501 0 3 0x82 nanoslp syz-executor.7 47697 88016 46501 0 3 0x82 nanoslp syz-executor.3 67850 105950 46501 0 3 0x82 nanoslp syz-executor.2 61323 284367 46501 0 3 0x82 nanoslp syz-executor.4 76846 520438 46501 0 2 0x2 syz-executor.1 26184 492522 46501 0 3 0x82 nanoslp syz-executor.0 46501 65571 61579 0 2 0x2 syz-fuzzer 46501 6062 61579 0 3 0x4000082 nanoslp syz-fuzzer 46501 388302 61579 0 3 0x4000082 thrsleep syz-fuzzer 46501 29814 61579 0 3 0x4000082 thrsleep syz-fuzzer 46501 325912 61579 0 3 0x4000082 thrsleep syz-fuzzer 46501 259414 61579 0 3 0x4000082 thrsleep syz-fuzzer 46501 133622 61579 0 3 0x4000082 thrsleep syz-fuzzer 46501 144161 61579 0 3 0x4000082 nanoslp syz-fuzzer 46501 482596 61579 0 3 0x4000082 thrsleep syz-fuzzer 61579 312589 59732 0 3 0x10008a sigsusp ksh 59732 61867 7849 0 3 0x9a kqread sshd 70941 233204 1 0 3 0x100083 ttyin getty 7849 25974 1 0 3 0x88 kqread sshd 16697 242435 25035 74 3 0x1100092 bpf pflogd 25035 303551 1 0 3 0x80 netio pflogd 81732 402835 12404 73 3 0x1100090 kqread syslogd 12404 248568 1 0 3 0x100082 netio syslogd 99789 425706 1 0 3 0x100080 kqread resolvd 39084 380244 91295 77 3 0x100092 kqread dhcpleased 22210 288743 91295 77 3 0x100092 kqread dhcpleased 91295 321600 1 0 3 0x80 kqread dhcpleased 81791 259995 0 0 3 0x14200 bored smr 72665 182216 0 0 2 0x14200 zerothread 42170 454404 0 0 3 0x14200 aiodoned aiodoned 19785 280580 0 0 3 0x14200 syncer update 36666 1911 0 0 3 0x14200 cleaner cleaner 33116 248467 0 0 3 0x14200 reaper reaper 52108 29862 0 0 3 0x14200 pgdaemon pagedaemon 43751 67647 0 0 3 0x14200 bored viomb 40069 170071 0 0 3 0x40014200 acpi0 acpi0 51316 299 0 0 3 0x40014200 idle1 40967 105755 0 0 2 0x14200 softnet 53165 339998 0 0 3 0x14200 bored systqmp 14354 517354 0 0 3 0x14200 bored systq 64788 385721 0 0 3 0x40014200 bored softclock 8381 390980 0 0 3 0x40014200 idle0 1 63750 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10194 6624K 6753K 78643K 19984 0 pcb 13 12K 14K 78643K 124 0 rtable 230 8K 9K 78643K 444 0 ifaddr 91 18K 19K 78643K 117 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 60 0 ioctlops 0 0K 4K 78643K 1580 0 iov 0 0K 12K 78643K 192 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1337 84K 84K 78643K 3724 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 47 0 VM map 2 1K 1K 78643K 2 0 sem 10 0K 0K 78643K 10 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 89K 78643K 10495 0 sigio 0 0K 0K 78643K 8 0 proc 72 87K 124K 78643K 653 0 subproc 104 6K 6K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 2991 0 in_multi 101 6K 6K 78643K 1071 0 ether_multi 1 0K 0K 78643K 1 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 2K 78643K 1068 0 pfkey data 0 0K 0K 78643K 4 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 390 134K 135K 78643K 134931 0 UVM aobj 43 2K 2K 78643K 46 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 24 0 NDP 12 0K 1K 78643K 34 0 temp 130 4709K 4773K 78643K 36270 0 kqueue 12 18K 26K 78643K 622 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 50 0 47 1 0 1 1 0 8 0 rtentry 112 138 0 36 4 0 4 4 0 8 0 unpcb 136 15303 0 15276 73 67 6 12 0 8 5 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 137 0 137 1 1 0 1 0 8 0 tcpcb 736 2575 0 2569 90 89 1 11 0 8 0 arp 120 22 0 4 1 0 1 1 0 8 0 inpcb 312 5393 0 5384 92 86 6 14 0 8 5 nd6 48 34 0 7 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 1 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 pffrag 232 1856 0 1840 3 1 2 2 0 482 0 pffrnode 88 558 0 547 1 0 1 1 0 8 0 pffrent 40 4012 0 3996 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 5 0 1 1 0 1 1 0 8 0 pfstitem 24 23 0 21 1 0 1 1 0 8 0 pfstkey 112 23 0 21 1 0 1 1 0 8 0 pfstate 320 23 0 21 2 1 1 2 0 8 0 pfrule 1360 28 0 20 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 579 0 155 31 4 27 29 0 8 0 art_table 32 580 0 155 4 0 4 4 0 8 0 art_node 16 137 0 47 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 11 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 43 0 3 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 12732 0 11294 91 0 91 91 0 8 0 ffsino 272 12732 0 11294 97 0 97 97 0 8 0 nchpl 144 25210 0 23578 63 0 63 63 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 66104 0 66104 2 1 1 2 0 8 1 percpumem 