login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806d4cc300+16 0x0!=0x33a1f2550fd45590 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *409910 32948 0 0x14000 0x40000200 0K softclock db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823fe066) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff828b5e40) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828b5e40) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828b5e40,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copyback(fffffd806d4cc600,80,20,ffff800000ac5d60,2) at m_copyback+0x4d7 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copyback(fffffd806d4cc600,80,20,ffff800000ac5d60,2) at m_copyback+0x4d7 sys/kern/uipc_mbuf.c:790 rtm_msg1(14,ffff800020d96ed8) at rtm_msg1+0x1b2 sys/net/rtsock.c:1552 rtm_addr(14,ffff800000aa2e00) at rtm_addr+0x9b sys/net/rtsock.c:1740 nd6_dad_timer(ffff800000aa2e00) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000af20b0) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline] timeout_run(ffff800000af20b0) at timeout_run+0xc4 sys/kern/kern_timeout.c:490 softclock_thread(ffff800020d89860) at softclock_thread+0x16a sys/kern/kern_timeout.c:580 end trace frame: 0x0, count: 5 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 pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806d4cc300+16 0x0!=0x33a1f2550fd45590 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823fe066) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff828b5e40) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828b5e40) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828b5e40,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copyback(fffffd806d4cc600,80,20,ffff800000ac5d60,2) at m_copyback+0x4d7 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copyback(fffffd806d4cc600,80,20,ffff800000ac5d60,2) at m_copyback+0x4d7 sys/kern/uipc_mbuf.c:790 rtm_msg1(14,ffff800020d96ed8) at rtm_msg1+0x1b2 sys/net/rtsock.c:1552 rtm_addr(14,ffff800000aa2e00) at rtm_addr+0x9b sys/net/rtsock.c:1740 nd6_dad_timer(ffff800000aa2e00) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000af20b0) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline] timeout_run(ffff800000af20b0) at timeout_run+0xc4 sys/kern/kern_timeout.c:490 softclock_thread(ffff800020d89860) at softclock_thread+0x16a sys/kern/kern_timeout.c:580 end trace frame: 0x0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020d96bb0 rbx 0xffff800020d96c60 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff817fa50f kprintf+0x16f r9 0x1 r10 0x2 r11 0xd050bbbc56314bdd r12 0x3000000008 r13 0xffff800020d96bc0 r14 0x100 r15 0x1 rip 0xffffffff81ed2668 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020d96ba0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (softclock) pid=409910 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d89ad0,0xffff800020d89390 process=0xffff800020d8a7c0 user=0xffff800020d92000, vmspace=0xffffffff828fa8e8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78504 108847 19475 0 3 0x82 nanosleep syz-executor.0 19475 204980 23601 0 3 0x82 thrsleep syz-execprog 19475 196375 23601 0 3 0x4000082 nanosleep syz-execprog 19475 362643 23601 0 3 0x4000082 thrsleep syz-execprog 19475 378071 23601 0 3 0x4000082 thrsleep syz-execprog 19475 416015 23601 0 3 0x4000082 thrsleep syz-execprog 19475 396378 23601 0 3 0x4000082 thrsleep syz-execprog 19475 71389 23601 0 3 0x4000082 thrsleep syz-execprog 19475 80451 23601 0 3 0x4000082 kqread syz-execprog 19475 374146 23601 0 3 0x4000082 nanosleep syz-execprog 23601 420426 99215 0 3 0x10008a pause ksh 99215 332575 48736 0 3 0x92 select sshd 45876 357391 1 0 3 0x100083 ttyin getty 48736 424560 1 0 3 0x80 select sshd 68833 202598 19387 74 3 0x100092 bpf pflogd 19387 386985 1 0 3 0x80 netio pflogd 98017 225348 25276 73 3 0x100090 kqread syslogd 25276 501205 1 0 3 0x100082 netio syslogd 13161 455052 1 77 3 0x100090 poll dhclient 37946 342389 1 0 3 0x80 poll dhclient 52195 460081 0 0 3 0x14200 bored smr 72079 73373 0 0 3 0x14200 pgzero zerothread 91752 91210 0 0 3 0x14200 aiodoned aiodoned 12501 360196 0 0 3 0x14200 syncer update 27454 169896 0 0 3 0x14200 cleaner cleaner 2777 447620 0 0 3 0x14200 reaper reaper 1332 522189 0 0 3 0x14200 pgdaemon pagedaemon 9079 131219 0 0 3 0x14200 bored crynlk 52300 280207 0 0 3 0x14200 bored crypto 776 169675 0 0 3 0x40014200 acpi0 acpi0 83356 293626 0 0 7 0x40014200 idle1 4841 108356 0 0 3 0x14200 bored softnet 95429 40595 0 0 3 0x14200 bored systqmp 83790 306590 0 0 3 0x14200 bored systq *32948 409910 0 0 7 0x40014200 softclock 93954 81245 0 0 3 0x40014200 idle0 1 492202 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 32948 (softclock) thread 0xffff800020d89860 (409910) exclusive rwlock netlock r = 0 (0xffffffff8278f3d8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 nd6_dad_timer+0x34 sys/netinet6/nd6_nbr.c:1170 #2 timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline] #2 timeout_run+0xc4 sys/kern/kern_timeout.c:490 #3 softclock_thread+0x16a sys/kern/kern_timeout.c:580 #4 proc_trampoline+0x1c shared rwlock timeout r = 0 (0xffffffff82776840) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 timeout_run+0xb9 sys/kern/kern_timeout.c:489 #2 softclock_thread+0x16a sys/kern/kern_timeout.c:580 #3 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828b55a0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:435 #3 sleep_finish+0x113 sys/kern/kern_synch.c:418 #4 softclock_thread+0x103 sys/kern/kern_timeout.c:575 #5 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9467 6396K 6396K 78643K 10560 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 85 0 counters 41 33K 33K 78643K 41 0 ioctlops 0 0K 4K 78643K 1468 0 mount 1 1K 1K 78643K 1 0 vnodes 1183 74K 75K 78643K 1188 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 2 4K 12K 78643K 64 0 proc 59 63K 83K 78643K 398 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 22 1K 1K 78643K 22 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 197 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 74 12K 12K 78643K 995 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 7 0 temp 29 3853K 3917K 78643K 1965 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 4 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 1 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 296 80 0 74 1 0 1 1 0 8 0 nd6 48 3 0 0 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 10 0 2 1 0 1 1 0 8 0 pfstkey 112 10 0 2 1 0 1 1 0 8 0 pfstate 328 10 0 2 1 0 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 144 0 0 9 0 9 9 0 8 0 art_table 32 145 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1470 0 68 88 0 88 88 0 8 0 ffsino 272 1470 0 68 94 0 94 94 0 8 0 nchpl 144 1735 0 131 60 0 60 60 0 8 0 uvmvnodes 72 1480 0 0 27 0 27 27 0 8 0 vnodes 208 1480 0 0 78 0 78 78 0 8 0 namei 1024 4414 0 4414 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4935 0 4935 9 2 7 7 0 8 7 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 287 0 258 4 0 4 4 0 8 0 knotepl 112 47 0 36 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipepl 304 77 0 70 2 1 1 1 0 8 0 fdescpl 496 272 0 258 3 0 3 3 0 8 0 filepl 152 1208 0 1150 3 0 3 3 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 62 0 