uvm_fault(0xfffffd806ab3fe78, 0x8, 0, 1) -> e kernel: page fault trap, code=0 Stopped at fifo_write+0x4e: movq 0x8(%rax),%r12 TID PID UID PRFLAGS PFLAGS CPU COMMAND 256633 23036 32767 0x10 0 0 syz-executor.4 * 26645 23036 32767 0x10 0x4000000 1K syz-executor.4 fifo_write(ffff8000214a8aa0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd807e7e1a38,ffff8000214a8b38,8,fffffd807f7d71a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807e7e1a38,ffff800021258800,104,0,1,1266d70fcb37a0f2,ffff8000214a8c60,fffffd807e7e1a38,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 ufs_symlink(ffff8000214a8c60) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1386 VOP_SYMLINK(fffffd806b1d7968,ffff8000214a8de0,ffff8000214a8e10,ffff8000214a8d10,ffff800021258800) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 dosymlinkat(ffff80002140e7f0,20000200,ffffff9c,20000340) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 syscall(ffff8000214a8f90) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000214a8f90) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf890e948140, count: 7 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806ab3fe78, 0x8, 0, 1) -> e ddb{1}> trace fifo_write(ffff8000214a8aa0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd807e7e1a38,ffff8000214a8b38,8,fffffd807f7d71a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807e7e1a38,ffff800021258800,104,0,1,1266d70fcb37a0f2,ffff8000214a8c60,fffffd807e7e1a38,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 ufs_symlink(ffff8000214a8c60) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1386 VOP_SYMLINK(fffffd806b1d7968,ffff8000214a8de0,ffff8000214a8e10,ffff8000214a8d10,ffff800021258800) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 dosymlinkat(ffff80002140e7f0,20000200,ffffff9c,20000340) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 syscall(ffff8000214a8f90) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000214a8f90) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf890e948140, count: -8 ddb{1}> show registers rdi 0x1 rsi 0x1 rbp 0xffff8000214a8a90 rbx 0x8 rdx 0x8 rcx 0x1 rax 0 r8 0 r9 0x1 r10 0xfffffd807f7d71a0 r11 0x32e26d187ca1eb49 r12 0x1 r13 0xffff8000214a8b38 r14 0xffff8000214a8aa0 r15 0xfffffd807e7e1a38 rip 0xffffffff81ad958e fifo_write+0x4e cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000214a8a50 ss 0x10 fifo_write+0x4e: movq 0x8(%rax),%r12 ddb{1}> show proc PROC (syz-executor.4) pid=26645 stat=onproc flags process=10 proc=4000000 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002140efd0,0xffff80002140e560 process=0xffff8000213ff620 user=0xffff8000214a4000, vmspace=0xfffffd806ab3fe78 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88889 71929 25221 32767 2 0x10 syz-executor.7 63537 110186 47923 32767 2 0x10 syz-executor.2 63537 328376 47923 32767 3 0x4000090 fsleep syz-executor.2 63537 294138 47923 32767 3 0x4000090 fifor syz-executor.2 53691 129720 99563 32767 2 0x10 syz-executor.6 53691 26088 99563 32767 3 0x4000090 fifor syz-executor.6 23036 256633 95467 32767 7 0x10 syz-executor.4 23036 278752 95467 32767 2 0x4000010 syz-executor.4 *23036 26645 95467 32767 7 0x4000010 syz-executor.4 23036 80733 95467 32767 3 0x4000090 fsleep syz-executor.4 23036 221913 95467 32767 3 0x4000090 fsleep syz-executor.4 23036 194135 95467 32767 3 0x4000090 fsleep syz-executor.4 96874 78963 4859 32767 2 0x10 syz-executor.1 96874 251460 4859 32767 3 0x4000090 fsleep syz-executor.1 55533 243034 25852 32767 2 0x10 syz-executor.3 55533 145875 25852 32767 2 0x4000010 syz-executor.3 99563 489012 60391 32767 