uvm_fault(0xfffffd806c840540, 0x8, 0, 1) -> e kernel: page fault trap, code=0 Stopped at fifo_write+0x6e: movq 0x8(%rax),%r15 TID PID UID PRFLAGS PFLAGS CPU COMMAND 331696 39571 32767 0x10 0 0 syz-executor * 89707 39167 32767 0x10 0x4000000 1K syz-executor fifo_write(ffff80002a129b10) at fifo_write+0x6e sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8071e50d00,ffff80002a129ba8,8,fffffd807f7d3000) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8071e50d00,ffff800029fe7800,fe,0,1,1da76f4461db2b28,ffff80002a129cd0,fffffd8071e50d00,78) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 ufs_symlink(ffff80002a129cd0) at ufs_symlink+0x1ee sys/ufs/ufs/ufs_vnops.c:1309 VOP_SYMLINK(fffffd80723987f8,ffff80002a129e50,ffff80002a129e80,ffff80002a129d80,ffff800029fe7800) at VOP_SYMLINK+0x11a sys/kern/vfs_vops.c:432 dosymlinkat(ffff8000ffffca30,20001240,4,20001100) at dosymlinkat+0x1dd sys/kern/vfs_syscalls.c:1806 syscall(ffff80002a12a000) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a12a000) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xea26ca10560, 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(0xfffffd806c840540, 0x8, 0, 1) -> e ddb{1}> trace fifo_write(ffff80002a129b10) at fifo_write+0x6e sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8071e50d00,ffff80002a129ba8,8,fffffd807f7d3000) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8071e50d00,ffff800029fe7800,fe,0,1,1da76f4461db2b28,ffff80002a129cd0,fffffd8071e50d00,78) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 ufs_symlink(ffff80002a129cd0) at ufs_symlink+0x1ee sys/ufs/ufs/ufs_vnops.c:1309 VOP_SYMLINK(fffffd80723987f8,ffff80002a129e50,ffff80002a129e80,ffff80002a129d80,ffff800029fe7800) at VOP_SYMLINK+0x11a sys/kern/vfs_vops.c:432 dosymlinkat(ffff8000ffffca30,20001240,4,20001100) at dosymlinkat+0x1dd sys/kern/vfs_syscalls.c:1806 syscall(ffff80002a12a000) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a12a000) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xea26ca10560, count: -8 ddb{1}> show registers rdi 0xfffffd8071e50d00 rsi 0x29d9 __ALIGN_SIZE+0x19d9 rbp 0xffff80002a129b00 rbx 0xfffffd8071e50d00 rdx 0xffff80002f581000 rcx 0x29d8 __ALIGN_SIZE+0x19d8 rax 0 r8 0 r9 0x1 r10 0xffff800029b7bff0 r11 0xae9634120b590315 r12 0x4000 __ALIGN_SIZE+0x3000 r13 0xffff80002a129ba8 r14 0xffff80002a129b10 r15 0x1 rip 0xffffffff820e4a6e fifo_write+0x6e cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a129ad0 ss 0 fifo_write+0x6e: movq 0x8(%rax),%r15 ddb{1}> show proc PROC (syz-executor) tid=89707 pid=39167 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=17, usrpri=84, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffc298,0xffff8000fffee2c0 process=0xffff8000ffff4928 user=0xffff80002a125000, vmspace=0xfffffd806c840540 estcpu=34, cpticks=6, pctcpu=0.27, user=1, sys=32, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39571 331696 88587 32767 7 0x10 syz-executor 98544 169684 57268 32767 2 0x10 syz-executor 98544 425335 57268 32767 3 0x4000090 kqsel syz-executor 98544 165382 57268 32767 3 0x4000090 fsleep syz-executor 93905 26935 19110 32767 2 0x10 syz-executor 93905 450492 19110 32767 3 0x4000090 kqsel syz-executor 93905 487551 19110 32767 2 0x4000010 syz-executor 85335 378668 10967 32767 2 0x10 syz-executor 85335 208913 10967 32767 3 0x4000090 fsleep syz-executor 85335 86295 10967 32767 3 0x4000090 fsleep syz-executor 39167 314839 86341 32767 2 0x10 syz-executor *39167 89707 86341 32767 7 0x4000010 syz-executor 58575 231580 0 0 3 0x14200 bored sosplice 10967 124281 79978 32767 3 0x90 nanoslp syz-executor 86341 194113 82969 32767 3 0x90 nanoslp syz-executor 79978 78055 91932 0 3 0x82 wait syz-executor 82969 239004 91932 0 3 0x82 wait syz-executor 8151 170751 83360 32767 2 0x10 syz-executor 76760 409177 95385 32767 3 0x90 wait syz-executor 57268 360275 96593 32767 3 0x90 nanoslp syz-executor 2089 451778 44594 32767 3 0x90 wait syz-executor 88587 320495 81356 32767 3 0x90 nanoslp syz-executor 19110 424388 99962 32767 3 0x90 nanoslp syz-executor 95385 168742 91932 0 3 0x82 wait syz-executor 83360 346897 91932 0 3 0x82 wait syz-executor 81356 426184 91932 0 3 0x82 wait syz-executor 96593 191359 91932 0 3 0x82 wait syz-executor 44594 71353 91932 0 3 0x82 wait syz-executor 99962 521696 91932 0 3 0x82 wait syz-executor 91932 492436 76227 0 3 0x82 kqread syz-executor 76227 109612 40852 0 3 0x10008a sigsusp ksh 40852 470179 30615 0 3 0x98 kqread sshd-session 30615 406692 87315 0 3 0x92 kqread sshd-session 44056 144461 1 0 3 0x100083 ttyin getty 87315 28437 1 0 3 0x88 kqread sshd 36480 18835 43617 73 2 0x1100010 syslogd 43617 486542 1 0 3 0x100082 sbwait syslogd 31299 97031 1 0 3 0x100080 kqread resolvd 97854 383926 27934 77 3 0x100092 kqread dhcpleased 77903 44842 27934 77 3 0x100092 kqread dhcpleased 27934 458477 1 0 3 0x80 kqread dhcpleased 47923 512126 0 0 3 0x14200 bored smr 74173 173096 0 0 3 0x14200 pgzero zerothread 27828 62090 0 0 3 0x14200 aiodoned aiodoned 34480 164211 0 0 3 0x14200 syncer update 67733 38583 0 0 3 0x14200 cleaner cleaner 30993 141539 0 0 3 0x14200 reaper reaper 545 143661 0 0 3 0x14200 pgdaemon pagedaemon 667 53359 0 0 3 0x14200 bored viomb 53842 283644 0 0 3 0x40014200 acpi0 acpi0 31865 403881 0 0 3 0x40014200 idle1 90579 77193 0 0 3 0x14200 bored softnet3 73471 189089 0 0 3 0x14200 bored softnet2 47020 38055 0 0 3 0x14200 bored softnet1 64940 347150 0 0 3 0x14200 bored softnet0 66530 114736 0 0 3 0x14200 bored systqmp 72450 140903 0 0 3 0x14200 bored systq 67424 272869 0 0 3 0x14200 tmoslp softclockmp 48670 385734 0 0 3 0x40014200 tmoslp softclock 78161 184059 0 0 3 0x40014200 idle0 1 122569 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 39167 (syz-executor) thread 0xffff8000ffffca30 (89707) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83526f38) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x219 sys/kern/kern_synch.c:416 #4 biowait+0xc1 sys/kern/vfs_bio.c:1254 #5 bwrite+0x2e2 sys/kern/vfs_bio.c:766 #6 ffs_update+0x34c sys/ufs/ffs/ffs_inode.c:111 #7 ufs_direnter+0x721 sys/ufs/ufs/ufs_lookup.c:726 #8 ufs_makeinode+0x51e sys/ufs/ufs/ufs_vnops.c:1764 #9 ufs_symlink+0x54 sys/ufs/ufs/ufs_vnops.c:1293 #10 VOP_SYMLINK+0x11a sys/kern/vfs_vops.c:432 #11 dosymlinkat+0x1dd sys/kern/vfs_syscalls.c:1806 #12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c924d68) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x171 sys/ufs/ufs/ufs_ihash.c:95 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #9 ufs_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1728 #10 ufs_symlink+0x54 sys/ufs/ufs/ufs_vnops.c:1293 #11 VOP_SYMLINK+0x11a sys/kern/vfs_vops.c:432 #12 dosymlinkat+0x1dd sys/kern/vfs_syscalls.c:1806 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 Process 8151 (syz-executor) thread 0xffff8000fffef978 (170751) exclusive rrwlock inode r = 0 (0xfffffd806c924e78) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x171 sys/ufs/ufs/ufs_ihash.c:95 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bfa4e70) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 36480 (syslogd) thread 0xffff8000ffffd450 (18835) exclusive rrwlock inode r = 0 (0xfffffd806e3635f0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2927 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 10025K 10036K 166960K 11291 0 pcb 17 12K 12K 166960K 17 0 rtable 238 6K 7K 166960K 609 0 pf 31 16K 16K 166960K 47 0 ifaddr 42 7K 7K 166960K 78 0 ifgroup 50 2K 2K 166960K 82 0 counters 64 36K 36K 166960K 80 0 ioctlops 0 0K 2K 166960K 42 0 iov 0 0K 4K 166960K 76 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1438 90K 90K 166960K 1529 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 25 93K 141K 166960K 488 0 sigio 0 0K 0K 166960K 40 0 proc 56 78K 164K 166960K 709 0 subproc 104 6K 11K 166960K 208 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 87 0 in_multi 99 7K 7K 166960K 198 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 470 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 262 92K 124K 166960K 5450 0 UVM aobj 13 2K 4K 166960K 15 0 pinsyscall 46 92K 118K 166960K 1719 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 3 0K 0K 166960K 19 0 NDP 11 0K 2K 166960K 51 0 temp 48 6816K 6882K 166960K 6087 0 kqueue 13 20K 29K 166960K 76 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 79 0 74 1 0 1 1 0 8 0 rtentry 112 202 0 90 4 0 4 4 0 8 0 unpcb 144 325 0 306 2 0 2 2 0 8 1 syncache 336 6 0 6 3 2 1 1 0 8 1 tcpqe 32 4 0 4 1 0 1 1 0 8 1 tcpcb 808 196 0 184 8 0 8 8 0 8 6 arp 120 35 0 17 1 0 1 1 0 8 0 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 88 0 88 1 0 1 1 0 8 1 inpcb 336 514 0 496 13 0 13 13 0 8 11 nd6 136 50 0 24 1 0 1 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 813 0 353 35 6 29 29 0 8 0 art_table 32 814 0 353 4 0 4 4 0 8 0 art_node 16 201 0 99 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 12 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1898 0 377 96 0 96 96 0 8 0 ffsino 272 1898 0 377 102 0 102 102 0 8 0 nchpl 144 2391 0 707 63 0 63 63 0 8 0 uvmvnodes 80 2115 0 0 44 0 44 44 0 8 0 vnodes 216 2115 0 0 118 0 118 118 0 8 0 namei 1024 8227 0 8226 3 2 1 2 0 8 0 percpumem 16 54 0 8 1 0 1 1 0 8 0 kstatmem 264 38 0 16 2 0 2 2 0 8 0 scxspl 216 9230 0 9230 11 3 8 8 1 8 8 plimitpl 152 195 0 169 2 0 2 2 0 8 0 sigapl 424 755 0 699 8 0 8 8 0 8 0 futexpl 64 3388 0 3385 3 2 1 1 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 216 157 0 146 5 0 5 5 0 8 4 pipepl 320 183 0 156 5 0 5 5 0 8 2 fdescpl 496 736 0 699 8 1 7 7 0 8 1 filepl 152 3575 0 3310 16 0 16 16 0 8 4 lockfpl 104 65 0 60 1 0 1 1 0 8 0 lockfspl 48 27 0 23 1 0 1 1 0 8 0 sessionpl 144 29 0 13 1 0 1 1 0 8 0 pgrppl 48 82 0 58 1 0 1 1 0 8 0 ucredpl 104 528 0 509 1 0 1 1 0 8 0 zombiepl 144 701 0 699 1 0 1 1 0 8 0 processpl 1160 755 0 699 5 0 5 5 0 8 0 procpl 648 1136 0 1073 6 0 6 6 0 8 0 sosppl 168 6 0 6 1 0 1 1 0 8 1 sockpl 664 921 0 879 16 1 15 15 0 8 11 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 240 0 0 30 1 29 30 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 417 0 0 24 0 24 24 0 8 0 bufpl 280 5852 0 92 412 0 412 412 0 8 0 anonpl 24 172587 0 164279 55 4 51 52 0 185 0 amapchunkpl 152 18359 0 17494 43 5 38 38 0 158 4 amappl16 200 3907 0 3889 22 8 14 14 0 8 12 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 118 0 108 1 0 1 1 0 8 0 amappl13 176 12 0 10 1 0 1 1 0 8 0 amappl12 168 1472 0 1435 3 1 2 2 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 38 0 38 1 1 0 1 0 8 0 amappl9 144 159 0 158 2 1 1 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 127 0 117 1 0 1 1 0 8 0 amappl6 120 242 0 241 1 0 1 1 0 8 0 amappl5 112 159 0 151 1 0 1 1 0 8 0 amappl4 104 312 0 296 1 0 1 1 0 8 0 amappl3 96 3391 0 3249 5 1 4 4 0 8 0 amappl2 88 708 0 653 2 0 2 2 0 8 0 amappl1 80 9100 0 8559 14 1 13 14 0 8 0 amappl 88 5030 0 4824 6 0 6 6 0 92 1 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 14 0 2 1 0 1 1 0 8 0 uaddrrnd 24 736 0 699 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 736 0 699 1 0 1 1 0 8 0 vmmpekpl 168 7656 0 7593 4 0 4 4 0 8 0 vmmpepl 168 52351 0 50333 103 2 101 101 0 357 10 vmsppl 440 735 0 699 7 1 6 6 0 8 0 rwobjpl 56 20344 0 17360 45 0 45 45 0 8 2 pdppl 4096 1479 0 1398 131 48 83 105 0 8 2 pvpl 32 28821 0 0 233 0 233 233 0 265 0 pmappl 248 735 0 699 5 1 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 456 0 61 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8348eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83526d30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83526d30) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158 __mp_lock(ffffffff83526d30) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83526d30) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 syscall(ffff80002a07c190) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a07c190) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b4bd0f230a0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff8348eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83526d30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83526d30) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158 __mp_lock(ffffffff83526d30) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83526d30) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 syscall(ffff80002a07c190) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a07c190) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b4bd0f230a0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at fifo_write+0x6e: movq 0x8(%rax),%r15 fifo_write(ffff80002a129b10) at fifo_write+0x6e sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8071e50d00,ffff80002a129ba8,8,fffffd807f7d3000) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8071e50d00,ffff800029fe7800,fe,0,1,1da76f4461db2b28,ffff80002a129cd0,fffffd8071e50d00,78) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 ufs_symlink(ffff80002a129cd0) at ufs_symlink+0x1ee sys/ufs/ufs/ufs_vnops.c:1309 VOP_SYMLINK(fffffd80723987f8,ffff80002a129e50,ffff80002a129e80,ffff80002a129d80,ffff800029fe7800) at VOP_SYMLINK+0x11a sys/kern/vfs_vops.c:432 dosymlinkat(ffff8000ffffca30,20001240,4,20001100) at dosymlinkat+0x1dd sys/kern/vfs_syscalls.c:1806 syscall(ffff80002a12a000) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a12a000) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xea26ca10560, count: 7 ddb{1}> trace fifo_write(ffff80002a129b10) at fifo_write+0x6e sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8071e50d00,ffff80002a129ba8,8,fffffd807f7d3000) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8071e50d00,ffff800029fe7800,fe,0,1,1da76f4461db2b28,ffff80002a129cd0,fffffd8071e50d00,78) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 ufs_symlink(ffff80002a129cd0) at ufs_symlink+0x1ee sys/ufs/ufs/ufs_vnops.c:1309 VOP_SYMLINK(fffffd80723987f8,ffff80002a129e50,ffff80002a129e80,ffff80002a129d80,ffff800029fe7800) at VOP_SYMLINK+0x11a sys/kern/vfs_vops.c:432 dosymlinkat(ffff8000ffffca30,20001240,4,20001100) at dosymlinkat+0x1dd sys/kern/vfs_syscalls.c:1806 syscall(ffff80002a12a000) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a12a000) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xea26ca10560, count: -8