panic: kernel diagnostic assertion "(TAILQ_NEXT(inp, inp_queue) == NULL) || (TAILQ_NEXT(inp, inp_queue) == _Q_INVALID)" failed: file "/syzkaller/managers/main/kernel/sys/netinet/in_pcb.c", line 673 Starting stack trace... panic(ffffffff8342cfde) at panic+0x1ba sys/kern/subr_prf.c:229 __assert(ffffffff833df4e4,ffffffff833caf1a,2a1,ffffffff833a396f) at __assert+0x29 sys/kern/subr_prf.c:-1 in_pcbunref(fffffd80715647b0) at in_pcbunref+0x206 sys/netinet/in_pcb.c:672 tcp_input_solocked(ffff80002a74b640,ffff80002a74b64c,0,2,ffff80002a74b638) at tcp_input_solocked+0xfd sys/netinet/tcp_input.c:2229 tcp_input_mlist(ffffffff838ebd20,2) at tcp_input_mlist+0x93 sys/netinet/tcp_input.c:-1 if_input_process(ffff800000b11800,ffff80002a74b718,0) at if_input_process+0x229 sys/net/if.c:1015 ifiq_process(ffff800000b11c18) at ifiq_process+0xcd sys/net/ifq.c:874 taskq_thread(ffff80000002c000) at taskq_thread+0xd4 sys/kern/kern_task.c:446 end trace frame: 0x0, count: 249 End of stack trace. syncing disks...40 37 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 giving up OpenBSD/amd64 (Amnesiac) (tty00) login: WARNING: SPL NOT LOWERED ON SYSCALL 3 3 EXIT 0 3 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *113070 78167 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x72adb68f8c80, 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> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 11142K 11933K 166960K 15800 0 pcb 17 16K 17K 166960K 560 0 rtable 192 8K 9K 166960K 917 0 pf 29 12K 21K 166960K 189 0 ifaddr 35 6K 8K 166960K 146 0 ifgroup 46 2K 2K 166960K 240 0 sysctl 4 1K 9K 166960K 17 0 counters 31 17K 18K 166960K 129 0 ioctlops 0 0K 4K 166960K 465 0 iov 0 0K 16K 166960K 313 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1471 92K 93K 166960K 3811 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 236 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 2355 0 sigio 0 0K 0K 166960K 29 0 proc 60 59K 124K 166960K 870 0 subproc 72 4K 4K 166960K 137 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 318 0 in_multi 76 5K 7K 166960K 255 0 ether_multi 1 0K 0K 166960K 16 0 mrt 0 0K 0K 166960K 23 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 2K 166960K 886 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 152K 180K 166960K 21518 0 UVM aobj 131 8K 8K 166960K 133 0 pinsyscall 38 76K 96K 166960K 3582 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 132 0 NDP 10 0K 2K 166960K 103 0 temp 77 8688K 8931K 166960K 111582 0 kqueue 16 26K 32K 166960K 361 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 178 0 175 1 0 1 1 0 8 0 rtentry 136 296 0 215 4 0 4 4 0 8 0 unpcb 144 1601 0 1583 9 3 6 6 0 8 5 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 736 613 0 602 8 1 7 7 0 8 5 arp 88 33 0 20 1 0 1 1 0 8 0 ipq 40 7 0 2 1 0 1 1 0 8 0 ipqe 40 9 0 4 1 0 1 1 0 8 0 inpcb 328 2659 0 2642 16 6 10 10 0 8 8 ip6q 72 5 0 3 1 0 1 1 0 8 0 ip6af 40 9 0 6 2 1 1 1 0 8 0 nd6 104 55 0 35 1 0 1 1 0 8 0 pkpcb 40 122 0 122 2 1 1 1 0 8 1 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1072 71 0 71 2 1 1 1 0 8 1 pppxif 1384 13 0 13 2 1 1 1 0 8 1 pfrule 1344 1 0 1 1 1 0 1 0 8 0 rttmr 136 5 0 5 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1186 