kernel: protection fault trap, code=0 Stopped at bpfdetach+0x70: movq 0(%r15),%r12 ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace bpfdetach(ffff800001489800) at bpfdetach+0x70 sys/net/bpf.c:1770 if_detach(ffff800001489800) at if_detach+0x1bb sys/net/if.c:1226 tun_clone_destroy(ffff800001489800) at tun_clone_destroy+0x2ce sys/net/if_tun.c:340 if_clone_destroy(ffff80003a00f700) at if_clone_destroy+0x1d5 sys/net/if.c:1415 ifioctl(ffff80000149d798,80206979,ffff80003a00f700,ffff80003a009a10) at ifioctl+0x59d sys/net/if.c:2092 sys_ioctl(ffff80003a009a10,ffff80003a00f8e0,ffff80003a00f830) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003a00f8e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a00f8e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb9ac85302d0, count: -8 ddb{1}> show registers rdi 0xffff8000313e2000 rsi 0x17d59 acpi_pdirpa+0x3bca rbp 0xffff80003a00f520 rbx 0x80206979 __kernel_virt_to_phys+0x206979 rdx 0xffff8000313e2000 rcx 0x17d58 acpi_pdirpa+0x3bc9 rax 0xffffffff81804909 bpfdetach+0xb9 r8 0xffffffffffffffff r9 0x1 r10 0x5422f655ac95d513 r11 0xdf874bded119656a r12 0xdead0002dead4110 r13 0xffff800001489e00 r14 0xffff800001489800 r15 0xdead0002dead4110 rip 0xffffffff818048c0 bpfdetach+0x70 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003a00f4f0 ss 0x10 bpfdetach+0x70: movq 0(%r15),%r12 ddb{1}> show proc PROC (syz-executor) tid=417608 pid=26634 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=55, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c422a88,0xffff80003a0094f0 process=0xffff80003c4266a0 user=0xffff80003a00a000, vmspace=0xfffffd8072e9c200 estcpu=5, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66690 406895 97208 0 2 0 syz-executor 66690 118799 97208 0 2 0x4000000 syz-executor 71220 433494 87204 0 7 0 syz-executor 6084 139929 15817 0 2 0 syz-executor 6084 276164 15817 0 2 0x4000000 syz-executor 38666 441686 20724 60929 3 0x90 nanoslp syz-executor 38666 436701 20724 60929 3 0x4000090 sbwait syz-executor 38666 225050 20724 60929 3 0x4000090 fsleep syz-executor 26634 302683 79420 0 3 0x80 nanoslp syz-executor 26634 278173 79420 0 3 0x4000080 sbwait syz-executor *26634 417608 79420 0 7 0x4000000 syz-executor 33739 61449 0 0 3 0x14200 bored sosplice 98685 237357 84560 0 3 0x82 nanoslp syz-executor 97208 220504 84560 0 2 0x3 syz-executor 87204 506335 84560 0 3 0x82 nanoslp syz-executor 15817 27273 84560 0 3 0x82 nanoslp syz-executor 79420 101439 84560 0 3 0x82 nanoslp syz-executor 74539 206474 84560 0 3 0x82 piperd syz-executor 61054 174065 84560 0 3 0x82 piperd syz-executor 20724 386884 84560 0 3 0x82 nanoslp syz-executor 84560 358059 34414 0 2 0x3 syz-executor 34414 416942 90665 0 3 0x10008a sigsusp ksh 90665 442162 35704 0 3 0x98 kqread sshd-session 35704 117546 74210 0 3 0x92 kqread sshd-session 9296 108233 1 0 3 0x100083 ttyin getty 74210 510893 1 0 3 0x88 kqread sshd 27142 264874 87072 74 3 0x1100092 bpf pflogd 87072 17473 1 0 3 0x80 sbwait pflogd 74861 422719 41330 73 3 0x1100090 kqread syslogd 41330 221969 1 0 3 0x100082 sbwait syslogd 75979 122782 1 0 2 0x100001 resolvd 51993 303289 64340 77 2 0x100013 dhcpleased 20241 449923 64340 77 3 0x100092 kqread dhcpleased 64340 233319 1 0 3 0x80 kqread dhcpleased 16227 171807 0 0 3 0x14200 bored smr 97972 521258 0 0 2 0x14200 zerothread 27837 91089 0 0 3 0x14200 aiodoned aiodoned 61303 45227 0 0 3 0x14200 syncer update 32990 344391 0 0 3 0x14200 cleaner cleaner 8228 387422 0 0 3 0x14200 reaper reaper 67115 18580 0 0 3 0x14200 pgdaemon pagedaemon 83503 274131 0 0 3 0x14200 bored viomb 57236 350770 0 0 3 0x40014200 acpi0 acpi0 95603 221692 0 0 3 0x40014200 idle1 22314 48013 0 0 3 0x14200 bored softnet1 14331 264600 0 0 3 0x14200 bored softnet0 41062 397851 0 0 3 0x14200 bored systqmp 20029 410023 0 0 3 0x14200 bored systq 98217 498952 0 0 3 0x14200 tmoslp softclockmp 65078 46110 0 0 3 0x40014200 tmoslp softclock 71887 209820 0 0 3 0x40014200 idle0 1 51250 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 26634 (syz-executor) thread 0xffff80003a009a10 (417608) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8390bf70) #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 (0xffffffff8385b148) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 11096K 11162K 166960K 11321 0 pcb 17 12K 12K 166960K 29 0 rtable 210 7K 7K 166960K 263 0 pf 37 18K 18K 166960K 52 0 ifaddr 44 7K 7K 166960K 48 0 ifgroup 57 2K 2K 166960K 61 0 sysctl 3 1K 9K 166960K 8 0 counters 72 37K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1493 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1338 84K 85K 166960K 1388 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 178 0 sigio 0 0K 0K 166960K 3 0 proc 71 115K 