kernel: protection fault trap, code=0 Stopped at bpfdetach+0x70: movq 0(%r15),%r12 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace bpfdetach(ffff80000148d000) at bpfdetach+0x70 sys/net/bpf.c:1770 if_detach(ffff80000148d000) at if_detach+0x1bb sys/net/if.c:1226 tun_clone_destroy(ffff80000148d000) at tun_clone_destroy+0x2ce sys/net/if_tun.c:340 if_clone_destroy(ffff80002ffd8b60) at if_clone_destroy+0x1d5 sys/net/if.c:1415 ifioctl(ffff800010fde308,80206979,ffff80002ffd8b60,ffff8000357f2a90) at ifioctl+0x59d sys/net/if.c:2092 sys_ioctl(ffff8000357f2a90,ffff80002ffd8d40,ffff80002ffd8c90) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002ffd8d40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ffd8d40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdd2b9548420, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002ffd8980 rbx 0x80206979 __kernel_virt_to_phys+0x206979 rdx 0 rcx 0xffff8000357f2a90 rax 0xffffffff837efff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0 r10 0xb9e28d2c4c540193 r11 0xe7695aa2bc51b3fa r12 0xdeaf0002deafbead r13 0xffff80000148d600 r14 0xffff80000148d000 r15 0xdeaf0002deafbead rip 0xffffffff81bce8f0 bpfdetach+0x70 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002ffd8950 ss 0x10 bpfdetach+0x70: movq 0(%r15),%r12 ddb{0}> show proc PROC (syz-executor) tid=229642 pid=65811 tcnt=4 stat=onproc flags process=2000 proc=4080000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000357f2fc0 scnt=1 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000357f2fc0,0xffff8000357f3cc8 process=0xffff8000fffece88 user=0xffff80002ffd3000, vmspace=0xfffffd8072fb9d70 estcpu=32, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46300 288706 90673 0 2 0 syz-executor 32180 220008 64445 0 2 0 syz-executor 32180 440009 64445 0 3 0x4000080 fsleep syz-executor 52557 472944 29005 0 2 0 syz-executor 52557 188062 29005 0 2 0x4000000 syz-executor 58564 498194 35762 0 2 0 syz-executor 58564 387202 35762 0 3 0x4000080 fsleep syz-executor 58564 114533 35762 0 3 0x4000080 fsleep syz-executor 65811 421280 76621 0 4 0x82000 syz-executor 65811 56829 76621 0 3 0x4002000 suspend syz-executor *65811 229642 76621 0 7 0x4082000 syz-executor 65811 380677 76621 0 4 0x4082000 syz-executor 78825 242168 60809 0 3 0x80 nanoslp syz-executor 78825 44411 60809 0 3 0x4000080 sbwait syz-executor 78825 467998 60809 0 3 0x4000080 fsleep syz-executor 84073 175078 60980 0 3 0x82 wait syz-executor 9409 202260 60980 0 3 0x82 nanoslp syz-executor 76621 73199 60980 0 3 0x82 nanoslp syz-executor 29005 401222 60980 0 3 0x82 nanoslp syz-executor 35762 427921 60980 0 3 0x82 nanoslp syz-executor 64445 396734 60980 0 3 0x82 nanoslp syz-executor 90673 163354 60980 0 3 0x82 nanoslp syz-executor 60809 71217 60980 0 3 0x82 nanoslp syz-executor 60980 419293 87290 0 3 0x82 kqread syz-executor 87290 27001 53800 0 3 0x10008a sigsusp ksh 53800 220013 57938 0 3 0x98 kqread sshd-session 57938 36853 43960 0 3 0x92 kqread sshd-session 84786 144041 1 0 3 0x100083 ttyin getty 43960 28693 1 0 3 0x88 kqread sshd 63993 370957 32356 74 3 0x1100092 bpf pflogd 32356 310880 1 0 3 0x80 sbwait pflogd 36404 252988 81281 73 3 0x1100090 kqread syslogd 81281 241070 1 0 3 0x100082 sbwait syslogd 60090 522584 1 0 3 0x100080 kqread resolvd 78796 185159 29841 77 3 0x100092 kqread dhcpleased 51565 24187 29841 77 3 0x100092 kqread dhcpleased 