login: panic: receive 1a: so 0xfffffd806f6e5640, so_type 3, m 0xfffffd806f17ea00, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 107199 44934 0 0x2 0x4000000 0 syz-fuzzer *127805 28072 0 0 0 1K dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821c0db8) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6e5640,0,ffff800020abcfe8,0,0,ffff800020abcef4) at soreceive+0x174a sys/kern/uipc_socket.c:977 soo_read(fffffd807a7fb2f8,ffff800020abcfe8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a7c4e8,6,ffff800020abcfe8,0,ffff800020abd0d0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:236 sys_read(ffff800020a7c4e8,ffff800020abd080,ffff800020abd0d0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020abd150) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020abd150) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda750, 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 0xfffffd806f6e5640, so_type 3, m 0xfffffd806f17ea00, m_type 0 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821c0db8) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6e5640,0,ffff800020abcfe8,0,0,ffff800020abcef4) at soreceive+0x174a sys/kern/uipc_socket.c:977 soo_read(fffffd807a7fb2f8,ffff800020abcfe8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a7c4e8,6,ffff800020abcfe8,0,ffff800020abd0d0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:236 sys_read(ffff800020a7c4e8,ffff800020abd080,ffff800020abd0d0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020abd150) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020abd150) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda750, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020abcd30 rbx 0xffff800020abcde0 rdx 0xffff800020a7c4e8 rcx 0 rax 0 r8 0xffffffff81b395df kprintf+0x16f r9 0x1 r10 0x25 r11 0x6a2f28eff33e8f5 r12 0x3000000008 r13 0xffff800020abcd40 r14 0x100 r15 0x1 rip 0xffffffff8177a798 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020abcd20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (dhclient) pid=127805 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a7d118,0xffff800020a7c768 process=0xffff800020a90b50 user=0xffff800020ab8000, vmspace=0xfffffd807efff2e0 estcpu=0, cpticks=1, pctcpu=0.1 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56362 139951 98611 0 2 0 syz-executor.1 56362 181635 98611 0 3 0x4000080 fsleep syz-executor.1 84357 244672 0 0 3 0x14200 acct acct 98611 341097 44934 0 3 0x82 nanosleep syz-executor.1 3148 234838 44934 0 3 0x2 biowait syz-executor.0 44934 103459 70688 0 3 0x82 thrsleep syz-fuzzer 44934 132452 70688 0 3 0x4000082 nanosleep syz-fuzzer 44934 23277 70688 0 3 0x4000082 thrsleep syz-fuzzer 44934 180589 70688 0 3 0x4000082 kqread syz-fuzzer 44934 107199 70688 0 7 0x4000002 syz-fuzzer 44934 1927 70688 0 3 0x4000082 thrsleep syz-fuzzer 44934 268128 70688 0 3 0x4000082 thrsleep syz-fuzzer 44934 495357 70688 0 3 0x4000082 thrsleep syz-fuzzer 44934 492049 70688 0 3 0x4000082 thrsleep syz-fuzzer 44934 134822 70688 0 3 0x4000082 thrsleep syz-fuzzer 70688 29952 27888 0 3 0x10008a pause ksh 27888 414276 26240 0 3 0x92 select sshd 95349 55307 1 0 3 0x100083 ttyin getty 26240 130649 1 0 3 0x80 select sshd 9785 163041 60906 74 3 0x100092 bpf pflogd 60906 386131 1 0 3 0x80 netio pflogd 60681 246051 37293 73 3 0x100090 kqread syslogd 37293 402511 1 0 3 0x100082 netio syslogd 81693 117770 1 77 3 0x100090 poll dhclient *28072 127805 1 0 7 0 dhclient 60395 465767 0 0 3 0x14200 pgzero zerothread 42816 443441 0 0 3 0x14200 aiodoned aiodoned 77331 187003 0 0 3 0x14200 syncer update 98505 189286 0 0 3 0x14200 cleaner cleaner 23550 295665 0 0 3 0x14200 reaper reaper 96121 423405 0 0 3 0x14200 pgdaemon pagedaemon 39678 12739 0 0 3 0x14200 bored crynlk 83786 246523 0 0 3 0x14200 bored crypto 7266 386104 0 0 3 0x40014200 acpi0 acpi0 66495 86033 0 0 3 0x40014200 idle1 73494 361898 0 0 3 0x14200 bored softnet 16341 170178 0 0 3 0x14200 bored systqmp 44318 488579 0 0 3 0x14200 bored systq 85411 518551 0 0 3 0x40014200 bored softclock 42711 432975 0 0 3 0x40014200 idle0 24585 274529 0 0 3 0x14200 bored smr 1 186001 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 3148 (syz-executor.0) thread 0xffff800020a7dd48 (234838) exclusive rrwlock inode r = 0 (0xfffffd8066535f80) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1860 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b45a098) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1860 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 28072 (dhclient) thread 0xffff800020a7c4e8 (127805) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8264b5f8) #0 witness_lock+0x52e 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:236 #5 sys_read+0x83 sys/kern/sys_generic.c:156 #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 9492 6594K 6594K 78643K 10603 0 pcb 13 8K 8K 78643K 28 0 rtable 105 3K 3K 78643K 205 0 ifaddr 49 11K 11K 78643K 52 0 counters 45 34K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1471 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1232 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 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 45 0 proc 59 63K 95K 78643K 438 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 33 2K 2K 78643K 33 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 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 207 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 105 21K 22K 78643K 1063 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 4 0 NDP 7 0K 0K 78643K 11 0 temp 76 3009K 3073K 78643K 2120 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 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 45 0 35 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 348 0 348 1 0 1 1 0 8 1 tcpcb 544 14 0 10 1 0 1 1 0 8 0 inpcb 280 57 0 50 2 0 2 2 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 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 12 0 0 1 0 1 1 0 8 0 pfstkey 112 12 0 0 1 0 1 1 0 8 0 pfstate 328 12 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 256 213 0 0 14 0 14 14 0 8 0 art_table 32 214 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1449 0 39 46 0 46 46 0 8 0 ffsino 272 1449 0 39 95 0 95 95 0 8 0 nchpl 144 1699 0 81 61 0 61 61 0 8 0 uvmvnodes 72 1502 0 0 28 0 28 28 0 8 0 vnodes 208 1502 0 0 80 0 80 80 0 8 0 namei 1024 4403 0 4403 1 0 1 1 0 8 1 percpumem 16 33 0 0 1 0 1 1 0 8 0 scxspl 192 5088 0 5087 8 1 7 7 0 8 6 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 432 244 0 229 3 0 3 3 0 8 1 futexpl 56 308 0 307 1 0 1 1 0 8 0 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 104 8 0 6 1 0 1 1 0 8 0 pipelkpl 48 82 0 72 1 0 1 1 0 8 0 pipepl 120 164 0 145 1 0 1 1 0 8 0 fdescpl 496 245 0 229 3 0 3 3 0 8 0 filepl 152 1329 0 1228 6 0 6 6 0 8 1 lockfpl 104 14 0 12 1 0 1 1 0 8 0 lockfspl 48 7 0 5 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 69 0 60 1 0 1 1 0 8 0 zombiepl 144 229 0 229 1 0 1 1 0 8 1 processpl 960 261 0 229 5 0 5 5 0 8 0 procpl 624 300 0 258 4 0 4 4 0 8 0 sockpl 400 125 0 106 4 0 4 4 0 8 2 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 168 0 0 20 0 20 20 0 8 0 mtagpl 80 3 0 0 1 0 1 1 0 8 0 mbufpl 256 195 0 0 12 0 12 12 0 8 0 bufpl 280 4137 0 193 282 0 282 282 0 8 0 anonpl 16 38526 0 23090 64 1 63 63 0 125 0 amapchunkpl 152 1223 0 1085 8 0 8 8 0 158 1 amappl16 192 963 0 129 43 1 42 42 0 8 0 amappl15 184 69 0 63 1 0 1 1 0 8 0 amappl14 176 31 0 28 1 0 1 1 0 8 0 amappl12 160 10 0 8 2 1 1 1 0 8 0 amappl11 152 57 0 42 1 0 1 1 0 8 0 amappl10 144 13 0 7 1 0 1 1 0 8 0 amappl9 136 599 0 596 1 0 1 1 0 8 0 amappl8 128 121 0 99 1 0 1 1 0 8 0 amappl7 120 103 0 91 1 0 1 1 0 8 0 amappl6 112 62 0 54 1 0 1 1 0 8 0 amappl5 104 140 0 125 1 0 1 1 0 8 0 amappl4 96 495 0 465 1 0 1 1 0 8 0 amappl3 88 119 0 110 1 0 1 1 0 8 0 amappl2 80 1062 0 986 3 1 2 3 0 8 0 amappl1 72 15592 0 15137 25 8 17 21 0 8 6 amappl 80 549 0 505 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 245 0 229 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 245 0 229 1 0 1 1 0 8 0 vmmpekpl 168 5930 0 5896 2 0 2 2 0 8 0 vmmpepl 168 37575 0 35562 120 2 118 118 0 357 26 vmsppl 368 244 0 229 2 0 2 2 0 8 0 pdppl 4096 497 0 458 6 0 6 6 0 8 0 pvpl 32 133020 0 114456 155 0 155 155 0 265 4 pmappl 232 244 0 229 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 168 0 3 5 0 5 5 0 8 0