panic: pool_p_free: sockpl free list modified: page 0xfffffd8079538000; item addr 0xfffffd8079538969; offset 0x0=0x6a45d0d8cce13c2 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *343324 72544 0 0x14000 0x200 0 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825f8a91) at panic+0x161 sys/kern/subr_prf.c:198 pool_p_free(ffffffff82ad0bd8,fffffd8079538f90) at pool_p_free+0x1d3 pool_gc_pages(0) at pool_gc_pages+0x215 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff8291f850) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: 10 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 *cpu0: pool_p_free: sockpl free list modified: page 0xfffffd8079538000; item addr 0xfffffd8079538969; offset 0x0=0x6a45d0d8cce13c2 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825f8a91) at panic+0x161 sys/kern/subr_prf.c:198 pool_p_free(ffffffff82ad0bd8,fffffd8079538f90) at pool_p_free+0x1d3 pool_gc_pages(0) at pool_gc_pages+0x215 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff8291f850) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: -5 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800021690a80 rbx 0xa45d0d8cce13c287 rdx 0 rcx 0 rax 0xffff8000ffffe540 r8 0x101010101010101 r9 0x8080808080808080 r10 0x94aec60b72d9d645 r11 0x6d8472918474d399 r12 0 r13 0x6a45d0d8cce13c2 r14 0 r15 0x1 rip 0xffffffff8158adb8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021690a70 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (systqmp) pid=343324 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe000,0xffff8000ffffe7f0 process=0xffff8000ffffcbb8 user=0xffff80002168b000, vmspace=0xffffffff829c8b48 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 32933 430726 13546 0 3 0x82 piperd syz-executor.6 7808 193609 13546 0 3 0x3 kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 6402K 7025K 78643K 21439 0 pcb 13 18K 20K 78643K 890 0 rtable 139 17K 21K 78643K 1912 0 ifaddr 108 26K 31K 78643K 952 0 sysctl 1 1K 2K 78643K 4 0 counters 23 16K 17K 78643K 172 0 ioctlops 0 0K 4K 78643K 3821 0 iov 0 0K 28K 78643K 721 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1390 87K 88K 78643K 4269 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 34 0 VM map 2 0K 0K 78643K 2 0 sem 25 3K 4K 78643K 105 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 10 33K 77K 78643K 5734 0 sigio 0 0K 0K 78643K 186 0 proc 61 59K 83K 78643K 1250 0 subproc 104 6K 6K 78643K 312 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 157 0 in_multi 37 2K 6K 78643K 455 0 ether_multi 1 0K 0K 78643K 23 0 mrt 0 0K 0K 78643K 24 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 163 731K 731K 78643K 163 0 exec 0 0K 1K 78643K 1425 0 pfkey data 0 0K 0K 78643K 7 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 369 603K 618K 78643K 39911 0 UVM aobj 134 4K 4K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 212 0 NDP 9 0K 2K 78643K 154 0 temp 147 4738K 5754K 78643K 61962 0 kqueue 12 18K 40K 78643K 1759 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 rtpcb 120 708 0 705 10 9 1 3 0 8 0 rtentry 112 590 0 545 4 1 3 4 0 8 0 unpcb 144 8156 0 8143 40 39 1 8 0 8 0 syncache 296 69 0 69 16 16 0 1 0 8 0 tcpqe 32 107 0 107 9 9 0 1 0 8 0 tcpcb 768 1931 0 1927 73 72 1 16 0 8 0 arp 88 93 0 85 1 0 1 1 0 8 0 ipq 40 76 0 76 3 3 0 1 0 8 0 ipqe 40 153 0 153 3 3 0 1 0 8 0 inpcb 336 5675 0 5668 85 84 1 18 0 8 0 nd6 48 92 0 82 1 0 1 1 0 8 0 pkpcb 40 15 0 15 3 3 0 1 0 8 0 kcovpl 48 24 0 16 1 0 1 1 0 8 0 mppekey 1024 3 0 3 1 1 0 1 0 8 0 ppxss 1160 92 0 92 10 10 0 1 0 8 0 pppxif 1608 55 0 55 5 5 0 1 0 8 0 pfstscr 40 43 0 40 1 0 1 1 0 8 0 pfrktable 1344 85 0 76 2 1 1 1 0 8 0 pfanchor 1280 866 19 354 47 4 43 43 0 8 0 pftag 88 5 0 0 1 0 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 120 47 0 44 1 0 1 1 0 8 0 pfstate 336 25 0 23 1 0 1 1 0 8 0 pfrule 1360 323 0 276 6 2 4 5 0 8 0 rttmr 136 7 0 7 2 2 0 1 0 8 0 art_heap8 4096 3 0 2 3 2 1 3 0 8 0 art_heap4 256 2241 0 2027 36 12 24 32 0 8 0 art_table 32 2244 0 2029 5 0 5 5 0 8 0 art_node 16 585 0 547 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 18 1 0 1 1 0 8 0 semapl 112 94 0 71 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8943 0 7499 91 0 91 91 0 8 0 ffsino 240 8943 0 7499 86 0 86 86 0 8 0 nchpl 144 16533 0 16038 63 40 23 63 0 8 0 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 61687 0 61687 7 7 0 2 0 8 0 vcpupl 2048 71 0 0 9 0 9 9 0 8 0 vmpool 536 80 0 9 5 0 5 5 0 8 0 pfiaddrpl 120 39 0 20 2 1 1 1 0 8 0 kstatmem 264 196 0 178 4 2 2 3 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 53963 0 53963 15 14 1 8 0 8 1 plimitpl 152 770 0 755 1 0 1 1 0 8 0 sigapl 424 6079 0 6021 8 0 8 8 0 8 0 futexpl 64 57059 0 57059 4 4 0 1 0 8 0 knotepl 120 126568 0 126488 33 29 4 13 0 8 0 kqueuepl 184 2560 0 2552 14 13 1 4 0 8 0 pipepl 288 1196 0 1168 29 26 3 7 0 8 0 fdescpl 432 5982 0 5961 4 0 4 4 0 8 0 filepl 120 43991 0 43758 63 54 9 18 0 8 0 lockfpl 104 1699 0 1697 3 2 1 2 0 8 0 lockfspl 48 565 0 563 1 0 1 1 0 8 0 sessionpl 144 42 0 26 1 0 1 1 0 8 0 pgrppl 48 61 0 45 1 0 1 1 0 8 0 ucredpl 104 4649 0 4639 1 0 1 1 0 8 0 zombiepl 144 6021 0 6021 1 1 0 1 0 8 0 processpl 1000 6079 0 6021 10 1 9 9 0 8 0 procpl 672 16701 0 16625 18 10 8 10 0 8 0 sosppl 168 52 0 52 6 6 0 1 0 8 0 sockpl 456 14554 0 14531 275 272 3 42 0 8 0 mcl64k 65536 265 0 265 12 12 0 1 0 8 0 mcl16k 16384 87 0 87 12 12 0 1 0 8 0 mcl12k 12288 191 0 191 8 8 0 1 0 8 0 mcl9k 9216 77 0 77 12 12 0 1 0 8 0 mcl8k 8192 293 0 293 11 11 0 1 0 8 0 mcl4k 4096 579 0 579 7 7 0 1 0 8 0 mcl2k2 2112 50 0 50 15 15 0 1 0 8 0 mcl2k 2048 92039 0 91897 46 25 21 22 0 8 0 mtagpl 96 1552 0 1281 15 7 8 12 0 8 0 mbufpl 256 216283 0 215814 767 725 42 438 0 8 0 bufpl 288 13128 0 6723 458 0 458 458 0 8 0 anonpl 24 1162626 0 1148258 153 34 119 133 0 188 0 amapchunkpl 152 114252 0 113616 84 56 28 42 0 158 0 amappl16 200 9579 0 8972 68 34 34 47 0 8 0 amappl15 192 2 0 1 1 0 1 1 0 8 0 amappl14 184 210 0 197 2 1 1 2 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 591 0 586 1 0 1 1 0 8 0 amappl11 160 40 0 30 1 0 1 1 0 8 0 amappl10 152 40 0 30 1 0 1 1 0 8 0 amappl9 144 996 0 994 1 0 1 1 0 8 0 amappl8 136 313 0 235 3 0 3 3 0 8 0 amappl7 128 54 0 37 1 0 1 1 0 8 0 amappl6 120 461 0 443 2 1 1 2 0 8 0 amappl5 112 204 0 196 1 0 1 1 0 8 0 amappl4 104 707 0 682 2 1 1 2 0 8 0 amappl3 96 17353 0 17315 2 0 2 2 0 8 0 amappl2 88 6609 0 6546 3 1 2 3 0 8 0 amappl1 80 138343 0 137764 21 5 16 21 0 8 0 amappl 88 39280 0 39092 6 0 6 6 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 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 72 135 0 2 3 0 3 3 0 8 0 uaddrrnd 24 6062 0 5970 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6062 0 5970 1 0 1 1 0 8 0 vmmpekpl 168 49809 0 49733 4 0 4 4 0 8 0 vmmpepl 168 549818 0 547508 238 102 136 149 0 357 0 vmsppl 272 6061 0 5970 8 1 7 7 0 8 0 rwobjpl 24 150056 0 142343 49 0 49 49 0 8 0 pdppl 4096 12130 0 12011 364 230 134 135 0 8 15 pvpl 32 2356225 0 2336940 381 175 206 269 0 265 0 pmappl 216 6061 0 5970 6 0 6 6 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2045 0 1159 40 12 28 38 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:437 panic(ffffffff825f8a91) at panic+0x161 sys/kern/subr_prf.c:198 pool_p_free(ffffffff82ad0bd8,fffffd8079538f90) at pool_p_free+0x1d3 pool_gc_pages(0) at pool_gc_pages+0x215 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff8291f850) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825f8a91) at panic+0x161 sys/kern/subr_prf.c:198 pool_p_free(ffffffff82ad0bd8,fffffd8079538f90) at pool_p_free+0x1d3 pool_gc_pages(0) at pool_gc_pages+0x215 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff8291f850) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: -5