login: kernel: protection fault trap, code=0 Stopped at wsmux_getmux+0x247: movq 0(%r12,%r15,8),%rbx ddb> ddb> set $lines = 0 ddb> show panic the kernel did not panic ddb> trace wsmux_getmux(b7d7f9c07d074208) at wsmux_getmux+0x247 sys/dev/wscons/wsmux.c:151 wsmux_do_ioctl(d15541cd434bc446,80085761,fffffd80355b2968,82,fffffd803f7c7ba0) at wsmux_do_ioctl+0x268 wsmux_add_mux sys/dev/wscons/wsmux.c:563 [inline] wsmux_do_ioctl(d15541cd434bc446,80085761,fffffd80355b2968,82,fffffd803f7c7ba0) at wsmux_do_ioctl+0x268 sys/dev/wscons/wsmux.c:424 VOP_IOCTL(6c2539057c8d3560,80085761,fffffd80361c30f8,ffff80001496c718,fffffd80355b2968,ffff80001496c718) at VOP_IOCTL+0x80 sys/kern/vfs_vops.c:290 vn_ioctl(a3d07b2645faf15e,fffffd80361c30f8,ffff80001496c718,8) at vn_ioctl+0xc5 sys/kern/vfs_vnops.c:512sys_ioctl(47df970106db668d,2,ffff80001496c718) at sys_ioctl+0x639 syscall(53d665730488a663) at syscall+0x528 Xsyscall(6,0,7f7ffffc6548,0,1,7f7ffffc6558) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc64e0, count: -7 ddb> show registers rdi 0x40 rsi 0xdf7ffce3 rbp 0xffff8000149a42e0 rbx 0x40 rdx 0x8b rcx 0x1 rax 0 r8 0xffffffff81257b63 wsmux_do_ioctl+0x243 r9 0x5 r10 0x74912713bbceea07 r11 0x616ad806869dc56c r12 0xffff80000090e400 r13 0x82 r14 0xdf7ffce3 r15 0xffffffffdf7ffce3 rip 0xffffffff81258837 wsmux_getmux+0x247 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000149a4290 ss 0x10 wsmux_getmux+0x247: movq 0(%r12,%r15,8),%rbx ddb> show proc PROC (syz-executor7627) pid=140721 stat=onproc flags process=2 proc=0 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff80001496cbc8,0xffffffff822084f8 process=0xffff8000ffff6358 user=0xffff80001499f000, vmspace=0xfffffd803f015738 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *92412 140721 52635 0 7 0x2 syz-executor7627 52635 122267 29302 0 3 0x10008a pause ksh 29302 380339 12914 0 3 0x92 select sshd 75225 271958 1 0 3 0x100083 ttyin getty 12914 54853 1 0 3 0x80 select sshd 69840 452209 58749 73 3 0x100090 kqread syslogd 58749 493267 1 0 3 0x100082 netio syslogd 78540 409985 1 77 3 0x100090 poll dhclient 85610 261204 1 0 3 0x80 poll dhclient 9208 99248 0 0 3 0x14200 pgzero zerothread 8730 349173 0 0 3 0x14200 aiodoned aiodoned 95369 371106 0 0 3 0x14200 syncer update 90651 104226 0 0 3 0x14200 cleaner cleaner 86722 286597 0 0 3 0x14200 reaper reaper 20484 32470 0 0 3 0x14200 pgdaemon pagedaemon 20632 131443 0 0 3 0x14200 bored crynlk 30823 412205 0 0 3 0x14200 bored crypto 28392 318641 0 0 3 0x40014200 acpi0 acpi0 51058 12219 0 0 3 0x14200 bored softnet 57019 160550 0 0 3 0x14200 bored systqmp 6432 469524 0 0 3 0x14200 bored systq 39983 55061 0 0 3 0x40014200 bored softclock 52764 1157 0 0 3 0x40014200 idle0 1 311832 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9427 6307K 6307K 78643K 10521 0 0 pcb 23 9K 9K 78643K 55 