0 805 32 3 29 29 0 8 5 art_table 32 1189 0 805 4 0 4 4 0 8 0 art_node 16 224 0 153 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 5 1 0 1 1 0 8 0 semupl 112 3 0 3 2 1 1 1 0 8 1 semapl 112 232 0 222 1 0 1 1 0 8 0 shmpl 112 130 0 2 4 0 4 4 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 5510 0 4000 95 0 95 95 0 8 0 ffsino 248 5510 0 4000 95 0 95 95 0 8 0 nchpl 144 8721 0 8118 63 33 30 63 0 8 7 rtmask 32 10 0 10 2 1 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 31140 0 31139 2 1 1 2 0 8 0 kstatmem 264 140 0 120 2 0 2 2 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 26045 0 26043 10 2 8 8 1 8 7 plimitpl 152 570 0 554 1 0 1 1 0 8 0 sigapl 424 2649 0 2603 9 1 8 8 0 8 1 knotepl 120 679333 0 679041 57 34 23 23 0 8 13 kqueuepl 184 657 0 643 4 2 2 3 0 8 1 pipepl 296 352 0 325 5 0 5 5 0 8 2 fdescpl 440 2607 0 2578 5 1 4 5 0 8 0 filepl 120 17319 0 17097 20 7 13 15 0 8 5 lockfpl 104 1468 0 1466 1 0 1 1 0 8 0 lockfspl 48 610 0 608 1 0 1 1 0 8 0 sessionpl 144 33 0 25 1 0 1 1 0 8 0 pgrppl 48 71 0 55 1 0 1 1 0 8 0 ucredpl 104 2977 0 2964 1 0 1 1 0 8 0 zombiepl 144 2603 0 2603 2 1 1 1 0 8 1 processpl 1160 2649 0 2603 5 0 5 5 0 8 0 procpl 656 5575 0 5516 9 1 8 8 0 8 0 sosppl 168 16 0 16 2 1 1 1 0 8 1 sockpl 528 4628 0 4588 19 8 11 14 0 8 8 mcl64k 65536 54 0 54 2 1 1 1 0 8 1 mcl16k 16384 39 0 39 2 1 1 1 0 8 1 mcl12k 12288 7 0 7 2 1 1 1 0 8 1 mcl9k 9216 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 45 0 44 2 1 1 1 0 8 0 mcl4k 4096 5473 0 5415 15 6 9 13 0 8 1 mcl2k2 2112 37 0 37 2 1 1 1 0 8 1 mcl2k 2048 2480 0 2473 6 3 3 4 0 8 1 mtagpl 96 269 0 146 5 0 5 5 0 8 1 mbufpl 256 28386 0 28129 37 7 30 32 0 8 8 bufpl 280 6371 0 144 445 0 445 445 0 8 0 anonpl 24 353179 0 341752 100 4 96 96 0 187 0 amapchunkpl 152 74051 0 73459 44 9 35 35 0 158 10 amappl16 200 7759 0 7318 42 5 37 37 0 8 0 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 127 0 117 1 0 1 1 0 8 0 amappl13 176 9 0 9 2 1 1 1 0 8 1 amappl12 168 3322 0 3293 3 1 2 3 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 118 0 107 1 0 1 1 0 8 0 amappl6 120 241 0 237 1 0 1 1 0 8 0 amappl5 112 144 0 137 1 0 1 1 0 8 0 amappl4 104 314 0 297 1 0 1 1 0 8 0 amappl3 96 15175 0 15065 5 1 4 4 0 8 0 amappl2 88 737 0 679 2 0 2 2 0 8 0 amappl1 80 17741 0 17194 14 1 13 13 0 8 0 amappl 88 20304 0 20127 5 0 5 5 0 92 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 39 0 39 2 1 1 1 0 8 1 dma128 128 260 0 260 2 1 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 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 72 132 0 2 3 0 3 3 0 8 0 uaddrrnd 24 2607 0 2578 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2607 0 2578 1 0 1 1 0 8 0 vmmpekpl 168 17524 0 17463 3 0 3 3 0 8 0 vmmpepl 168 165136 0 162839 122 2 120 120 0 357 6 vmsppl 360 2606 0 2578 4 1 3 4 0 8 0 rwobjpl 32 45434 0 38102 62 0 62 62 0 8 0 pdppl 4096 5220 0 5156 114 48 66 82 0 8 2 pvpl 32 1085909 0 1068696 212 16 196 196 0 265 19 pmappl 216 2606 0 2578 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 327 0 75 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x72adb68f8c80, count: -1 ddb> machine ddbcpu 1 No such command ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x72adb68f8c80, count: -1