uvm_fault(0xfffffd806bc0aaa0, 0x3fff7ee000b, 0, 1) -> e kernel: page fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xfffffd806bc0aaa0, 0x3fff7ee000b, 0, 1) -> e in_delmulti(3fff7edffff) at in_delmulti+0x8d sys/netinet/in.c:914 end trace frame: 0xffff80001d7b9040, count: 0 ddb> trace in_delmulti(3fff7edffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b39400) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6800) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:326 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001d7b9220) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8065108a90,7,fffffd806c3bf780,ffff80001d6a9008) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80574708f8,ffff80001d6a9008) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80574708f8,ffff80001d6a9008) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80574708f8,ffff80001d6a9008) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80574708f8,ffff80001d6a9008) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6a9008) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6a9008,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6a9008,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6a9008,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6a9008) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d7b96a0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d7b96a0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8640, count: -17 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80001d7b8ff0 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffffffff815fff63 rt_ifa_purge+0x153 r9 0x5 r10 0xaf5b1ecd284ec098 r11 0x731e4362d98e416a r12 0 r13 0x3 r14 0x3fff7edffff r15 0x1 rip 0xffffffff819a982d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d7b8f90 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.0) pid=137094 stat=onproc flags process=a proc=2000 pri=32, usrpri=64, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6a9ea8,0xffff80001d6aa398 process=0xffff80001d6c43b0 user=0xffff80001d7b4000, vmspace=0xfffffd806bc0aaa0 estcpu=14, cpticks=0, pctcpu=0.1 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 17541 196374 0 0 3 0x14200 bored sosplice 90045 366616 86008 0 2 0x2 syz-executor.1 86008 198969 10554 0 3 0x82 thrsleep syz-fuzzer 86008 177868 10554 0 2 0x4000082 syz-fuzzer 86008 508453 10554 0 3 0x4000082 thrsleep syz-fuzzer 86008 454496 10554 0 3 0x4000082 thrsleep syz-fuzzer 86008 400342 10554 0 3 0x4000082 thrsleep syz-fuzzer 86008 415400 10554 0 2 0x4000002 syz-fuzzer 86008 162863 10554 0 3 0x4000082 thrsleep syz-fuzzer 86008 224039 10554 0 3 0x4000082 thrsleep syz-fuzzer 10554 148021 40205 0 3 0x10008a pause ksh 40205 500774 63546 0 3 0x92 select sshd 28833 271623 1 0 3 0x100083 ttyin getty 63546 15218 1 0 3 0x80 select sshd 46103 46886 59686 73 3 0x100090 kqread syslogd 59686 509050 1 0 3 0x100082 netio syslogd 58399 4966 1 77 2 0x100090 dhclient 33492 348409 1 0 3 0x80 poll dhclient 28438 192676 0 0 3 0x14200 bored smr 81773 453583 0 0 2 0x14200 zerothread 48965 320611 0 0 3 0x14200 aiodoned aiodoned 7971 388206 0 0 3 0x14200 syncer update 45836 251957 0 0 3 0x14200 cleaner cleaner 58409 307928 0 0 3 0x14200 reaper reaper 71117 105398 0 0 3 0x14200 pgdaemon pagedaemon 53431 499989 0 0 3 0x14200 bored crynlk 85608 166813 0 0 3 0x14200 bored crypto 96846 41395 0 0 3 0x40014200 acpi0 acpi0 29736 491730 0 0 3 0x14200 bored softnet 85959 497870 0 0 2 0x14200 systqmp 37052 268699 0 0 3 0x14200 bored systq 70702 251735 0 0 3 0x40014200 bored softclock 46596 119235 0 0 3 0x40014200 idle0 1 317912 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9480 6337K 7103K 78643K 11827 0 pcb 13 8K 8K 78643K 135 0 rtable 112 14K 18K 78643K 506 0 ifaddr 67 14K 15K 78643K 142 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 26 0 ioctlops 0 0K 4K 78643K 165 0 iov 0 0K 12K 78643K 30 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 1540 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 78 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 369 0 sigio 0 0K 0K 78643K 8 0 proc 51 38K 63K 78643K 379 0 subproc 23 1K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 92 0 in_multi 51 2K 3K 78643K 122 0 ether_multi 1 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 199 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 127 39K 40K 78643K 1730 0 UVM aobj 7 2K 2K 78643K 9 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 43 0 NDP 10 0K 0K 78643K 25 0 temp 115 3868K 3932K 78643K 6080 0 kqueue 3 4K 16K 78643K 19 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 9 0 6 1 0 1 1 0 8 0 rtpcb 80 31 0 29 1 0 1 1 0 8 0 rtentry 112 69 0 32 2 0 2 2 0 8 0 unpcb 120 129 0 121 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 93 0 93 2 1 1 1 0 8 1 tcpcb 544 318 0 303 5 2 3 3 0 8 2 inpcb 296 734 0 727 3 1 2 2 0 8 1 nd6 48 13 0 7 1 0 1 1 0 8 0 ppxss 1136 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pfrktable 1344 96 0 90 3 1 2 2 0 8 1 pftag 88 14 0 12 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 4 0 2 1 0 1 1 0 8 0 pfstate 328 2 0 1 1 0 1 1 0 8 0 pfrule 1360 28 0 22 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 334 0 81 17 1 16 16 0 8 0 art_table 32 335 