uvm_fault(0xffffff003f12b108, 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(0xffffff003f12b108, 0x600011c, 0, 1) -> e m_free(6000100) at m_free+0x2a sys/kern/uipc_mbuf.c:423 end trace frame: 0xffff800014aca960, count: 0 ddb> trace m_free(6000100) at m_free+0x2a sys/kern/uipc_mbuf.c:423 mq_purge(ffff8000048ce900) at mq_purge+0x6d m_freem sys/kern/uipc_mbuf.c:525 [inline] mq_purge(ffff8000048ce900) at mq_purge+0x6d ml_purge sys/kern/uipc_mbuf.c:1591 [inline] mq_purge(ffff8000048ce900) at mq_purge+0x6d sys/kern/uipc_mbuf.c:1695 switchclose(ffff8000ffffd070,ffff800014aca9d8,ffffffff81905297,ffff800014aca980) at switchclose+0x77 sys/net/switchctl.c:323 spec_close(ffffffff81e28fa0) at spec_close+0x271 sys/kern/spec_vnops.c:553 VOP_CLOSE(ffffff0028bf4068,ffff8000ffffd070,ffffff003f7c7660,3) at VOP_CLOSE+0x5f sys/kern/vfs_vops.c:174 vn_closefile(ffff8000ffffd070,ffffff00376901e0) at vn_closefile+0xfc vn_close sys/kern/vfs_vnops.c:289 [inline] vn_closefile(ffff8000ffffd070,ffffff00376901e0) at vn_closefile+0xfc sys/kern/vfs_vnops.c:575 fdrop(ffffff00376901e0,ffff8000ffffd070) at fdrop+0xa4 sys/kern/kern_descrip.c:1260 closef(ffff8000ffffd070,ffffff003f7c6000) at closef+0xd5 sys/kern/kern_descrip.c:1244 fdfree(ffff8000149cf330) at fdfree+0x98 sys/kern/kern_descrip.c:1176 exit1(ffff800014acaca0,ffff8000ffffd070,ffff8000149cf330) at exit1+0x22f sys/kern/kern_exit.c:194 sys_exit(ffffffff811388a3,ffff800014acabc0,ffff800014acaca0) at sys_exit+0x13 sys/kern/kern_exit.c:94 syscall(0) at syscall+0x3e4 Xsyscall(6,1,0,1,0,7f7ffffe14d0) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe1480, count: -13 ddb> show registers rdi 0x7 rsi 0xf0 rbp 0xffff800014aca930 rbx 0xffffffff81905220 switchclose rdx 0xffff800014aca840 rcx 0xffffffff81e3f090 mbstat_boot_boot_cpumem rax 0 r8 0 r9 0 r10 0 r11 0xffffffff819181c0 pool_lock_mtx_leave r12 0 r13 0x236161bc r14 0x6000100 __kernel_end_phys+0x4000100 r15 0x6000100 __kernel_end_phys+0x4000100 rip 0xffffffff810fc5aa m_free+0x2a cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff800014aca910 ss 0x10 m_free+0x2a: movswq 0x1c(%r14),%rdx ddb> show proc PROC (syz-executor1) pid=390009 stat=onproc flags process=1008 proc=2000 pri=50, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffcbc0,0xffffffff81ebb720 process=0xffff8000149cf330 user=0xffff800014ac5000, vmspace=0xffffff003f12b108 estcpu=32, cpticks=1, pctcpu=0.1 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 25848 76895 40175 0 3 0x80 nanosleep syz-executor0 25848 125663 40175 0 3 0x4000080 ttyin syz-executor0 35315 482831 0 0 3 0x14200 bored sosplice 40175 314379 16071 0 3 0x82 nanosleep syz-executor0 5862 470034 16071 0 3 0x82 nanosleep syz-executor1 16071 85329 16260 0 3 0x82 thrsleep syz-fuzzer 16071 80900 16260 0 3 0x4000082 thrsleep syz-fuzzer 16071 443853 16260 0 3 0x4000082 thrsleep syz-fuzzer 16071 155493 16260 0 3 0x4000082 thrsleep syz-fuzzer 16071 466405 16260 0 3 0x4000082 thrsleep syz-fuzzer 16071 384198 16260 0 3 0x4000082 thrsleep syz-fuzzer 16071 164416 16260 0 3 0x4000082 kqread syz-fuzzer 16260 225338 99042 0 3 0x10008a pause ksh 99042 310838 51330 0 3 0x92 select sshd 86158 82256 1 0 3 0x100083 ttyin getty 51330 106893 1 0 3 0x80 select sshd 98947 81537 3172 73 2 0x100090 syslogd 3172 281863 1 0 3 0x100082 netio syslogd 37297 518205 0 0 2 0x14200 zerothread 37483 466545 0 0 3 0x14200 aiodoned aiodoned 83172 484532 0 0 3 0x14200 syncer update 77667 237508 0 0 3 0x14200 cleaner cleaner 66950 260298 0 0 3 0x14200 reaper reaper 80194 239553 0 0 3 0x14200 pgdaemon pagedaemon 16908 90415 0 0 3 0x14200 bored crynlk 75201 3354 0 0 3 0x14200 bored crypto 36869 424563 0 0 3 0x40014200 acpi0 acpi0 72332 61139 0 0 3 0x14200 bored softnet 13625 96032 0 0 3 0x14200 bored systqmp 31010 141841 0 0 3 0x14200 bored systq 40569 21611 0 0 3 0x40014200 bored softclock 25188 286086 0 0 3 0x40014200 idle0 1 208745 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper