uvm_fault(0xfffffd803f013dd0, 0x8, 0, 1) -> e kernel: page fault trap, code=0 Stopped at fifo_write+0x4e: movq 0x8(%rax),%r12 ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xfffffd803f013dd0, 0x8, 0, 1) -> e fifo_write(ffff800017583440) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:246 end trace frame: 0xffff8000175834b0, count: 0 ddb> trace fifo_write(ffff800017583440) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:246 VOP_WRITE(fffffd802ec36d08,ffff8000175834d8,8,fffffd803f7c6b40) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269 vn_rdwr(1,fffffd802ec36d08,ffff80001485bc00,4d,0,1) at vn_rdwr+0xef sys/kern/vfs_vnops.c:333 ufs_symlink(ffff800017583600) at ufs_symlink+0x121 sys/ufs/ufs/ufs_vnops.c:1400 VOP_SYMLINK(fffffd80380cd280,ffff800017583778,ffff8000175837c8,ffff8000175836a8,ffff80001485bc00) at VOP_SYMLINK+0xdd sys/kern/vfs_vops.c:498 dosymlinkat(ffff8000ffff2780,20000040,3,200000c0) at dosymlinkat+0x161 sys/kern/vfs_syscalls.c:1739 syscall(ffff800017583950) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffffe,0,3,f199fe77010) at Xsyscall+0x128 end of kernel end trace frame: 0xf1beb2bf370, count: -8 ddb> show registers rdi 0xffffffff81818cf7 fifo_write+0x47 rsi 0x600 rbp 0xffff800017583430 rbx 0x8 rdx 0x601 rcx 0xffff80001653f000 rax 0 r8 0 r9 0x1 r10 0xc5b2cbe4f1752881 r11 0x703c5d766fc6c17b r12 0x1 r13 0xffff8000175834d8 r14 0xffff800017583440 r15 0xfffffd802ec36d08 rip 0xffffffff81818cfe fifo_write+0x4e cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000175833f0 ss 0x10 fifo_write+0x4e: movq 0x8(%rax),%r12 ddb> show proc PROC (syz-executor.1) pid=121469 stat=onproc flags process=0 proc=4000000 pri=17, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2ee8,0xffffffff8256b828 process=0xffff8000ffff6a30 user=0xffff80001757e000, vmspace=0xfffffd803f013dd0 estcpu=28, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 21889 70829 1 0 2 0 syz-executor.1 *21889 121469 1 0 7 0x4000000 syz-executor.1 42944 473486 0 0 3 0x14200 bored sosplice 94367 372427 0 0 3 0x14200 acct acct 92336 7311 72691 0 2 0x2 syz-executor.0 72691 324988 37492 0 3 0x82 thrsleep syz-fuzzer 72691 36156 37492 0 2 0x4000482 syz-fuzzer 72691 62969 37492 0 3 0x4000082 kqread syz-fuzzer 72691 283317 37492 0 3 0x4000082 thrsleep syz-fuzzer 72691 301717 37492 0 3 0x4000082 thrsleep syz-fuzzer 72691 355319 37492 0 3 0x4000082 thrsleep syz-fuzzer 72691 476857 37492 0 3 0x4000082 thrsleep syz-fuzzer 37492 298209 70528 0 3 0x10008a pause ksh 70528 383206 82680 0 3 0x92 select sshd 60423 276240 1 0 3 0x100083 ttyin getty 82680 340884 1 0 3 0x80 select sshd 60316 145402 97130 73 2 0x100090 syslogd 97130 308049 1 0 3 0x100082 netio syslogd 49220 59849 1 77 3 0x100090 poll dhclient 62329 495280 1 0 3 0x80 poll dhclient 23766 321443 0 0 2 0x14200 zerothread 67485 520197 0 0 3 0x14200 aiodoned aiodoned 87734 301099 0 0 3 0x14200 syncer update 21134 491373 0 0 3 0x14200 cleaner cleaner 60958 471832 0 0 3 0x14200 reaper reaper 34677 198349 0 0 3 0x14200 pgdaemon pagedaemon 73976 118710 0 0 3 0x14200 bored crynlk 11301 354274 0 0 3 0x14200 bored crypto 40910 198946 0 0 3 0x40014200 acpi0 acpi0 96031 28779 0 0 3 0x14200 bored softnet 26214 46296 0 0 3 0x14200 bored systqmp 82834 433875 0 0 3 0x14200 bored systq 36887 248991 0 0 3 0x40014200 bored softclock 77571 272489 0 0 3 0x40014200 idle0 71151 161033 0 0 3 0x14200 bored smr 1 380583 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 Kern Lim devbuf 9505 6336K 8596K 78643K 11712 0 0 pcb 13 8K 8K 78643K 87 0 0 rtable 91 3K 4K 78643K 388 0 0 ifaddr 58 12K 13K 78643K 108 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 26 0 0 iov 0 0K 24K 78643K 73 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1249 78K 79K 78643K 1537 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 3 0 0 VM map 6 