0 81 3 0 3 3 0 8 0 art_node 16 68 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 21 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 72 0 62 1 0 1 1 0 8 0 shmpl 112 6 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1834 0 435 88 0 88 88 0 8 0 ffsino 240 1834 0 435 83 0 83 83 0 8 0 nchpl 144 2555 0 961 60 0 60 60 0 8 0 uvmvnodes 72 2163 0 0 40 0 40 40 0 8 0 vnodes 208 2163 0 0 114 0 114 114 0 8 0 namei 1024 6808 0 6808 2 1 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 528 8 0 6 1 0 1 1 0 8 0 pfiaddrpl 120 32 0 24 1 0 1 1 0 8 0 scxspl 192 7616 0 7616 1 0 1 1 0 8 1 plimitpl 152 44 0 37 1 0 1 1 0 8 0 sigapl 424 556 0 528 4 0 4 4 0 8 0 futexpl 56 8270 0 8270 2 1 1 1 0 8 1 knotepl 112 81 0 64 1 0 1 1 0 8 0 kqueuepl 144 54 0 52 1 0 1 1 0 8 0 pipepl 272 136 0 127 2 0 2 2 0 8 1 fdescpl 432 541 0 528 2 0 2 2 0 8 0 filepl 120 3385 0 3301 5 0 5 5 0 8 2 lockfpl 104 75 0 74 1 0 1 1 0 8 0 lockfspl 48 29 0 28 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 321 0 314 1 0 1 1 0 8 0 zombiepl 144 529 0 528 1 0 1 1 0 8 0 processpl 928 556 0 528 4 0 4 4 0 8 0 procpl 624 981 0 946 4 0 4 4 0 8 1 sosppl 128 4 0 4 1 1 0 1 0 8 0 sockpl 400 896 0 879 5 1 4 4 0 8 2 mcl64k 65536 250 0 250 30 25 5 29 0 8 5 mcl16k 16384 7 0 7 3 2 1 1 0 8 1 mcl12k 12288 8 0 8 2 1 1 1 0 8 1 mcl9k 9216 4 0 4 1 0 1 1 0 8 1 mcl8k 8192 18 0 18 2 1 1 1 0 8 1 mcl4k 4096 51 0 51 3 2 1 1 0 8 1 mcl2k2 2112 6 0 6 2 1 1 1 0 8 1 mcl2k 2048 95090 0 95046 17 9 8 13 0 8 2 mtagpl 96 56 0 43 2 1 1 1 0 8 0 mbufpl 256 153138 0 153023 29 10 19 27 0 8 8 bufpl 280 3995 0 130 277 0 277 277 0 8 0 anonpl 16 82137 0 65622 93 6 87 87 0 107 16 amapchunkpl 152 3195 0 3067 14 3 11 11 0 158 4 amappl16 192 2853 0 1892 62 5 57 57 0 8 8 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 25 0 22 1 0 1 1 0 8 0 amappl13 168 187 0 183 1 0 1 1 0 8 0 amappl12 160 184 0 182 2 1 1 1 0 8 0 amappl11 152 57 0 47 1 0 1 1 0 8 0 amappl10 144 27 0 21 1 0 1 1 0 8 0 amappl9 136 372 0 371 1 0 1 1 0 8 0 amappl8 128 341 0 296 2 0 2 2 0 8 0 amappl7 120 109 0 96 1 0 1 1 0 8 0 amappl6 112 26 0 19 1 0 1 1 0 8 0 amappl5 104 656 0 646 1 0 1 1 0 8 0 amappl4 96 591 0 561 1 0 1 1 0 8 0 amappl3 88 113 0 107 1 0 1 1 0 8 0 amappl2 80 3518 0 3461 2 0 2 2 0 8 0 amappl1 72 20998 0 20604 22 13 9 17 0 8 0 amappl 80 1241 0 1200 3 1 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 8 0 2 1 0 1 1 0 8 0 uaddrrnd 24 549 0 534 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 549 0 534 1 0 1 1 0 8 0 vmmpekpl 168 7414 0 7385 2 0 2 2 0 8 0 vmmpepl 168 73034 0 71075 156 32 124 150 0 357 33 vmsppl 272 548 0 534 3 1 2 2 0 8 0 pdppl 4096 1104 0 1070 6 1 5 6 0 8 0 pvpl 32 221457 0 202049 211 7 204 204 0 265 39 pmappl 200 548 0 534 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 306 0 58 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace in_delmulti(3fff7edffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b39400) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6800) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:326 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001d7b9220) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8065108a90,7,fffffd806c3bf780,ffff80001d6a9008) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80574708f8,ffff80001d6a9008) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80574708f8,ffff80001d6a9008) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80574708f8,ffff80001d6a9008) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80574708f8,ffff80001d6a9008) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6a9008) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6a9008,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6a9008,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6a9008,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6a9008) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d7b96a0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d7b96a0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8640, count: -17 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(3fff7edffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b39400) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6800) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:326 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001d7b9220) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8065108a90,7,fffffd806c3bf780,ffff80001d6a9008) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80574708f8,ffff80001d6a9008) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80574708f8,ffff80001d6a9008) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80574708f8,ffff80001d6a9008) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80574708f8,ffff80001d6a9008) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6a9008) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6a9008,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6a9008,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6a9008,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6a9008) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d7b96a0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d7b96a0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8640, count: -17