panic: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 51656 86225 0 0x2 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b761f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f2604,ffffffff8340ebf5,1cb,ffffffff833ac17c) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff8000fffddbf0) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff8000015a4000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff8000015a4000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,81,2000,ffff8000fffe4fb8) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c3f8700) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8068f1d2c0,81,fffffd80097fd3a8,ffff8000fffe4fb8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8068e5b118,ffff8000fffe4fb8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8068e5b118,ffff8000fffe4fb8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8068e5b118,ffff8000fffe4fb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8068e5b118,ffff8000fffe4fb8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe4fb8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe4fb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe4fb8,ffff80003c3f8a70,ffff80003c3f89c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003c3f8a60, count: 0 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b761f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f2604,ffffffff8340ebf5,1cb,ffffffff833ac17c) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff8000fffddbf0) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff8000015a4000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff8000015a4000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,81,2000,ffff8000fffe4fb8) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c3f8700) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8068f1d2c0,81,fffffd80097fd3a8,ffff8000fffe4fb8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8068e5b118,ffff8000fffe4fb8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8068e5b118,ffff8000fffe4fb8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8068e5b118,ffff8000fffe4fb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8068e5b118,ffff8000fffe4fb8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe4fb8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe4fb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe4fb8,ffff80003c3f8a70,ffff80003c3f89c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3f8a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3f8a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74783d8ce500, count: -16 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c3f84d0 rbx 0xffffffff83879e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff8000fffe4fb8 rax 0xffffffff83878ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x563ff53165f00ec2 r11 0xbf370fba06bb140f r12 0xffffffff83879c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff817c1d35 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c3f84c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=346577 pid=81293 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffe4fb8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffe4d20,0xffff8000fffee028 process=0xffff8000fffe0e90 user=0xffff80003c3f3000, vmspace=0xfffffd8072de7b88 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35660 56258 45656 0 2 0 syz-executor 58823 180856 40184 0 2 0 syz-executor 58823 171633 40184 0 2 0x4000000 syz-executor 18556 420985 62925 0 2 0 syz-executor 18556 223803 62925 0 3 0x4000080 kqsel syz-executor 18556 176372 62925 0 3 0x4000080 kqsel syz-executor 6162 490650 40493 0 2 0 syz-executor 6162 460878 40493 0 3 0x4000000 smrbar syz-executor 74380 502415 95219 0 3 0x80 nanoslp syz-executor 74380 389414 95219 0 3 0x4000080 ttyin syz-executor 18853 271744 42339 0 3 0x80 nanoslp syz-executor 18853 496701 42339 0 3 0x4000080 msgwait syz-executor 18853 100874 42339 0 3 0x4000080 fsleep syz-executor 45656 450157 86225 0 2 0x2 syz-executor 46936 316578 86225 0 2 0x2 syz-executor 95219 145638 86225 0 3 0x82 nanoslp syz-executor 40493 511951 86225 0 3 0x82 nanoslp syz-executor 62925 501574 86225 0 3 0x82 nanoslp syz-executor 42339 220887 86225 0 3 0x82 nanoslp syz-executor 40184 509122 86225 0 3 0x82 nanoslp syz-executor 8429 398059 86225 0 3 0x82 nanoslp syz-executor 86225 51656 1334 0 7 0x2 syz-executor 1334 322264 27563 0 3 0x10008a sigsusp ksh 27563 323900 89987 0 3 0x98 kqread sshd-session 89987 205210 