kernel: protection fault trap, code=0 Stopped at in_ifdetach+0x67: movzbl 0x1(%rax),%r12d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> show kasan No such command ddb{1}> trace in_ifdetach(ffff8000015eb800) at in_ifdetach+0x67 sys/netinet/in.c:1018 if_detach(ffff8000015eb800) at if_detach+0x2fe sys/net/if.c:1311 tun_clone_destroy(ffff8000015eb800) at tun_clone_destroy+0x2ce sys/net/if_tun.c:343 if_clone_destroy(ffff800035799b30) at if_clone_destroy+0x205 sys/net/if.c:1480 tun_dev_close(5d03,7) at tun_dev_close+0x1d9 sys/net/if_tun.c:526 spec_close(ffff800035799bf0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffa006e35c610,7,fffffa00097fd7b8,ffff800045fef240) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffa006d0c3358,ffff800045fef240) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffa006d0c3358,ffff800045fef240) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621 fdrop(fffffa006d0c3358,ffff800045fef240) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffa006d0c3358,ffff800045fef240) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff800045fef240) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff800045fef240,43,0,1) at exit1+0x595 sys/kern/kern_exit.c:215 sys_exit(ffff800045fef240,ffff800035799f60,ffff800035799eb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800035799f60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035799f60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bbae3ad9f10, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800035799a20 rbx 0xffff8000015f83c0 rdx 0 rcx 0xffff800045fef240 rax 0xdeadbeefdeadbeef r8 0x23 r9 0x1 r10 0xef80a7e321d02163 r11 0xaf81e5ec0e59f613 r12 0 r13 0xffff8000015eb848 r14 0xffff8000015eb800 r15 0xdead0036deadbeef rip 0xffffffff81f04527 in_ifdetach+0x67 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff8000357999d0 ss 0 in_ifdetach+0x67: movzbl 0x1(%rax),%r12d ddb{1}> show proc PROC (syz-executor) tid=88677 pid=7507 tcnt=0 stat=onproc flags process=18 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1 forw=0xffffffffffffffff, list=0xffff800045feed10,0xffff800045fe62c8 process=0xffff800045fe8e88 user=0xffff800035795000, vmspace=0xfffffa006d152208 estcpu=36, cpticks=2, pctcpu=0.1, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 4644 89770 57054 32767 2 0x10 0 syz-executor 4644 180595 57054 32767 2 0x10 0x4000000 syz-executor 80114 336321 28193 0 2 0x2 0 syz-executor 45462 335174 94968 0 2 0x100002 0 sh 23555 300288 7623 32767 2 0x10 0 syz-executor 23555 56901 7623 32767 2 0x10 0x4000000 syz-executor 53027 466972 4391 32767 3 0x10 0x80 nanoslp syz-executor 53027 21249 4391 32767 3 0x10 0x4000080 ttyout syz-executor 53027 133833 4391 32767 3 0x10 0x4000080 ttyout syz-executor 53027 142990 4391 32767 3 0x10 0x4000080 pipewr syz-executor 53027 175675 4391 32767 3 0x10 0x4000080 fsleep syz-executor 28250 401518 70695 32767 7 0x10 0 syz-executor 28250 97988 70695 32767 3 0x10 0x4000080 fsleep syz-executor 28250 17767 70695 32767 3 0x10 0x4000080 fsleep syz-executor 7623 326560 19119 32767 3 0x10 0x80 nanoslp syz-executor 4391 85604 68207 32767 2 0x10 0 syz-executor 34864 220086 67000 32767 2 0x10000010 0 syz-executor 70695 436295 27814 32767 3 0x10 0x80 nanoslp syz-executor 57054 177746 60364 32767 3 0x10 0x80 nanoslp syz-executor 94968 520851 17516 0 3 0 0x80 wait syz-executor 68207 371772 28193 0 3 0x2 0x80 wait syz-executor 19119 406166 28193 0 3 0x2 0x80 wait syz-executor 67000 182065 28193 0 3 0x2 0x80 wait syz-executor 13775 311954 28193 0 3 0x2 0x80 wait syz-executor 27814 330271 28193 0 3 0x2 0x80 wait syz-executor 17516 75804 28193 0 3 0x2 0x80 wait syz-executor 60364 303260 28193 0 3 0x2 0x80 wait syz-executor 28193 439691 46788 0 2 0x2 0 syz-executor 46788 473313 89290 0 3 0x100002 0x88 sigsusp ksh 89290 37483 23746 0 3 0x10 0x88 kqread sshd-session 23746 201413 74758 0 3 0x12 0x80 kqread sshd-session 46705 1120 1 0 3 0x100003 0x80 ttyin getty 74758 266373 1 0 3 0 0x88 kqread sshd 18046 364392 57615 73 3 0x1100010 0x80 kqread syslogd 57615 255999 1 0 3 0x100002 0x80 sbwait syslogd 85880 179520 1 0 3 0x100000 0x80 kqread resolvd 82205 175683 57476 77 3 0x100012 0x80 kqread dhcpleased 80558 351837 57476 77 3 0x100012 0x80 kqread dhcpleased 57476 389583 1 0 3 0 0x80 kqread dhcpleased 56168 107316 0 0 3 0x14000 0x200 bored smr 90403 392296 0 0 2 0x14000 0x200 zerothread 87454 315887 0 0 3 0x14000 0x200 aiodoned aiodoned 43591 195812 0 0 3 0x14000 0x200 syncer update 35131 277987 0 0 3 0x14000 0x200 cleaner cleaner 58015 164510 0 0 3 0x14000 0x200 reaper reaper 58873 160621 0 0 3 0x14000 0x200 pgdaemon pagedaemon 13820 333424 0 0 3 0x14000 0x200 bored viomb 9735 110887 0 0 3 0x14000 0x40000200 acpi0 acpi0 77605 189669 0 0 3 0x14000 0x40000200 idle1 82263 454711 0 0 3 0x14000 0x200 bored softnet1 1146 439251 0 0 2 0x14000 0x200 softnet0 53642 108601 0 0 3 0x14000 0x200 bored systqmp 39510 52999 0 0 3 0x14000 0x200 bored systq 5186 200678 0 0 3 0x14000 0x200 tmoslp softclockmp 19112 316282 0 0 3 0x14000 0x40000200 tmoslp softclock 72004 196829 0 0 3 0x14000 0x40000200 idle0 1 440109 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 28250 (syz-executor) thread 0xffff800045fe4fb8 (401518) exclusive rwlock uobjlk r = 0 (0xfffffa006d7a12d0) #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 uvm_fault+0x1e5 sys/uvm/uvm_fault.c:649 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 #4 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffa006d003e80) #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:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 #7 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11047 12016K 12034K 166960K 12142 0 pcb 17 12K 12K 166960K 17 0 rtable 201 5K 6K 166960K 329 0 pf 29 16K 16K 166960K 31 0 ifaddr 36 6K 7K 166960K 42 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 8 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1360 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 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 22 81K 117K 166960K 147 0 sigio 1 0K 0K 166960K 1 0 proc 58 99K 131K 166960K 489 0 subproc 71 4K 4K 166960K 80 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 2 0 in_multi 78 5K 6K 166960K 90 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 2 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 355 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 177K 183K 166960K 2956 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 43 86K 110K 166960K 1210 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 22 1K 1K 166960K 25 0 temp 33 9114K 9120K 166960K 3288 0 kqueue 14 22K 22K 166960K 27 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 32 0 29 1 0 1 1 0 8 0 rtentry 176 104 0 12 5 0 5 5 0 8 0 unpcb 144 42 0 26 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 12 0 6 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 63 0 53 1 0 1 1 0 8 0 nd6 152 21 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 1 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 413 0 44 26 0 26 26 0 8 0 art_table 40 414 0 44 5 0 5 5 0 8 0 art_node 32 104 0 20 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1565 0 98 92 0 92 92 0 8 0 ffsino 296 1565 0 98 113 0 113 113 0 8 0 nchpl 144 1758 0 63 63 0 63 63 0 8 0 vnodes 216 1654 0 0 92 0 92 92 0 8 0 namei 1024 5826 0 5826 2 0 2 2 0 8 2 percpumem 16 51 0 1 1 0 1 1 0 8 0 kstatmem 264 25 0 2 2 0 2 2 0 8 0 scxspl 216 6159 0 6159 4 3 1 3 1 8 1 plimitpl 152 40 0 14 2 0 2 2 0 8 0 sigapl 424 434 0 383 7 0 7 7 0 8 0 knotepl 120 100 0 0 4 0 4 4 0 8 0 kqueuepl 224 24 0 13 1 0 1 1 0 8 0 pipepl 344 125 0 95 3 0 3 3 0 8 0 fdescpl 528 418 0 384 3 0 3 3 0 8 0 filepl 160 1467 0 1243 10 0 10 10 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 23 0 8 1 0 1 1 0 8 0 pgrppl 48 32 0 9 1 0 1 1 0 8 0 ucredpl 104 122 0 105 1 0 1 1 0 8 0 zombiepl 144 385 0 383 1 0 1 1 0 8 0 processpl 1232 434 0 383 5 0 5 5 0 8 0 procpl 664 462 0 403 6 0 6 6 0 8 0 sockpl 752 137 0 108 4 0 4 4 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k 2048 13 0 0 2 0 2 2 0 8 0 mextrefs 64 13 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 135 0 0 9 0 9 9 0 8 0 bufpl 272 2230 0 102 142 0 142 142 0 8 0 anonpl 32 5562 0 0 45 0 45 45 0 247 0 amapchunkpl 152 8047 0 7459 25 0 25 25 0 158 1 amappl16 200 1542 0 1502 5 0 5 5 0 8 2 amappl15 192 19 0 19 2 2 0 1 0 8 0 amappl14 184 410 0 406 1 0 1 1 0 8 0 amappl13 176 107 0 97 1 0 1 1 0 8 0 amappl12 168 676 0 645 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 0 1 1 0 8 1 amappl10 152 58 0 48 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 0 1 1 0 8 1 amappl8 136 93 0 92 1 0 1 1 0 8 0 amappl7 128 154 0 143 1 0 1 1 0 8 0 amappl6 120 146 0 144 1 0 1 1 0 8 0 amappl5 112 117 0 109 1 0 1 1 0 8 0 amappl4 104 255 0 239 1 0 1 1 0 8 0 amappl3 96 1382 0 1297 4 1 3 3 0 8 0 amappl2 88 526 0 456 2 0 2 2 0 8 0 amappl1 80 10054 0 9492 14 0 14 14 0 8 0 amappl 88 2294 0 2134 5 0 5 5 0 92 1 uvmvnodes 80 95 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 418 0 384 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 418 0 384 1 0 1 1 0 8 0 vmmpekpl 168 5336 0 5294 2 0 2 2 0 8 0 vmmpepl 168 36091 0 34199 93 0 93 93 0 357 4 vmsppl 488 417 0 384 7 1 6 6 0 8 0 rwobjpl 80 13754 0 12812 22 0 22 22 0 8 0 pdppl 4096 843 0 768 105 10 95 95 0 8 20 pvpl 32 12070 0 0 99 1 98 98 0 265 0 pmappl 256 417 0 384 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 409 0 13 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8393aff0) 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(ffffffff83ab6800) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:143 [inline] __mp_lock(ffffffff83ab6800) at __mp_lock+0x190 sys/kern/kern_lock.c:173 uvm_fault(fffffa006d003d80,fb8ebb0b000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650 upageflttrap(ffff8000377a08b0,fb8ebb0b000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 usertrap(ffff8000377a08b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x75d4beeb8820, count: -8 ddb{0}> machine ddbcpu 1 Stopped at in_ifdetach+0x67: movzbl 0x1(%rax),%r12d ddb{1}> trace in_ifdetach(ffff8000015eb800) at in_ifdetach+0x67 sys/netinet/in.c:1018 if_detach(ffff8000015eb800) at if_detach+0x2fe sys/net/if.c:1311 tun_clone_destroy(ffff8000015eb800) at tun_clone_destroy+0x2ce sys/net/if_tun.c:343 if_clone_destroy(ffff800035799b30) at if_clone_destroy+0x205 sys/net/if.c:1480 tun_dev_close(5d03,7) at tun_dev_close+0x1d9 sys/net/if_tun.c:526 spec_close(ffff800035799bf0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffa006e35c610,7,fffffa00097fd7b8,ffff800045fef240) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffa006d0c3358,ffff800045fef240) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffa006d0c3358,ffff800045fef240) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621 fdrop(fffffa006d0c3358,ffff800045fef240) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffa006d0c3358,ffff800045fef240) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff800045fef240) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff800045fef240,43,0,1) at exit1+0x595 sys/kern/kern_exit.c:215 sys_exit(ffff800045fef240,ffff800035799f60,ffff800035799eb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800035799f60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035799f60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bbae3ad9f10, count: -15