uvm_fault(0xffffff003f12c318, 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(0xffffff003f12c318, 0x600011c, 0, 1) -> e m_free(6000100) at m_free+0x2a sys/kern/uipc_mbuf.c:423 end trace frame: 0xffff800014a282e0, count: 0 ddb> trace m_free(6000100) at m_free+0x2a sys/kern/uipc_mbuf.c:423 mq_purge(ffff800002acdf80) at mq_purge+0x6d m_freem sys/kern/uipc_mbuf.c:525 [inline] mq_purge(ffff800002acdf80) at mq_purge+0x6d ml_purge sys/kern/uipc_mbuf.c:1591 [inline] mq_purge(ffff800002acdf80) at mq_purge+0x6d sys/kern/uipc_mbuf.c:1695 switchclose(ffff8000ffffc260,ffff800014a28358,ffffffff813b3c17,ffff800014a28300) at switchclose+0x77 sys/net/switchctl.c:323 spec_close(ffffffff81e27418) at spec_close+0x271 sys/kern/spec_vnops.c:553 VOP_CLOSE(ffffff00378cd3f8,ffff8000ffffc260,ffffff003f7c78a0,3) at VOP_CLOSE+0x5f sys/kern/vfs_vops.c:174 vn_closefile(ffff8000ffffc260,ffffff003065df10) at vn_closefile+0xfc vn_close sys/kern/vfs_vnops.c:289 [inline] vn_closefile(ffff8000ffffc260,ffffff003065df10) at vn_closefile+0xfc sys/kern/vfs_vnops.c:575 fdrop(ffffff003065df10,ffff8000ffffc260) at fdrop+0xa4 sys/kern/kern_descrip.c:1260 closef(ffff8000ffffc260,ffffff00365e9ba0) at closef+0xd5 sys/kern/kern_descrip.c:1244 fdfree(ffff8000149cf980) at fdfree+0x98 sys/kern/kern_descrip.c:1176 exit1(ffff800014a28620,ffff8000ffffc260,ffff8000149cf980) at exit1+0x22f sys/kern/kern_exit.c:194 sys_exit(ffffffff81658563,ffff800014a28540,ffff800014a28620) at sys_exit+0x13 sys/kern/kern_exit.c:94 syscall(0) at syscall+0x3e4 Xsyscall(6,1,0,1,0,7f7fffff65a0) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff6550, count: -13 ddb> show registers rdi 0x7 rsi 0xf0 rbp 0xffff800014a282b0 rbx 0xffffffff813b3ba0 switchclose rdx 0xffff800014a281c0 rcx 0xffffffff81e41c70 mbstat_boot_boot_cpumem rax 0 r8 0 r9 0 r10 0 r11 0xffffffff81b798b0 pool_lock_mtx_leave r12 0 r13 0x236161bc r14 0x6000100 __kernel_end_phys+0x4000100 r15 0x6000100 __kernel_end_phys+0x4000100 rip 0xffffffff813df20a m_free+0x2a cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff800014a28290 ss 0x10 m_free+0x2a: movswq 0x1c(%r14),%rdx ddb> show proc PROC (syz-executor0) pid=326419 stat=onproc flags process=1008 proc=2000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffc710,0xffffffff81ebb3f8 process=0xffff8000149cf980 user=0xffff800014a23000, vmspace=0xffffff003f12c318 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 7813 1193 0 0 3 0x14200 bored sosplice 41272 422143 1 0 3 0x100083 ttyin getty 97477 160354 25606 0 3 0x82 nanosleep syz-executor1 53911 5705 25606 0 3 0x82 nanosleep syz-executor0 25606 71518 69406 0 3 0x82 thrsleep syz-fuzzer 25606 56353 69406 0 3 0x4000082 thrsleep syz-fuzzer 25606 390942 69406 0 3 0x4000082 thrsleep syz-fuzzer 25606 108018 69406 0 3 0x4000082 kqread syz-fuzzer 25606 29089 69406 0 3 0x4000082 thrsleep syz-fuzzer 25606 57116 69406 0 3 0x4000082 thrsleep syz-fuzzer 25606 274453 69406 0 3 0x4000082 thrsleep syz-fuzzer 69406 37647 51399 0 3 0x10008a pause ksh 51399 129438 15106 0 3 0x92 select sshd 15106 2714 1 0 3 0x80 select sshd 25452 56510 31001 73 2 0x100090 syslogd 31001 71209 1 0 3 0x100082 netio syslogd 66181 493642 1 77 3 0x100090 poll dhclient 15889 407917 1 0 3 0x80 poll dhclient 331 332129 0 0 2 0x14200 zerothread 32806 116860 0 0 3 0x14200 aiodoned aiodoned 19695 512943 0 0 3 0x14200 syncer update 14551 117940 0 0 3 0x14200 cleaner cleaner 81488 283375 0 0 3 0x14200 reaper reaper 23449 273437 0 0 3 0x14200 pgdaemon pagedaemon 3640 120386 0 0 3 0x14200 bored crynlk 11337 60477 0 0 3 0x14200 bored crypto 81654 199109 0 0 3 0x40014200 acpi0 acpi0 14478 452882 0 0 3 0x14200 bored softnet 27551 377328 0 0 3 0x14200 bored systqmp 52177 129612 0 0 3 0x14200 bored systq 61896 431389 0 0 3 0x40014200 bored softclock 53633 262378 0 0 3 0x40014200 idle0 1 410357 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper