kernel: protection fault trap, code=0 Stopped at in_ifdetach+0x67: movzbl 0x1(%rax),%r12d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> show kasan No such command ddb{0}> trace in_ifdetach(ffff8000015fc000) at in_ifdetach+0x67 sys/netinet/in.c:1018 if_detach(ffff8000015fc000) at if_detach+0x2fe sys/net/if.c:1311 tun_clone_destroy(ffff8000015fc000) at tun_clone_destroy+0x2ce sys/net/if_tun.c:343 if_clone_destroy(ffff800033f7df70) at if_clone_destroy+0x205 sys/net/if.c:1480 tun_dev_close(5d02,7) at tun_dev_close+0x1d9 sys/net/if_tun.c:526 spec_close(ffff800033f7e030) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffff30070c6a100,7,fffff300097fd548,ffff80002a22afa8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffff3006cf4bae0,ffff80002a22afa8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffff3006cf4bae0,ffff80002a22afa8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621 fdrop(fffff3006cf4bae0,ffff80002a22afa8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff3006cf4bae0,ffff80002a22afa8) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a22afa8) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff80002a22afa8,43,0,1) at exit1+0x595 sys/kern/kern_exit.c:215 sys_exit(ffff80002a22afa8,ffff800033f7e3a0,ffff800033f7e2f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800033f7e3a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033f7e3a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ebe76944d70, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800033f7de60 rbx 0xffff800001609500 rdx 0 rcx 0xffff80002a22afa8 rax 0xdeafbeaddeafbead r8 0xffffffffffffffff r9 0 r10 0xb90953c8cedc8452 r11 0x662af616be42bc9a r12 0 r13 0xffff8000015fc048 r14 0xffff8000015fc000 r15 0xdeaf0036deafbead rip 0xffffffff8230c757 in_ifdetach+0x67 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff800033f7de10 ss 0x10 in_ifdetach+0x67: movzbl 0x1(%rax),%r12d ddb{0}> show proc PROC (syz-executor) tid=144824 pid=65727 tcnt=0 stat=onproc flags process=18 proc=2000 runpri=32, usrpri=73, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a22b240,0xffff80002a22aa88 process=0xffff800045fef9d8 user=0xffff800033f79000, vmspace=0xfffff30070e99b88 estcpu=23, cpticks=2, pctcpu=0.1, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 16064 509931 62473 32767 2 0x10 0 syz-executor 16064 37364 62473 32767 3 0x10 0x4000080 fsleep syz-executor 41809 175743 70642 32767 2 0x10 0 syz-executor 41809 83996 70642 32767 3 0x10 0x4000000 biowait syz-executor 54085 455539 54497 32767 7 0x10 0 syz-executor 54085 432350 54497 32767 2 0x10 0x4000000 syz-executor 5373 153408 29819 32767 2 0x10 0 syz-executor 6842 320889 83599 32767 2 0x4000010 0 syz-executor 6842 31680 83599 32767 3 0x4000010 0x4000080 fsleep syz-executor 66723 514864 2871 32767 2 0x10 0 syz-executor 66723 31720 2871 32767 3 0x10 0x4000080 kqread syz-executor 66723 179915 2871 32767 3 0x10 0x4000080 fsleep syz-executor 79613 267686 98306 32767 2 0x10 0 syz-executor 79613 466092 98306 32767 3 0x10 0x4000080 fsleep syz-executor 79613 428851 98306 32767 3 0x10 0x4000080 fsleep syz-executor 62473 63552 29788 32767 3 0x10 0x80 nanoslp syz-executor 29819 8626 82137 32767 2 0x10 0 syz-executor 54497 172442 78243 32767 3 0x10 0x80 nanoslp syz-executor 2871 208826 58171 32767 2 0x10 0 syz-executor 98306 350439 91394 32767 2 0x10 0 syz-executor 70642 3968 40162 32767 3 0x10 0x80 nanoslp syz-executor 83599 23906 13642 32767 2 0x10 0 syz-executor 82137 434050 50857 0 3 0x2 0x80 wait syz-executor 58171 503167 50857 0 3 0x2 0x80 wait syz-executor 78243 92061 50857 0 3 0x2 0x80 wait syz-executor 13642 465249 50857 0 3 