3 0x90 nanoslp syz-executor.6 60391 247236 81812 0 3 0x82 wait syz-executor.6 47923 302697 5429 32767 3 0x90 nanoslp syz-executor.2 95467 235115 41254 32767 3 0x90 nanoslp syz-executor.4 5429 162390 81812 0 3 0x82 wait syz-executor.2 41254 340668 81812 0 3 0x82 wait syz-executor.4 25221 198681 21251 32767 3 0x90 nanoslp syz-executor.7 4859 422732 16674 32767 3 0x90 nanoslp syz-executor.1 21251 119286 81812 0 3 0x82 wait syz-executor.7 25852 16837 16026 32767 3 0x90 nanoslp syz-executor.3 16674 220028 81812 0 3 0x82 wait syz-executor.1 16026 160617 81812 0 3 0x82 wait syz-executor.3 49967 460103 30365 32767 3 0x10 biowait syz-executor.5 30365 55450 81812 0 3 0x82 wait syz-executor.5 47086 338729 99031 32767 2 0x10 syz-executor.0 99031 144740 81812 0 3 0x82 wait syz-executor.0 81812 178730 77852 0 3 0x82 thrsleep syz-execprog 81812 524154 77852 0 3 0x4000082 nanoslp syz-execprog 81812 79250 77852 0 3 0x4000082 wait syz-execprog 81812 24537 77852 0 3 0x4000082 thrsleep syz-execprog 81812 322144 77852 0 3 0x4000082 wait syz-execprog 81812 413631 77852 0 3 0x4000082 wait syz-execprog 81812 453003 77852 0 3 0x4000082 wait syz-execprog 81812 61390 77852 0 3 0x4000082 thrsleep syz-execprog 81812 334779 77852 0 3 0x4000082 wait syz-execprog 81812 362930 77852 0 3 0x4000082 wait syz-execprog 81812 394523 77852 0 3 0x4000082 wait syz-execprog 81812 115627 77852 0 3 0x4000082 wait syz-execprog 81812 10552 77852 0 3 0x4000082 thrsleep syz-execprog 81812 2987 77852 0 3 0x4000082 thrsleep syz-execprog 81812 312288 77852 0 3 0x4000082 kqread syz-execprog 77852 45369 44046 0 3 0x10008a sigsusp ksh 44046 307328 84549 0 3 0x9a kqread sshd 14338 329790 1 0 3 0x100083 ttyin getty 84549 134660 1 0 3 0x88 kqread sshd 85370 218841 64818 73 3 0x1100090 kqread syslogd 64818 425110 1 0 3 0x100082 netio syslogd 22093 163714 1 0 3 0x100080 kqread resolvd 15374 301116 78204 77 3 0x100092 kqread dhcpleased 24261 510476 78204 77 3 0x100092 kqread dhcpleased 78204 473779 1 0 3 0x80 kqread dhcpleased 71208 463058 0 0 3 0x14200 bored smr 93882 508770 0 0 2 0x14200 zerothread 75723 464431 0 0 3 0x14200 aiodoned aiodoned 10975 443940 0 0 3 0x14200 syncer update 48752 310263 0 0 3 0x14200 cleaner cleaner 42670 265448 0 0 3 0x14200 reaper reaper 53816 125511 0 0 3 0x14200 pgdaemon pagedaemon 87757 280640 0 0 3 0x14200 bored viomb 96465 135568 0 0 3 0x40014200 acpi0 acpi0 59429 63212 0 0 3 0x40014200 idle1 87896 450933 0 0 3 0x14200 bored softnet 74958 88989 0 0 3 0x14200 bored softnet 96373 40517 0 0 3 0x14200 bored softnet 95725 511812 0 0 3 0x14200 bored softnet 75613 154396 0 0 3 0x14200 bored systqmp 24350 104716 0 0 3 0x14200 bored systq 21887 270487 0 0 3 0x40014200 bored softclock 49160 238465 0 0 3 0x40014200 idle0 1 102358 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 23036 (syz-executor.4) thread 0xffff80002140e7f0 (26645) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829f2a00) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:415 #3 sleep_finish+0x180 sys/kern/kern_synch.c:417 #4 tsleep+0x12c sys/kern/kern_synch.c:155 #5 biowait+0x91 sys/kern/vfs_bio.c:1268 #6 bwrite+0x21b sys/kern/vfs_bio.c:769 #7 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 #8 ufs_direnter+0x8fa sys/ufs/ufs/ufs_lookup.c:909 #9 ufs_makeinode+0x4cc sys/ufs/ufs/ufs_vnops.c:1856 #10 ufs_symlink+0x47 sys/ufs/ufs/ufs_vnops.c:1370 #11 VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 #12 dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 #13 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #13 