panic: receive 1a: so 0xfffffd806f6e1320, so_type 3, m 0xfffffd806f2c2600, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *242857 77618 0 0 0 1K dhclient 340469 8339 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821e71ed) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6e1320,0,ffff800020ead368,0,0,ffff800020ead274) at soreceive+0x174a sys/kern/uipc_socket.c:977 soo_read(fffffd807b1f4098,ffff800020ead368,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020e6cc38,6,ffff800020ead368,0,ffff800020ead450) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e6cc38,ffff800020ead400,ffff800020ead450) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020ead4d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ead4d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6d20, 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 receive 1a: so 0xfffffd806f6e1320, so_type 3, m 0xfffffd806f2c2600, m_type 0 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821e71ed) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6e1320,0,ffff800020ead368,0,0,ffff800020ead274) at soreceive+0x174a sys/kern/uipc_socket.c:977 soo_read(fffffd807b1f4098,ffff800020ead368,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020e6cc38,6,ffff800020ead368,0,ffff800020ead450) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e6cc38,ffff800020ead400,ffff800020ead450) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020ead4d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ead4d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6d20, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ead0b0 rbx 0xffff800020ead160 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff810fbc8f kprintf+0x16f r9 0x1 r10 0x4a64bb005e3b2cfb r11 0xaccf520412f7070d r12 0x3000000008 r13 0xffff800020ead0c0 r14 0x100 r15 0x1 rip 0xffffffff811ab8d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ead0a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (dhclient) pid=242857 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6c4e8,0xffff800020e6ceb8 process=0xffff800020e80f70 user=0xffff800020ea8000, vmspace=0xfffffd807f000000 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38765 232460 45166 0 3 0x82 thrsleep syz-execprog 38765 157100 45166 0 3 0x4000082 thrsleep syz-execprog 38765 476566 45166 0 3 0x4000082 thrsleep syz-execprog 38765 56796 45166 0 3 0x4000082 thrsleep syz-execprog 38765 309128 45166 0 3 0x4000082 thrsleep syz-execprog 38765 436923 45166 0 3 0x4000082 thrsleep syz-execprog 38765 156283 45166 0 3 0x4000082 kqread syz-execprog 38765 16707 45166 0 3 0x4000082 thrsleep syz-execprog 38765 36683 45166 0 3 0x4000082 wait syz-execprog 45166 96082 59118 0 3 0x10008a pause ksh 59118 172702 18878 0 3 0x92 select sshd 14676 503440 1 0 3 0x100083 ttyin getty 18878 351522 1 0 3 0x80 select sshd 37961 52346 401 74 3 0x100092 bpf pflogd 401 486664 1 0 3 0x80 netio pflogd 4065 352683 54701 73 3 0x100090 kqread syslogd 54701 353395 1 0 3 0x100082 netio syslogd 69164 460582 1 77 3 0x100090 poll dhclient *77618 242857 1 0 7 0 dhclient 6318 347787 0 0 3 0x14200 bored smr 3854 131350 0 0 3 0x14200 pgzero zerothread 29267 64712 0 0 3 0x14200 aiodoned aiodoned 25146 483696 0 0 3 0x14200 syncer update 79784 40463 0 0 3 0x14200 cleaner cleaner 8339 340469 0 0 7 0x14200 reaper 79292 121581 0 0 3 0x14200 pgdaemon pagedaemon 75217 378608 0 0 3 0x14200 bored crynlk 58182 168700 0 0 3 0x14200 bored crypto 74138 3368 0 0 3 0x40014200 acpi0 acpi0 47988 459524 0 0 3 0x40014200 idle1 65281 38365 0 0 3 0x14200 bored softnet 5418 108842 0 0 3 0x14200 bored systqmp 91948 308114 0 0 3 0x14200 bored systq 40013 145590 0 0 3 0x40014200 bored softclock 33087 388211 0 0 3 0x40014200 idle0 1 344997 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807efff750) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_do_remove+0x88 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_do_remove+0x88 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_do_remove+0x88 sys/arch/amd64/amd64/pmap.c:1756 #4 uvm_map_teardown+0x195 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #4 uvm_map_teardown+0x195 sys/uvm/uvm_map.c:2739 #5 uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 #6 uvm_exit+0x29 sys/uvm/uvm_glue.c:297 #7 reaper+0x189 sys/kern/kern_exit.c:456 #8 proc_trampoline+0x1c Process 77618 (dhclient) thread 0xffff800020e6cc38 (242857) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82681848) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x66 sys/kern/uipc_socket2.c:292 #2 soreceive+0x114 sys/kern/uipc_socket.c:731 #3 soo_read+0x53 sys/kern/sys_socket.c:70 #4 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #5 sys_read+0x83 sys/kern/sys_generic.c:157 #6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9462 6393K 6395K 78643K 10557 0 pcb 13 8K 8K 78643K 13 0 rtable 61 2K 2K 78643K 165 0 ifaddr 29 8K 9K 78643K 39 0 counters 39 33K 33K 78643K 41 0 ioctlops 0 0K 4K 78643K 1468 0 mount 1 1K 1K 78643K 1 0 vnodes 1183 74K 75K 78643K 1188 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1823 197K 290K 78643K 12980 0 file desc 1 0K 12K 78643K 18 0 proc 59 63K 83K 78643K 398 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 1K 78643K 22 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 197 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 73 12K 12K 78643K 946 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 7 0 temp 24 3033K 3097K 78643K 1866 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 4 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 12 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 1 0 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 34 0 28 1 0 1 1 0 8 0 nd6 48 3 0 3 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 11 0 0 1 0 1 1 0 8 0 pfstkey 112 11 0 0 1 0 1 1 0 8 0 pfstate 328 11 0 0 1 0 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 144 0 48 9 0 9 9 0 8 3 art_table 32 145 0 48 2 0 2 2 0 8 1 art_node 16 33 0 13 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1424 0 22 88 0 88 88 0 8 0 ffsino 272 1424 0 22 94 0 94 94 0 8 0 nchpl 144 1640 0 38 60 0 60 60 0 8 0 uvmvnodes 72 1434 0 0 27 0 27 27 0 8 0 vnodes 208 1434 0 0 76 0 76 76 0 8 0 namei 1024 4205 0 4205 1 0 1 1 0 8 1 percpumem 16 31 0 1 1 0 1 1 0 8 0 scxspl 192 3828 0 3828 2 1 1 2 0 8 1 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 241 0 213 4 0 4 4 0 8 0 knotepl 112 47 0 38 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 48 77 0 71 1 0 1 1 0 8 0 pipepl 120 154 0 145 1 0 1 1 0 8 0 fdescpl 496 226 0 213 3 0 3 3 0 8 0 filepl 152 1110 0 1057 3 0 3 3 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 62 0 53 1 0 1 1 0 8 0 zombiepl 144 213 0 212 1 0 1 1 0 8 0 processpl 984 241 0 212 5 0 5 5 0 8 1 procpl 624 249 0 212 4 0 4 4 0 8 1 sockpl 400 80 0 62 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 80 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 133 0 0 8 0 8 8 0 8 0 bufpl 280 2982 0 133 204 0 204 204 0 8 0 anonpl 16 22262 0 20635 13 1 12 12 0 124 3 amapchunkpl 152 819 0 754 4 0 4 4 0 158 1 amappl16 192 137 0 111 2 0 2 2 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 41 0 33 1 0 1 1 0 8 0 amappl13 168 20 0 19 1 0 1 1 0 8 0 amappl12 160 12 0 9 1 0 1 1 0 8 0 amappl11 152 51 0 36 1 0 1 1 0 8 0 amappl10 144 21 0 17 1 0 1 1 0 8 0 amappl9 136 235 0 232 1 0 1 1 0 8 0 amappl8 128 275 0 265 1 0 1 1 0 8 0 amappl7 120 116 0 105 1 0 1 1 0 8 0 amappl6 112 22 0 20 1 0 1 1 0 8 0 amappl5 104 126 0 113 1 0 1 1 0 8 0 amappl4 96 495 0 468 1 0 1 1 0 8 0 amappl3 88 106 0 100 1 0 1 1 0 8 0 amappl2 80 922 0 863 2 0 2 2 0 8 0 amappl1 72 15246 0 14829 23 5 18 18 0 8 8 amappl 80 476 0 448 1 0 1 1 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 226 0 213 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 226 0 213 1 0 1 1 0 8 0 vmmpekpl 168 6338 0 6310 2 0 2 2 0 8 0 vmmpepl 168 32448 0 31545 76 4 72 72 0 357 29 vmsppl 368 225 0 212 2 0 2 2 0 8 0 pdppl 4096 460 0 424 6 0 6 6 0 8 0 pvpl 32 113389 0 109487 104 0 104 104 0 265 69 pmappl 232 225 0 212 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 234 0 3 7 0 7 7 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff824a9ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82681640) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82681640) at __mp_lock+0x127 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800020e5ef30,1) at uvm_unmap_detach+0xe7 sys/uvm/uvm_map.c:1581 uvm_map_teardown(fffffd807f000730) at uvm_map_teardown+0x25c sys/uvm/uvm_map.c:2757 uvmspace_free(fffffd807f000730) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 uvm_exit(ffff800020e807c0) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297 reaper(ffff800020e19ad0) at reaper+0x189 sys/kern/kern_exit.c:456 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff824a9ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82681640) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82681640) at __mp_lock+0x127 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800020e5ef30,1) at uvm_unmap_detach+0xe7 sys/uvm/uvm_map.c:1581 uvm_map_teardown(fffffd807f000730) at uvm_map_teardown+0x25c sys/uvm/uvm_map.c:2757 uvmspace_free(fffffd807f000730) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 uvm_exit(ffff800020e807c0) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297 reaper(ffff800020e19ad0) at reaper+0x189 sys/kern/kern_exit.c:456 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821e71ed) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6e1320,0,ffff800020ead368,0,0,ffff800020ead274) at soreceive+0x174a sys/kern/uipc_socket.c:977 soo_read(fffffd807b1f4098,ffff800020ead368,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020e6cc38,6,ffff800020ead368,0,ffff800020ead450) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e6cc38,ffff800020ead400,ffff800020ead450) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020ead4d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ead4d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6d20, count: 7 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821e71ed) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6e1320,0,ffff800020ead368,0,0,ffff800020ead274) at soreceive+0x174a sys/kern/uipc_socket.c:977 soo_read(fffffd807b1f4098,ffff800020ead368,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020e6cc38,6,ffff800020ead368,0,ffff800020ead450) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e6cc38,ffff800020ead400,ffff800020ead450) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020ead4d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ead4d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6d20, count: -8 ddb{1}>