uvm_fault(0xffffff007f12b528, 0x600011c, 0, 1) -> e kernel: page fault trap, code=0 Stopped at m_free+0x2a: movswq 0x1c(%r14),%rdx ddb> ddb> set $lines = 0 ddb> show panic kernel page fault uvm_fault(0xffffff007f12b528, 0x600011c, 0, 1) -> e m_free(6000100) at m_free+0x2a end trace frame: 0xffff8000210b8200, count: 0 ddb> trace m_free(6000100) at m_free+0x2a mq_purge(ffff800001b08400) at mq_purge+0x6d switchclose(ffff8000ffffd2c8,ffff8000210b8278,ffffffff81770467,ffff8000210b8220) at switchclose+0x77 spec_close(ffffffff81e20158) at spec_close+0x271 VOP_CLOSE(ffffff00655b3ad8,ffff8000ffffd2c8,ffffff007f7c79c0,3) at VOP_CLOSE+0x5f vn_closefile(ffff8000ffffd2c8,ffffff00689f4bc8) at vn_closefile+0xfc fdrop(ffffff00689f4bc8,ffff8000ffffd2c8) at fdrop+0xa4 closef(ffff8000ffffd2c8,ffffff006e9d41b0) at closef+0xd5 fdfree(ffff80002105f658) at fdfree+0x98 exit1(ffff8000210b8540,ffff8000ffffd2c8,ffff80002105f658) at exit1+0x22f sys_exit(ffffffff81519e33,ffff8000210b8460,ffff8000210b8540) at sys_exit+0x13 syscall(0) at syscall+0x3e4 Xsyscall(6,1,0,1,0,7f7ffffed710) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffed6c0, count: -13 ddb> show registers rdi 0x7 rsi 0xf0 rbp 0xffff8000210b81d0 rbx 0xffffffff817703f0 switchclose rdx 0xffff8000210b80e0 rcx 0xffffffff81e91720 mbstat_boot_boot_cpumem rax 0 r8 0 r9 0 r10 0 r11 0xffffffff815929a0 pool_lock_mtx_leave r12 0xffffff006efe4700 r13 0x236161bc r14 0x6000100 __kernel_end_phys+0x4000100 r15 0x6000100 __kernel_end_phys+0x4000100 rip 0xffffffff81baed8a m_free+0x2a cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff8000210b81b0 ss 0x10 m_free+0x2a: movswq 0x1c(%r14),%rdx ddb> show proc PROC (syz-executor1) pid=454012 stat=onproc flags process=1008 proc=2000 pri=50, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000210ac298,0xffffffff81ea6dd0 process=0xffff80002105f658 user=0xffff8000210b3000, vmspace=0xffffff007f12b528 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 52102 376292 1 0 3 0x100083 ttyin getty 71787 200272 0 0 3 0x14200 bored sosplice 97286 203818 46005 0 3 0x2 biowait syz-executor0 67462 411732 46005 0 3 0x82 nanosleep syz-executor1 46005 424944 52834 0 3 0x82 thrsleep syz-fuzzer 46005 300453 52834 0 3 0x4000082 nanosleep syz-fuzzer 46005 322476 52834 0 3 0x4000082 thrsleep syz-fuzzer 46005 184986 52834 0 3 0x4000082 thrsleep syz-fuzzer 46005 360838 52834 0 3 0x4000082 kqread syz-fuzzer 46005 63025 52834 0 3 0x4000082 thrsleep syz-fuzzer 46005 124649 52834 0 3 0x4000082 thrsleep syz-fuzzer 52834 423098 96244 0 3 0x10008a pause ksh 96244 3043 61607 0 3 0x92 select sshd 61607 137359 1 0 3 0x80 select sshd 73955 389637 95337 73 2 0x100090 syslogd 95337 340649 1 0 3 0x100082 netio syslogd 83494 225056 1 77 3 0x100090 poll dhclient 28894 183557 1 0 3 0x80 poll dhclient 6818 13833 0 0 2 0x14200 zerothread 71114 386224 0 0 3 0x14200 aiodoned aiodoned 3764 177263 0 0 3 0x14200 syncer update 13032 293235 0 0 3 0x14200 cleaner cleaner 34990 423845 0 0 3 0x14200 reaper reaper 45863 79321 0 0 3 0x14200 pgdaemon pagedaemon 6460 383539 0 0 3 0x14200 bored crynlk 71988 360875 0 0 3 0x14200 bored crypto 72426 160585 0 0 3 0x40014200 acpi0 acpi0 28177 309694 0 0 3 0x14200 bored softnet 26996 229322 0 0 3 0x14200 bored systqmp 31494 52592 0 0 3 0x14200 bored systq 9546 249840 0 0 3 0x40014200 bored softclock 85550 343133 0 0 3 0x40014200 idle0 1 257404 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper