uvm_fault(0xffffff003f12bb58, 0x6000100, 0, 1) -> e kernel: page fault trap, code=0 Stopped at switchwrite+0x98: movq 0(%r13),%rbx ddb> ddb> set $lines = 0 ddb> show panic kernel page fault uvm_fault(0xffffff003f12bb58, 0x6000100, 0, 1) -> e switchwrite(ffffff002c87f0a0,ffffff002c87f0a0,ffff800014aedb68) at switchwrite+0x98 sys/net/switchctl.c:234 end trace frame: 0xffff800014aeda40, count: 0 ddb> trace switchwrite(ffffff002c87f0a0,ffffff002c87f0a0,ffff800014aedb68) at switchwrite+0x98 sys/net/switchctl.c:234 spec_write(ffffffff81e2a858) at spec_write+0xa0 sys/kern/spec_vnops.c:310 VOP_WRITE(2e,ffffff002c87f0a0,1,ffff800014aedb68) at VOP_WRITE+0x65 sys/kern/vfs_vops.c:268 vn_write(ffffff003080a538,ffff800014aedb68,2e) at vn_write+0x127 sys/kern/vfs_vnops.c:397 dofilewritev(ffff8000ffffc008,ffff800014aedc10,2e,ffff800014aedc28,8ebc6a57f38) at dofilewritev+0x13e sys/kern/sys_generic.c:364 sys_write(ffff800014aedcb0,ffff8000ffffc008,ffff8000149cf008) at sys_write+0x6e sys/kern/sys_generic.c:283syscall(0) at syscall+0x3e4 Xsyscall(6,0,c,0,3,8e975ce9010) at Xsyscall+0x128 end of kernel end trace frame: 0x8ebc6a57fc0, count: -8 ddb> show registers rdi 0xffffffff81dfee98 switch_ifs_lk rsi 0xffffffff81438fd5 switchwrite+0x95 rbp 0xffff800014aed9c0 rbx 0x6000100 __kernel_end_phys+0x4000100 rdx 0xffff800002acd000 rcx 0x49 rax 0xffff800002acd000 r8 0xffff800014aedc10 r9 0 r10 0 r11 0xffffffff81438f40 switchwrite r12 0x2e r13 0x6000100 __kernel_end_phys+0x4000100 r14 0xffff800000aa3e80 r15 0xffff800014aedb68 rip 0xffffffff81438fd8 switchwrite+0x98 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800014aed960 ss 0x10 switchwrite+0x98: movq 0(%r13),%rbx ddb> show proc PROC (syz-executor0) pid=276527 stat=onproc flags process=0 proc=4000000 pri=83, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffce18,0xffff8000ffffcbd0 process=0xffff8000149cf008 user=0xffff800014ae8000, vmspace=0xffffff003f12bb58 estcpu=33, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 55209 423776 87948 0 2 0 syz-executor0 *55209 276527 87948 0 7 0x4000000 syz-executor0 55209 151566 87948 0 3 0x4000080 fsleep syz-executor0 55209 433215 87948 0 3 0x4000080 fsleep syz-executor0 55209 330623 87948 0 3 0x4000080 fsleep syz-executor0 71040 164953 1 0 3 0x100083 ttyin getty 81570 305755 0 0 3 0x14200 bored sosplice 87948 380574 52047 0 3 0x82 nanosleep syz-executor0 22272 279492 52047 0 3 0x82 piperd syz-executor1 52047 161887 18559 0 3 0x82 thrsleep syz-fuzzer 52047 449881 18559 0 3 0x4000082 thrsleep syz-fuzzer 52047 193067 18559 0 3 0x4000082 thrsleep syz-fuzzer 52047 119485 18559 0 3 0x4000082 kqread syz-fuzzer 52047 286050 18559 0 3 0x4000082 thrsleep syz-fuzzer 52047 229972 18559 0 3 0x4000082 thrsleep syz-fuzzer 52047 512505 18559 0 3 0x4000082 thrsleep syz-fuzzer 18559 470111 93415 0 3 0x10008a pause ksh 93415 364317 89319 0 3 0x92 select sshd 89319 187847 1 0 3 0x80 select sshd 18900 455951 68009 73 2 0x100090 syslogd 68009 288327 1 0 3 0x100082 netio syslogd 46133 330767 1 77 3 0x100090 poll dhclient 68201 170581 1 0 3 0x80 poll dhclient 97908 313094 0 0 2 0x14200 zerothread 30768 425477 0 0 3 0x14200 aiodoned aiodoned 58349 296847 0 0 3 0x14200 syncer update 65305 277196 0 0 3 0x14200 cleaner cleaner 51735 65396 0 0 3 0x14200 reaper reaper 81546 135431 0 0 3 0x14200 pgdaemon pagedaemon 75057 14494 0 0 3 0x14200 bored crynlk 72393 209702 0 0 3 0x14200 bored crypto 92406 196585 0 0 3 0x40014200 acpi0 acpi0 36876 406077 0 0 3 0x14200 bored softnet 8974 486072 0 0 3 0x14200 bored systqmp 31821 360222 0 0 3 0x14200 bored systq 9544 478687 0 0 3 0x40014200 bored softclock 80252 176725 0 0 3 0x40014200 idle0 1 346252 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper