panic: pool_p_free: rttmr free list modified: page 0xfffffd805eab3000; item addr 0xfffffd805eab3dd8; offset 0x10=0x8389b6e0 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *287211 16537 0 0 0x4000000 1 syz-executor 32274 74258 0 0x14000 0x40000200 0 softclock db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83364e11) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff838adc40,fffffd805eab3f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_reclaim(ffffffff838adc40) at pool_reclaim+0x2c2 sys/kern/subr_pool.c:1152 pool_reclaim_all() at pool_reclaim_all+0x48 sys/kern/subr_pool.c:-1 kern_sysctl(ffff80003c4bd344,1,0,ffff80003c4bd378,200000001440,4,64767151156e7b40) at kern_sysctl+0xff3 sys/kern/kern_sysctl.c:672 sys_sysctl(ffff800038c1e2c8,ffff80003c4bd4b0,ffff80003c4bd400) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c4bd4b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4bd4b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaa6c3583640, count: 6 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 *cpu1: pool_p_free: rttmr free list modified: page 0xfffffd805eab3000; item addr 0xfffffd805eab3dd8; offset 0x10=0x8389b6e0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83364e11) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff838adc40,fffffd805eab3f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_reclaim(ffffffff838adc40) at pool_reclaim+0x2c2 sys/kern/subr_pool.c:1152 pool_reclaim_all() at pool_reclaim_all+0x48 sys/kern/subr_pool.c:-1 kern_sysctl(ffff80003c4bd344,1,0,ffff80003c4bd378,200000001440,4,64767151156e7b40) at kern_sysctl+0xff3 sys/kern/kern_sysctl.c:672 sys_sysctl(ffff800038c1e2c8,ffff80003c4bd4b0,ffff80003c4bd400) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c4bd4b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4bd4b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaa6c3583640, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4bcf80 rbx 0xffff8000299eeddf rdx 0xffff800001478400 rcx 0xffff800038c1e2c8 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x297caafe8c32be84 r11 0x6e5174d47471df50 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff81a1edf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4bcf70 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=287211 pid=16537 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038c1e030,0xffff8000348094f0 process=0xffff80002a3e7ab0 user=0xffff80003c4b8000, vmspace=0xfffffd806d4c6998 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 22390 149139 13305 0 2 0x2 sh 16537 316046 20416 0 2 0 syz-executor *16537 287211 20416 0 7 0x4000000 syz-executor 55738 330836 66561 0 2 0 syz-executor 55738 21969 66561 0 3 0x4000080 fsleep syz-executor 33824 373971 86274 60929 2 0x10 syz-executor 33824 207040 86274 60929 3 0x4000090 fsleep syz-executor 33824 486798 86274 60929 3 0x4000090 fsleep syz-executor 13305 126953 96965 0 3 0x82 wait syz-executor 20416 22419 96965 0 2 0xc82 syz-executor 66561 241110 96965 0 2 0xc82 syz-executor 38116 276651 96965 0 3 0x82 nanoslp syz-executor 7379 240322 1 0 3 0x100083 ttyin getty 53841 237335 0 0 3 0x14200 bored sosplice 26032 374528 96965 0 3 0x82 nanoslp syz-executor 11768 23190 96965 0 3 0x82 wait syz-executor 66850 514593 96965 0 3 0x82 wait syz-executor 86274 267144 96965 0 3 0x82 nanoslp syz-executor 96965 311853 85722 0 3 0x82 kqread syz-executor 85722 336660 6998 0 3 0x10008a sigsusp ksh 6998 299362 36826 0 3 0x98 kqread sshd-session 36826 376988 31564 0 3 0x92 kqread sshd-session 31564 416446 1 0 3 0x88 kqread sshd 43020 431130 18794 74 3 0x1100092 bpf pflogd 18794 463536 1 0 3 0x80 sbwait pflogd 90243 58055 4105 73 3 0x1100090 kqread syslogd 4105 175218 1 0 3 0x100082 sbwait syslogd 51894 129269 1 0 3 0x100080 kqread resolvd 63283 102838 15938 77 3 0x100092 kqread dhcpleased 51696 160306 15938 77 3 0x100092 kqread dhcpleased 15938 504561 1 0 3 0x80 kqread dhcpleased 25241 357423 0 0 3 0x14200 bored smr 80739 376270 0 0 3 0x14200 pgzero zerothread 81512 45903 0 0 3 0x14200 aiodoned aiodoned 34238 47495 0 0 3 0x14200 syncer update 43872 398847 0 0 3 0x14200 cleaner cleaner 57761 344680 0 0 3 0x14200 