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(ffff80000141d800) at bpfdetach+0x70 sys/net/bpf.c:1770 if_detach(ffff80000141d800) at if_detach+0x1bb sys/net/if.c:1226 tun_clone_destroy(ffff80000141d800) at tun_clone_destroy+0x2ce sys/net/if_tun.c:340 if_clone_destroy(ffff80003c42d260) at if_clone_destroy+0x1d5 sys/net/if.c:1415 ifioctl(ffff8000014cd208,80206979,ffff80003c42d260,ffff8000ffffd9f8) at ifioctl+0x59d sys/net/if.c:2092 sys_ioctl(ffff8000ffffd9f8,ffff80003c42d440,ffff80003c42d390) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c42d440) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42d440) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6540fdeeef0, count: -8 ddb{1}> show registers rdi 0xffff80002ebdc000 rsi 0x148f9 acpi_pdirpa+0x76a rbp 0xffff80003c42d080 rbx 0x80206979 __kernel_virt_to_phys+0x206979 rdx 0xffff80002ebdc000 rcx 0x148f8 acpi_pdirpa+0x769 rax 0xffffffff82a1a529 bpfdetach+0xb9 r8 0 r9 0xffffffffffffffff r10 0x6cd3ced9a7009dcf r11 0x2bf48e2db5224a24 r12 0xdead0002dead4110 r13 0xffff80000141de00 r14 0xffff80000141d800 r15 0xdead0002dead4110 rip 0xffffffff82a1a4e0 bpfdetach+0x70 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c42d050 ss 0x10 bpfdetach+0x70: movq 0(%r15),%r12 ddb{1}> show proc PROC (syz-executor) tid=428629 pid=8956 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4582c0,0xffff80003c458800 process=0xffff80003c439838 user=0xffff80003c428000, vmspace=0xfffffd806b5907c0 estcpu=32, cpticks=1, pctcpu=0.1, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 278 413119 99210 0 7 0 syz-executor 278 500998 99210 0 2 0x4000000 syz-executor 93721 76333 42602 0 2 0 syz-executor 93721 66700 42602 0 3 0x4000080 sbwait syz-executor 93721 146188 42602 0 2 0x4000000 syz-executor 75834 443939 91745 0 2 0 syz-executor 75834 343375 91745 0 3 0x4000080 fsleep syz-executor 75834 414048 91745 0 3 0x4000080 fsleep syz-executor 43333 25748 66741 0 2 0 syz-executor 43333 51669 66741 0 2 0x4000000 syz-executor 43333 382381 66741 0 3 0x4000080 fsleep syz-executor 41386 265959 73912 -1 3 0x90 nanoslp syz-executor 41386 81451 73912 -1 3 0x4000090 kqsel syz-executor 41386 486569 73912 -1 3 0x4000090 fsleep syz-executor 8956 511386 12475 0 3 0x80 nanoslp syz-executor * 8956 428629 12475 0 7 0x4000000 syz-executor 75308 158775 0 0 3 0x14200 acct acct 12475 456946 40877 0 3 0x82 nanoslp syz-executor 63948 397910 0 0 3 0x14200 bored sosplice 15309 357988 1 0 3 0x100083 ttyopn getty 91745 18958 40877 0 3 0x82 nanoslp syz-executor 55977 226941 40877 0 3 0x82 nanoslp syz-executor 66741 324238 40877 0 3 0x82 nanoslp syz-executor 99210 49939 40877 0 3 0x82 nanoslp syz-executor 73912 6596 40877 0 3 0x82 nanoslp syz-executor 3425 143871 40877 0 2 0x2 syz-executor 42602 470953 40877 0 3 0x82 nanoslp syz-executor 40877 456611 9957 0 3 0x82 kqread syz-executor 9957 45191 26985 0 3 0x10008a sigsusp ksh 26985 404323 42047 0 3 0x98 kqread sshd-session 42047 246719 57366 0 3 0x92 kqread sshd-session 57366 200506 1 0 3 0x88 kqread sshd 58243 226603 26149 74 3 0x1100092 bpf pflogd 26149 142754 1 0 3 0x80 sbwait pflogd 33378 260970 18134 73 3 0x1100090 kqread syslogd 18134 268218 1 0 3 0x100082 sbwait syslogd 15977 426285 1 0 3 0x100080 kqread resolvd 17797 279062 7889 77 3 0x100092 kqread dhcpleased 42119 88606 7889 77 3 0x100092 kqread dhcpleased 7889 152415 1 0 3 0x80 kqread dhcpleased 76214 276582 0 0 3 0x14200 bored smr 80412 165380 0 0 2 0x14200 zerothread 8965 109564 0 0 3 0x14200 aiodoned aiodoned 52491 184318 0 0 3 0x14200 syncer update 2380 89217 0 0 3 0x14200 cleaner cleaner 59399 179958 0 0 3 0x14200 reaper reaper 43458 427078 0 0 3 0x14200 pgdaemon pagedaemon 7183 26619 0 0 3 0x14200 bored viomb 73729 328379 0 0 3 0x40014200 