login: panic: pool_do_get: mbufpl free list modified: page 0xfffffd807f00d000; item addr 0xfffffd807f00d200; offset 0x0=0x0 != 0xcd54101a19e27cf9 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 158854 48056 0 0x2 0x4000480 1 syz-execprog *250030 96076 0 0x14000 0x40000200 0K softclock db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249cdc0) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff828ecef0,2,ffff800020d97568) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff828ecef0,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 rtm_msg1(14,ffff800020d97678) at rtm_msg1+0x6e sys/net/rtsock.c:1534 rtm_addr(14,ffff800000aa0500) at rtm_addr+0x9b sys/net/rtsock.c:1740 nd6_dad_timer(ffff800000aa0500) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000aed630) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:185 [inline] timeout_run(ffff800000aed630) at timeout_run+0xc4 sys/kern/kern_timeout.c:496 softclock_thread(ffff800020d88ea0) at softclock_thread+0x16a sys/kern/kern_timeout.c:592 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_do_get: mbufpl free list modified: page 0xfffffd807f00d000; item addr 0xfffffd807f00d200; offset 0x0=0x0 != 0xcd54101a19e27cf9 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249cdc0) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff828ecef0,2,ffff800020d97568) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff828ecef0,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 rtm_msg1(14,ffff800020d97678) at rtm_msg1+0x6e sys/net/rtsock.c:1534 rtm_addr(14,ffff800000aa0500) at rtm_addr+0x9b sys/net/rtsock.c:1740 nd6_dad_timer(ffff800000aa0500) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000aed630) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:185 [inline] timeout_run(ffff800000aed630) at timeout_run+0xc4 sys/kern/kern_timeout.c:496 softclock_thread(ffff800020d88ea0) at softclock_thread+0x16a sys/kern/kern_timeout.c:592 end trace frame: 0x0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020d973b0 rbx 0xffff800020d97460 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff823bfbdf kprintf+0x16f r9 0x1 r10 0x2 r11 0x30f090498183f225 r12 0x3000000008 r13 0xffff800020d973c0 r14 0x100 r15 0x1 rip 0xffffffff8236cd38 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020d973a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (softclock) pid=250030 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d89110,0xffff800020d88760 process=0xffff800020d8aba0 user=0xffff800020d92000, vmspace=0xffffffff828c0680 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10544 203015 48056 0 2 0x482 syz-executor.0 48056 103771 93271 0 3 0x82 thrsleep syz-execprog 48056 158854 93271 0 7 0x4000482 syz-execprog 48056 219758 93271 0 3 0x4000082 thrsleep syz-execprog 48056 332107 93271 0 3 0x4000082 thrsleep syz-execprog 48056 120287 93271 0 3 0x4000082 thrsleep syz-execprog 48056 278648 93271 0 3 0x4000082 thrsleep syz-execprog 48056 443588 93271 0 3 0x4000082 kqread syz-execprog 48056 373997 93271 0 3 0x4000082 thrsleep syz-execprog 93271 518336 12078 0 3 0x10008a pause ksh 12078 210459 1116 0 3 0x92 select sshd 14551 477182 1 0 3 0x100083 ttyin getty 1116 158312 1 0 3 0x80 select sshd 52658 352326 24888 74 3 0x100092 bpf pflogd 24888 96102 1 0 3 0x80 netio pflogd 26074 22281 39733 73 3 0x100090 kqread syslogd 39733 483057 1 0 3 0x100082 netio syslogd 73603 295468 1 77 3 0x100090 poll dhclient 89783 347753 1 0 3 0x80 poll dhclient 48439 255123 0 0 3 0x14200 bored smr 26912 212055 0 0 3 0x14200 pgzero zerothread 47242 376505 0 0 3 0x14200 aiodoned aiodoned 24698 414392 0 0 3 0x14200 syncer update 11949 488939 0 0 3 0x14200 cleaner cleaner 99491 855 0 0 3 0x14200 reaper reaper 95990 16959 0 0 3 0x14200 pgdaemon pagedaemon 60971 363638 0 0 3 0x14200 bored crynlk 90327 42697 0 0 3 0x14200 bored crypto 50037 164417 0 0 3 0x40014200 acpi0 acpi0 81656 190680 0 0 3 0x40014200 idle1 39571 507541 0 0 3 0x14200 bored softnet 52643 334219 0 0 