uvm_fault(0xffffff003f12b000, 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(0xffffff003f12b000, 0x6000100, 0, 1) -> e switchwrite(ffffff00399e0ea0,ffffff00399e0ea0,ffff800014aca5f8) at switchwrite+0x98 sys/net/switchctl.c:234 end trace frame: 0xffff800014aca4d0, count: 0 ddb> trace switchwrite(ffffff00399e0ea0,ffffff00399e0ea0,ffff800014aca5f8) at switchwrite+0x98 sys/net/switchctl.c:234 spec_write(ffffffff81e28fa0) at spec_write+0xa0 sys/kern/spec_vnops.c:310 VOP_WRITE(2e,ffffff00399e0ea0,1,ffff800014aca5f8) at VOP_WRITE+0x65 sys/kern/vfs_vops.c:268 vn_write(ffffff0030750e98,ffff800014aca5f8,2e) at vn_write+0x127 sys/kern/vfs_vnops.c:397 dofilewritev(ffff8000ffffc968,ffff800014aca6a0,2e,ffff800014aca6b8,74d46353c98) at dofilewritev+0x13e sys/kern/sys_generic.c:364 sys_write(ffff800014aca740,ffff8000ffffc968,ffff8000149cffd0) at sys_write+0x6e sys/kern/sys_generic.c:283syscall(0) at syscall+0x3e4 Xsyscall(6,0,c,0,3,74a54441010) at Xsyscall+0x128 end of kernel end trace frame: 0x74d46353d20, count: -8 ddb> show registers rdi 0xffffffff81e16280 switch_ifs_lk rsi 0xffffffff81904ef5 switchwrite+0x95 rbp 0xffff800014aca450 rbx 0x6000100 __kernel_end_phys+0x4000100 rdx 0xffff800002ace000 rcx 0x4e rax 0xffff800002ace000 r8 0xffff800014aca6a0 r9 0 r10 0 r11 0xffffffff81904e60 switchwrite r12 0x2e r13 0x6000100 __kernel_end_phys+0x4000100 r14 0xffff800001b17b00 r15 0xffff800014aca5f8 rip 0xffffffff81904ef8 switchwrite+0x98 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800014aca3f0 ss 0x10 switchwrite+0x98: movq 0(%r13),%rbx ddb> show proc PROC (syz-executor1) pid=337277 stat=onproc flags process=0 proc=4000000 pri=82, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffc710,0xffff8000ffffd080 process=0xffff8000149cffd0 user=0xffff800014ac5000, vmspace=0xffffff003f12b000 estcpu=32, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 85629 129094 83773 0 3 0x80 nanosleep syz-executor0 85629 72142 83773 0 3 0x4000080 select syz-executor0 85629 25730 83773 0 3 0x4000080 fsleep syz-executor0 44177 31013 81125 0 2 0 syz-executor1 *44177 337277 81125 0 7 0x4000000 syz-executor1 44177 255068 81125 0 3 0x4000080 fsleep syz-executor1 44177 360467 81125 0 2 0x4000000 syz-executor1 72001 85667 0 0 3 0x14200 bored sosplice 81125 182547 46671 0 3 0x82 nanosleep syz-executor1 83773 50 46671 0 3 0x82 nanosleep syz-executor0 46671 282506 777 0 3 0x82 thrsleep syz-fuzzer 46671 442259 777 0 3 0x4000082 thrsleep syz-fuzzer 46671 79590 777 0 3 0x4000082 thrsleep syz-fuzzer 46671 391271 777 0 3 0x4000082 kqread syz-fuzzer 46671 487202 777 0 3 0x4000082 thrsleep syz-fuzzer 46671 18697 777 0 3 0x4000082 thrsleep syz-fuzzer 46671 244804 777 0 3 0x4000082 thrsleep syz-fuzzer 777 334069 29140 0 3 0x10008a pause ksh 29140 292772 55923 0 3 0x92 select sshd 55923 390810 1 0 3 0x80 select sshd 14205 442106 37599 73 2 0x100090 syslogd 37599 346491 1 0 3 0x100082 netio syslogd 14869 203814 0 0 2 0x14200 zerothread 50984 375140 0 0 3 0x14200 aiodoned aiodoned 62889 471038 0 0 3 0x14200 syncer update 25103 429964 0 0 3 0x14200 cleaner cleaner 30283 58649 0 0 3 0x14200 reaper reaper 14850 458655 0 0 3 0x14200 pgdaemon pagedaemon 93738 59008 0 0 3 0x14200 bored crynlk 93423 467140 0 0 3 0x14200 bored crypto 46231 144683 0 0 3 0x40014200 acpi0 acpi0 1750 191207 0 0 3 0x14200 bored softnet 8984 506694 0 0 3 0x14200 bored systqmp 74819 237498 0 0 3 0x14200 bored systq 13019 435074 0 0 3 0x40014200 bored softclock 42017 491711 0 0 3 0x40014200 idle0 1 10284 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper