panic: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459 Starting stack trace... panic(ffffffff834510ef) at panic+0x1d0 sys/kern/subr_prf.c:229 __assert(ffffffff8348bb2c,ffffffff834a45f5,1cb,ffffffff83443957) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff8000367a8e00) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff800001608000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001608000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(6384,81,2000,ffff8000fffea7e8) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c403090) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80724dda40,81,fffffd80097fd5b0,ffff8000fffea7e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d4f00b8,ffff8000fffea7e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d4f00b8,ffff8000fffea7e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d4f00b8,ffff8000fffea7e8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806d4f00b8,ffff8000fffea7e8) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffea7e8) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffea7e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffea7e8,ffff80003c403400,ffff80003c403350) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c403400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c403400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7215500654c0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 -136258184 EXIT 0 3 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *495096 25425 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7bd0f7e0dd60, count: 14 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}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu1: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7bd0f7e0dd60, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2ceba0 rbx 0 rdx 0 rcx 0xffff8000ffffd4c8 rax 0x3b r8 0xffff80002a2cead0 r9 0 r10 0x502d8777ab2c7e4d r11 0x352c58fb139f81fa r12 0 r13 0 r14 0xffff8000ffffd4c8 r15 0 rip 0xffffffff8291d3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a2ceb20 ss 0 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=495096 pid=25425 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=78, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a243c98,0xffff8000ffffdca0 process=0xffff8000ffff04e0 user=0xffff80002a2c9000, vmspace=0xfffffd806ea953e0 estcpu=28, cpticks=55, pctcpu=0.14, user=2, sys=52, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 67534 291652 76947 0 2 0 syz-executor 67534 118413 76947 0 2 0x4000000 syz-executor 67534 440140 76947 0 3 0x4000080 fsleep syz-executor 864 203666 78386 0 3 0x90 fsleep syz-executor 864 68151 78386 0 2 0x4000010 syz-executor 79507 433931 33283 0 3 0x80 fsleep syz-executor 79507 31317 33283 0 3 0x4000080 piperd syz-executor 16214 358797 11412 0 3 0x80 fsleep syz-executor 16214 33894 11412 0 3 0x4000080 fifor syz-executor 27460 328331 59839 0 3 0x80 fsleep syz-executor 27460 180980 59839 0 3 0x4000080 lockf syz-executor 27460 397113 59839 0 3 0x4000080 fsleep syz-executor 97445 172145 25425 0 3 0x80 fsleep syz-executor 97445 437749 25425 0 3 0x4000080 kqread syz-executor 76947 200370 4857 0 2 0xc82 syz-executor 33283 306249 4857 0 2 0xc82 syz-executor 42348 300612 41262 60929 3 0x3010 suspend syz-executor 42348 259268 41262 60929 2 0x4081010 syz-executor 42348 383489 41262 60929 3 0x4081010 inode syz-executor 42348 303931 41262 60929 3 0x4081010 inode syz-executor 41262 253227 4857 0 3 0x82 wait syz-executor 16525 315730 1 0 2 0x100083 getty 78386 139844 4857 0 2 0xc82 syz-executor 80968 423424 0 0 3 0x14200 acct acct 56821 356488 4857 0 2 0xc82 syz-executor 11412 452599 4857 0 2 0xc82 syz-executor 59839 450719 4857 0 2 0xc82 syz-executor *25425 495096 4857 0 7 0x2 syz-executor 4857 212552 86295 0 2 0x2 syz-executor 86295 447939 87627 0 3 0x10008a sigsusp ksh 87627 477812 64005 0 3 0x98 kqread sshd-session 64005 15695 49555 0 3 0x92 kqread sshd-session 49555 457132 1 0 3 0x88 kqread sshd 9106 287209 664 74 3 0x1100092 bpf pflogd 664 483914 1 0 3 0x80 sbwait pflogd 69523 91620 27528 73 2 0x1100090 syslogd 27528 245460 1 0 3 0x100082 sbwait syslogd 38402 327712 1 0 3 0x100080 kqread resolvd 65089 27586 67947 77 3 0x100092 kqread dhcpleased 31507 6368 67947 77 2 0x100012 dhcpleased 67947 182710 1 0 3 0x80 kqread dhcpleased 54078 65217 0 0 3 0x14200 bored smr 79603 121296 0 0 3 0x14200 pgzero zerothread 57117 184762 0 0 3 0x14200 aiodoned aiodoned 34443 125853 0 0 3 0x14200 syncer update 32500 176056 0 0 3 0x14200 cleaner cleaner 75441 326770 0 0 3 0x14200 reaper reaper 57676 149397 0 0 3 0x14200 pgdaemon pagedaemon 7667 22948 0 0 3 0x14200 bored viomb 36156 403311 0 0 3 0x40014200 acpi0 acpi0 36144 96914 0 0 3 0x40014200 idle1 63038 299809 0 0 3 0x14200 bored softnet1 98594 293831 0 0 2 0x14200 softnet0 96883 205453 0 0 3 0x14200 bored systqmp 40810 503424 0 0 3 0x14200 bored systq 35387 307797 0 0 3 0x14200 tmoslp softclockmp 885 68102 0 0 3 0x40014200 tmoslp softclock 4867 27622 0 0 3 0x40014200 idle0 1 409390 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex /syzkaller/managers/multicore/kernel/sys/net/pipex.c:78 r = 0 (0xffffffff838d7d90) #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:1281 #8 closef+0x192 sys/kern/kern_descrip.c:1265 #9 fdfree+0x116 sys/kern/kern_descrip.c:1196 #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:783 #13 Xsyscall+0x128 Process 42348 (syz-executor) thread 0xffff80002a25aa78 (259268) Process 42348 (syz-executor) thread 0xffff80002a25a7e0 (383489) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11097 12171K 12394K 166960K 13789 0 pcb 20 15K 17K 166960K 355 0 rtable 192 11K 11K 166960K 699 0 pf 32 17K 19K 166960K 160 0 ifaddr 34 6K 7K 166960K 128 0 ifgroup 51 2K 2K 166960K 201 0 sysctl 4 1K 9K 166960K 18 0 counters 70 36K 38K 166960K 234 0 ioctlops 0 0K 8K 166960K 1792 0 iov 0 0K 32K 166960K 64 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1348 85K 85K 166960K 2405 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 80 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 1343 0 sigio 0 0K 0K 166960K 91 0 proc 76 131K 180K 166960K 791 0 subproc 72 4K 4K 166960K 109 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 105 0 in_multi 65 4K 7K 166960K 199 0 ether_multi 1 0K 0K 166960K 23 0 mrt 2 0K 0K 166960K 34 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 633 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 244 159K 177K 166960K 14113 0 UVM aobj 45 16K 16K 166960K 50 0 pinsyscall 43 86K 100K 166960K 2632 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 97 0 NDP 11 0K 2K 166960K 90 0 temp 69 9082K 9337K 166960K 54199 0 kqueue 16 24K 32K 166960K 267 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 120 183 0 180 3 2 1 3 0 8 0 rtentry 176 190 0 120 5 0 5 5 0 8 0 unpcb 144 1001 0 949 9 6 3 6 0 8 1 syncache 336 9 0 9 3 3 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 501 0 494 8 7 1 7 0 8 0 arp 136 29 0 17 1 0 1 1 0 8 0 inpcb 328 1543 0 1529 17 14 3 10 0 8 1 nd6 152 41 0 23 1 0 1 1 0 8 0 pkpcb 40 12 0 12 2 2 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 65 0 64 2 1 1 1 0 8 0 pppxif 1576 6 0 6 3 2 1 1 0 8 1 pffrag 232 30 0 20 1 0 1 1 0 482 0 pffrnode 88 30 0 20 1 0 1 1 0 8 0 pffrent 40 51 0 41 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfstitem 24 92 0 32 1 0 1 1 0 8 0 pfstkey 128 92 0 32 2 0 2 2 0 8 0 pfstate 448 92 0 32 7 0 7 7 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 5 0 2 4 0 4 4 0 8 1 art_heap4 256 900 0 575 36 12 24 29 0 8 3 art_table 40 905 0 577 5 0 5 5 0 8 0 art_node 32 189 0 128 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 19 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 77 0 67 1 0 1 1 0 8 0 shmpl 112 41 0 5 2 0 2 2 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 3943 0 2477 93 0 93 93 0 8 0 ffsino 296 3943 0 2477 114 0 114 114 0 8 0 nchpl 144 5789 0 4065 64 0 64 64 0 8 0 rtmask 32 11 0 10 3 2 1 1 0 8 0 vnodes 216 4571 0 0 254 0 254 254 0 8 0 namei 1024 20845 0 20843 3 2 1 2 0 8 0 percpumem 16 132 0 82 1 0 1 1 0 8 0 vcpupl 3968 6 0 0 1 0 1 1 0 8 0 vmpool 848 6 0 0 1 0 1 1 0 8 0 kstatmem 264 132 0 106 5 2 3 3 0 8 1 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 47130 0 47129 12 10 2 8 1 8 1 plimitpl 152 457 0 439 1 0 1 1 0 8 0 sigapl 424 1660 0 1611 7 1 6 7 0 8 0 knotepl 120 585 0 0 18 0 18 18 0 8 0 kqueuepl 224 524 0 511 7 6 1 5 0 8 0 pipepl 344 326 0 298 7 4 3 6 0 8 0 fdescpl 528 1641 0 1609 3 0 3 3 0 8 0 filepl 160 10747 0 10482 26 12 14 20 0 8 1 lockfpl 104 732 0 726 2 1 1 2 0 8 0 lockfspl 48 274 0 269 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 62 0 45 1 0 1 1 0 8 0 ucredpl 104 1477 0 1461 1 0 1 1 0 8 0 zombiepl 144 1816 0 1814 1 0 1 1 0 8 0 processpl 1232 1660 0 1611 5 0 5 5 0 8 0 procpl 664 3698 0 3638 6 0 6 6 0 8 0 sosppl 176 6 0 6 3 3 0 1 0 8 0 sockpl 752 2780 0 2711 29 20 9 16 0 8 2 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 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 123 0 0 16 0 16 16 0 8 1 mcl2k 2048 35 0 0 5 1 4 5 0 8 0 mtagpl 96 139 0 0 4 0 4 4 0 8 0 mbufpl 256 1205 0 0 75 0 75 75 0 8 0 bufpl 280 19723 0 13592 439 0 439 439 0 8 0 anonpl 32 12762 0 0 103 0 103 103 0 246 0 amapchunkpl 152 46069 0 45544 38 11 27 33 0 158 5 amappl16 200 6363 0 6106 40 24 16 28 0 8 2 amappl15 192 79 0 79 2 2 0 1 0 8 0 amappl14 184 478 0 476 1 0 1 1 0 8 0 amappl13 176 140 0 128 1 0 1 1 0 8 0 amappl12 168 1911 0 1880 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 67 0 53 1 0 1 1 0 8 0 amappl9 144 271 0 270 1 0 1 1 0 8 0 amappl8 136 116 0 113 1 0 1 1 0 8 0 amappl7 128 191 0 177 1 0 1 1 0 8 0 amappl6 120 195 0 194 1 0 1 1 0 8 0 amappl5 112 100 0 89 1 0 1 1 0 8 0 amappl4 104 325 0 304 1 0 1 1 0 8 0 amappl3 96 9574 0 9450 4 0 4 4 0 8 0 amappl2 88 620 0 555 2 0 2 2 0 8 0 amappl1 80 16293 0 15682 22 8 14 17 0 8 0 amappl 88 13083 0 12910 5 0 5 5 0 92 0 uvmvnodes 80 134 0 0 3 0 3 3 0 8 0 dma32768 32768 2 0 2 2 2 0 1 0 8 0 dma8192 8192 1 0 1 1 0 1 1 0 8 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 49 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1641 0 1609 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1641 0 1609 1 0 1 1 0 8 0 vmmpekpl 168 15337 0 15283 3 0 3 3 0 8 0 vmmpepl 168 113163 0 110934 115 10 105 111 0 357 6 vmsppl 488 1640 0 1609 7 2 5 5 0 8 0 rwobjpl 80 33017 0 31652 38 6 32 33 0 8 0 pdppl 4096 3301 0 3224 119 40 79 83 0 8 2 pvpl 32 20935 0 0 171 2 169 169 0 265 0 pmappl 256 1646 0 1609 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 388 0 72 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7bd0f7e0dd60, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299bdff0) 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(ffffffff83a79b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a79b80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83a79b80,2) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 tsleep_nsec(fffffd806d8b1d38,11,ffffffff834f580a,ffffffffffffffff) at tsleep_nsec+0x23d sys/kern/kern_synch.c:-1 biowait(fffffd806d8b1d38) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd806d8b1d38) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ffs_update(fffffd806c5f9718,1) at ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 ffs_truncate(fffffd806c5f9718,0,0,ffffffffffffffff) at ffs_truncate+0xc9b sys/ufs/ffs/ffs_inode.c:-1 ufs_inactive(ffff80003c402cb0) at ufs_inactive+0x202 sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd805c2ad960,ffff8000fffea7e8) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 vput(fffffd805c2ad960) at vput+0xe5 sys/kern/vfs_subr.c:789 vn_close(fffffd805c2ad960,2,ffffffffffffffff,ffff8000fffea7e8) at vn_close+0xb7 sys/kern/vfs_vnops.c:294 end trace frame: 0xffff80003c402dc0, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299bdff0) 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(ffffffff83a79b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a79b80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83a79b80,2) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 tsleep_nsec(fffffd806d8b1d38,11,ffffffff834f580a,ffffffffffffffff) at tsleep_nsec+0x23d sys/kern/kern_synch.c:-1 biowait(fffffd806d8b1d38) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd806d8b1d38) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ffs_update(fffffd806c5f9718,1) at ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 ffs_truncate(fffffd806c5f9718,0,0,ffffffffffffffff) at ffs_truncate+0xc9b sys/ufs/ffs/ffs_inode.c:-1 ufs_inactive(ffff80003c402cb0) at ufs_inactive+0x202 sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd805c2ad960,ffff8000fffea7e8) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 vput(fffffd805c2ad960) at vput+0xe5 sys/kern/vfs_subr.c:789 vn_close(fffffd805c2ad960,2,ffffffffffffffff,ffff8000fffea7e8) at vn_close+0xb7 sys/kern/vfs_vnops.c:294 acct_shutdown() at acct_shutdown+0x8a sys/kern/kern_acct.c:361 vfs_shutdown(ffff8000fffea7e8) at vfs_shutdown+0x23 sys/kern/vfs_subr.c:1791 boot(100) at boot+0x16f sys/arch/amd64/amd64/machdep.c:929 reboot(100) at reboot+0xb1 panic(ffffffff834510ef) at panic+0x1f9 __assert(ffffffff8348bb2c,ffffffff834a45f5,1cb,ffffffff83443957) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff8000367a8e00) at pipex_unlink_session_locked+0x429 pipex_destroy_all_sessions(ffff800001608000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001608000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(6384,81,2000,ffff8000fffea7e8) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003c403090) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80724dda40,81,fffffd80097fd5b0,ffff8000fffea7e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d4f00b8,ffff8000fffea7e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d4f00b8,ffff8000fffea7e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d4f00b8,ffff8000fffea7e8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806d4f00b8,ffff8000fffea7e8) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff8000fffea7e8) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff8000fffea7e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffea7e8,ffff80003c403400,ffff80003c403350) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c403400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c403400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7215500654c0, count: -33