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069f1ab48) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324 #8 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #9 ufs_makeinode+0xae sys/ufs/ufs/ufs_vnops.c:1818 #10 ufs_symlink+0x47 sys/ufs/ufs/ufs_vnops.c:1370 #11 VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 #12 dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 #13 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #13 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 Process 49967 (syz-executor.5) thread 0xffff8000ffff47e0 (460103) exclusive rrwlock inode r = 0 (0xfffffd8069f1a0a8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 #11 namei+0x36a sys/kern/vfs_lookup.c:244 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #13 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #13 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a20e808) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 47086 (syz-executor.0) thread 0xffff8000ffff42a0 (338729) exclusive rrwlock inode r = 0 (0xfffffd8069f1aa38) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #10 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a20e1a8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10179 6407K 6420K 78643K 11269 0 pcb 13 8K 8K 78643K 13 0 rtable 234 6K 6K 78643K 351 0 ifaddr 82 16K 16K 78643K 84 0 counters 56 35K 35K 78643K 56 0 ioctlops 0 0K 2K 78643K 33 0 iov 0 0K 0K 78643K 3128 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1168 73K 73K 78643K 4265 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 6258 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 125K 78643K 3272 0 proc 56 78K 115K 78643K 451 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 6K 6K 78643K 99 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 2K 78643K 628 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 206 75K 76K 78643K 24098 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 11 0K 2K 78643K 27 0 temp 51 4718K 4782K 78643K 12760 0 kqueue 13 20K 44K 78643K 4024 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 37 0 34 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 6205 0 6188 2 0 2 2 0 8 1 syncache 296 5 0 5 2 2 0 1 0 8 0 tcpcb 768 8 0 5 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 3185 0 3178 2 0 2 2 0 8 1 nd6 48 24 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 semapl 112 6256 0 6246 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10890 0 9457 90 0 90 90 0 8 0 ffsino 272 10890 0 9457 96 0 96 96 0 8 0 nchpl 144 17414 0 15743 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 52756 0 52754 3 2 1 2 0 8 0 percpumem 16 40 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 33863 0 33862 16 15 1 8 0 8 0 plimitpl 152 32 0 9 1 0 1 1 0 8 0 sigapl 424 3565 0 3513 7 0 7 7 0 8 0 futexpl 64 103890 0 103885 1 0 1 1 0 8 0 knotepl 120 104 0 0 4 0 4 4 0 8 0 kqueuepl 216 4047 0 4037 4 2 2 2 0 8 1 pipepl 320 131 0 103 4 1 3 3 0 8 0 fdescpl 496 3548 0 3513 7 2 5 6 0 8 0 filepl 152 14011 0 13880 6 0 6 6 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 25 0 9 1 0 1 1 0 8 0 ucredpl 104 88 0 70 1 0 1 1 0 8 0 zombiepl 144 3513 0 3513 2 1 1 1 0 8 1 processpl 1064 3565 0 3513 5 1 4 5 0 8 0 procpl 672 11428 0 11352 8 0 8 8 0 8 1 sockpl 488 9427 0 9400 6 0 6 6 0 8 2 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 78 0 0 9 0 9 9 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 289 0 0 18 0 18 18 0 8 0 bufpl 288 6683 0 346 453 0 453 453 0 8 0 anonpl 24 711179 0 704933 51 8 43 45 0 186 0 amapchunkpl 152 67065 0 66581 25 3 22 23 0 158 1 amappl16 200 6605 0 6468 8 0 8 8 0 8 0 amappl15 192 13 0 