180K 166960K 535 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 10 0 in_multi 99 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 368 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 226 175K 194K 166960K 3332 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 41 82K 104K 166960K 1266 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 13 0K 1K 166960K 31 0 temp 36 8638K 8706K 166960K 5713 0 kqueue 13 20K 28K 166960K 29 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 36 0 33 1 0 1 1 0 8 0 rtentry 176 95 0 1 5 0 5 5 0 8 0 unpcb 144 99 0 76 2 0 2 2 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 24 0 19 1 0 1 1 0 8 0 arp 136 10 0 0 1 0 1 1 0 8 0 inpcb 328 106 0 97 2 0 2 2 0 8 1 nd6 144 16 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 6 0 4 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 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 15 0 0 1 0 1 1 0 8 0 pfstkey 128 15 0 0 1 0 1 1 0 8 0 pfstate 384 15 0 0 2 0 2 2 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 437 0 0 28 0 28 28 0 8 0 art_table 40 438 0 0 5 0 5 5 0 8 0 art_node 32 95 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 3 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1636 0 123 95 0 95 95 0 8 0 ffsino 296 1636 0 123 117 0 117 117 0 8 0 nchpl 144 1881 0 194 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 1739 0 0 36 0 36 36 0 8 0 vnodes 216 1739 0 0 97 0 97 97 0 8 0 namei 1024 5823 0 5823 5 3 2 2 0 8 2 percpumem 16 55 0 4 1 0 1 1 0 8 0 kstatmem 264 32 0 4 2 0 2 2 0 8 0 scxspl 216 6892 0 6891 11 10 1 8 1 8 0 plimitpl 152 35 0 17 1 0 1 1 0 8 0 sigapl 424 478 0 431 7 1 6 7 0 8 0 knotepl 120 546 0 0 17 0 17 17 0 8 0 kqueuepl 224 38 0 29 1 0 1 1 0 8 0 pipepl 344 108 0 81 4 1 3 3 0 8 0 fdescpl 528 461 0 431 3 0 3 3 0 8 0 filepl 160 1728 0 1508 11 0 11 11 0 8 1 lockfpl 104 27 0 24 1 0 1 1 0 8 0 lockfspl 48 14 0 11 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 125 0 111 1 0 1 1 0 8 0 zombiepl 144 469 0 468 3 2 1 1 0 8 0 processpl 1232 478 0 431 5 0 5 5 0 8 0 procpl 664 577 0 524 6 0 6 6 0 8 0 sockpl 752 244 0 209 6 0 6 6 0 8 2 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 139 0 0 9 0 9 9 0 8 0 bufpl 280 2955 0 122 203 0 203 203 0 8 0 anonpl 32 3964 0 0 32 0 32 32 0 246 0 amapchunkpl 152 9765 0 9329 32 10 22 25 0 158 0 amappl16 200 1813 0 1778 5 3 2 5 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 113 0 101 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 1123 0 1094 4 1 3 3 0 8 0 amappl11 160 97 0 83 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 258 0 257 1 0 1 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 106 0 94 1 0 1 1 0 8 0 amappl6 120 172 0 169 2 1 1 1 0 8 0 amappl5 112 122 0 113 1 0 1 1 0 8 0 amappl4 104 292 0 275 1 0 1 1 0 8 0 amappl3 96 1498 0 1412 4 1 3 3 0 8 0 amappl2 88 682 0 608 2 0 2 2 0 8 0 amappl1 80 8458 0 7864 15 1 14 15 0 8 1 amappl 88 2649 0 2498 5 0 5 5 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 461 0 431 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 461 0 431 1 0 1 1 0 8 0 vmmpekpl 168 5422 0 5386 2 0 2 2 0 8 0 vmmpepl 168 36145 0 34261 94 5 89 89 0 357 0 vmsppl 488 460 0 431 5 0 5 5 0 8 1 rwobjpl 80 14555 0 11905 57 1 56 56 0 8 0 pdppl 4096 930 0 862 114 42 72 88 0 8 4 pvpl 32 11084 0 0 90 1 89 89 0 265 0 pmappl 256 460 0 431 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 284 0 48 7 0 7 7 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83821ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff8390bd68) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8390bd68) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff800039c00cc0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc sys_mmap(ffff8000fffee7e0,ffff800039c00ff0,ffff800039c00f40) at sys_mmap+0x63b sys/uvm/uvm_mmap.c:292 syscall(ffff800039c00ff0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039c00ff0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72ab506bbb80, count: -11 ddb{0}> machine ddbcpu 1 Stopped at bpfdetach+0x70: movq 0(%r15),%r12 ddb{1}> trace bpfdetach(ffff800001489800) at bpfdetach+0x70 sys/net/bpf.c:1770 if_detach(ffff800001489800) at if_detach+0x1bb sys/net/if.c:1226 tun_clone_destroy(ffff800001489800) at tun_clone_destroy+0x2ce sys/net/if_tun.c:340 if_clone_destroy(ffff80003a00f700) at if_clone_destroy+0x1d5 sys/net/if.c:1415 ifioctl(ffff80000149d798,80206979,ffff80003a00f700,ffff80003a009a10) at ifioctl+0x59d sys/net/if.c:2092 sys_ioctl(ffff80003a009a10,ffff80003a00f8e0,ffff80003a00f830) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003a00f8e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a00f8e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb9ac85302d0, count: -8