16 42 0 2 1 0 1 1 0 8 0 vcpupl 2048 4 0 0 1 0 1 1 0 8 0 vmpool 560 5 0 1 2 1 1 1 0 8 0 pfiaddrpl 120 3 0 0 1 0 1 1 0 8 0 scxspl 216 69834 0 69834 9 8 1 8 0 8 1 plimitpl 152 40 0 25 1 0 1 1 0 8 0 sigapl 424 10797 0 10752 6 0 6 6 0 8 0 futexpl 64 77424 0 77422 1 0 1 1 0 8 0 knotepl 120 587 0 0 14 3 11 11 0 8 0 kqueuepl 216 945 0 937 7 6 1 5 0 8 0 pipepl 336 987 0 959 29 26 3 8 0 8 0 fdescpl 496 10782 0 10752 5 1 4 5 0 8 0 filepl 152 47399 0 47142 105 90 15 27 0 8 5 lockfpl 104 439 0 437 2 1 1 2 0 8 0 lockfspl 48 128 0 126 1 0 1 1 0 8 0 sessionpl 144 26 0 9 1 0 1 1 0 8 0 pgrppl 48 432 0 415 1 0 1 1 0 8 0 ucredpl 96 830 0 818 1 0 1 1 0 8 0 zombiepl 144 10753 0 10752 1 0 1 1 0 8 0 processpl 1064 10797 0 10752 4 0 4 4 0 8 0 procpl 672 29305 0 29244 18 12 6 7 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 6 0 6 1 1 0 1 0 8 0 sockpl 480 20752 0 20713 498 486 12 43 0 8 7 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 33 0 0 4 1 3 3 0 8 0 mcl12k 12288 41 0 0 3 1 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 260 0 0 21 0 21 21 0 8 0 mtagpl 96 464 0 0 9 0 9 9 0 8 0 mbufpl 256 963 0 0 46 1 45 45 0 8 0 bufpl 288 14419 0 8080 453 0 453 453 0 8 0 anonpl 24 2870274 0 2851875 135 20 115 116 0 186 0 amapchunkpl 152 321894 0 321016 62 24 38 38 0 158 2 amappl16 200 21337 0 20825 28 0 28 28 0 8 0 amappl15 192 106 0 100 1 0 1 1 0 8 0 amappl14 184 1336 0 1332 1 0 1 1 0 8 0 amappl13 176 96 0 92 1 0 1 1 0 8 0 amappl12 168 1717 0 1713 1 0 1 1 0 8 0 amappl11 160 47 0 32 1 0 1 1 0 8 0 amappl10 152 1716 0 1708 1 0 1 1 0 8 0 amappl9 144 3487 0 3480 1 0 1 1 0 8 0 amappl8 136 3443 0 3348 4 0 4 4 0 8 0 amappl7 128 2780 0 2766 1 0 1 1 0 8 0 amappl6 120 3218 0 3194 2 1 1 2 0 8 0 amappl5 112 12875 0 12853 1 0 1 1 0 8 0 amappl4 104 1029 0 1002 2 1 1 2 0 8 0 amappl3 96 2753 0 2740 1 0 1 1 0 8 0 amappl2 88 931 0 885 3 0 3 3 0 8 0 amappl1 80 193984 0 193396 26 13 13 19 0 8 0 amappl 88 134395 0 134117 7 0 7 7 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 45 0 3 1 0 1 1 0 8 0 uaddrrnd 24 10787 0 10753 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10787 0 10753 1 0 1 1 0 8 0 vmmpekpl 168 70412 0 70370 3 0 3 3 0 8 0 vmmpepl 168 944061 0 941487 170 51 119 137 0 357 2 vmsppl 368 10786 0 10753 5 1 4 4 0 8 0 rwobjpl 56 230763 0 223250 110 3 107 107 0 8 0 pdppl 4096 21581 0 21510 227 154 73 81 0 8 2 pvpl 32 4739297 0 4716469 305 113 192 262 0 265 3 pmappl 248 10786 0 10753 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1207 0 366 25 0 25 25 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace igmp_leavegroup(ffff800000c3c000) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c3c000) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff8000006c6a50) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f67a138) at in_pcbdetach+0xfc sys/netinet/in_pcb.c:585 udp_detach(fffffd807c21b1f8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1258 soclose(fffffd807c21b1f8,0) at soclose+0x255 sys/kern/uipc_socket.c:351 soo_close(fffffd8067c87140,ffff8000246aafd0) at soo_close+0x40 fdrop(fffffd8067c87140,ffff8000246aafd0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8067c87140,ffff8000246aafd0) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000246aafd0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000246aafd0,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000246aafd0,ffff800026312020,ffff800026312080) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000263120f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000263120f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffaed0, count: -14 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(ffffffff829cc458) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829cc458) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002e3823f0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002e3823f0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0c90, count: 9 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(ffffffff829cc458) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829cc458) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002e3823f0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002e3823f0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0c90, count: -6