panic: pool_p_free: rttmr free list modified: page 0xfffffd805f0fb000; item addr 0xfffffd805f0fbde8; offset 0x10=0x838c32d0 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 215404 18330 0 0 0 1 syz-executor * 15932 18532 0 0x14000 0x200 0 systqmp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83369c5b) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff8393ae70,fffffd805f0fbf90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1587 taskq_thread(ffffffff83868430) at taskq_thread+0x157 sys/kern/kern_task.c:446 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: pool_p_free: rttmr free list modified: page 0xfffffd805f0fb000; item addr 0xfffffd805f0fbde8; offset 0x10=0x838c32d0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83369c5b) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff8393ae70,fffffd805f0fbf90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1587 taskq_thread(ffffffff83868430) at taskq_thread+0x157 sys/kern/kern_task.c:446 end trace frame: 0x0, count: -5 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a21a260 rbx 0xffffffff8380fddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff8000ffffe7c8 rax 0xffffffff8380eff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x53ec6454f5594ba5 r11 0xf312594f171e0a16 r12 0xffffffff8380fbe0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff8272e245 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a21a250 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (systqmp) tid=15932 pid=18532 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=51, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffef90,0xffff8000ffffe540 process=0xffff8000ffff9380 user=0xffff80002a215000, vmspace=0xffffffff838b4360 estcpu=1, cpticks=4, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 21736 321743 20547 0 3 0 vmmaplk syz-executor 21736 138517 20547 0 3 0x4000080 fsleep syz-executor 21736 82024 20547 0 2 0x4000000 syz-executor 50400 16769 18369 0 2 0 syz-executor 50400 371715 18369 0 3 0x4000080 piperd syz-executor 18330 215404 2320 0 7 0 syz-executor 18330 291335 2320 0 3 0x4000080 netcon syz-executor 18330 2657 2320 0 3 0x4000080 fsleep syz-executor 18822 433991 20838 -1 2 0x10 syz-executor 18822 358325 20838 -1 3 0x4000090 netcon syz-executor 18822 11595 20838 -1 3 0x4000090 fsleep syz-executor 63300 329840 53744 0 3 0x82 piperd syz-executor 54434 42845 93605 0 3 0x3000 suspend syz-executor 54434 115631 93605 0 3 0x4081000 biowait syz-executor 60357 112214 53744 0 3 0x82 piperd syz-executor 20547 59980 53744 0 3 0x82 nanoslp syz-executor 34456 41953 1 0 3 0x100083 ttyin getty 18369 250439 53744 0 3 0x82 nanoslp syz-executor 2320 491748 53744 0 2 0x3 syz-executor 3543 18392 53744 0 3 0x82 wait syz-executor 93605 428719 53744 0 3 0x82 wait syz-executor 27282 38072 0 0 3 0x14200 bored sosplice 20838 475895 53744 0 3 0x82 nanoslp syz-executor 53744 223453 39789 0 2 0x3 syz-executor 39789 386759 60688 0 3 0x10008a sigsusp ksh 60688 66833 58063 0 3 0x98 kqread sshd-session 58063 383890 4238 0 3 0x92 kqread sshd-session 4238 361271 1 0 3 0x88 kqread sshd 64332 404096 64234 74 3 0x1100092 bpf pflogd 64234 428731 1 0 3 0x80 sbwait pflogd 55886 412014 66228 73 3 0x1100090 kqread syslogd 66228 113843 1 0 3 0x100082 sbwait syslogd 24513 269985 1 0 3 0x100080 kqread resolvd 55055 167990 0 0 3 0x14200 bored smr 59601 95236 0 0 3 0x14200 