29841 248186 1 0 3 0x80 kqread dhcpleased 15985 439425 0 0 3 0x14200 bored smr 21292 443534 0 0 2 0x14200 zerothread 84735 268479 0 0 3 0x14200 aiodoned aiodoned 28371 91593 0 0 3 0x14200 syncer update 24836 270734 0 0 3 0x14200 cleaner cleaner 36459 459853 0 0 7 0x14200 reaper 82861 121138 0 0 3 0x14200 pgdaemon pagedaemon 49613 154068 0 0 3 0x14200 bored viomb 91309 146646 0 0 3 0x40014200 acpi0 acpi0 86295 204574 0 0 3 0x40014200 idle1 15623 39878 0 0 3 0x14200 bored softnet1 75513 140479 0 0 3 0x14200 bored softnet0 31921 246851 0 0 3 0x14200 bored systqmp 56083 347676 0 0 3 0x14200 bored systq 79501 260415 0 0 3 0x14200 tmoslp softclockmp 42729 477240 0 0 3 0x40014200 tmoslp softclock 68846 462587 0 0 3 0x40014200 idle0 1 452451 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 65811 (syz-executor) thread 0xffff8000357f2a90 (229642) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83915fc0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:367 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 lf_purgelocks+0x2f sys/kern/vfs_lockf.c:731 #5 vgonel+0x47e sys/kern/vfs_subr.c:1223 #6 vop_generic_revoke+0x3ea sys/kern/vfs_default.c:124 #7 VOP_REVOKE+0x65 sys/kern/vfs_vops.c:291 #8 vdevgone+0x17b sys/kern/vfs_subr.c:-1 #9 bpfsdetach+0x155 sys/net/bpf.c:1794 #10 bpfdetach+0xa6 sys/net/bpf.c:-1 #11 if_detach+0x1bb sys/net/if.c:1226 #12 tun_clone_destroy+0x2ce sys/net/if_tun.c:340 #13 if_clone_destroy+0x1d5 sys/net/if.c:1415 #14 ifioctl+0x59d sys/net/if.c:2092 #15 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #16 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #16 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #17 Xsyscall+0x128 exclusive rwlock clonelk r = 0 (0xffffffff837bee88) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 if_clone_destroy+0x67 sys/net/if.c:-1 #3 ifioctl+0x59d sys/net/if.c:2092 #4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11161K 11287K 166960K 11478 0 pcb 18 13K 13K 166960K 48 0 rtable 223 7K 8K 166960K 310 0 pf 34 17K 81K 166960K 76 0 ifaddr 43 7K 8K 166960K 62 0 ifgroup 55 2K 2K 166960K 87 0 sysctl 3 1K 9K 166960K 9 0 counters 68 36K 38K 166960K 114 0 ioctlops 0 0K 4K 166960K 1509 0 iov 0 0K 16K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1338 84K 84K 166960K 1546 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 318 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 164K 166960K 556 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 61 0 in_multi 99 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 386 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 234 159K 173K 166960K 4626 0 UVM aobj 14 2K 2K 166960K 14 0 pinsyscall 42 84K 100K 166960K 1426 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 12 0K 2K 166960K 40 0 temp 43 8643K 8710K 166960K 10345 0 kqueue 15 24K 26K 166960K 52 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 63 0 60 1 0 1 1 0 8 0 rtentry 176 102 0 4 5 0 5 5 0 8 0 unpcb 144 147 0 126 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 45 0 40 1 0 1 1 0 8 0 arp 136 10 0 0 1 0 1 1 0 8 0 inpcb 328 218 0 208 5 1 4 4 0 8 3 nd6 152 18 0 0 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 1 1 1 0 8 1 ppxss 1192 20 0 20 2 1 1 1 0 8 1 pppxif 1504 3 0 3 2 1 1 1 0 8 1 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 41 0 38 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 pfstitem 24 27 0 1 1 0 1 1 0 8 0 pfstkey 128 27 0 1 1 0 1 1 0 8 0 pfstate 384 27 0 1 3 0 3 3 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 452 0 12 28 0 28 28 0 8 0 art_table 40 454 0 12 5 0 5 5 0 8 0 art_node 32 102 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 10 0 2 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1977 0 465 95 0 95 95 0 8 0 ffsino 296 1977 0 465 117 0 117 117 0 8 0 nchpl 144 2403 0 710 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 2122 0 0 44 0 44 44 0 8 0 vnodes 216 2122 0 0 118 0 118 118 0 8 0 namei 1024 7545 0 7545 2 1 1 2 0 8 1 percpumem 16 72 0 23 1 0 1 1 0 8 0 kstatmem 264 50 0 24 3 1 2 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 8131 0 8131 2 1 1 2 1 8 1 plimitpl 152 58 0 40 1 0 1 1 0 8 0 sigapl 424 623 0 575 7 1 6 7 0 8 0 knotepl 120 310 0 0 10 0 10 10 0 8 0 kqueuepl 224 148 0 136 5 0 5 5 0 8 4 pipepl 344 119 0 91 3 0 3 3 0 8 0 fdescpl 528 607 0 576 3 0 3 3 0 8 0 filepl 160 2804 0 2582 16 1 15 15 0 8 5 lockfpl 104 80 0 78 1 0 1 1 0 8 0 lockfspl 48 37 0 35 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 448 0 433 1 0 1 1 0 8 0 zombiepl 144 665 0 663 2 1 1 1 0 8 0 processpl 1232 623 0 575 5 1 4 5 0 8 0 procpl 664 953 0 896 7 1 6 6 0 8 0 sockpl 752 436 0 402 9 1 8 8 0 8 4 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 151 0 0 10 0 10 10 0 8 0 bufpl 280 4382 0 124 305 0 305 305 0 8 0 anonpl 32 7386 0 0 60 0 60 60 0 246 0 amapchunkpl 152 14322 0 13849 38 4 34 34 0 158 12 amappl16 200 2143 0 2119 16 3 13 14 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 139 0 127 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1288 0 1258 4 1 3 3 0 8 0 amappl11 160 75 0 61 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 109 0 97 1 0 1 1 0 8 0 amappl6 120 178 0 175 1 0 1 1 0 8 0 amappl5 112 123 0 113 1 0 1 1 0 8 0 amappl4 104 297 0 279 1 0 1 1 0 8 0 amappl3 96 2385 0 2294 3 0 3 3 0 8 0 amappl2 88 841 0 765 2 0 2 2 0 8 0 amappl1 80 9016 0 8422 14 1 13 14 0 8 0 amappl 88 3897 0 3736 5 0 5 5 0 92 1 dma16384 16384 1 0 1 1 0 1 1 0 8 1 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 607 0 576 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 607 0 576 1 0 1 1 0 8 0 vmmpekpl 168 6410 0 6374 3 0 3 3 0 8 0 vmmpepl 168 44588 0 42642 97 2 95 95 0 357 7 vmsppl 488 606 0 576 5 1 4 5 0 8 0 rwobjpl 80 16848 0 13802 65 0 65 65 0 8 1 pdppl 4096 1222 0 1152 98 26 72 84 0 8 2 pvpl 32 13773 0 0 113 1 112 112 0 265 0 pmappl 256 606 0 576 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 272 0 31 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace bpfdetach(ffff80000148d000) at bpfdetach+0x70 sys/net/bpf.c:1770 if_detach(ffff80000148d000) at if_detach+0x1bb sys/net/if.c:1226 tun_clone_destroy(ffff80000148d000) at tun_clone_destroy+0x2ce sys/net/if_tun.c:340 if_clone_destroy(ffff80002ffd8b60) at if_clone_destroy+0x1d5 sys/net/if.c:1415 ifioctl(ffff800010fde308,80206979,ffff80002ffd8b60,ffff8000357f2a90) at ifioctl+0x59d sys/net/if.c:2092 sys_ioctl(ffff8000357f2a90,ffff80002ffd8d40,ffff80002ffd8c90) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002ffd8d40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ffd8d40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdd2b9548420, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 reaper(ffff8000ffffd9f8) at reaper+0x1f1 sys/kern/kern_exit.c:505 end trace frame: 0x0, count: -5