acpi0 acpi0 78670 226706 0 0 3 0x40014200 idle1 67838 435049 0 0 3 0x14200 bored softnet1 9800 212722 0 0 3 0x14200 bored softnet0 50872 377808 0 0 2 0x14200 systqmp 59549 156061 0 0 3 0x14200 bored systq 32583 451459 0 0 3 0x14200 tmoslp softclockmp 88595 198632 0 0 3 0x40014200 tmoslp softclock 85480 350922 0 0 3 0x40014200 idle0 1 298648 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 278 (syz-executor) thread 0xffff8000fffee018 (500998) exclusive rwlock vmmaplk r = 0 (0xfffffd806b590120) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 Process 93721 (syz-executor) thread 0xffff80003c459780 (146188) exclusive rwlock unix r = 0 (0xffff800001518c88) #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 socreate+0x214 pru_attach sys/sys/protosw.h:-1 [inline] #2 socreate+0x214 sys/kern/uipc_socket.c:219 #3 sys_socketpair+0xcc sys/kern/uipc_syscalls.c:476 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #5 Xsyscall+0x128 Process 43333 (syz-executor) thread 0xffff80003a808550 (51669) exclusive rwlock fdlock r = 0 (0xffff8000357fb510) #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 ptmioctl+0x13c sys/kern/tty_pty.c:1093 #3 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #5 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 8956 (syz-executor) thread 0xffff8000ffffd9f8 (428629) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839d6520) #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:748 #17 Xsyscall+0x128 exclusive rwlock clonelk r = 0 (0xffffffff837fd958) #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:748 #6 Xsyscall+0x128 Process 3425 (syz-executor) thread 0xffff8000ffffcf98 (143871) exclusive rwlock fdlock r = 0 (0xffff80002a27b0e8) #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 doopenat+0x18e sys/kern/vfs_syscalls.c:1105 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #4 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 11172K 11354K 166960K 11837 0 pcb 17 14K 16K 166960K 189 0 rtable 186 7K 10K 166960K 379 0 pf 33 17K 24K 166960K 137 0 ifaddr 39 6K 7K 166960K 73 0 ifgroup 51 2K 2K 166960K 111 0 sysctl 3 1K 9K 166960K 8 0 counters 66 36K 38K 166960K 120 0 ioctlops 0 0K 8K 166960K 1571 0 iov 0 0K 28K 166960K 45 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1361 86K 87K 166960K 1805 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 133 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 680 0 sigio 0 0K 0K 166960K 10 0 proc 72 115K 164K 166960K 614 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 79 0 in_multi 88 6K 7K 166960K 153 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 444 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 248 168K 185K 166960K 7917 0 UVM aobj 21 2K 4K 166960K 25 0 pinsyscall 42 84K 104K 166960K 1790 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 31 0 NDP 13 0K 2K 166960K 47 0 temp 57 8651K 8779K 166960K 39957 0 kqueue 13 20K 30K 166960K 138 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 120 139 0 135 2 0 2 2 0 8 1 rtentry 176 121 0 44 5 0 5 5 0 8 0 unpcb 144 305 0 281 2 0 2 2 0 8 1 syncache 336 7 0 7 3 2 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 736 272 0 263 13 11 2 7 0 8 1 arp 136 12 0 3 1 0 1 1 0 8 0 inpcb 328 773 0 760 12 10 2 7 0 8 0 nd6 152 19 0 4 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 20 0 20 1 0 1 1 0 8 1 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pffrag 232 13 0 8 1 0 1 1 0 482 0 pffrnode 88 11 0 6 1 0 1 1 0 8 0 pffrent 40 17 6 11 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 14 0 14 2 1 1 1 0 8 1 pfanchor 1288 6 0 2 2 1 1 1 0 8 0 pftag 88 4 0 4 2 1 1 1 0 8 1 pfstitem 24 57 0 12 1 0 1 1 0 8 0 pfstkey 128 57 0 12 2 0 2 2 0 8 0 pfstate 384 57 0 12 5 0 5 5 0 8 0 pfrule 1344 27 0 22 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 586 0 195 28 2 26 28 0 8 1 art_table 40 589 0 195 5 0 5 5 0 8 0 art_node 32 120 0 53 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 130 0 120 1 0 1 1 0 8 0 shmpl 112 22 0 4 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2588 0 1084 95 0 95 95 0 8 0 ffsino 296 2588 0 1084 117 0 117 117 0 8 0 nchpl 144 3537 0 1842 64 0 64 64 0 8 0 rtmask 32 8 0 8 1 0 1 1 0 8 1 uvmvnodes 80 2920 0 0 60 0 60 60 0 8 0 vnodes 216 2920 0 0 163 0 163 163 0 8 0 namei 1024 12463 0 12463 3 2 1 2 0 8 1 percpumem 16 75 0 27 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 4 2 1 1 1 0 8 1 kstatmem 264 60 0 36 3 0 3 3 0 8 1 scsiplug 72 4 0 4 3 2 1 1 0 8 1 scxspl 216 20945 0 20945 10 9 1 8 1 8 1 plimitpl 152 216 0 199 1 0 1 1 0 8 0 sigapl 424 969 0 920 7 1 6 7 0 8 0 knotepl 120 494 0 0 15 0 15 15 0 8 0 kqueuepl 224 228 0 218 3 1 2 2 0 8 1 pipepl 344 231 0 204 6 0 6 6 0 8 3 fdescpl 528 949 0 918 3 0 3 3 0 8 0 filepl 160 5919 0 5690 18 5 13 17 0 8 2 lockfpl 104 332 0 329 2 1 1 2 0 8 0 lockfspl 48 84 0 81 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 776 0 761 1 0 1 1 0 8 0 zombiepl 144 1230 0 1229 1 0 1 1 0 8 0 processpl 1232 969 0 920 6 1 5 5 0 8 0 procpl 664 1968 0 1909 6 0 6 6 0 8 0 sockpl 752 1240 0 1198 22 12 10 11 0 8 5 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 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 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 208 0 0 13 0 13 13 0 8 0 bufpl 280 8763 0 2620 440 0 440 440 0 8 1 anonpl 32 13237 0 0 107 0 107 107 0 246 0 amapchunkpl 152 25868 0 25306 42 11 31 31 0 158 8 amappl16 200 3807 0 3765 34 19 15 33 0 8 4 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 121 0 109 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1653 0 1622 4 1 3 3 0 8 0 amappl11 160 54 0 39 1 0 1 1 0 8 0 amappl10 152 9 0 8 1 0 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 21 0 18 1 0 1 1 0 8 0 amappl7 128 110 0 98 1 0 1 1 0 8 0 amappl6 120 197 0 192 1 0 1 1 0 8 0 amappl5 112 124 0 114 1 0 1 1 0 8 0 amappl4 104 318 0 298 1 0 1 1 0 8 0 amappl3 96 4383 0 4283 3 0 3 3 0 8 0 amappl2 88 1199 0 1122 2 0 2 2 0 8 0 amappl1 80 11017 0 10415 17 1 16 16 0 8 0 amappl 88 7123 0 6947 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 128 254 0 254 2 2 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 24 0 4 1 0 1 1 0 8 0 uaddrrnd 24 949 0 918 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 949 0 918 1 0 1 1 0 8 0 vmmpekpl 168 9777 0 9734 3 0 3 3 0 8 0 vmmpepl 168 67073 0 65057 115 11 104 115 0 357 4 vmsppl 488 948 0 918 6 1 5 5 0 8 0 rwobjpl 80 23692 0 19794 83 0 83 83 0 8 0 pdppl 4096 1906 0 1836 104 28 76 86 0 8 6 pvpl 32 19318 0 0 156 0 156 156 0 265 0 pmappl 256 948 0 918 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 293 0 47 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff837ccff0) 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 end of kernel end trace frame: 0x7355e308b330, count: -3 ddb{0}> machine ddbcpu 1 Stopped at bpfdetach+0x70: movq 0(%r15),%r12 ddb{1}> trace bpfdetach(ffff80000141d800) at bpfdetach+0x70 sys/net/bpf.c:1770 if_detach(ffff80000141d800) at if_detach+0x1bb sys/net/if.c:1226 tun_clone_destroy(ffff80000141d800) at tun_clone_destroy+0x2ce sys/net/if_tun.c:340 if_clone_destroy(ffff80003c42d260) at if_clone_destroy+0x1d5 sys/net/if.c:1415 ifioctl(ffff8000014cd208,80206979,ffff80003c42d260,ffff8000ffffd9f8) at ifioctl+0x59d sys/net/if.c:2092 sys_ioctl(ffff8000ffffd9f8,ffff80003c42d440,ffff80003c42d390) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c42d440) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42d440) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6540fdeeef0, count: -8