0x2 0x80 wait syz-executor 29788 51016 50857 0 3 0x2 0x80 wait syz-executor 59407 200530 50857 0 3 0x2 0x80 wait syz-executor 91394 40241 50857 0 3 0x2 0x80 wait syz-executor 40162 367758 50857 0 3 0x2 0x80 wait syz-executor 50857 382040 8909 0 3 0x2 0x80 kqread syz-executor 8909 56864 90666 0 3 0x100002 0x88 sigsusp ksh 90666 397241 25258 0 3 0x10 0x88 kqread sshd-session 25258 302172 71327 0 3 0x12 0x80 kqread sshd-session 48795 175928 1 0 3 0x100003 0x80 ttyin getty 71327 275424 1 0 3 0 0x88 kqread sshd 46684 296551 59188 73 3 0x1100010 0x80 kqread syslogd 59188 120631 1 0 3 0x100002 0x80 sbwait syslogd 84101 402937 1 0 3 0x100000 0x80 kqread resolvd 16925 381486 57956 77 3 0x100012 0x80 kqread dhcpleased 73217 405491 57956 77 3 0x100012 0x80 kqread dhcpleased 57956 102545 1 0 3 0 0x80 kqread dhcpleased 25367 206395 0 0 3 0x14000 0x200 bored smr 57681 74474 0 0 2 0x14000 0x200 zerothread 25105 362226 0 0 3 0x14000 0x200 aiodoned aiodoned 57867 188734 0 0 3 0x14000 0x200 syncer update 24139 257508 0 0 3 0x14000 0x200 cleaner cleaner 19496 262208 0 0 3 0x14000 0x200 reaper reaper 93491 404059 0 0 3 0x14000 0x200 pgdaemon pagedaemon 88247 41815 0 0 3 0x14000 0x200 bored viomb 10335 132237 0 0 3 0x14000 0x40000200 acpi0 acpi0 1521 262483 0 0 3 0x14000 0x40000200 idle1 57435 511454 0 0 3 0x14000 0x200 bored softnet1 37264 256095 0 0 3 0x14000 0x200 bored softnet0 57018 197190 0 0 3 0x14000 0x200 bored systqmp 59796 214327 0 0 3 0x14000 0x200 bored systq 74739 491332 0 0 3 0x14000 0x200 tmoslp softclockmp 92914 158579 0 0 3 0x14000 0x40000200 tmoslp softclock 29963 338795 0 0 3 0x14000 0x40000200 idle0 1 293346 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 41809 (syz-executor) thread 0xffff80003afd0a88 (83996) exclusive rrwlock inode r = 0 (0xfffff3006cf3a1e8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1759 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 uipc_bind+0x44f sys/kern/uipc_usrreq.c:393 #11 sys_bind+0x2f6 sys/kern/uipc_syscalls.c:190 #12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff3006cf3a438) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c1 sys/kern/vfs_lookup.c:250 #7 uipc_bind+0x328 sys/kern/uipc_usrreq.c:371 #8 sys_bind+0x2f6 sys/kern/uipc_syscalls.c:190 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11048 12018K 12034K 166960K 12140 0 pcb 17 12K 12K 166960K 17 0 rtable 237 6K 7K 166960K 354 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 29 0 iov 0 0K 1K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1353 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 117K 166960K 163 0 proc 58 99K 147K 166960K 499 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 1 0 in_multi 99 6K 6K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 365 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 242 167K 177K 166960K 3019 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 46 92K 108K 166960K 1263 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 27 2K 2K 166960K 27 0 temp 35 9118K 9124K 166960K 3403 0 kqueue 19 27K 27K 166960K 32 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 37 0 34 1 0 1 1 0 8 0 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 51 0 35 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 15 0 10 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 73 0 63 2 0 2 2 0 8 1 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 semapl 72 2 0 0 1 0 1 1 0 8 0 shmpl 120 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1577 0 114 92 0 92 92 0 8 0 ffsino 296 1577 0 114 113 0 113 113 0 8 0 nchpl 144 1801 0 105 64 0 64 64 0 8 0 vnodes 216 1658 0 0 93 0 93 93 0 8 0 namei 