0 0 rtable 61 1K 2K 78643K 115 0 0 ifaddr 21 7K 7K 78643K 21 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 13 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1167 73K 73K 78643K 1172 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1777 193K 286K 78643K 12501 0 0 file desc 1 0K 0K 78643K 1 0 0 proc 40 30K 38K 78643K 201 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 149 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 47 2K 3K 78643K 665 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 3 0K 0K 78643K 3 0 0 temp 30 2327K 2391K 78643K 1690 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 2 0 0 1 0 1 1 0 8 0 inpcbpl 280 22 0 16 1 0 1 1 0 8 0 plimitpl 152 13 0 8 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1383 0 17 45 0 45 45 0 8 0 ffsino 240 1383 0 17 81 0 81 81 0 8 0 nchpl 144 1554 0 30 57 0 57 57 0 8 0 uvmvnodes 72 1392 0 0 26 0 26 26 0 8 0 vnodes 200 1392 0 0 74 0 74 74 0 8 0 namei 1024 3257 0 3257 3 2 1 1 0 8 1 scxspl 192 2323 0 2323 6 1 5 5 0 8 5 sigapl 432 173 0 163 2 0 2 2 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 114 0 107 3 2 1 1 0 8 0 fdescpl 424 174 0 163 2 0 2 2 0 8 0 filepl 120 808 0 765 2 0 2 2 0 8 0 lockfpl 96 7 0 6 2 1 1 1 0 8 0 lockfspl 24 4 0 3 2 1 1 1 0 8 0 sessionpl 112 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 47 0 40 1 0 1 1 0 8 0 zombiepl 144 163 0 163 3 2 1 1 0 8 1 processpl 840 187 0 163 4 1 3 4 0 8 0 procpl 600 187 0 163 3 0 3 3 0 8 0 sockpl 384 64 0 48 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 2 1 1 1 0 8 1 mcl2k 2048 5507 0 5479 7 1 6 6 0 8 2 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9553 0 9513 5 1 4 4 0 8 0 bufpl 256 1997 0 261 109 0 109 109 0 8 0 anonpl 16 17683 0 16589 8 2 6 7 0 62 1 amapchunkpl 152 553 0 518 2 0 2 2 0 158 0 amappl16 192 67 0 62 1 0 1 1 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 1 0 1 1 1 0 1 0 8 0 amappl13 168 15 0 12 1 0 1 1 0 8 0 amappl12 160 9 0 9 2 1 1 1 0 8 1 amappl11 152 176 0 167 1 0 1 1 0 8 0 amappl10 144 47 0 47 3 2 1 1 0 8 1 amappl9 136 192 0 191 1 0 1 1 0 8 0 amappl8 128 101 0 95 1 0 1 1 0 8 0 amappl7 120 28 0 24 1 0 1 1 0 8 0 amappl6 112 41 0 37 1 0 1 1 0 8 0 amappl5 104 158 0 147 1 0 1 1 0 8 0 amappl4 96 251 0 230 1 0 1 1 0 8 0 amappl3 88 111 0 106 1 0 1 1 0 8 0 amappl2 80 568 0 533 1 0 1 1 0 8 0 amappl1 72 11523 0 11134 16 7 9 16 0 8 0 amappl 72 381 0 362 1 0 1 1 0 75 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 174 0 163 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 174 0 163 1 0 1 1 0 8 0 vmmpekpl 168 5174 0 5160 1 0 1 1 0 8 0 vmmpepl 168 23357 0 22667 49 15 34 47 0 357 2 vmsppl 264 173 0 163 1 0 1 1 0 8 0 pdppl 4096 354 0 326 5 0 5 5 0 8 0 pvpl 32 70710 0 67990 35 9 26 26 0 265 3 pmappl 192 173 0 163 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 226 0 7 7 0 7 7 0 8 0 ddb>