uvm_fault(0xffffff007f124528, 0x8f, 0, 1) -> e kernel: page fault trap, code=0 Stopped at wsmuxclose+0x65: cmpq %r12,0x90(%r15) ddb{1}> ddb{1}> set $lines = 0 ddb{1}> show panic kernel page fault uvm_fault(0xffffff007f124528, 0x8f, 0, 1) -> e wsmuxclose(ffff8000210a2bd0,ffff8000211bd6e8,ffffff00625a20d0,0) at wsmuxclose+0x65 wsmux_do_close sys/dev/wscons/wsmux.c:307 [inline] wsmuxclose(ffff8000210a2bd0,ffff8000211bd6e8,ffffff00625a20d0,0) at wsmuxclose+0x65 sys/dev/wscons/wsmux.c:277 end trace frame: 0xffff8000211bd6d0, count: 0 ddb{1}> trace wsmuxclose(ffff8000210a2bd0,ffff8000211bd6e8,ffffff00625a20d0,0) at wsmuxclose+0x65 wsmux_do_close sys/dev/wscons/wsmux.c:307 [inline] wsmuxclose(ffff8000210a2bd0,ffff8000211bd6e8,ffffff00625a20d0,0) at wsmuxclose+0x65 sys/dev/wscons/wsmux.c:277 spec_close(ffffffff81e27f68) at spec_close+0x271 sys/kern/spec_vnops.c:553 VOP_CLOSE(ffffff00625a20d0,ffff8000210a2bd0,ffffff007f7c7ba0,1) at VOP_CLOSE+0x5f sys/kern/vfs_vops.c:174 vn_closefile(ffff8000210a2bd0,ffffff00665269e8) at vn_closefile+0x10c vn_close sys/kern/vfs_vnops.c:289 [inline] vn_closefile(ffff8000210a2bd0,ffffff00665269e8) at vn_closefile+0x10c sys/kern/vfs_vnops.c:575 fdrop(ffffff00665269e8,ffff8000210a2bd0) at fdrop+0xa4 sys/kern/kern_descrip.c:1260 closef(ffff8000210a2bd0,ffffff006e92e008) at closef+0xd7 sys/kern/kern_descrip.c:1244 fdfree(ffff8000210b6998) at fdfree+0x99 sys/kern/kern_descrip.c:1176 exit1(10,ffff8000210a2bd0,0) at exit1+0x22f sys/kern/kern_exit.c:194 sys_exit(ffffffff81b9fc13,ffff8000211bd8d0,10) at sys_exit+0x13 sys/kern/kern_exit.c:94 syscall(0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,1,0,1,0,7f7ffffde200) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffde1b0, count: -11 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000211bd690 rbx 0xffffffff81796990 wsmuxclose rdx 0x64 rcx 0xffff800021018ff0 rax 0 r8 0x7f7fffffc000 r9 0x1 r10 0xffff8000211bd4b8 r11 0xffffffff814108a0 x86_bus_space_io_write_1 r12 0xffff80000064f200 r13 0x4501 __ALIGN_SIZE+0x3501 r14 0xffff80000064f250 r15 0xffffffffffffffff rip 0xffffffff817969f5 wsmuxclose+0x65 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000211bd670 ss 0x10 wsmuxclose+0x65: cmpq %r12,0x90(%r15) ddb{1}> show proc PROC (syz-executor1) pid=507082 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a2e28,0xffff8000210a3090 process=0xffff8000210b6998 user=0xffff8000211b8000, vmspace=0xffffff007f124528 estcpu=28, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1917 297873 32658 0 2 0 syz-executor0 1917 261074 32658 0 2 0x4000000 syz-executor0 569 145625 1 0 3 0x100083 ttyin getty 44861 127338 0 0 3 0x14200 bored sosplice 12856 278885 81153 0 2 0x482 syz-executor1 32658 142332 81153 0 2 0x482 syz-executor0 81153 476057 60374 0 3 0x82 thrsleep syz-fuzzer 81153 155730 60374 0 2 0x4000482 syz-fuzzer 81153 329633 60374 0 3 0x4000082 thrsleep syz-fuzzer 81153 333670 60374 0 3 0x4000082 thrsleep syz-fuzzer 81153 165913 60374 0 3 0x4000082 thrsleep syz-fuzzer 81153 396983 60374 0 3 0x4000082 thrsleep syz-fuzzer 81153 115873 60374 0 3 0x4000082 thrsleep syz-fuzzer 81153 475179 60374 0 3 0x4000082 kqread syz-fuzzer 81153 206088 60374 0 2 0x4000482 syz-fuzzer 81153 273692 60374 0 3 0x4000082 thrsleep syz-fuzzer 60374 130582 58264 0 3 0x10008a pause ksh 58264 513131 68983 0 3 0x92 select sshd 68983 67098 1 0 3 0x80 select sshd 59408 289724 4515 73 2 0x100090 syslogd 4515 233848 1 0 3 0x100082 netio syslogd 77980 503072 1 77 3 0x100090 poll dhclient 91834 346792 1 0 3 0x80 poll dhclient 34848 410603 0 0 3 0x14200 pgzero zerothread 72262 281739 0 0 3 0x14200 aiodoned aiodoned 18967 113475 0 0 2 0x14200 update 66764 494208 0 0 3 0x14200 cleaner cleaner 90301 124817 0 0 3 0x14200 reaper reaper 6466 442084 0 0 3 0x14200 pgdaemon pagedaemon 21412 409689 0 0 3 0x14200 bored crynlk 59013 246123 0 0 3 0x14200 bored crypto 53093 405795 0 0 3 0x40014200 acpi0 acpi0 72912 521041 0 0 3 0x40014200 idle1 41164 324260 0 0 2 0x14200 softnet 94474 427565 0 0 2 0x14200 systqmp 3634 318134 0 0 3 0x14200 bored systq 32350 275376 0 0 7 0x40014200 softclock 50665 54869 0 0 3 0x40014200 idle0 1 320285 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper