panic: pool_p_free: rttmr free list modified: page 0xfffffd8077fa4000; item addr 0xfffffd8077fa4dd0; offset 0x10=0x8397bc90 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *268613 49687 0 0x14000 0x200 0 systqmp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d198d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff839cef08,fffffd8077fa4f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:-1 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1584 taskq_thread(ffffffff83854d90) 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 0xfffffd8077fa4000; item addr 0xfffffd8077fa4dd0; offset 0x10=0x8397bc90 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d198d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff839cef08,fffffd8077fa4f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:-1 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1584 taskq_thread(ffffffff83854d90) 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 0xffff80002a20abe0 rbx 0xffffffff838c0dd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff8000ffffea40 rax 0xffffffff838bfff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd76cf5619fed10a7 r11 0xf2527cc248ed9bc4 r12 0xffffffff838c0bd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff814c7145 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a20abd0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (systqmp) tid=268613 pid=49687 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffe520,0xffff8000ffffece0 process=0xffff8000ffff84d8 user=0xffff80002a205000, vmspace=0xffffffff83a0b238 estcpu=0, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 2084 437547 10084 0 2 0 syz-executor 2084 278931 10084 0 2 0x4000000 syz-executor 38578 405022 14774 0 2 0 syz-executor 55296 385265 24053 0 2 0 syz-executor 55296 164913 24053 0 3 0x4000080 fsleep syz-executor 99500 63912 96104 0 2 0 syz-executor 99500 266090 96104 0 3 0x4000080 ttyin syz-executor 99500 469496 96104 0 2 0x4000000 syz-executor 99500 250737 96104 0 2 0x4000000 syz-executor 52936 412831 13825 0 2 0 syz-executor 52936 92513 13825 0 2 0x4000000 syz-executor 52936 16548 13825 0 2 0x4000000 syz-executor 57942 424819 91724 0 2 0 syz-executor 57942 484561 91724 0 2 0x4000000 syz-executor 57942 315680 91724 0 3 0x4000080 fsleep syz-executor 57942 121020 91724 0 2 0x4000000 syz-executor 35485 304445 1 0 3 0x100083 ttyin getty 80871 470415 80658 0 2 0x2 syz-executor 14774 212945 80658 0 2 0x3 syz-executor 10084 306259 80658 0 2 0x3 syz-executor 24053 219316 80658 0 2 0x3 syz-executor 3699 432266 0 0 3 0x14200 bored sosplice 13825 175767 80658 0 2 0x3 syz-executor 96104 234064 80658 0 2 0x3 syz-executor 91724 480738 80658 0 2 0x3 syz-executor 99090 350071 80658 0 2 0x2 syz-executor 80658 336629 35503 0 3 0x82 kqread syz-executor 35503 238487 84986 0 3 0x10008a sigsusp ksh 84986 44476 86933 0 3 0x98 kqread sshd-session 86933 70287 75211 0 3 0x92 kqread sshd-session 75211 10345 1 0 3 0x88 kqread sshd 77566 89605 89957 74 3 0x1100092 bpf pflogd 89957 206854 1 0 3 0x80 sbwait pflogd 61183 178771 48259 73 3 0x1100090 kqread syslogd 48259 92237 1 0 3 0x100082 sbwait syslogd 45036 133008 1 0 3 0x100080 kqread resolvd 46862 118145 29723 77 3 0x100092 kqread dhcpleased 72448 207568 29723 77 3 0x100092 kqread dhcpleased 29723 77039 1 0 3 0x80 kqread dhcpleased 25996 406578 0 0 3 0x14200 bored smr 94309 346846 0 0 2 0x14200 zerothread 98720 85251 0 0 3 0x14200 aiodoned aiodoned 63840 264488 0 0 3 0x14200 syncer update 90179 388297 0 0 3 0x14200 cleaner cleaner 56481 406258 0 0 3 0x14200 reaper reaper 73444 516341 0 0 3 0x14200 pgdaemon pagedaemon 62773 442242 0 0 3 0x14200 bored viomb 75191 6577 0 0 3 0x40014200 acpi0 acpi0 96761 108211 0 0 7 0x40014200 idle1 24470 183492 0 0 3 0x14200 bored softnet3 29443 67547 0 0 3 0x14200 bored softnet2 95059 515340 0 0 3 0x14200 bored softnet1 80328 453017 0 0 3 0x14200 bored softnet0 *49687 268613 0 0 7 0x14200 systqmp 50598 329581 0 0 3 0x14200 bored systq 83816 410922 0 0 3 0x14200 tmoslp softclockmp 13659 69862 0 0 3 0x40014200 tmoslp softclock 71661 390308 0 0 3 0x40014200 idle0 1 436353 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 2084 (syz-executor) thread 0xffff80003c42f4a8 (278931) Process 99500 (syz-executor) thread 0xffff80003c42f218 (469496) Process 52936 (syz-executor) thread 0xffff80003c447c68 (92513) Process 80871 (syz-executor) thread 0xffff80003c446f98 (470415) Process 99090 (syz-executor) thread 0xffff80002a2bb208 (350071) Process 49687 (systqmp) thread 0xffff8000ffffea40 (268613) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10253 11178K 12356K 166960K 17485 0 pcb 17 18K 34K 166960K 998 0 rtable 216 11K 13K 166960K 792 0 pf 38 18K 19K 166960K 227 0 ifaddr 39 7K 9K 166960K 169 0 ifgroup 59 2K 3K 166960K 314 0 sysctl 4 1K 9K 166960K 25 0 counters 70 37K 38K 166960K 370 0 ioctlops 0 0K 4K 166960K 2215 0 iov 0 0K 24K 166960K 250 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1477 93K 93K 166960K 4575 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 32 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 106 0 dirhash 12 2K 2K 166960K 72 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2779 0 sigio 0 0K 0K 166960K 77 0 proc 72 91K 128K 166960K 1004 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 478 0 in_multi 74 5K 7K 166960K 258 0 ether_multi 1 0K 0K 166960K 27 0 mrt 1 0K 0K 166960K 34 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 825 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 7 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 167K 185K 166960K 27374 0 UVM aobj 82 7K 7K 166960K 84 0 pinsyscall 43 86K 104K 166960K 4015 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 268 0 NDP 13 0K 2K 166960K 115 0 temp 77 8684K 8812K 166960K 126914 0 kqueue 13 20K 30K 166960K 557 0 SYN cache 2 8K 16K 166960K 3 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 120 278 0 275 3 2 1 2 0 8 0 rtentry 176 240 0 163 6 0 6 6 0 8 0 unpcb 144 2107 0 2090 17 15 2 6 0 8 1 syncache 336 15 0 15 4 3 1 1 0 8 1 tcpqe 32 7 0 7 3 2 1 1 0 8 1 tcpcb 736 1194 0 1181 34 29 5 7 0 8 3 arp 128 36 0 27 1 0 1 1 0 8 0 inpcb 328 3781 0 3765 49 44 5 15 0 8 2 nd6 144 48 0 25 2 0 2 2 0 8 0 pkpcb 40 68 0 68 6 5 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 112 0 112 4 3 1 1 0 8 1 pppxif 1504 20 0 20 6 6 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 15 0 10 1 0 1 1 0 482 0 pffrnode 88 14 0 9 1 0 1 1 0 8 0 pffrent 40 56 0 51 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 164 0 115 1 0 1 1 0 8 0 pfstkey 128 166 0 117 3 0 3 3 0 8 0 pfstate 384 165 0 116 8 0 8 8 0 8 0 pfrule 1344 22 0 16 2 1 1 2 0 8 0 rttmr 136 12 0 12 7 7 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 965 0 607 34 6 28 31 0 8 0 art_table 40 969 0 607 5 0 5 5 0 8 0 art_node 32 241 0 177 1 0 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 100 0 90 1 0 1 1 0 8 0 shmpl 112 81 0 2 3 0 3 3 0 8 0 dirhash 1024 59 0 42 3 0 3 3 0 8 0 dino2pl 256 6800 0 5282 96 0 96 96 0 8 0 ffsino 288 6800 0 5282 110 0 110 110 0 8 0 nchpl 144 10609 0 10008 64 38 26 64 0 8 0 rtmask 32 11 0 11 3 3 0 1 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 41050 0 41049 5 4 1 2 0 8 0 percpumem 16 200 0 150 1 0 1 1 0 8 0 kstatmem 264 184 0 152 5 2 3 3 0 8 0 acpiwqpl 32 4 0 4 1 0 1 1 1 8 1 scsiplug 72 11 0 11 6 6 0 1 0 8 0 scxspl 216 65374 0 65374 20 18 2 8 1 8 2 plimitpl 152 757 0 739 1 0 1 1 0 8 0 sigapl 424 3068 0 3017 10 3 7 9 0 8 0 knotepl 120 547 0 0 17 0 17 17 0 8 0 kqueuepl 224 1047 0 1038 9 7 2 5 0 8 1 pipepl 336 543 0 516 15 9 6 9 0 8 3 fdescpl 520 3024 0 2992 3 0 3 3 0 8 0 filepl 160 23384 0 23169 40 26 14 24 0 8 1 lockfpl 104 2462 0 2460 5 4 1 2 0 8 0 lockfspl 48 1000 0 998 1 0 1 1 0 8 0 sessionpl 144 41 0 32 1 0 1 1 0 8 0 pgrppl 48 109 0 92 1 0 1 1 0 8 0 ucredpl 104 3733 0 3718 1 0 1 1 0 8 0 zombiepl 144 3870 0 3870 1 0 1 1 0 8 1 processpl 1240 3068 0 3017 6 0 6 6 0 8 0 procpl 656 7505 0 7443 8 2 6 8 0 8 0 sosppl 168 20 0 20 5 4 1 1 0 8 1 sockpl 728 6417 0 6381 67 60 7 23 0 8 2 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 1 16 17 0 8 0 mcl2k 2048 81 0 0 10 0 10 10 0 8 0 mtagpl 96 189 0 0 5 0 5 5 0 8 0 mbufpl 256 1331 0 0 79 0 79 79 0 8 0 bufpl 280 27049 0 20907 441 1 440 440 0 8 0 anonpl 32 12184 0 0 98 0 98 98 0 246 0 amapchunkpl 152 94068 0 93617 65 42 23 38 0 158 4 amappl16 200 10165 0 10128 78 66 12 29 0 8 1 amappl15 192 8 0 7 1 0 1 1 0 8 0 amappl14 184 156 0 144 1 0 1 1 0 8 0 amappl13 176 5 0 4 1 0 1 1 0 8 0 amappl12 168 3758 0 3728 3 0 3 3 0 8 0 amappl11 160 79 0 64 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 244 0 244 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 130 0 117 1 0 1 1 0 8 0 amappl6 120 239 0 235 1 0 1 1 0 8 0 amappl5 112 152 0 142 1 0 1 1 0 8 0 amappl4 104 375 0 356 1 0 1 1 0 8 0 amappl3 96 19051 0 18943 4 0 4 4 0 8 0 amappl2 88 808 0 744 2 0 2 2 0 8 0 amappl1 80 21587 0 20994 17 2 15 15 0 8 0 amappl 88 26057 0 25903 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 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 7 0 7 2 1 1 1 0 8 1 dma128 128 257 0 257 4 4 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 83 0 2 2 0 2 2 0 8 0 uaddrrnd 24 3023 0 2992 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3023 0 2992 1 0 1 1 0 8 0 vmmpekpl 168 24923 0 24866 4 0 4 4 0 8 0 vmmpepl 168 197073 0 195090 129 24 105 112 0 357 0 vmsppl 480 3023 0 2992 5 0 5 5 0 8 0 rwobjpl 72 57095 0 50159 137 4 133 136 0 8 0 pdppl 4096 6054 0 5984 117 46 71 85 0 8 1 pvpl 32 19202 0 0 154 0 154 154 0 265 0 pmappl 256 3023 0 2992 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 540 0 102 13 0 13 13 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(ffffffff833d198d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff839cef08,fffffd8077fa4f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:-1 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1584 taskq_thread(ffffffff83854d90) 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(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu_x86.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x4d8 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu_x86.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x4d8 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5