14328 0 3 0x92 kqread sshd-session 55601 235075 1 0 3 0x100083 ttyin getty 14328 148216 1 0 3 0x88 kqread sshd 8877 512956 99543 74 3 0x1100092 bpf pflogd 99543 13037 1 0 3 0x80 sbwait pflogd 89166 439806 82231 73 3 0x1100090 kqread syslogd 82231 296485 1 0 3 0x100082 sbwait syslogd 75963 109432 1 0 3 0x100080 kqread resolvd 37314 107032 51212 77 3 0x100092 kqread dhcpleased 83548 54648 51212 77 3 0x100092 kqread dhcpleased 51212 378950 1 0 3 0x80 kqread dhcpleased 2502 292943 0 0 3 0x14200 bored smr 13502 130628 0 0 2 0x14200 zerothread 97298 274047 0 0 3 0x14200 aiodoned aiodoned 87608 278147 0 0 3 0x14200 syncer update 66317 1012 0 0 3 0x14200 cleaner cleaner 7830 216102 0 0 3 0x14200 reaper reaper 23810 195142 0 0 3 0x14200 pgdaemon pagedaemon 25639 424381 0 0 3 0x14200 bored viomb 46427 193704 0 0 3 0x40014200 acpi0 acpi0 19956 116262 0 0 3 0x40014200 idle1 63753 317120 0 0 3 0x14200 bored softnet1 54244 377298 0 0 3 0x14200 bored softnet0 29574 138631 0 0 3 0x14200 bored systqmp 90602 470391 0 0 3 0x14200 bored systq 55079 367946 0 0 3 0x14200 tmoslp softclockmp 85652 216133 0 0 3 0x40014200 tmoslp softclock 63512 471525 0 0 3 0x40014200 idle0 1 245930 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/net/pipex.c:78 r = 0 (0xffffffff83869a10) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pipex_destroy_all_sessions+0x2f sys/net/pipex.c:144 #3 pppacclose+0x16f sys/net/if_pppx.c:1335 #4 spec_close+0x417 sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #7 fdrop+0x121 sys/kern/kern_descrip.c:1280 #8 closef+0x192 sys/kern/kern_descrip.c:1264 #9 fdfree+0x116 sys/kern/kern_descrip.c:1195 #10 exit1+0x576 sys/kern/kern_exit.c:215 #11 sys_exit+0x1a sys/kern/kern_exit.c:-1 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #13 Xsyscall+0x128 Process 6162 (syz-executor) thread 0xffff8000fffe47f0 (460878) exclusive rwlock clonelk r = 0 (0xffffffff83832d58) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 if_clone_destroy+0x93 sys/net/if.c:-1 #3 ifioctl+0x59d sys/net/if.c:2160 #4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 Process 86225 (syz-executor) thread 0xffff80002a262d08 (51656) shared rwlock vmmaplk r = 0 (0xfffffd806eab4e68) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11062 12216K 12467K 166960K 12218 0 pcb 17 12K 12K 166960K 28 0 rtable 242 8K 8K 166960K 356 0 pf 35 17K 18K 166960K 55 0 ifaddr 43 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 59 0 sysctl 1 1K 9K 166960K 6 0 counters 72 37K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1498 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1378 87K 87K 166960K 1429 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 167 0 sigio 0 0K 0K 166960K 1 0 proc 69 115K 164K 166960K 528 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 381 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 234 167K 175K 166960K 3384 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 42 84K 102K 166960K 1294 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 12 0K 2K 166960K 30 0 temp 37 8666K 8730K 166960K 4288 0 kqueue 15 22K 27K 166960K 37 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 33 0 30 1 0 1 1 0 8 0 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 48 0 31 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 81 0 75 7 0 7 7 0 8 6 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 158 0 146 7 0 7 7 0 8 6 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 5 0 4 1 0 1 1 0 8 0 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 18 0 0 1 0 1 1 0 8 0 pfstkey 128 19 0 1 1 0 1 1 0 8 0 pfstate 448 19 0 1 3 0 3 3 0 8 1 pfrule 1344 22 0 17 2 1 1 2 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 40 453 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1630 0 117 95 0 95 95 0 8 0 ffsino 296 1630 0 117 117 0 117 117 0 8 0 nchpl 144 1863 0 162 64 0 64 64 0 8 0 rtmask 32 1 0 0 1 0 1 1 0 8 0 vnodes 216 1769 0 0 99 0 99 99 0 8 0 namei 1024 5811 0 5811 1 0 1 1 0 8 1 percpumem 16 55 0 4 1 0 1 1 0 8 0 kstatmem 264 30 0 4 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6550 0 6549 9 1 8 8 1 8 7 plimitpl 152 30 0 12 1 0 1 1 0 8 0 sigapl 424 476 0 429 7 0 7 7 0 8 1 knotepl 120 536 0 0 17 0 17 17 0 8 0 kqueuepl 224 36 0 23 1 0 1 1 0 8 0 pipepl 344 119 0 92 3 0 3 3 0 8 0 fdescpl 528 460 0 429 3 0 3 3 0 8 0 filepl 160 1880 0 1656 17 0 17 17 0 8 4 lockfpl 104 142 0 140 2 0 2 2 0 8 1 lockfspl 48 8 0 6 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 80 0 67 1 0 1 1 0 8 0 zombiepl 144 430 0 429 1 0 1 1 0 8 0 processpl 1232 476 0 429 5 0 5 5 0 8 0 procpl 664 533 0 479 6 0 6 6 0 8 0 sosppl 176 2 0 1 1 0 1 1 0 8 0 sockpl 752 241 0 209 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 249 0 0 16 0 16 16 0 8 0 bufpl 280 2436 0 130 165 0 165 165 0 8 0 anonpl 32 5647 0 0 46 0 46 46 0 246 0 amapchunkpl 152 9338 0 8879 26 0 26 26 0 158 7 amappl16 200 1486 0 1464 5 1 4 5 0 8 2 amappl15 192 19 0 19 1 1 0 1 0 8 0 amappl14 184 7 0 7 1 1 0 1 0 8 0 amappl13 176 430 0 429 1 0 1 1 0 8 0 amappl12 168 820 0 778 3 0 3 3 0 8 0 amappl11 160 2 0 2 1 1 0 1 0 8 0 amappl10 152 90 0 76 1 0 1 1 0 8 0 amappl9 144 257 0 257 1 1 0 1 0 8 0 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 79 0 78 1 0 1 1 0 8 0 amappl6 120 271 0 258 1 0 1 1 0 8 0 amappl5 112 74 0 63 1 0 1 1 0 8 0 amappl4 104 426 0 397 1 0 1 1 0 8 0 amappl3 96 1468 0 1382 3 0 3 3 0 8 0 amappl2 88 564 0 492 2 0 2 2 0 8 0 amappl1 80 9197 0 8611 14 0 14 14 0 8 0 amappl 88 2646 0 2491 4 0 4 4 0 92 0 uvmvnodes 80 99 0 0 3 0 3 3 0 8 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 460 0 429 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 460 0 429 1 0 1 1 0 8 0 vmmpekpl 168 5531 0 5499 2 0 2 2 0 8 0 vmmpepl 168 36995 0 35115 87 0 87 87 0 357 2 vmsppl 488 459 0 429 5 0 5 5 0 8 1 rwobjpl 80 13272 0 12264 23 0 23 23 0 8 1 pdppl 4096 927 0 858 97 26 71 83 0 8 2 pvpl 32 11548 0 0 95 1 94 94 0 265 0 pmappl 256 459 0 429 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 281 0 28 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b761f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f2604,ffffffff8340ebf5,1cb,ffffffff833ac17c) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff8000fffddbf0) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff8000015a4000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff8000015a4000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,81,2000,ffff8000fffe4fb8) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c3f8700) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8068f1d2c0,81,fffffd80097fd3a8,ffff8000fffe4fb8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8068e5b118,ffff8000fffe4fb8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8068e5b118,ffff8000fffe4fb8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8068e5b118,ffff8000fffe4fb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8068e5b118,ffff8000fffe4fb8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe4fb8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe4fb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe4fb8,ffff80003c3f8a70,ffff80003c3f89c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3f8a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3f8a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74783d8ce500, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 msleep_nsec(fffffd806f6b01c0,fffffd806f6b01c0,318,ffffffff834149fb,3b0232b1) at msleep_nsec+0x19b sys/kern/kern_synch.c:202 kqueue_sleep(fffffd806f6b01c0,ffff80002a2d42c0) at kqueue_sleep+0x127 sys/kern/kern_event.c:1608 kqueue_scan(ffff80002a2d4080,8,ffff80002a2d3f80,ffff80002a2d42c0,ffff80002a262d08,ffff80002a2d422c) at kqueue_scan+0x223 sys/kern/kern_event.c:1663 dopselect(ffff80002a262d08,32,7e3b994f5b20,0,0,ffff80002a2d42c0,cbb8482091717133,ffff80002a2d4360) at dopselect+0x53e sys/kern/sys_generic.c:691 sys_pselect(ffff80002a262d08,ffff80002a2d4410,ffff80002a2d4360) at sys_pselect+0x25a sys/kern/sys_generic.c:589 syscall(ffff80002a2d4410) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d4410) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e3b994f5ad0, count: 4 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 msleep_nsec(fffffd806f6b01c0,fffffd806f6b01c0,318,ffffffff834149fb,3b0232b1) at msleep_nsec+0x19b sys/kern/kern_synch.c:202 kqueue_sleep(fffffd806f6b01c0,ffff80002a2d42c0) at kqueue_sleep+0x127 sys/kern/kern_event.c:1608 kqueue_scan(ffff80002a2d4080,8,ffff80002a2d3f80,ffff80002a2d42c0,ffff80002a262d08,ffff80002a2d422c) at kqueue_scan+0x223 sys/kern/kern_event.c:1663 dopselect(ffff80002a262d08,32,7e3b994f5b20,0,0,ffff80002a2d42c0,cbb8482091717133,ffff80002a2d4360) at dopselect+0x53e sys/kern/sys_generic.c:691 sys_pselect(ffff80002a262d08,ffff80002a2d4410,ffff80002a2d4360) at sys_pselect+0x25a sys/kern/sys_generic.c:589 syscall(ffff80002a2d4410) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d4410) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e3b994f5ad0, count: -11