uvm_fault(0xffffff003c4f0218, 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(0xffffff003c4f0218, 0x6000100, 0, 1) -> e switchwrite(ffffff003ca55040,ffffff003ca55040,ffff800014aa9e28) at switchwrite+0x98 end trace frame: 0xffff800014aa9d00, count: 0 ddb> trace switchwrite(ffffff003ca55040,ffffff003ca55040,ffff800014aa9e28) at switchwrite+0x98 spec_write(ffffffff81e300a8) at spec_write+0xa0 VOP_WRITE(2e,ffffff003ca55040,1,ffff800014aa9e28) at VOP_WRITE+0x65 vn_write(ffffff0029dae2d0,ffff800014aa9e28,2e) at vn_write+0x127 dofilewritev(ffff800014acd798,ffff800014aa9ed0,2e,ffff800014aa9ee8,7f21c121348) at dofilewritev+0x13e sys_write(ffff800014aa9f70,ffff800014acd798,ffff8000149f9990) at sys_write+0x6esyscall(0) at syscall+0x3e4 Xsyscall(0,0,c,0,3,7ef2f969010) at Xsyscall+0x128 end of kernel end trace frame: 0x7f21c1213d0, count: -8 ddb> show registers rdi 0xffffffff81e303d0 switch_ifs_lk rsi 0xffffffff812450a5 switchwrite+0x95 rbp 0xffff800014aa9c80 rbx 0x6000100 __kernel_end_phys+0x4000100 rdx 0xffff800000acd000 rcx 0x48 rax 0xffff800000acd000 r8 0xffff800014aa9ed0 r9 0 r10 0 r11 0xffffffff81245010 switchwrite r12 0x2e r13 0x6000100 __kernel_end_phys+0x4000100 r14 0xffff800001b25180 r15 0xffff800014aa9e28 rip 0xffffffff812450a8 switchwrite+0x98 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800014aa9c20 ss 0x10 switchwrite+0x98: movq 0(%r13),%rbx ddb> show proc PROC (syz-executor0) pid=287828 stat=onproc flags process=0 proc=4000000 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800014acce38,0xffff800014acda00 process=0xffff8000149f9990 user=0xffff800014aa5000, vmspace=0xffffff003c4f0218 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 24753 204133 82990 0 2 0 syz-executor0 *24753 287828 82990 0 7 0x4000000 syz-executor0 24753 375181 82990 0 3 0x4000080 fsleep syz-executor0 96142 300960 13513 0 3 0x82 netio sshd 35310 162686 1 0 3 0x100083 ttyin getty 2851 6136 0 0 3 0x14200 bored sosplice 82990 70444 99954 0 3 0x82 nanosleep syz-executor0 91551 142491 99954 0 2 0x2 syz-executor1 99954 447383 718 0 3 0x82 thrsleep syz-fuzzer 99954 114472 718 0 2 0x4000482 syz-fuzzer 99954 48268 718 0 3 0x4000082 thrsleep syz-fuzzer 99954 444212 718 0 3 0x4000082 kqread syz-fuzzer 99954 121954 718 0 3 0x4000082 thrsleep syz-fuzzer 99954 46714 718 0 3 0x4000082 thrsleep syz-fuzzer 99954 524266 718 0 3 0x4000082 thrsleep syz-fuzzer 718 26619 9681 0 3 0x10008a pause ksh 9681 194248 13513 0 3 0x92 select sshd 13513 312689 1 0 3 0x80 select sshd 9617 57182 43399 73 2 0x100090 syslogd 43399 440302 1 0 3 0x100082 netio syslogd 13522 199999 1 77 3 0x100090 poll dhclient 73087 346411 1 0 3 0x80 poll dhclient 97552 161351 0 0 2 0x14200 zerothread 77678 127426 0 0 3 0x14200 aiodoned aiodoned 35586 192138 0 0 3 0x14200 syncer update 99772 193475 0 0 3 0x14200 cleaner cleaner 23862 185151 0 0 3 0x14200 reaper reaper 35630 275117 0 0 3 0x14200 pgdaemon pagedaemon 7909 477287 0 0 3 0x14200 bored crynlk 6363 475118 0 0 3 0x14200 bored crypto 34449 33418 0 0 3 0x40014200 acpi0 acpi0 77634 149823 0 0 3 0x14200 bored softnet 86776 509814 0 0 3 0x14200 bored systqmp 34049 228171 0 0 3 0x14200 bored systq 2407 248127 0 0 3 0x40014200 bored softclock 31564 96393 0 0 3 0x40014200 idle0 1 24103 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper