uvm_fault(0xffffffff82542550, 0xfffffd0000000008, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ml_purge+0x38: movq 0x8(%r12),%r12 ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xffffffff82542550, 0xfffffd0000000008, 0, 1) -> e ml_purge(ffff80001f649c78) at ml_purge+0x38 sys/kern/uipc_mbuf.c:1627 end trace frame: 0xffff80001f649cc0, count: 0 ddb> trace ml_purge(ffff80001f649c78) at ml_purge+0x38 sys/kern/uipc_mbuf.c:1627 ifq_purge(ffff800000a00278) at ifq_purge+0x97 sys/net/ifq.c:462 tun_dev_close(5d00,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460 spec_close(ffff80001f649da0) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd806b3d7dd0,7,fffffd806c3be9c0,ffff80001d349008) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd8056909cb8,ffff80001d349008) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8056909cb8,ffff80001d349008) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:610 fdrop(fffffd8056909cb8,ffff80001d349008) at fdrop+0xc2 sys/kern/kern_descrip.c:1271 closef(fffffd8056909cb8,ffff80001d349008) at closef+0x118 sys/kern/kern_descrip.c:1255 fdfree(ffff80001d349008) at fdfree+0x100 sys/kern/kern_descrip.c:1187 exit1(ffff80001d349008,0,19,1) at exit1+0x334 sys/kern/kern_exit.c:196 postsig(ffff80001d349008,19) at postsig+0x4a8 sigexit sys/kern/kern_sig.c:1476 [inline] postsig(ffff80001d349008,19) at postsig+0x4a8 sys/kern/kern_sig.c:1408 userret(ffff80001d349008) at userret+0x159 sys/kern/kern_sig.c:1860 syscall(ffff80001f64a220) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001f64a220) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2f10, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff80001f649c60 rbx 0 rdx 0xffff80001f649ad0 rcx 0x1000 __ALIGN_SIZE rax 0 r8 0 r9 0x5 r10 0x7da6143de44cc305 r11 0xd21e5505631469bf r12 0xfffffd0000000000 r13 0x2000 __ALIGN_SIZE+0x1000 r14 0xffff80001f649c78 r15 0xfffffd0000000000 rip 0xffffffff812b6bd8 ml_purge+0x38 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001f649c30 ss 0x10 ml_purge+0x38: movq 0x8(%r12),%r12 ddb> show proc PROC (syz-executor.0) pid=488334 stat=onproc flags process=a proc=2000 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80001d349ea8,0xffff80001d3494f8 process=0xffff80001d39f880 user=0xffff80001f645000, vmspace=0xfffffd806bc09330 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 76792 327470 1 0 3 0x100083 ttyin getty 81987 481066 1872 0 3 0x82 nanosleep syz-executor.1 23990 82806 0 0 3 0x14200 bored sosplice 1872 194459 10562 0 3 0x82 thrsleep syz-fuzzer 1872 372404 10562 0 3 0x4000082 thrsleep syz-fuzzer 1872 493805 10562 0 2 0x4000082 syz-fuzzer 1872 313964 10562 0 3 0x4000082 thrsleep syz-fuzzer 1872 183408 10562 0 3 0x4000082 thrsleep syz-fuzzer 1872 244060 10562 0 3 0x4000082 thrsleep syz-fuzzer 1872 197458 10562 0 3 0x4000082 thrsleep syz-fuzzer 10562 145131 75332 0 3 0x10008a pause ksh 75332 11849 98938 0 2 0x92 sshd 98938 255952 1 0 2 0x80 sshd 59967 320830 69837 73 3 0x100090 kqread syslogd 69837 131975 1 0 3 0x100082 netio syslogd 68056 452082 1 77 2 0x100090 dhclient 93384 187949 1 0 2 0x80 dhclient 92534 443679 0 0 2 0x14200 zerothread 79889 329788 0 0 3 0x14200 aiodoned aiodoned 41449 327271 0 0 3 0x14200 syncer update 28179 424118 0 0 3 0x14200 cleaner cleaner 75622 139250 0 0 3 0x14200 reaper reaper 95970 235144 0 0 3 0x14200 pgdaemon pagedaemon 91083 468577 0 0 3 0x14200 bored crynlk 95746 103901 0 0 3 0x14200 bored crypto 12338 309156 0 0 3 0x40014200 acpi0 acpi0 14618 69586 0 0 3 0x14200 bored softnet 79683 46367 0 0 3 0x14200 bored systqmp 88382 148994 0 0 2 0x14200 systq 7900 471450 0 0 2 0x40014200 softclock 13899 5785 0 0 3 0x40014200 idle0 45999 87402 0 0 3 0x14200 bored smr 1 370979 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9515 6356K 7001K 78643K 11643 0 pcb 13 8K 8K 78643K 101 0 rtable 114 3K 4K 78643K 340 0 ifaddr 77 14K 15K 78643K 143 0 counters 21 16K 16K 78643K 32 0 ioctlops 0 0K 2K 78643K 34 0 iov 0 0K 16K 78643K 84 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1614 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 15 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 4 9K 25K 78643K 473 0 sigio 0 0K 0K 78643K 11 0 proc 51 38K 55K 78643K 441 0 subproc 23 1K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 145 0 in_multi 46 2K 2K 78643K 91 0 ether_multi 1 0K 0K 78643K 16 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 243 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 118 70K 70K 78643K 2025 0 UVM aobj 32 2K 2K 78643K 32 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 75 0 NDP 13 0K 0K 78643K 30 0 temp 135 3018K 3088K 78643K 26895 0 kqueue 3 4K 14K 78643K 46 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 9 0 2 1 0 1 1 0 8 0 rtpcb 80 47 0 45 1 0 1 1 0 8 0 rtentry 112 59 0 12 2 0 2 2 0 8 0 unpcb 120 243 0 235 1 0 1 1 0 8 0 syncache 264 7 0 7 2 2 0 1 0 8 0 tcpqe 32 154 0 154 1 1 0 1 0 8 0 tcpcb 544 729 0 725 3 1 2 2 0 8 1 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 45 0 45 1 1 0 1 0 8 0 inpcb 280 1323 0 1316 3 1 2 3 0 8 1 nd6 48 7 0 2 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 2 0 1 0 8 0 ppxss 1128 3 0 3 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 279 0 43 15 0 15 15 0 8 0 art_table 32 280 0 43 2 0 2 2 0 8 0 art_node 16 58 0 16 1 0 1 1 0 8 0 sysvmsgpl 40 68 0 34 1 0 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 30 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2120 0 724 46 0 46 46 0 8 0 ffsino 240 2120 0 724 83 0 83 83 0 8 0 nchpl 144 3145 0 1546 60 0 60 60 0 8 0 uvmvnodes 72 2450 0 0 45 0 45 45 0 8 0 vnodes 208 2450 0 0 129 0 129 129 0 8 0 namei 1024 9099 0 9099 1 0 1 1 0 8 1 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 528 3 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 9493 0 9493 1 0 1 1 0 8 1 plimitpl 152 56 0 49 1 0 1 1 0 8 0 sigapl 432 642 0 630 2 0 2 2 0 8 0 futexpl 56 14387 0 14387 1 0 1 1 0 8 1 knotepl 112 121 0 102 1 0 1 1 0 8 0 kqueuepl 104 80 0 78 1 0 1 1 0 8 0 pipelkpl 16 171 0 161 1 0 1 1 0 8 0 pipepl 120 342 0 324 2 1 1 2 0 8 0 fdescpl 432 643 0 630 2 0 2 2 0 8 0 filepl 120 5364 0 5279 5 1 4 5 0 8 1 lockfpl 104 140 0 139 1 0 1 1 0 8 0 lockfspl 48 43 0 42 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 29 0 19 1 0 1 1 0 8 0 ucredpl 96 539 0 532 1 0 1 1 0 8 0 zombiepl 144 631 0 629 1 0 1 1 0 8 0 processpl 896 658 0 629 4 0 4 4 0 8 0 procpl 624 1248 0 1213 4 0 4 4 0 8 1 sosppl 128 14 0 14 3 3 0 1 0 8 0 sockpl 400 1619 0 1602 6 2 4 6 0 8 2 mcl64k 65536 69 0 69 2 1 1 1 0 8 1 mcl16k 16384 15 0 15 2 1 1 1 0 8 1 mcl12k 12288 11 0 11 3 2 1 1 0 8 1 mcl9k 9216 9 0 9 2 1 1 1 0 8 1 mcl8k 8192 20 0 20 2 2 0 1 0 8 0 mcl4k 4096 65 0 65 2 1 1 1 0 8 1 mcl2k2 2112 5 0 5 3 2 1 1 0 8 1 mcl2k 2048 63204 0 63139 20 11 9 16 0 8 0 mtagpl 80 60 0 34 3 1 2 2 0 8 0 mbufpl 256 104466 0 104299 22 5 17 19 0 8 0 bufpl 280 6657 0 1249 387 0 387 387 0 8 0 anonpl 16 83105 0 67281 86 15 71 80 0 107 5 amapchunkpl 152 4279 0 4142 24 9 15 20 0 158 8 amappl16 192 3626 0 2768 66 18 48 56 0 8 4 amappl15 184 53 0 49 1 0 1 1 0 8 0 amappl14 176 124 0 122 1 0 1 1 0 8 0 amappl13 168 9 0 7 1 0 1 1 0 8 0 amappl12 160 9 0 8 2 1 1 1 0 8 0 amappl11 152 269 0 256 1 0 1 1 0 8 0 amappl10 144 12 0 10 1 0 1 1 0 8 0 amappl9 136 697 0 693 1 0 1 1 0 8 0 amappl8 128 236 0 215 1 0 1 1 0 8 0 amappl7 120 96 0 85 1 0 1 1 0 8 0 amappl6 112 257 0 253 1 0 1 1 0 8 0 amappl5 104 170 0 159 1 0 1 1 0 8 0 amappl4 96 783 0 754 1 0 1 1 0 8 0 amappl3 88 320 0 313 1 0 1 1 0 8 0 amappl2 80 4298 0 4236 3 1 2 3 0 8 0 amappl1 72 21297 0 20893 26 17 9 20 0 8 0 amappl 80 1501 0 1455 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 31 0 0 1 0 1 1 0 8 0 uaddrrnd 24 646 0 630 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 646 0 630 1 0 1 1 0 8 0 vmmpekpl 168 8448 0 8415 2 0 2 2 0 8 0 vmmpepl 168 83946 0 82100 135 32 103 117 0 357 17 vmsppl 272 645 0 630 3 1 2 2 0 8 0 pdppl 4096 1298 0 1263 6 1 5 6 0 8 0 pvpl 32 234135 0 215332 193 23 170 193 0 265 15 pmappl 200 645 0 630 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 177 0 28 5 0 5 5 0 8 0