kernel: protection fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace in_delmulti(fbeffffff7ffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b47800) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000b39800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000b39800) at if_detach+0x140 sys/net/if.c:1032 tun_clone_destroy(ffff800000b39800) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:326 ifioctl(fffffd806fae0330,80206979,ffff800023100920,ffff800020eb3650) at ifioctl+0x3ea sys/net/if.c:1821 soo_ioctl(fffffd806cabfee8,80206979,ffff800023100920,ffff800020eb3650) at soo_ioctl+0x27c sys/kern/sys_socket.c:138 sys_ioctl(ffff800020eb3650,ffff800023100a38,ffff800023100a80) at sys_ioctl+0x4a5 syscall(ffff800023100b00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023100b00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a99b2f120, count: -10 ddb{1}> show registers rdi 0xffff8000218e9000 rsi 0x2e62d acpi_pdirpa+0x1a495 rbp 0xffff800023100690 rbx 0 rdx 0xffff8000218e9000 rcx 0x2e62c acpi_pdirpa+0x1a494 rax 0xffffffff823bf7bd in_delmulti+0x8d r8 0xffff800000b47800 r9 0xffffffff81e56833 rt_ifa_purge+0x153 r10 0x5 r11 0x6f56b08e3d66cfa0 r12 0 r13 0x3 r14 0xfbeffffff7ffffff r15 0x1 rip 0xffffffff823bf7bd in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800023100630 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.0) pid=52741 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff800020eb2018,0xffff800020eaec90 process=0xffff800020eb0bd0 user=0xffff8000230fb000, vmspace=0xfffffd806e902e68 estcpu=23, cpticks=1, pctcpu=0.1 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85846 394619 62391 0 2 0 syz-executor.1 85846 226830 62391 0 2 0x4000000 syz-executor.1 19215 86621 90283 0 2 0 syz-executor.0 *19215 52741 90283 0 7 0x4000000 syz-executor.0 90283 96831 89746 0 2 0x2 syz-executor.0 68514 409621 0 0 3 0x14280 nfsidl nfsio 42797 435021 0 0 3 0x14280 nfsidl nfsio 36484 482326 0 0 3 0x14280 nfsidl nfsio 60754 299749 0 0 3 0x14280 nfsidl nfsio 54862 14618 0 0 3 0x14280 nfsidl nfsio 63899 173033 0 0 3 0x14280 nfsidl nfsio 66353 112049 0 0 3 0x14280 nfsidl nfsio 28870 5725 0 0 3 0x14280 nfsidl nfsio 48007 125602 0 0 3 0x14280 nfsidl nfsio 8372 439981 0 0 3 0x14280 nfsidl nfsio 54625 459524 0 0 3 0x14280 nfsidl nfsio 69929 218947 0 0 3 0x14280 nfsidl nfsio 89476 207675 0 0 3 0x14280 nfsidl nfsio 16294 436633 0 0 3 0x14280 nfsidl nfsio 74384 86696 0 0 3 0x14280 nfsidl nfsio 51904 474412 0 0 3 0x14280 nfsidl nfsio 58380 407990 0 0 3 0x14280 nfsidl nfsio 41032 196223 0 0 3 0x14280 nfsidl nfsio 57663 5774 0 0 3 0x14280 nfsidl nfsio 85290 460432 0 0 3 0x14280 nfsidl nfsio 8867 182445 0 0 3 0x14200 bored sosplice 62391 254748 89746 0 2 0x482 syz-executor.1 89746 251251 36121 0 3 0x82 kqread syz-fuzzer 89746 475010 36121 0 3 0x4000082 nanosleep syz-fuzzer 89746 60834 36121 0 7 0x4000002 syz-fuzzer 89746 265301 36121 0 3 0x4000082 thrsleep syz-fuzzer 89746 24412 36121 0 3 0x4000082 thrsleep syz-fuzzer 89746 252199 36121 0 3 0x4000082 thrsleep syz-fuzzer 89746 416122 36121 0 3 0x4000082 thrsleep syz-fuzzer 89746 138082 36121 0 3 0x4000082 thrsleep syz-fuzzer 36121 38187 50843 0 3 0x10008a pause ksh 50843 98674 44410 0 3 0x92 select sshd 63606 377937 1 0 3 0x100083 ttyin getty 44410 334659 1 0 3 0x80 select sshd 44389 362319 23531 74 3 0x100092 bpf pflogd 23531 506906 1 0 3 0x80 netio pflogd 58734 23781 7107 73 3 0x100090 kqread syslogd 7107 348525 1 0 3 0x100082 netio syslogd 42621 517665 1 77 2 0x100090 dhclient 36198 403559 1 0 3 0x80 poll dhclient 3653 501242 0 0 3 0x14200 bored smr 84249 311961 0 0 2 0x14200 zerothread 58883 116527 0 0 3 0x14200 aiodoned aiodoned 58739 20627 0 0 3 0x14200 syncer update 79712 220479 0 0 3 0x14200 cleaner cleaner 49863 444100 0 0 3 0x14200 reaper reaper 99788 301211 0 0 3 0x14200 pgdaemon pagedaemon 6335 293080 0 0 3 0x14200 bored crynlk 80024 278131 0 0 3 0x14200 bored crypto 43903 271543 0 0 3 0x40014200 acpi0 acpi0 87548 281861 0 0 3 0x40014200 idle1 27465 193358 0 0 3 0x14200 bored softnet 91704 445673 0 0 2 0x14200 systqmp 56450 329965 0 0 3 0x14200 bored systq 21838 215203 0 0 3 0x40014200 bored softclock 57341 510139 0 0 3 0x40014200 idle0 1 37198 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 19215 (syz-executor.0) thread 0xffff800020eb3650 (52741) exclusive rwlock netlock r = 0 (0xffffffff827713e0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 if_detach+0x70 sys/net/if.c:1010 #2 tun_clone_destroy+0x1e1 sys/net/if_tun.c:326 #3 ifioctl+0x3ea sys/net/if.c:1821 #4 soo_ioctl+0x27c sys/kern/sys_socket.c:138 #5 sys_ioctl+0x4a5 #6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #7 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82933348) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:435 #3 sleep_finish+0x113 sys/kern/kern_synch.c:418 #4 cond_wait+0x76 sys/kern/kern_synch.c:907 #5 smr_barrier_impl+0xf9 sys/kern/kern_smr.c:271 #6 tun_clone_destroy+0x136 sys/net/if_tun.c:311 #7 ifioctl+0x3ea sys/net/if.c:1821 #8 soo_ioctl+0x27c sys/kern/sys_socket.c:138 #9 sys_ioctl+0x4a5 #10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #11 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9504 6417K 6669K 78643K 10997 0 pcb 13 8K 8K 78643K 71 0 rtable 110 5K 8K 78643K 452 0 ifaddr 66 14K 15K 78643K 159 0 counters 43 33K 34K 78643K 63 0 ioctlops 0 0K 4K 78643K 1548 0 iov 0 0K 16K 78643K 38 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1346 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 158 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 367 0 sigio 0 0K 0K 78643K 2 0 proc 61 63K 95K 78643K 507 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 1 0K 0K 78643K 415 0 in_multi 61 3K 3K 78643K 135 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 244 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 194 62K 62K 78643K 2220 0 UVM aobj 21 6K 6K 78643K 21 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 36 0 NDP 10 0K 0K 78643K 30 0 temp 109 3872K 3936K 78643K 3401 0 kqueue 3 4K 12K 78643K 17 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 arp 64 12 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 27 0 25 1 0 1 1 0 8 0 rtentry 112 81 0 38 2 0 2 2 0 8 0 unpcb 120 149 0 138 1 0 1 1 0 8 0 syncache 272 6 0 6 2 2 0 1 0 8 0 tcpqe 32 180 0 180 1 1 0 1 0 8 0 tcpcb 592 386 0 381 4 0 4 4 0 8 2 inpcb 296 835 0 825 2 0 2 2 0 8 1 rttmr 72 3 0 3 2 1 1 1 0 8 1 nd6 48 21 0 13 1 0 1 1 0 8 0 ppxss 1136 3 0 3 2 2 0 1 0 8 0 pffrag 232 6 0 6 1 0 1 1 0 482 1 pffrnode 88 6 0 6 1 0 1 1 0 8 1 pffrent 40 102 0 102 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 40 0 38 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 25 0 10 1 0 1 1 0 8 0 pfstkey 112 25 0 10 1 0 1 1 0 8 0 pfstate 328 25 0 10 2 0 2 2 0 8 0 pfrule 1360 32 0 24 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 288 0 87 14 0 14 14 0 8 1 art_table 32 289 0 87 2 0 2 2 0 8 0 art_node 16 80 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 8 1 0 1 1 0 8 0 semapl 112 156 0 146 1 0 1 1 0 8 0 shmpl 112 18 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1824 0 421 89 1 88 89 0 8 0 ffsino 272 1824 0 421 94 0 94 94 0 8 0 nchpl 144 2499 0 905 60 0 60 60 0 8 0 uvmvnodes 72 1963 0 0 36 0 36 36 0 8 0 vnodes 208 1963 0 0 104 0 104 104 0 8 0 namei 1024 6940 0 6940 1 0 1 1 0 8 1 percpumem 16 42 0 10 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 13 0 12 1 0 1 1 0 8 0 scxspl 200 7527 0 7527 8 7 1 7 0 8 1 plimitpl 152 44 0 36 1 0 1 1 0 8 0 sigapl 424 600 0 547 6 0 6 6 0 8 0 futexpl 56 4738 0 4738 1 0 1 1 0 8 1 knotepl 112 91 0 71 1 0 1 1 0 8 0 kqueuepl 152 35 0 32 1 0 1 1 0 8 0 pipepl 304 123 0 112 2 1 1 2 0 8 0 fdescpl 496 564 0 547 3 0 3 3 0 8 0 filepl 152 3322 0 3216 5 0 5 5 0 8 0 lockfpl 104 78 0 77 1 0 1 1 0 8 0 lockfspl 48 32 0 31 1 0 1 1 0 8 0 sessionpl 120 19 0 8 1 0 1 1 0 8 0 pgrppl 48 23 0 12 1 0 1 1 0 8 0 ucredpl 96 289 0 280 1 0 1 1 0 8 0 zombiepl 144 547 0 547 1 0 1 1 0 8 1 processpl 1008 600 0 547 7 0 7 7 0 8 0 procpl 632 1341 0 1279 6 0 6 6 0 8 0 srpgc 72 3 0 3 1 0 1 1 0 8 1 sosppl 144 2 0 2 1 1 0 1 0 8 0 sockpl 400 1015 0 992 4 0 4 4 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 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 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 171 0 0 21 0 21 21 0 8 0 mtagpl 96 23 0 0 1 0 1 1 0 8 0 mbufpl 256 284 0 0 16 0 16 16 0 8 0 bufpl 280 4075 0 127 282 0 282 282 0 8 0 anonpl 16 79456 0 58025 94 7 87 87 0 124 0 amapchunkpl 152 4294 0 3941 29 10 19 28 0 158 4 amappl16 192 2548 0 1450 55 0 55 55 0 8 0 amappl15 184 33 0 29 1 0 1 1 0 8 0 amappl14 176 4 0 2 1 0 1 1 0 8 0 amappl13 168 45 0 41 1 0 1 1 0 8 0 amappl12 160 24 0 18 1 0 1 1 0 8 0 amappl11 152 57 0 42 1 0 1 1 0 8 0 amappl10 144 185 0 178 1 0 1 1 0 8 0 amappl9 136 520 0 517 1 0 1 1 0 8 0 amappl8 128 576 0 508 3 0 3 3 0 8 0 amappl7 120 266 0 250 1 0 1 1 0 8 0 amappl6 112 32 0 26 1 0 1 1 0 8 0 amappl5 104 459 0 440 1 0 1 1 0 8 0 amappl4 96 505 0 480 1 0 1 1 0 8 0 amappl3 88 122 0 114 1 0 1 1 0 8 0 amappl2 80 3533 0 3452 2 0 2 2 0 8 0 amappl1 72 25801 0 25343 23 13 10 18 0 8 0 amappl 80 1645 0 1550 3 0 3 3 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 20 0 0 1 0 1 1 0 8 0 uaddrrnd 24 568 0 547 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 568 0 547 1 0 1 1 0 8 0 vmmpekpl 168 8066 0 8019 3 0 3 3 0 8 0 vmmpepl 168 80024 0 77560 148 19 129 129 0 357 21 vmsppl 368 567 0 547 2 0 2 2 0 8 0 pdppl 4096 1143 0 1098 6 0 6 6 0 8 0 pvpl 32 240434 0 215653 206 6 200 201 0 265 0 pmappl 232 567 0 547 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 262 0 6 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82785ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(aca9b,aca9c) at __sanitizer_cov_trace_cmp4+0x40 kd_curproc sys/dev/kcov.c:454 [inline] __sanitizer_cov_trace_cmp4(aca9b,aca9c) at __sanitizer_cov_trace_cmp4+0x40 trace_cmp sys/dev/kcov.c:134 [inline] __sanitizer_cov_trace_cmp4(aca9b,aca9c) at __sanitizer_cov_trace_cmp4+0x40 sys/dev/kcov.c:163 __mp_lock(ffffffff82933140) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82933140) at __mp_lock+0x139 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_cmp4(ffffffff82933140,ffffffff82933140) at __sanitizer_cov_trace_cmp4+0x5a kd_curproc sys/dev/kcov.c:458 [inline] __sanitizer_cov_trace_cmp4(ffffffff82933140,ffffffff82933140) at __sanitizer_cov_trace_cmp4+0x5a trace_cmp sys/dev/kcov.c:134 [inline] __sanitizer_cov_trace_cmp4(ffffffff82933140,ffffffff82933140) at __sanitizer_cov_trace_cmp4+0x5a sys/dev/kcov.c:163 uvm_map_inentry(ffff8000fffff158,ffff8000fffff1b8,c00004feb8,ffffffff8242f62d,ffffffff810c3490,87) at uvm_map_inentry+0xbe sys/uvm/uvm_map.c:1890 syscall(ffff800020e82380) at syscall+0x397 mi_syscall sys/sys/syscall_mi.h:81 [inline] syscall(ffff800020e82380) at syscall+0x397 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004fed0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> trace in_delmulti(fbeffffff7ffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b47800) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000b39800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000b39800) at if_detach+0x140 sys/net/if.c:1032 tun_clone_destroy(ffff800000b39800) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:326 ifioctl(fffffd806fae0330,80206979,ffff800023100920,ffff800020eb3650) at ifioctl+0x3ea sys/net/if.c:1821 soo_ioctl(fffffd806cabfee8,80206979,ffff800023100920,ffff800020eb3650) at soo_ioctl+0x27c sys/kern/sys_socket.c:138 sys_ioctl(ffff800020eb3650,ffff800023100a38,ffff800023100a80) at sys_ioctl+0x4a5 syscall(ffff800023100b00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023100b00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a99b2f120, count: -10