10 2 1 1 1 0 8 0 amappl14 184 401 0 395 1 0 1 1 0 8 0 amappl13 176 80 0 79 2 1 1 1 0 8 0 amappl12 168 822 0 817 2 1 1 1 0 8 0 amappl11 160 483 0 467 1 0 1 1 0 8 0 amappl10 152 427 0 422 1 0 1 1 0 8 0 amappl9 144 1264 0 1261 2 1 1 1 0 8 0 amappl8 136 914 0 879 3 1 2 2 0 8 0 amappl7 128 511 0 492 1 0 1 1 0 8 0 amappl6 120 971 0 953 2 1 1 2 0 8 0 amappl5 112 2411 0 2392 1 0 1 1 0 8 0 amappl4 104 1654 0 1623 2 0 2 2 0 8 0 amappl3 96 12278 0 12210 3 0 3 3 0 8 1 amappl2 88 1237 0 1184 3 1 2 2 0 8 0 amappl1 80 96676 0 95862 22 3 19 21 0 8 0 amappl 88 23669 0 23524 5 1 4 4 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 3548 0 3513 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3548 0 3513 1 0 1 1 0 8 0 vmmpekpl 168 34652 0 34620 2 0 2 2 0 8 0 vmmpepl 168 321353 0 318984 117 3 114 115 0 357 5 vmsppl 368 3547 0 3513 4 0 4 4 0 8 0 rwobjpl 56 98821 0 91746 104 2 102 102 0 8 1 pdppl 4096 7103 0 7026 121 40 81 95 0 8 4 pvpl 32 1365670 0 1354332 264 94 170 263 0 265 69 pmappl 248 3547 0 3513 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 834 0 44 23 0 23 23 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff8297aff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff829f27f8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829f27f8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021405720,ffff80000004bd00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f end of kernel end trace frame: 0x7f7ffffecd30, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8297aff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff829f27f8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829f27f8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021405720,ffff80000004bd00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f end of kernel end trace frame: 0x7f7ffffecd30, count: -6 ddb{0}> machine ddbcpu 1 Stopped at fifo_write+0x4e: movq 0x8(%rax),%r12 fifo_write(ffff8000214a8aa0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd807e7e1a38,ffff8000214a8b38,8,fffffd807f7d71a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807e7e1a38,ffff800021258800,104,0,1,1266d70fcb37a0f2,ffff8000214a8c60,fffffd807e7e1a38,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 ufs_symlink(ffff8000214a8c60) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1386 VOP_SYMLINK(fffffd806b1d7968,ffff8000214a8de0,ffff8000214a8e10,ffff8000214a8d10,ffff800021258800) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 dosymlinkat(ffff80002140e7f0,20000200,ffffff9c,20000340) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 syscall(ffff8000214a8f90) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000214a8f90) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf890e948140, count: 7 ddb{1}> trace fifo_write(ffff8000214a8aa0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd807e7e1a38,ffff8000214a8b38,8,fffffd807f7d71a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807e7e1a38,ffff800021258800,104,0,1,1266d70fcb37a0f2,ffff8000214a8c60,fffffd807e7e1a38,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 ufs_symlink(ffff8000214a8c60) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1386 VOP_SYMLINK(fffffd806b1d7968,ffff8000214a8de0,ffff8000214a8e10,ffff8000214a8d10,ffff800021258800) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 dosymlinkat(ffff80002140e7f0,20000200,ffffff9c,20000340) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 syscall(ffff8000214a8f90) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000214a8f90) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf890e948140, count: -8