pgzero zerothread 65117 372953 0 0 3 0x14200 aiodoned aiodoned 36209 448244 0 0 2 0x14e00 update 70663 352085 0 0 3 0x14200 cleaner cleaner 85700 452052 0 0 3 0x14200 reaper reaper 56907 382423 0 0 3 0x14200 pgdaemon pagedaemon 63152 312717 0 0 3 0x14200 bored viomb 87117 454522 0 0 3 0x40014200 acpi0 acpi0 65461 180442 0 0 3 0x40014200 idle1 23467 182413 0 0 3 0x14200 bored softnet7 18316 217320 0 0 3 0x14200 bored softnet6 79347 115870 0 0 3 0x14200 bored softnet5 44778 219112 0 0 3 0x14200 bored softnet4 95109 261177 0 0 3 0x14200 bored softnet3 74812 491475 0 0 3 0x14200 bored softnet2 72254 230854 0 0 3 0x14200 bored softnet1 97266 341336 0 0 3 0x14200 bored softnet0 *18532 15932 0 0 7 0x14200 systqmp 41374 33745 0 0 3 0x14200 bored systq 47015 202886 0 0 3 0x14200 tmoslp softclockmp 74189 454272 0 0 3 0x40014200 tmoslp softclock 71796 110543 0 0 3 0x40014200 idle0 1 509318 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 21736 (syz-executor) thread 0xffff800031009ca8 (82024) Process 54434 (syz-executor) thread 0xffff800031009778 (115631) Process 18532 (systqmp) thread 0xffff8000ffffe7c8 (15932) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10249 11058K 11740K 166960K 13903 0 pcb 19 15K 31K 166960K 1004 0 rtable 222 14K 15K 166960K 1086 0 pf 43 19K 84K 166960K 420 0 ifaddr 40 8K 9K 166960K 276 0 ifgroup 59 2K 2K 166960K 434 0 sysctl 4 1K 9K 166960K 35 0 counters 70 37K 38K 166960K 434 0 ioctlops 0 0K 4K 166960K 2261 0 iov 0 0K 48K 166960K 205 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1477 93K 94K 166960K 4238 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 54 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 215 0 dirhash 12 2K 3K 166960K 90 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 3966 0 sigio 0 0K 0K 166960K 109 0 proc 66 83K 180K 166960K 1339 0 subproc 72 4K 4K 166960K 198 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 464 0 in_multi 77 5K 7K 166960K 384 0 ether_multi 1 0K 0K 166960K 32 0 mrt 1 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 1403 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 214 126K 188K 166960K 38322 0 UVM aobj 131 6K 6K 166960K 134 0 pinsyscall 35 70K 98K 166960K 5489 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 303 0 NDP 15 0K 2K 166960K 186 0 temp 90 8652K 8910K 166960K 217825 0 kqueue 9 15K 31K 166960K 711 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 489 0 487 4 2 2 2 0 8 1 rtentry 176 388 0 312 5 1 4 5 0 8 0 unpcb 144 2614 0 2601 12 10 2 5 0 8 1 syncache 336 27 0 27 9 9 0 1 0 8 0 tcpqe 32 8 0 8 4 4 0 1 0 8 0 tcpcb 736 1603 0 1591 39 37 2 7 0 8 0 arp 128 35 0 26 1 0 1 1 0 8 0 inpcb 328 4435 0 4420 49 42 7 13 0 8 4 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 144 61 0 44 1 0 1 1 0 8 0 pkpcb 40 28 0 28 11 11 0 1 0 8 0 kcovpl 48 22 0 14 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 138 0 138 4 3 1 1 0 8 1 pppxif 1504 6 0 6 3 3 0 1 0 8 0 pfstscr 40 6 0 5 1 0 1 1 0 8 0 pffrag 232 29 0 23 1 0 1 1 0 482 0 pffrnode 88 25 0 21 1 0 1 1 0 8 0 pffrent 40 143 0 137 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 2 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 252 0 181 1 0 1 1 0 8 0 pfstkey 128 259 0 190 4 0 4 4 0 8 0 pfstate 384 254 0 185 13 1 12 12 0 8 0 pfrule 1344 37 0 30 2 1 1 2 0 8 0 rttmr 136 6 0 6 4 4 0 1 0 8 0 art_heap8 4096 6 0 2 6 2 4 6 0 8 0 art_heap4 256 1458 0 1085 44 18 26 28 0 8 0 art_table 40 1464 0 1087 6 1 5 5 0 8 0 art_node 32 383 0 317 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 8 1 0 1 1 0 8 0 semapl 112 208 0 198 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 69 0 52 3 0 3 3 0 8 0 dino2pl 256 8488 0 6952 97 0 97 97 0 8 0 ffsino 296 8488 0 6952 119 0 119 119 0 8 0 nchpl 144 14249 0 13679 64 39 25 64 0 8 0 rtmask 32 32 0 32 8 7 1 1 0 8 1 uvmvnodes 80 10058 0 0 206 0 206 206 0 8 0 vnodes 216 10058 0 0 559 0 559 559 0 8 0 namei 1024 51467 0 51467 7 6 1 2 0 8 1 percpumem 16 232 0 182 1 0 1 1 0 8 0 kstatmem 264 288 0 256 7 4 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 20 0 20 13 12 1 1 0 8 1 scxspl 216 82831 0 82830 21 19 2 8 1 8 1 plimitpl 152 1158 0 1141 1 0 1 1 0 8 0 sigapl 424 4320 0 4270 15 5 10 14 0 8 0 knotepl 120 684 0 0 18 0 18 18 0 8 0 kqueuepl 224 1635 0 1627 24 15 9 9 0 8 8 pipepl 344 822 0 794 29 20 9 9 0 8 6 fdescpl 528 4201 0 4174 3 0 3 3 0 8 0 filepl 160 30781 0 30567 45 25 20 20 0 8 8 lockfpl 104 1999 0 1998 2 1 1 2 0 8 0 lockfspl 48 674 0 673 1 0 1 1 0 8 0 sessionpl 144 56 0 48 1 0 1 1 0 8 0 pgrppl 48 114 0 98 1 0 1 1 0 8 0 ucredpl 104 5828 0 5816 1 0 1 1 0 8 0 zombiepl 144 5903 0 5901 1 0 1 1 0 8 0 processpl 1248 4320 0 4270 11 4 7 10 0 8 0 procpl 664 10674 0 10616 15 7 8 12 0 8 0 sosppl 168 32 0 32 7 6 1 1 0 8 1 sockpl 752 7815 0 7785 78 68 10 28 0 8 5 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 124 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 61 0 0 5 0 5 5 0 8 0 mtagpl 96 12 0 0 1 0 1 1 0 8 0 mbufpl 256 739 0 0 41 0 41 41 0 8 0 bufpl 280 31697 0 25554 440 0 440 440 0 8 0 anonpl 32 16735 0 0 136 1 135 135 0 246 0 amapchunkpl 152 132444 0 131904 88 54 34 38 0 158 6 amappl16 200 13353 0 12969 91 64 27 39 0 8 4 amappl15 192 8 0 8 4 4 0 1 0 8 0 amappl14 184 180 0 171 1 0 1 1 0 8 0 amappl13 176 4 0 4 2 2 0 1 0 8 0 amappl12 168 5098 0 5071 3 1 2 2 0 8 0 amappl11 160 50 0 42 1 0 1 1 0 8 0 amappl10 152 14 0 13 1 0 1 1 0 8 0 amappl9 144 254 0 253 2 1 1 1 0 8 0 amappl8 136 34 0 31 1 0 1 1 0 8 0 amappl7 128 195 0 185 1 0 1 1 0 8 0 amappl6 120 355 0 351 1 0 1 1 0 8 0 amappl5 112 181 0 174 1 0 1 1 0 8 0 amappl4 104 398 0 379 1 0 1 1 0 8 0 amappl3 96 26731 0 26635 4 0 4 4 0 8 0 amappl2 88 1008 0 959 2 0 2 2 0 8 0 amappl1 80 28634 0 28131 17 2 15 16 0 8 0 amappl 88 36615 0 36455 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 9 0 9 4 3 1 1 0 8 1 dma128 128 260 0 260 7 7 0 1 0 8 0 dma64 64 72 0 72 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 4202 0 4175 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4202 0 4175 1 0 1 1 0 8 0 vmmpekpl 168 33628 0 33562 6 1 5 6 0 8 0 vmmpepl 168 271629 0 269609 141 36 105 127 0 357 0 vmsppl 488 4201 0 4175 5 0 5 5 0 8 0 rwobjpl 80 79639 0 68301 235 2 233 233 0 8 0 pdppl 4096 8411 0 8350 153 86 67 81 0 8 6 pvpl 32 24907 0 0 200 0 200 200 0 265 0 pmappl 256 4201 0 4175 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 436 0 164 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83369c5b) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff8393ae70,fffffd805f0fbf90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1587 taskq_thread(ffffffff83868430) at taskq_thread+0x157 sys/kern/kern_task.c:446 end trace frame: 0x0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x75d6f95091b0, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x75d6f95091b0, count: -3