uvm_fault(0xfffffd807f00c708, 0x9f, 0, 2) -> e kernel: page fault trap, code=0 Stopped at wsmux_detach_sc+0xcc: movq %rcx,0(%rax) ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xfffffd807f00c708, 0x9f, 0, 2) -> e wsmux_detach_sc(ffff80000001ce00) at wsmux_detach_sc+0xcc sys/dev/wscons/wsmux.c:696 end trace frame: 0xffff800020c1d480, count: 0 ddb{0}> trace wsmux_detach_sc(ffff80000001ce00) at wsmux_detach_sc+0xcc sys/dev/wscons/wsmux.c:696 wskbdopen(4300,1,2000,ffff800020b43530) at wskbdopen+0xe9 sys/dev/wscons/wskbd.c:821 spec_open(ffff800020c1d500) at spec_open+0x217 sys/kern/spec_vnops.c:158 VOP_OPEN(fffffd806af9f610,1,fffffd807f7c7a80,ffff800020b43530) at VOP_OPEN+0x76 sys/kern/vfs_vops.c:153 vn_open(ffff800020c1d6f0,1,0) at vn_open+0x4c6 sys/kern/vfs_vnops.c:174 doopenat(ffff800020b43530,ffffff9c,200000c0,0,0,ffff800020c1d930) at doopenat+0x2be sys/kern/vfs_syscalls.c:1045 syscall(ffff800020c1d9e0) at syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c1d9e0) at syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffffae,0,4,f1004d0f010) at Xsyscall+0x128 end of kernel end trace frame: 0xf1287c30a30, count: -8 ddb{0}> show registers rdi 0xffffffff8150a909 spllower+0x79 rsi 0xc90 rbp 0xffff800020c1d420 rbx 0 rdx 0xc91 rcx 0xffffffffffffffff rax 0x9f r8 0 r9 0 r10 0xffff800020c2be10 r11 0x20f34bf05be26d8a r12 0xffff800000026fb8 r13 0x1708 __ALIGN_SIZE+0x708 r14 0xffff80000001ce00 r15 0x1 rip 0xffffffff8161f82c wsmux_detach_sc+0xcc cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff800020c1d3f0 ss 0x10 wsmux_detach_sc+0xcc: movq %rcx,0(%rax) ddb{0}> show proc PROC (syz-executor.0) pid=103797 stat=onproc flags process=0 proc=4000000 pri=0, usrpri=72, nice=20 forw=0xffffffffffffffff, list=0xffff800020b42270,0xffff800020b42028 process=0xffff800020b446a0 user=0xffff800020c18000, vmspace=0xfffffd807f00c708 estcpu=22, cpticks=0, pctcpu=1.97 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 59602 351324 25605 0 2 0 syz-executor.0 *59602 103797 25605 0 7 0x4000000 syz-executor.0 59602 290164 25605 0 7 0x4000000 syz-executor.0 59601 276687 0 0 3 0x14200 bored sosplice 89912 199665 96780 0 3 0x82 nanosleep syz-executor.1 25605 513782 96780 0 3 0x82 nanosleep syz-executor.0 96780 183117 22242 0 3 0x82 thrsleep syz-fuzzer 96780 375718 22242 0 3 0x4000082 nanosleep syz-fuzzer 96780 29737 22242 0 3 0x4000082 thrsleep syz-fuzzer 96780 325411 22242 0 3 0x4000082 thrsleep syz-fuzzer 96780 16982 22242 0 3 0x4000082 thrsleep syz-fuzzer 96780 524036 22242 0 3 0x4000082 thrsleep syz-fuzzer 96780 262368 22242 0 3 0x4000082 kqread syz-fuzzer 96780 7192 22242 0 3 0x4000082 thrsleep syz-fuzzer 96780 383387 22242 0 3 0x4000082 thrsleep syz-fuzzer 96780 315998 22242 0 3 0x4000082 thrsleep syz-fuzzer 22242 306002 83328 0 3 0x10008a pause ksh 83328 304015 2723 0 3 0x92 select sshd 56109 342463 1 0 3 0x100083 ttyin getty 2723 353248 1 0 3 0x80 select sshd 43599 163922 1991 73 2 0x100090 syslogd 1991 91756 1 0 3 0x100082 netio syslogd 92026 338972 1 77 3 0x100090 poll dhclient 17933 389216 1 0 3 0x80 poll dhclient 43670 2108 0 0 3 0x14200 pgzero zerothread 46778 413987 0 0 3 0x14200 aiodoned aiodoned 31402 495835 0 0 3 0x14200 syncer update 19440 129644 0 0 3 0x14200 cleaner cleaner 86064 280553 0 0 3 0x14200 reaper reaper 64646 499810 0 0 3 0x14200 pgdaemon pagedaemon 65546 422538 0 0 3 0x14200 bored crynlk 82018 11298 0 0 3 0x14200 bored crypto 82990 337419 0 0 3 0x40014200 acpi0 acpi0 71656 445077 0 0 3 0x40014200 idle1 29494 258814 0 0 3 0x14200 bored softnet 32300 178713 0 0 3 0x14200 bored systqmp 92715 63177 0 0 3 0x14200 bored systq 35619 432201 0 0 3 0x40014200 bored softclock 76821 229675 0 0 3 0x40014200 idle0 1 13888 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 59602 (syz-executor.0) thread 0xffff800020b43530 (103797) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82330470) locked @ /syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/trap.c:161 #0 witness_lock+0x58a sys/kern/subr_witness.c:1205 #1 ___mp_acquire_count+0x67 sys/kern/kern_lock.c:231 #2 mi_switch+0x3b0 sys/kern/sched_bsd.c:436 #3 sleep_finish+0x110 sys/kern/kern_synch.c:312 #4 sleep_finish_all+0x34 sleep_finish_timeout sys/kern/kern_synch.c:336 [inline] #4 sleep_finish_all+0x34 sys/kern/kern_synch.c:157 #5 tsleep+0x1bc #6 pckbc_enqueue_cmd+0x29d sys/dev/ic/pckbc.c:923 #7 pckbd_enable+0x125 sys/dev/pckbc/pckbd.c:481 #8 wskbd_mux_close+0x98 sys/dev/wscons/wskbd.c:891 #9 wsmux_detach_sc+0x9b sys/dev/wscons/wsmux.c:693 #10 wskbdopen+0xe9 sys/dev/wscons/wskbd.c:821 #11 spec_open+0x217 sys/kern/spec_vnops.c:158 #12 VOP_OPEN+0x76 sys/kern/vfs_vops.c:153 #13 vn_open+0x4c6 sys/kern/vfs_vnops.c:174 #14 doopenat+0x2be sys/kern/vfs_syscalls.c:1045 #15 syscall+0x5ac mi_syscall sys/sys/syscall_mi.h:99 [inline] #15 syscall+0x5ac sys/arch/amd64/amd64/trap.c:574 #16 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9469 6339K 6350K 78643K 10596 0 0 pcb 23 9K 9K 78643K 125 0 0 rtable 97 3K 3K 78643K 175 0 0 ifaddr 38 10K 10K 78643K 41 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 15 0 0 iov 0 0K 24K 78643K 14 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1200 75K 75K 78643K 1286 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 6 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 30 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1792 194K 288K 78643K 12592 0 0 file desc 5 13K 25K 78643K 169 0 0 proc 41 38K 58K 78643K 271 0 0 subproc 64 65538K 67586K 78643K 70 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 19 0 0 in_multi 33 2K 2K 78643K 37 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 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 177 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 78 20K 20K 78643K 1274 0 0 UVM aobj 11 2K 2K 78643K 13 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 6 0K 0K 78643K 11 0 0 temp 102 2356K 2421K 78643K 3179 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 4 0 0 1 0 1 1 0 8 0 inpcbpl 280 98 0 91 1 0 1 1 0 8 0 plimitpl 152 15 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 41 0 1 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 42 0 38 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 185 0 0 12 0 12 12 0 8 0 art_table 32 186 0 0 2 0 2 2 0 8 0 art_node 16 40 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1712 0 303 46 0 46 46 0 8 0 ffsino 272 1712 0 303 95 0 95 95 0 8 0 nchpl 144 2165 0 542 61 0 61 61 0 8 0 uvmvnodes 72 1766 0 0 33 0 33 33 0 8 0 vnodes 200 1766 0 0 93 0 93 93 0 8 0 namei 1024 5571 0 5571 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 6068 0 6068 6 5 1 5 0 8 1 sigapl 432 337 0 324 2 0 2 2 0 8 0 futexpl 56 1774 0 1774 1 0 1 1 0 8 1 knotepl 112 92 0 65 2 1 1 2 0 8 0 kqueuepl 104 54 0 52 1 0 1 1 0 8 0 pipepl 112 198 0 179 1 0 1 1 0 8 0 fdescpl 488 338 0 324 3 1 2 3 0 8 0 filepl 152 1877 0 1781 6 1 5 5 0 8 1 lockfpl 104 73 0 73 2 1 1 1 0 8 1 lockfspl 32 170 0 170 2 1 1 1 0 8 1 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 349 0 342 1 0 1 1 0 8 0 zombiepl 144 324 0 323 1 0 1 1 0 8 0 processpl 840 353 0 323 4 0 4 4 0 8 0 procpl 600 704 0 663 4 0 4 4 0 8 0 sosppl 128 3 0 3 2 2 0 1 0 8 0 sockpl 384 204 0 187 3 0 3 3 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 115 0 0 14 0 14 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 135 0 0 8 0 8 8 0 8 0 bufpl 256 5635 0 1015 289 0 289 289 0 8 0 anonpl 16 40593 0 33134 47 8 39 46 0 125 8 amapchunkpl 152 1535 0 1448 6 1 5 5 0 158 1 amappl16 192 1394 0 1002 31 10 21 31 0 8 1 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 7 0 6 2 1 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 11 0 10 2 1 1 1 0 8 0 amappl11 152 258 0 247 1 0 1 1 0 8 0 amappl10 144 132 0 128 1 0 1 1 0 8 0 amappl9 136 429 0 426 1 0 1 1 0 8 0 amappl8 128 130 0 113 1 0 1 1 0 8 0 amappl7 120 39 0 33 1 0 1 1 0 8 0 amappl6 112 57 0 49 1 0 1 1 0 8 0 amappl5 104 122 0 110 1 0 1 1 0 8 0 amappl4 96 263 0 242 1 0 1 1 0 8 0 amappl3 88 131 0 125 1 0 1 1 0 8 0 amappl2 80 2149 0 2097 2 0 2 2 0 8 0 amappl1 72 15830 0 15410 24 14 10 19 0 8 0 amappl 72 906 0 872 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 12 0 2 1 0 1 1 0 8 0 uaddrrnd 24 338 0 324 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 338 0 324 1 0 1 1 0 8 0 vmmpekpl 168 6458 0 6437 2 0 2 2 0 8 0 vmmpepl 168 43377 0 42046 81 16 65 71 0 357 4 vmsppl 360 337 0 324 2 0 2 2 0 8 0 pdppl 4096 683 0 648 6 1 5 6 0 8 0 pvpl 32 152004 0 141080 132 12 120 127 0 265 30 pmappl 224 337 0 324 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 435 0 3 13 0 13 13 0 8 0