1024 6013 0 6012 4 1 3 3 0 8 2 percpumem 16 51 0 0 1 0 1 1 0 8 0 kstatmem 264 25 0 0 2 0 2 2 0 8 0 scxspl 216 6139 0 6138 4 2 2 3 1 8 1 plimitpl 152 40 0 14 2 0 2 2 0 8 0 sigapl 424 461 0 408 7 0 7 7 0 8 0 knotepl 120 301 0 0 10 0 10 10 0 8 0 kqueuepl 224 91 0 13 5 0 5 5 0 8 0 pipepl 344 123 0 95 3 0 3 3 0 8 0 fdescpl 528 445 0 408 3 0 3 3 0 8 0 filepl 160 1617 0 1333 12 0 12 12 0 8 0 lockfpl 104 12 0 9 1 0 1 1 0 8 0 lockfspl 48 7 0 4 1 0 1 1 0 8 0 sessionpl 144 93 0 75 1 0 1 1 0 8 0 pgrppl 48 103 0 77 1 0 1 1 0 8 0 ucredpl 104 146 0 127 1 0 1 1 0 8 0 zombiepl 144 409 0 408 1 0 1 1 0 8 0 processpl 1232 461 0 408 5 0 5 5 0 8 0 procpl 664 491 0 430 6 0 6 6 0 8 0 sockpl 752 161 0 132 4 0 4 4 0 8 1 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k 2048 12 0 0 2 0 2 2 0 8 0 mextrefs 64 14 0 0 1 0 1 1 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 146 0 0 10 0 10 10 0 8 0 bufpl 272 2248 0 102 144 0 144 144 0 8 0 anonpl 32 5357 0 0 44 0 44 44 0 247 0 amapchunkpl 152 8368 0 7830 27 0 27 27 0 158 3 amappl16 200 1547 0 1525 5 0 5 5 0 8 3 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 410 0 409 1 0 1 1 0 8 0 amappl13 176 143 0 133 1 0 1 1 0 8 0 amappl12 168 685 0 649 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 0 1 1 0 8 1 amappl10 152 60 0 50 1 0 1 1 0 8 0 amappl9 144 271 0 271 1 0 1 1 0 8 1 amappl8 136 95 0 94 1 0 1 1 0 8 0 amappl7 128 137 0 126 1 0 1 1 0 8 0 amappl6 120 149 0 147 1 0 1 1 0 8 0 amappl5 112 153 0 146 1 0 1 1 0 8 0 amappl4 104 260 0 244 1 0 1 1 0 8 0 amappl3 96 1499 0 1397 4 1 3 3 0 8 0 amappl2 88 565 0 490 2 0 2 2 0 8 0 amappl1 80 10326 0 9761 13 0 13 13 0 8 0 amappl 88 2327 0 2148 5 0 5 5 0 92 0 uvmvnodes 80 97 0 0 2 0 2 2 0 8 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 445 0 408 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 445 0 408 1 0 1 1 0 8 0 vmmpekpl 168 5504 0 5469 2 0 2 2 0 8 0 vmmpepl 168 37819 0 35785 92 0 92 92 0 357 1 vmsppl 488 444 0 408 7 1 6 6 0 8 0 rwobjpl 80 14022 0 13092 21 0 21 21 0 8 0 pdppl 4096 897 0 816 107 14 93 93 0 8 12 pvpl 32 13159 0 0 107 0 107 107 0 265 0 pmappl 256 444 0 408 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 419 0 18 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace in_ifdetach(ffff8000015fc000) at in_ifdetach+0x67 sys/netinet/in.c:1018 if_detach(ffff8000015fc000) at if_detach+0x2fe sys/net/if.c:1311 tun_clone_destroy(ffff8000015fc000) at tun_clone_destroy+0x2ce sys/net/if_tun.c:343 if_clone_destroy(ffff800033f7df70) at if_clone_destroy+0x205 sys/net/if.c:1480 tun_dev_close(5d02,7) at tun_dev_close+0x1d9 sys/net/if_tun.c:526 spec_close(ffff800033f7e030) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffff30070c6a100,7,fffff300097fd548,ffff80002a22afa8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffff3006cf4bae0,ffff80002a22afa8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffff3006cf4bae0,ffff80002a22afa8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621 fdrop(fffff3006cf4bae0,ffff80002a22afa8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff3006cf4bae0,ffff80002a22afa8) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a22afa8) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff80002a22afa8,43,0,1) at exit1+0x595 sys/kern/kern_exit.c:215 sys_exit(ffff80002a22afa8,ffff800033f7e3a0,ffff800033f7e2f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800033f7e3a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033f7e3a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ebe76944d70, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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: 0x7277e14ff2b0, count: -3