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 508458 21778 77 0x100012 0x1 0 dhcpleased db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b5922) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f2bbe,ffffffff8340e2f3,1cb,ffffffff833ab4b5) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff80003c4577e0) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff800001590800) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001590800) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,81,2000,ffff80003c412558) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c411b90) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f510718,81,fffffd80097fd4e0,ffff80003c412558) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d384928,ffff80003c412558) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d384928,ffff80003c412558) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d384928,ffff80003c412558) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806d384928,ffff80003c412558) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c412558) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c412558,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c412558,ffff80003c411f00,ffff80003c411e50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003c411ef0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b5922) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f2bbe,ffffffff8340e2f3,1cb,ffffffff833ab4b5) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff80003c4577e0) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff800001590800) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001590800) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,81,2000,ffff80003c412558) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c411b90) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f510718,81,fffffd80097fd4e0,ffff80003c412558) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d384928,ffff80003c412558) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d384928,ffff80003c412558) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d384928,ffff80003c412558) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806d384928,ffff80003c412558) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c412558) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c412558,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c412558,ffff80003c411f00,ffff80003c411e50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c411f00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c411f00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761ccadc5770, count: -16 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c411960 rbx 0xffff8000299dee07 rdx 0 rcx 0xffff80003c412558 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7494e78f7343fea9 r11 0xf81416a5fc2fc8f4 r12 0xffff8000299dec08 r13 0 r14 0 r15 0x1 rip 0xffffffff81872d75 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c411950 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=108777 pid=29228 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c412558 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003abf9778,0xffff80003c412fc8 process=0xffff8000ffff6688 user=0xffff80003c40c000, vmspace=0xfffffd805ff4f5e0 estcpu=36, cpticks=7, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25234 194930 71176 0 3 0x80 nanoslp syz-executor 25234 101250 71176 0 3 0x4000080 fsleep syz-executor 25234 411484 71176 0 3 0x4000080 fsleep syz-executor 25234 92430 71176 0 3 0x4000080 bell syz-executor 56838 86204 34673 0 3 0x80 nanoslp syz-executor 56838 202680 34673 0 3 0x4000080 fifor syz-executor 56838 149109 34673 0 3 0x4000080 fsleep syz-executor 56838 476708 34673 0 3 0x4000080 kqread syz-executor 71725 40604 98736 0 3 0x80 nanoslp syz-executor 71725 522346 98736 0 3 0x4000080 kqsel syz-executor 71725 374624 98736 0 3 0x4000080 fsleep syz-executor 83122 337169 29092 0 3 0x82 nanoslp syz-executor 46730 395132 29092 0 3 0x2 biowait syz-executor 66474 290468 0 0 3 0x14200 acct acct 77280 322815 29092 0 3 0x82 wait syz-executor 44932 264594 29092 0 3 0x82 nanoslp syz-executor 71176 131495 29092 0 3 0x82 nanoslp syz-executor 98736 482471 29092 0 3 0x82 nanoslp syz-executor 4167 229559 29092 0 3 0x82 nanoslp syz-executor 34673 512591 29092 0 3 0x82 nanoslp syz-executor 29092 160883 58308 0 2 0x2 syz-executor 58308 196046 86882 0 3 0x10008a sigsusp ksh 86882 186650 54374 0 3 0x98 kqread sshd-session 54374 504027 2771 0 3 0x92 kqread sshd-session 35732 228987 1 0 3 0x100083 ttyopn getty 2771 45673 1 0 3 0x88 kqread sshd 91541 72762 31987 74 3 0x1100092 bpf pflogd 31987 338298 1 0 3 0x80 sbwait pflogd 23853 403650 16806 73 3 0x1100090 kqread syslogd 16806 476629 1 0 3 0x100082 sbwait syslogd 45264 263061 1 0 3 0x100080 kqread resolvd 21778 508458 14554 77 7 0x100013 dhcpleased 85049 143369 14554 77 3 0x100092 kqread dhcpleased 14554 9979 1 0 3 0x80 