panic: pr_find_pagehead: mbufpl: page header missing Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff824249be) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_put(ffffffff82848690,fffffd8052000000) at pool_do_put+0x36a pool_put(ffffffff82848690,fffffd8052000000) at pool_put+0x4b sys/kern/subr_pool.c:794 m_free(fffffd8052000000) at m_free+0x119 sys/kern/uipc_mbuf.c:459 ml_purge(ffff80001d780998) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline] ml_purge(ffff80001d780998) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628 ifq_purge(ffff800000ac4a78) at ifq_purge+0x97 sys/net/ifq.c:462 tun_dev_close(5d01,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460 spec_close(ffff80001d780ac0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805db598f0,7,fffffd806c3bf960,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80576e61f0,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80576e61f0,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195 end trace frame: 0xffff80001d780d10, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic pr_find_pagehead: mbufpl: page header missing ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff824249be) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_put(ffffffff82848690,fffffd8052000000) at pool_do_put+0x36a pool_put(ffffffff82848690,fffffd8052000000) at pool_put+0x4b sys/kern/subr_pool.c:794 m_free(fffffd8052000000) at m_free+0x119 sys/kern/uipc_mbuf.c:459 ml_purge(ffff80001d780998) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline] ml_purge(ffff80001d780998) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628 ifq_purge(ffff800000ac4a78) at ifq_purge+0x97 sys/net/ifq.c:462 tun_dev_close(5d01,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460 spec_close(ffff80001d780ac0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805db598f0,7,fffffd806c3bf960,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80576e61f0,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80576e61f0,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa388,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6aa388,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6aa388,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6aa388) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d780f40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d780f40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe3030, count: -19 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d780740 rbx 0xffff80001d7807f0 rdx 0x2 rcx 0 rax 0x1 r8 0xffffffff815644df kprintf+0x15f r9 0x1 r10 0x2 r11 0x3268c78c28458f85 r12 0x3000000008 r13 0xffff80001d780750 r14 0x100 r15 0x1 rip 0xffffffff8109a488 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d780730 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=3177 stat=onproc flags process=a proc=2000 pri=17, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6aa118,0xffff80001d6a9018 process=0xffff8000ffffb208 user=0xffff80001d77b000, vmspace=0xfffffd806bc0a440 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 80072 41595 44985 0 3 0x80 nanosleep syz-executor.0 80072 331951 44985 0 3 0x4000080 netcon syz-executor.0 80072 283991 44985 0 3 0x4000080 fsleep syz-executor.0 6433 51668 0 0 3 0x14280 nfsidl nfsio 64931 480297 0 0 3 0x14280 nfsidl nfsio 14997 248982 0 0 3 0x14280 nfsidl nfsio 52933 252398 0 0 3 0x14280 nfsidl nfsio 68246 302938 0 0 3 0x14280 nfsidl nfsio 98104 220968 0 0 3 0x14280 nfsidl nfsio 32503 487538 0 0 3 0x14280 nfsidl nfsio 13256 112104 0 0 3 0x14280 nfsidl nfsio 26974 343205 0 0 3 0x14280 nfsidl nfsio 36701 137212 0 0 3 0x14280 nfsidl nfsio 21296 321568 0 0 3 0x14280 nfsidl nfsio 29642 346082 0 0 3 0x14280 nfsidl nfsio 89756 142440 0 0 3 0x14280 nfsidl nfsio 27572 1613 0 0 3 0x14280 nfsidl nfsio 1761 326478 0 0 3 0x14280 nfsidl nfsio 79958 227564 0 0 3 0x14280 nfsidl nfsio 42397 380607 0 0 3 0x14280 nfsidl nfsio 70602 498952 0 0 3 0x14280 nfsidl nfsio 30629 290984 0 0 3 0x14280 nfsidl nfsio 66572 22385 0 0 3 0x14280 nfsidl nfsio 99345 513191 0 0 3 0x14200 acct acct 42807 68980 0 0 3 0x14200 bored sosplice 44985 120736 61540 0 3 0x82 nanosleep syz-executor.0 61540 211440 26367 0 2 0x82 syz-fuzzer 61540 157180 26367 0 3 0x4000082 nanosleep syz-fuzzer 61540 414957 26367 0 3 0x4000082 thrsleep syz-fuzzer 61540 196455 26367 0 3 0x4000082 thrsleep syz-fuzzer 61540 272952 26367 0 3 0x4000082 thrsleep syz-fuzzer 61540 433932 26367 0 3 0x4000082 thrsleep syz-fuzzer 61540 119942 26367 0 3 0x4000082 thrsleep syz-fuzzer 61540 189193 26367 0 3 0x4000082 thrsleep syz-fuzzer 26367 280452 68838 0 3 0x10008a pause ksh 68838 517019 79714 0 3 0x92 select sshd 82949 236981 1 0 3 0x100083 ttyin getty 79714 291314 1 0 3 0x80 select sshd 91015 40602 86468 73 3 0x100090 kqread syslogd 86468 190640 1 0 3 0x100082 netio syslogd 38121 116437 1 77 3 0x100090 poll dhclient 14725 195901 1 0 3 0x80 poll dhclient 13870 150548 0 0 3 0x14200 bored smr 43013 361617 0 0 2 0x14200 zerothread 65813 487576 0 0 3 0x14200 aiodoned aiodoned 69524 161700 0 0 3 0x14200 syncer update 70122 487010 0 0 3 0x14200 cleaner cleaner 75820 147745 0 0 3 0x14200 reaper reaper 80954 201297 0 0 3 0x14200 pgdaemon pagedaemon 52166 374145 0 0 3 0x14200 bored crynlk 81340 129215 0 0 3 0x14200 bored crypto 54175 145249 0 0 3 0x40014200 acpi0 acpi0 20855 245864 0 0 3 0x14200 bored softnet 77077 390391 0 0 3 0x14200 bored systqmp 21801 283313 0 0 3 0x14200 bored systq 91373 507621 0 0 3 0x40014200 bored softclock 47282 203565 0 0 3 0x40014200 idle0 1 208989 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9535 6506K 6762K 78643K 12477 0 pcb 13 8K 9K 78643K 1132 0 rtable 130 10K 12K 78643K 1113 0 ifaddr 133 28K 28K 78643K 437 0 counters 21 16K 16K 78643K 47 0 ioctlops 0 0K 4K 78643K 230 0 iov 0 0K 20K 78643K 231 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1811 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 166 0 dirhash 9 1K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 1151 0 sigio 0 0K 0K 78643K 17 0 proc 50 38K 63K 78643K 503 0 subproc 23 1K 2K 78643K 38 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 85 0 in_multi 159 6K 6K 78643K 413 0 ether_multi 1 0K 0K 78643K 33 0 mrt 0 0K 0K 78643K 14 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 298 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 168 203K 203K 78643K 4029 0 UVM aobj 95 8K 8K 78643K 106 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 173 0 NDP 15 0K 0K 78643K 74 0 temp 162 3900K 3965K 78643K 60863 0 kqueue 4 6K 24K 78643K 58 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 10 0 3 1 0 1 1 0 8 0 rtpcb 80 100 0 98 1 0 1 1 0 8 0 rtentry 112 119 0 79 2 0 2 2 0 8 0 unpcb 120 431 0 423 1 0 1 1 0 8 0 syncache 264 17 0 17 5 5 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 62 0 62 2 2 0 1 0 8 0 tcpcb 544 1033 0 1028 2 1 1 2 0 8 0 ipq 40 9 0 9 4 3 1 1 0 8 1 ipqe 40 192 0 192 4 3 1 1 0 8 1 inpcb 296 2735 0 2727 4 2 2 3 0 8 1 rttmr 72 4 0 4 2 2 0 1 0 8 0 ip6q 72 4 0 4 2 2 0 1 0 8 0 ip6af 40 12 0 12 2 2 0 1 0 8 0 nd6 48 49 0 47 1 0 1 1 0 8 0 pkpcb 40 18 0 18 4 4 0 1 0 8 0 ppxss 1128 3 0 3 3 3 0 1 0 8 0 pfstscr 40 10 0 5 1 0 1 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 264 0 252 6 5 1 2 0 8 0 pftag 88 36 0 32 3 2 1 1 0 8 0 pfstitem 24 16 0 4 1 0 1 1 0 8 0 pfstkey 112 22 0 10 1 0 1 1 0 8 0 pfstate 328 11 0 5 1 0 1 1 0 8 0 pfrule 1360 72 0 42 3 0 3 3 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 449 0 282 15 3 12 14 0 8 0 art_table 32 451 0 282 2 0 2 2 0 8 0 art_node 16 118 0 82 1 0 1 1 0 8 0 sysvmsgpl 40 46 0 15 1 0 1 1 0 8 0 semapl 112 164 0 154 1 0 1 1 0 8 0 shmpl 112 104 0 12 3 0 3 3 0 8 0 dirhash 1024 17 0 10 3 1 2 3 0 8 0 dino2pl 256 3087 0 1695 88 0 88 88 0 8 0 ffsino 240 3087 0 1695 83 0 83 83 0 8 0 nchpl 144 4945 0 3352 60 0 60 60 0 8 0 uvmvnodes 72 3519 0 0 64 0 64 64 0 8 0 vnodes 208 3519 0 0 186 0 186 186 0 8 0 namei 1024 14023 0 14023 2 1 1 1 0 8 1 vcpupl 1984 20 0 0 3 0 3 3 0 8 0 vmpool 528 23 0 3 2 0 2 2 0 8 0 pfiaddrpl 120 116 0 92 3 2 1 1 0 8 0 scxspl 192 16036 0 16036 1 0 1 1 0 8 1 plimitpl 152 127 0 120 1 0 1 1 0 8 0 sigapl 424 1359 0 1309 6 0 6 6 0 8 0 futexpl 56 26536 0 26535 2 1 1 1 0 8 0 knotepl 112 184 0 164 2 1 1 2 0 8 0 kqueuepl 144 160 0 154 1 0 1 1 0 8 0 pipelkpl 16 198 0 188 1 0 1 1 0 8 0 pipepl 120 396 0 378 1 0 1 1 0 8 0 fdescpl 432 1323 0 1309 2 0 2 2 0 8 0 filepl 120 9421 0 9329 4 0 4 4 0 8 0 lockfpl 104 311 0 310 1 0 1 1 0 8 0 lockfspl 48 116 0 115 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 123 0 113 1 0 1 1 0 8 0 ucredpl 96 897 0 890 1 0 1 1 0 8 0 zombiepl 144 1310 0 1309 1 0 1 1 0 8 0 processpl 920 1359 0 1309 7 0 7 7 0 8 0 procpl 624 3240 0 3181 9 3 6 6 0 8 1 sosppl 128 26 0 26 6 5 1 1 0 8 1 sockpl 400 3302 0 3284 10 7 3 4 0 8 0 mcl64k 65536 358 0 358 33 32 1 29 0 8 1 mcl16k 16384 4 0 4 3 2 1 1 0 8 1 mcl12k 12288 43 0 43 7 6 1 1 0 8 1 mcl9k 9216 18 0 18 8 8 0 1 0 8 0 mcl8k 8192 51 0 51 8 7 1 1 0 8 1 mcl4k 4096 87 0 87 5 4 1 1 0 8 1 mcl2k2 2112 8 0 8 6 6 0 1 0 8 0 mcl2k 2048 76452 0 76400 17 9 8 12 0 8 0 mtagpl 96 157 0 68 5 1 4 4 0 8 0 mbufpl 256 137940 0 137552 93 47 46 57 0 8 0 bufpl 280 6880 0 1528 383 0 383 383 0 8 0 anonpl 16 144492 0 128253 120 49 71 82 0 107 3 amapchunkpl 152 7570 0 7411 45 36 9 16 0 158 2 amappl16 192 6473 0 5561 75 28 47 58 0 8 0 amappl15 184 569 0 567 1 0 1 1 0 8 0 amappl14 176 23 0 19 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 17 0 14 1 0 1 1 0 8 0 amappl11 152 613 0 603 1 0 1 1 0 8 0 amappl10 144 563 0 557 1 0 1 1 0 8 0 amappl9 136 351 0 349 1 0 1 1 0 8 0 amappl8 128 357 0 310 2 0 2 2 0 8 0 amappl7 120 658 0 644 1 0 1 1 0 8 0 amappl6 112 590 0 584 1 0 1 1 0 8 0 amappl5 104 751 0 739 1 0 1 1 0 8 0 amappl4 96 997 0 971 1 0 1 1 0 8 0 amappl3 88 159 0 153 1 0 1 1 0 8 0 amappl2 80 9790 0 9723 2 0 2 2 0 8 0 amappl1 72 33789 0 33375 23 13 10 17 0 8 0 amappl 80 3479 0 3423 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 105 0 11 2 0 2 2 0 8 0 uaddrrnd 24 1346 0 1312 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1346 0 1312 1 0 1 1 0 8 0 vmmpekpl 168 12073 0 12033 2 0 2 2 0 8 0 vmmpepl 168 161436 0 159397 137 42 95 106 0 357 1 vmsppl 272 1345 0 1312 4 1 3 3 0 8 0 pdppl 4096 2698 0 2644 9 1 8 8 0 8 0 pvpl 32 392532 0 373239 256 81 175 196 0 265 13 pmappl 200 1345 0 1312 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 391 0 121 9 0 9 9 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff824249be) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_put(ffffffff82848690,fffffd8052000000) at pool_do_put+0x36a pool_put(ffffffff82848690,fffffd8052000000) at pool_put+0x4b sys/kern/subr_pool.c:794 m_free(fffffd8052000000) at m_free+0x119 sys/kern/uipc_mbuf.c:459 ml_purge(ffff80001d780998) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline] ml_purge(ffff80001d780998) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628 ifq_purge(ffff800000ac4a78) at ifq_purge+0x97 sys/net/ifq.c:462 tun_dev_close(5d01,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460 spec_close(ffff80001d780ac0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805db598f0,7,fffffd806c3bf960,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80576e61f0,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80576e61f0,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa388,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6aa388,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6aa388,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6aa388) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d780f40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d780f40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe3030, count: -19 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff824249be) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_put(ffffffff82848690,fffffd8052000000) at pool_do_put+0x36a pool_put(ffffffff82848690,fffffd8052000000) at pool_put+0x4b sys/kern/subr_pool.c:794 m_free(fffffd8052000000) at m_free+0x119 sys/kern/uipc_mbuf.c:459 ml_purge(ffff80001d780998) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline] ml_purge(ffff80001d780998) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628 ifq_purge(ffff800000ac4a78) at ifq_purge+0x97 sys/net/ifq.c:462 tun_dev_close(5d01,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460 spec_close(ffff80001d780ac0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805db598f0,7,fffffd806c3bf960,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80576e61f0,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80576e61f0,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa388,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6aa388,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6aa388,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6aa388) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d780f40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d780f40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe3030, count: -19