1K 1K 78643K 6 0 0 sem 12 0K 0K 78643K 153 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 4 9K 25K 78643K 220 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 48 38K 63K 78643K 401 0 0 subproc 32 2K 2K 78643K 51 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 8 0 0 in_multi 22 1K 2K 78643K 59 0 0 ether_multi 1 0K 0K 78643K 2 0 0 mrt 0 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 223 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 98 37K 37K 78643K 1419 0 0 UVM aobj 6 2K 2K 78643K 6 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 68 0 0 NDP 13 0K 0K 78643K 32 0 0 temp 155 3530K 3594K 78643K 6873 0 0 kqueue 0 0K 0K 78643K 6 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 12 0 8 1 0 1 1 0 8 0 rtpcb 80 35 0 33 1 0 1 1 0 8 0 rtentry 112 72 0 38 2 0 2 2 0 8 0 unpcb 120 297 0 289 2 1 1 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 160 0 160 1 1 0 1 0 8 0 tcpcb 544 186 0 182 2 1 1 2 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 6 0 6 1 1 0 1 0 8 0 inpcb 280 375 0 368 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 7 0 5 1 0 1 1 0 8 0 ppxss 1128 7 0 7 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 335 0 162 15 2 13 15 0 8 0 art_table 32 336 0 162 2 0 2 2 0 8 0 art_node 16 71 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 151 0 141 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1735 0 340 46 0 46 46 0 8 0 ffsino 240 1735 0 340 83 0 83 83 0 8 0 nchpl 144 2272 0 1832 60 40 20 60 0 8 0 uvmvnodes 72 2040 0 0 38 0 38 38 0 8 0 vnodes 208 2040 0 0 108 0 108 108 0 8 0 namei 1024 6244 0 6242 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 520 4 0 0 1 0 1 1 0 8 0 scxspl 192 6238 0 6238 8 7 1 7 0 8 1 plimitpl 152 33 0 26 1 0 1 1 0 8 0 sigapl 432 387 0 375 2 0 2 2 0 8 0 futexpl 56 6427 0 6427 1 0 1 1 0 8 1 knotepl 112 101 0 82 1 0 1 1 0 8 0 kqueuepl 104 55 0 53 1 0 1 1 0 8 0 pipepl 112 252 0 235 1 0 1 1 0 8 0 fdescpl 424 388 0 375 2 0 2 2 0 8 0 filepl 120 2864 0 2770 5 1 4 5 0 8 1 lockfpl 104 60 0 59 1 0 1 1 0 8 0 lockfspl 48 21 0 20 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 48 0 38 1 0 1 1 0 8 0 ucredpl 96 239 0 232 1 0 1 1 0 8 0 zombiepl 144 375 0 374 1 0 1 1 0 8 0 processpl 864 404 0 374 4 0 4 4 0 8 0 procpl 632 665 0 628 4 0 4 4 0 8 0 sosppl 128 4 0 4 1 1 0 1 0 8 0 sockpl 384 710 0 693 5 1 4 5 0 8 2 mcl64k 65536 57 0 57 1 0 1 1 0 8 1 mcl16k 16384 5 0 5 2 1 1 1 0 8 1 mcl12k 12288 11 0 11 1 0 1 1 0 8 1 mcl9k 9216 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 11 0 11 1 0 1 1 0 8 1 mcl4k 4096 38 0 38 2 1 1 1 0 8 1 mcl2k 2048 69865 0 69818 18 10 8 15 0 8 1 mtagpl 80 148 0 94 3 1 2 2 0 8 0 mbufpl 256 113152 0 112968 21 8 13 18 0 8 0 bufpl 256 6698 0 1783 308 0 308 308 0 8 0 anonpl 16 83433 0 63593 96 1 95 95 0 62 15 amapchunkpl 152 2017 0 1895 10 1 9 9 0 158 3 amappl16 192 3455 0 2314 80 14 66 70 0 8 8 amappl14 176 78 0 72 1 0 1 1 0 8 0 amappl13 168 10 0 9 1 0 1 1 0 8 0 amappl12 160 12 0 8 1 0 1 1 0 8 0 amappl11 152 54 0 41 1 0 1 1 0 8 0 amappl10 144 7 0 7 1 1 0 1 0 8 0 amappl9 136 667 0 663 1 0 1 1 0 8 0 amappl8 128 261 0 231 2 0 2 2 0 8 0 amappl7 120 38 0 33 1 0 1 1 0 8 0 amappl6 112 58 0 51 1 0 1 1 0 8 0 amappl5 104 150 0 139 1 0 1 1 0 8 0 amappl4 96 579 0 552 1 0 1 1 0 8 0 amappl3 88 162 0 157 1 0 1 1 0 8 0 amappl2 80 2253 0 2188 3 1 2 3 0 8 0 amappl1 72 16698 0 16302 25 16 9 20 0 8 0 amappl 80 926 0 889 1 0 1 1 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 392 0 375 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 392 0 375 1 0 1 1 0 8 0 vmmpekpl 168 6982 0 6955 2 0 2 2 0 8 0 vmmpepl 168 56115 0 53963 142 12 130 138 0 357 33 vmsppl 272 387 0 375 2 1 1 2 0 8 0 pdppl 4096 790 0 754 7 1 6 6 0 8 0 pvpl 32 205114 0 182808 221 2 219 219 0 265 38 pmappl 200 391 0 375 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 469 0 27 13 0 13 13 0 8 0