kqread dhcpleased 7894 264827 0 0 3 0x14200 bored smr 25754 343832 0 0 3 0x14200 pgzero zerothread 43315 224760 0 0 3 0x14200 aiodoned aiodoned 56818 433766 0 0 3 0x14200 syncer update 97862 424970 0 0 3 0x14200 cleaner cleaner 13427 87526 0 0 3 0x14200 reaper reaper 92096 46476 0 0 3 0x14200 pgdaemon pagedaemon 28793 450643 0 0 3 0x14200 bored viomb 91622 442036 0 0 3 0x40014200 acpi0 acpi0 53326 342504 0 0 3 0x40014200 idle1 82080 74963 0 0 3 0x14200 bored softnet1 60914 13511 0 0 3 0x14200 bored softnet0 76421 454226 0 0 3 0x14200 bored systqmp 25249 420355 0 0 3 0x14200 bored systq 72342 327291 0 0 3 0x14200 tmoslp softclockmp 73590 429104 0 0 3 0x40014200 tmoslp softclock 77605 467485 0 0 3 0x40014200 idle0 1 501100 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex /syzkaller/managers/multicore/kernel/sys/net/pipex.c:78 r = 0 (0xffffffff8386b460) #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 46730 (syz-executor) thread 0xffff80003abf9ca8 (395132) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11077 12098K 13399K 166960K 13317 0 pcb 17 16K 17K 166960K 336 0 rtable 230 15K 15K 166960K 671 0 pf 39 18K 19K 166960K 155 0 ifaddr 40 7K 8K 166960K 116 0 ifgroup 62 2K 3K 166960K 199 0 sysctl 4 1K 9K 166960K 12 0 counters 74 37K 38K 166960K 220 0 ioctlops 0 0K 4K 166960K 1865 0 iov 0 0K 16K 166960K 216 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1464 92K 92K 166960K 2286 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 64 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 1067 0 sigio 1 0K 0K 166960K 14 0 proc 72 115K 180K 166960K 703 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 147 0 in_multi 87 6K 7K 166960K 169 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 121 546K 546K 166960K 121 0 exec 0 0K 1K 166960K 536 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 67 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 168K 187K 166960K 11524 0 UVM aobj 28 8K 8K 166960K 31 0 pinsyscall 42 84K 106K 166960K 2279 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 77 0 NDP 13 0K 2K 166960K 83 0 temp 65 8676K 8751K 166960K 60597 0 kqueue 13 20K 27K 166960K 188 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 144 0 140 2 1 1 2 0 8 0 rtentry 176 161 0 72 6 0 6 6 0 8 0 unpcb 144 816 0 797 9 4 5 6 0 8 4 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 321 0 317 7 5 2 7 0 8 1 arp 136 25 0 11 1 0 1 1 0 8 0 inpcb 328 1415 0 1405 11 4 7 10 0 8 5 nd6 152 36 0 12 2 0 2 2 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 57 0 56 1 0 1 1 0 8 0 pppxif 1504 5 0 5 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 44 0 35 1 0 1 1 0 482 0 pffrnode 88 44 0 35 1 0 1 1 0 8 0 pffrent 40 81 0 72 1 0 1 1 0 8 0 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 70 0 15 1 0 1 1 0 8 0 pfstkey 128 72 0 16 2 0 2 2 0 8 0 pfstate 448 70 0 16 6 0 6 6 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 706 0 294 32 3 29 31 0 8 1 art_table 40 708 0 294 5 0 5 5 0 8 0 art_node 32 161 0 81 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 61 0 51 1 0 1 1 0 8 0 shmpl 112 27 0 3 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 3415 0 1895 96 0 96 96 0 8 0 ffsino 296 3415 0 1895 118 0 118 118 0 8 0 nchpl 144 4930 0 3217 64 0 64 64 0 8 0 rtmask 32 15 0 14 2 1 1 1 0 8 0 vnodes 216 3954 0 0 220 0 220 220 0 8 0 namei 1024 16808 0 16807 2 1 1 2 0 8 0 percpumem 16 125 0 73 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 848 1 0 0 1 0 1 1 0 8 0 kstatmem 264 124 0 94 4 1 3 3 0 8 1 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 20047 0 20046 11 8 3 8 1 8 2 plimitpl 152 244 0 226 1 0 1 1 0 8 0 sigapl 424 1379 0 1331 7 1 6 7 0 8 0 knotepl 120 516 0 0 16 0 16 16 0 8 0 kqueuepl 224 538 0 526 7 2 5 5 0 8 4 pipepl 344 198 0 170 3 0 3 3 0 8 0 fdescpl 528 1355 0 1324 3 0 3 3 0 8 0 filepl 160 9120 0 8890 23 8 15 22 0 8 4 lockfpl 104 383 0 380 1 0 1 1 0 8 0 lockfspl 48 162 0 159 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 1344 0 1331 1 0 1 1 0 8 0 zombiepl 144 1335 0 1331 1 0 1 1 0 8 0 processpl 1232 1379 0 1331 5 1 4 5 0 8 0 procpl 664 2934 0 2878 6 0 6 6 0 8 0 sosppl 176 6 0 6 3 2 1 1 0 8 1 sockpl 752 2483 0 2450 29 19 10 17 0 8 6 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 37 0 0 5 0 5 5 0 8 0 mtagpl 96 14 0 0 1 0 1 1 0 8 0 mbufpl 256 1191 0 0 74 0 74 74 0 8 0 bufpl 280 6982 0 846 439 0 439 439 0 8 0 anonpl 32 9918 0 0 80 0 80 80 0 246 0 amapchunkpl 152 39235 0 38695 37 4 33 33 0 158 8 amappl16 200 4083 0 4042 22 14 8 17 0 8 5 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 10 0 10 1 1 0 1 0 8 0 amappl13 176 462 0 461 1 0 1 1 0 8 0 amappl12 168 1736 0 1694 4 1 3 4 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 51 0 37 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 93 0 92 1 0 1 1 0 8 0 amappl6 120 320 0 306 1 0 1 1 0 8 0 amappl5 112 80 0 68 1 0 1 1 0 8 0 amappl4 104 436 0 407 1 0 1 1 0 8 0 amappl3 96 6644 0 6548 3 0 3 3 0 8 0 amappl2 88 1481 0 1403 2 0 2 2 0 8 0 amappl1 80 13465 0 12872 16 2 14 15 0 8 0 amappl 88 10567 0 10389 5 0 5 5 0 92 0 uvmvnodes 80 137 0 0 3 0 3 3 0 8 0 dma16384 16384 1 0 1 1 1 0 1 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 7 0 7 2 2 0 1 0 8 0 dma128 128 255 0 255 3 3 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 30 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1355 0 1324 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1355 0 1324 1 0 1 1 0 8 0 vmmpekpl 168 12445 0 12393 3 0 3 3 0 8 0 vmmpepl 168 91380 0 89419 99 4 95 99 0 357 3 vmsppl 488 1354 0 1324 6 1 5 5 0 8 0 rwobjpl 80 26059 0 24936 28 1 27 28 0 8 0 pdppl 4096 2719 0 2649 106 32 74 87 0 8 4 pvpl 32 18411 0 0 152 3 149 149 0 265 0 pmappl 256 1355 0 1324 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 361 0 46 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8380fff0) 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 __mp_lock(ffffffff83902f00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83902f00) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a29a7e0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83902f00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83902f00) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsyscall(ffff80002a2627d8,79,18,ffff80002a29aa90) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a2627d8,79,18,ffff80002a29aa90) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a29aa90) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a29aa90) at syscall+0x304 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc5ac8a3640, count: 5 ddb{0}> trace x86_ipi_db(ffffffff8380fff0) 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 __mp_lock(ffffffff83902f00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83902f00) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a29a7e0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83902f00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83902f00) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsyscall(ffff80002a2627d8,79,18,ffff80002a29aa90) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a2627d8,79,18,ffff80002a29aa90) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a29aa90) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a29aa90) at syscall+0x304 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc5ac8a3640, count: -10 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b5922) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f2bbe,ffffffff8340e2f3,1cb,ffffffff833ab4b5) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff80003c4577e0) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff800001590800) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001590800) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,81,2000,ffff80003c412558) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c411b90) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f510718,81,fffffd80097fd4e0,ffff80003c412558) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d384928,ffff80003c412558) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d384928,ffff80003c412558) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d384928,ffff80003c412558) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806d384928,ffff80003c412558) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c412558) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c412558,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c412558,ffff80003c411f00,ffff80003c411e50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003c411ef0, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b5922) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f2bbe,ffffffff8340e2f3,1cb,ffffffff833ab4b5) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff80003c4577e0) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff800001590800) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001590800) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,81,2000,ffff80003c412558) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c411b90) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f510718,81,fffffd80097fd4e0,ffff80003c412558) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d384928,ffff80003c412558) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d384928,ffff80003c412558) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d384928,ffff80003c412558) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806d384928,ffff80003c412558) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c412558) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c412558,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c412558,ffff80003c411f00,ffff80003c411e50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c411f00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c411f00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761ccadc5770, count: -16