53 1 0 1 1 0 8 0 zombiepl 144 258 0 257 2 1 1 1 0 8 0 processpl 992 287 0 257 5 0 5 5 0 8 1 procpl 624 295 0 257 3 0 3 3 0 8 0 sockpl 400 126 0 108 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 76 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 105 0 0 7 0 7 7 0 8 0 mbufpl: pool(0xffffffff828b5e40:mbufpl): free list modified: page 0xfffffd806d4cc000; item ordinal 2; addr 0xfffffd806d4cc700 (p 0xfffffd8079321000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806d4cc000; item ordinal 2; addr 0xfffffd806d4cc700 (p 0xfffffd8079321000); offset 0x0=0x0 mbufpl: pool(0xffffffff828b5e40:mbufpl): page inconsistency: page 0xfffffd806d4cc000; item ordinal 3; addr 0xa5a534ccd9676656 mbufpl: pool(0xffffffff828b5e40:mbufpl): free list modified: page 0xfffffd806d63c000; item ordinal 0; addr 0xfffffd806d63ce00 (p 0xfffffd8079321000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806d63c000; item ordinal 0; addr 0xfffffd806d63ce00 (p 0xfffffd8079321000); offset 0x0=0x0 mbufpl: pool(0xffffffff828b5e40:mbufpl): page inconsistency: page 0xfffffd806d63c000; item ordinal 1; addr 0xbee5f2c181bb0e6c bufpl 280 3096 0 133 212 0 212 212 0 8 0 anonpl 16 23506 0 21834 13 1 12 12 0 124 4 amapchunkpl 152 884 0 818 5 0 5 5 0 158 2 amappl16 192 302 0 264 3 0 3 3 0 8 0 amappl15 184 48 0 47 2 1 1 1 0 8 0 amappl14 176 39 0 32 1 0 1 1 0 8 0 amappl13 168 22 0 20 2 1 1 1 0 8 0 amappl12 160 5 0 5 2 1 1 1 0 8 1 amappl11 152 50 0 34 1 0 1 1 0 8 0 amappl10 144 67 0 63 1 0 1 1 0 8 0 amappl9 136 234 0 233 1 0 1 1 0 8 0 amappl8 128 269 0 262 1 0 1 1 0 8 0 amappl7 120 113 0 103 1 0 1 1 0 8 0 amappl6 112 28 0 24 1 0 1 1 0 8 0 amappl5 104 173 0 158 1 0 1 1 0 8 0 amappl4 96 496 0 470 1 0 1 1 0 8 0 amappl3 88 108 0 100 1 0 1 1 0 8 0 amappl2 80 1008 0 949 3 1 2 2 0 8 0 amappl1 72 15716 0 15299 23 5 18 18 0 8 8 amappl 80 523 0 495 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 272 0 258 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 272 0 258 1 0 1 1 0 8 0 vmmpekpl 168 6507 0 6479 2 0 2 2 0 8 0 vmmpepl 168 34815 0 33874 83 10 73 73 0 357 31 vmsppl 368 271 0 258 2 0 2 2 0 8 0 pdppl 4096 551 0 516 6 0 6 6 0 8 1 pvpl 32 118741 0 114704 109 5 104 104 0 265 70 pmappl 232 271 0 258 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 233 0 4 7 0 7 7 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823fe066) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff828b5e40) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828b5e40) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828b5e40,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copyback(fffffd806d4cc600,80,20,ffff800000ac5d60,2) at m_copyback+0x4d7 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copyback(fffffd806d4cc600,80,20,ffff800000ac5d60,2) at m_copyback+0x4d7 sys/kern/uipc_mbuf.c:790 rtm_msg1(14,ffff800020d96ed8) at rtm_msg1+0x1b2 sys/net/rtsock.c:1552 rtm_addr(14,ffff800000aa2e00) at rtm_addr+0x9b sys/net/rtsock.c:1740 nd6_dad_timer(ffff800000aa2e00) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000af20b0) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline] timeout_run(ffff800000af20b0) at timeout_run+0xc4 sys/kern/kern_timeout.c:490 softclock_thread(ffff800020d89860) at softclock_thread+0x16a sys/kern/kern_timeout.c:580 end trace frame: 0x0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x331 sys/dev/acpi/acpicpu.c:1187 sched_idle(ffff800020d70ff0) at sched_idle+0x3f7 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x331 sys/dev/acpi/acpicpu.c:1187 sched_idle(ffff800020d70ff0) at sched_idle+0x3f7 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5 ddb{1}>