reaper reaper 43131 216973 0 0 3 0x14200 pgdaemon pagedaemon 39778 451073 0 0 3 0x14200 bored viomb 17881 178163 0 0 3 0x40014200 acpi0 acpi0 33780 40107 0 0 3 0x40014200 idle1 91641 513366 0 0 3 0x14200 bored softnet7 93881 84028 0 0 3 0x14200 bored softnet6 33429 17247 0 0 3 0x14200 bored softnet5 89995 280531 0 0 3 0x14200 bored softnet4 80242 456244 0 0 3 0x14200 bored softnet3 83655 171300 0 0 3 0x14200 bored softnet2 21538 78837 0 0 3 0x14200 bored softnet1 50130 254605 0 0 3 0x14200 bored softnet0 90413 73267 0 0 3 0x14200 smrbar systqmp 83285 109855 0 0 3 0x14200 bored systq 90398 223186 0 0 2 0x14200 softclockmp 74258 32274 0 0 7 0x40014200 softclock 77295 196993 0 0 3 0x40014200 idle0 1 202328 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 16537 (syz-executor) thread 0xffff800038c1e2c8 (287211) Process 90413 (systqmp) thread 0xffff8000ffffe298 (73267) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10254 11080K 12372K 166960K 15041 0 pcb 17 18K 20K 166960K 1019 0 rtable 221 13K 14K 166960K 773 0 pf 41 18K 67486K 166960K 457 0 ifaddr 40 8K 8K 166960K 205 0 ifgroup 61 2K 2K 166960K 377 0 sysctl 4 1K 9K 166960K 37 0 counters 72 37K 38K 166960K 680 0 ioctlops 0 0K 6K 166960K 2900 0 iov 0 0K 32K 166960K 228 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1484 93K 94K 166960K 4470 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 24K 36K 166960K 70 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 284 0 dirhash 12 2K 3K 166960K 105 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 3728 0 sigio 0 0K 0K 166960K 64 0 proc 76 131K 164K 166960K 1129 0 subproc 72 4K 4K 166960K 127 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 660 0 in_multi 79 5K 7K 166960K 264 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 1293 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 10 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 256 169K 185K 166960K 36636 0 UVM aobj 54 7K 7K 166960K 60 0 pinsyscall 43 86K 101K 166960K 4984 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 336 0 NDP 16 0K 2K 166960K 156 0 temp 84 8652K 8780K 166960K 191321 0 kqueue 13 20K 34K 166960K 761 0 SYN cache 2 8K 16K 166960K 3 0 ddb{1}> 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 120 419 0 416 4 3 1 3 0 8 0 rtentry 176 227 0 150 5 0 5 5 0 8 0 unpcb 144 3034 0 3015 29 28 1 6 0 8 0 syncache 336 17 0 17 7 7 0 1 0 8 0 tcpqe 32 8 0 8 4 4 0 1 0 8 0 tcpcb 736 1690 0 1683 36 35 1 7 0 8 0 arp 128 27 0 19 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 5222 0 5212 42 41 1 10 0 8 0 nd6 144 42 0 26 1 0 1 1 0 8 0 pkpcb 40 54 0 54 5 5 0 1 0 8 0 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 273 0 272 2 1 1 1 0 8 0 pppxif 1504 13 0 13 10 10 0 1 0 8 0 pfstscr 40 66 0 66 1 1 0 1 0 8 0 pffrag 232 28 0 17 1 0 1 1 0 482 0 pffrnode 88 27 0 16 1 0 1 1 0 8 0 pffrent 40 109 0 98 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 198 0 116 1 0 1 1 0 8 0 pfstkey 128 231 0 149 3 0 3 3 0 8 0 pfstate 384 231 0 149 9 0 9 9 0 8 0 pfrule 1344 28 0 21 2 1 1 2 0 8 0 rttmr 136 5 0 5 2 2 0 1 0 8 0 art_heap8 4096 6 0 2 6 2 4 4 0 8 0 art_heap4 256 985 0 614 36 10 26 30 0 8 2 art_table 40 991 0 616 5 0 5 5 0 8 0 art_node 32 222 0 158 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 7 1 0 1 1 0 8 0 semupl 112 5 0 5 4 4 0 1 0 8 0 semapl 112 281 0 271 1 0 1 1 0 8 0 shmpl 112 57 0 6 2 0 2 2 0 8 0 dirhash 1024 82 0 65 3 0 3 3 0 8 0 dino2pl 256 8671 0 7151 97 1 96 96 0 8 0 ffsino 296 8671 0 7151 118 0 118 118 0 8 0 nchpl 144 13795 0 12093 64 0 64 64 0 8 0 rtmask 32 34 0 34 8 7 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 50352 0 50352 9 8 1 4 0 8 1 percpumem 16 355 0 304 1 0 1 1 0 8 0 kstatmem 264 260 0 228 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 17 0 17 7 6 1 1 0 8 1 scxspl 216 85645 0 85645 17 15 2 8 1 8 2 plimitpl 152 942 0 925 1 0 1 1 0 8 0 sigapl 424 4045 0 3990 11 4 7 9 0 8 0 knotepl 120 848 0 0 24 0 24 24 0 8 0 kqueuepl 224 1646 0 1637 20 18 2 5 0 8 1 pipepl 344 760 0 733 21 18 3 9 0 8 0 fdescpl 528 3976 0 3944 3 0 3 3 0 8 0 filepl 160 30283 0 29997 37 21 16 20 0 8 2 lockfpl 104 1348 0 1346 3 2 1 3 0 8 0 lockfspl 48 454 0 452 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 187 0 170 1 0 1 1 0 8 0 ucredpl 104 4901 0 4885 1 0 1 1 0 8 0 zombiepl 144 5971 0 5967 1 0 1 1 0 8 0 processpl 1248 4045 0 3990 7 1 6 6 0 8 0 procpl 664 10500 0 10441 9 2 7 8 0 8 0 sosppl 168 16 0 16 7 6 1 1 0 8 1 sockpl 752 8952 0 8920 76 63 13 26 0 8 8 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 77 0 0 9 0 9 9 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 561 0 0 32 0 32 32 0 8 0 bufpl 280 36969 0 30826 440 0 440 440 0 8 0 anonpl 32 13281 0 0 107 0 107 107 0 246 0 amapchunkpl 152 125455 0 124901 68 38 30 34 0 158 6 amappl16 200 12835 0 12795 87 72 15 31 0 8 0 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 143 0 131 1 0 1 1 0 8 0 amappl13 176 29 0 29 1 1 0 1 0 8 0 amappl12 168 4721 0 4688 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 11 0 11 3 3 0 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 20 0 17 1 0 1 1 0 8 0 amappl7 128 136 0 123 1 0 1 1 0 8 0 amappl6 120 262 0 256 1 0 1 1 0 8 0 amappl5 112 156 0 146 1 0 1 1 0 8 0 amappl4 104 376 0 355 1 0 1 1 0 8 0 amappl3 96 26061 0 25942 4 0 4 4 0 8 0 amappl2 88 806 0 742 2 0 2 2 0 8 0 amappl1 80 24878 0 24274 17 2 15 15 0 8 0 amappl 88 35129 0 34947 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 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 9 0 9 3 2 1 1 0 8 1 dma128 128 260 0 260 5 4 1 1 0 8 1 dma64 64 9 0 9 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 59 0 6 1 0 1 1 0 8 0 uaddrrnd 24 3976 0 3944 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3976 0 3944 1 0 1 1 0 8 0 vmmpekpl 168 32777 0 32727 3 0 3 3 0 8 0 vmmpepl 168 253814 0 251735 138 33 105 115 0 357 0 vmsppl 488 3975 0 3944 6 1 5 5 0 8 0 rwobjpl 80 70613 0 63660 155 5 150 153 0 8 0 pdppl 4096 7960 0 7888 126 52 74 84 0 8 2 pvpl 32 21558 0 0 174 1 173 173 0 265 0 pmappl 256 3975 0 3944 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 392 0 121 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83825ff0) 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 __mp_lock(ffffffff83921a80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83921a80) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83921a80,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff83780b38) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000fffff4c0) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff83825ff0) 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 __mp_lock(ffffffff83921a80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83921a80) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83921a80,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff83780b38) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000fffff4c0) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83364e11) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff838adc40,fffffd805eab3f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_reclaim(ffffffff838adc40) at pool_reclaim+0x2c2 sys/kern/subr_pool.c:1152 pool_reclaim_all() at pool_reclaim_all+0x48 sys/kern/subr_pool.c:-1 kern_sysctl(ffff80003c4bd344,1,0,ffff80003c4bd378,200000001440,4,64767151156e7b40) at kern_sysctl+0xff3 sys/kern/kern_sysctl.c:672 sys_sysctl(ffff800038c1e2c8,ffff80003c4bd4b0,ffff80003c4bd400) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c4bd4b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4bd4b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaa6c3583640, count: 6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83364e11) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff838adc40,fffffd805eab3f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_reclaim(ffffffff838adc40) at pool_reclaim+0x2c2 sys/kern/subr_pool.c:1152 pool_reclaim_all() at pool_reclaim_all+0x48 sys/kern/subr_pool.c:-1 kern_sysctl(ffff80003c4bd344,1,0,ffff80003c4bd378,200000001440,4,64767151156e7b40) at kern_sysctl+0xff3 sys/kern/kern_sysctl.c:672 sys_sysctl(ffff800038c1e2c8,ffff80003c4bd4b0,ffff80003c4bd400) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c4bd4b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4bd4b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaa6c3583640, count: -9