3 0x14200 bored systqmp 63421 86418 0 0 3 0x14200 bored systq *96076 250030 0 0 7 0x40014200 softclock 62561 23940 0 0 3 0x40014200 idle0 1 30486 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex mbufpl r = 0 (0xffffffff828ecf00) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 #5 rtm_msg1+0x6e sys/net/rtsock.c:1534 #6 rtm_addr+0x9b sys/net/rtsock.c:1740 #7 nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 #8 timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:185 [inline] #8 timeout_run+0xc4 sys/kern/kern_timeout.c:496 #9 softclock_thread+0x16a sys/kern/kern_timeout.c:592 #10 proc_trampoline+0x1c Process 96076 (softclock) thread 0xffff800020d88ea0 (250030) exclusive rwlock netlock r = 0 (0xffffffff827b4428) #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:185 [inline] #2 timeout_run+0xc4 sys/kern/kern_timeout.c:496 #3 softclock_thread+0x16a sys/kern/kern_timeout.c:592 #4 proc_trampoline+0x1c shared rwlock timeout r = 0 (0xffffffff82793fe8) #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:495 #2 softclock_thread+0x16a sys/kern/kern_timeout.c:592 #3 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828dc730) #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:587 #5 proc_trampoline+0x1c exclusive mutex mbufpl r = 0 (0xffffffff828ecf00) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 #5 rtm_msg1+0x6e sys/net/rtsock.c:1534 #6 rtm_addr+0x9b sys/net/rtsock.c:1740 #7 nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 #8 timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:185 [inline] #8 timeout_run+0xc4 sys/kern/kern_timeout.c:496 #9 softclock_thread+0x16a sys/kern/kern_timeout.c:592 #10 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9464 6394K 6394K 78643K 10557 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 78 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 57 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 89 12K 13K 78643K 1000 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 6 0K 0K 78643K 7 0 temp 29 3849K 3913K 78643K 1948 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 73 0 67 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 11 0 2 1 0 1 1 0 8 0 pfstkey 112 11 0 2 1 0 1 1 0 8 0 pfstate 328 11 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 1461 0 61 88 0 88 88 0 8 0 ffsino 272 1461 0 61 94 0 94 94 0 8 0 nchpl 144 1718 0 117 61 1 60 60 0 8 0 uvmvnodes 72 1471 0 0 27 0 27 27 0 8 0 vnodes 208 1471 0 0 78 0 78 78 0 8 0 namei 1024 4382 0 4382 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4807 0 4807 9 3 6 7 0 8 6 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 280 0 251 4 0 4 4 0 8 0 knotepl 112 48 0 36 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipepl 304 78 0 70 2 1 1 1 0 8 0 fdescpl 496 265 0 251 3 0 3 3 0 8 0 filepl 152 1192 0 1132 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 144 251 0 250 2 1 1 1 0 8 0 processpl 992 280 0 250 5 0 5 5 0 8 1 procpl 624 287 0 250 3 0 3 3 0 8 0 sockpl 400 119 0 101 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 56 0 0 7 0 7 7 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 91 0 0 5 0 5 5 0 8 0 mbufpl: pool(0xffffffff828ecef0:mbufpl): free list modified: page 0xfffffd807f00d000; item ordinal 0; addr 0xfffffd807f00d200 (p 0xfffffd807f7c4000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd807f00d000; item ordinal 0; addr 0xfffffd807f00d200 (p 0xfffffd807f7c4000); offset 0x0=0x0 mbufpl: pool(0xffffffff828ecef0:mbufpl): page inconsistency: page 0xfffffd807f00d000; item ordinal 1; addr 0x6818f5e432de9fdb bufpl 280 3026 0 127 208 0 208 208 0 8 0 anonpl 16 23325 0 21580 14 2 12 12 0 124 4 amapchunkpl 152 922 0 817 5 0 5 5 0 158 0 amappl16 192 288 0 255 2 0 2 2 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 44 0 42 1 0 1 1 0 8 0 amappl13 168 23 0 20 2 1 1 1 0 8 0 amappl12 160 22 0 19 1 0 1 1 0 8 0 amappl11 152 53 0 38 1 0 1 1 0 8 0 amappl10 144 24 0 21 1 0 1 1 0 8 0 amappl9 136 222 0 219 1 0 1 1 0 8 0 amappl8 128 283 0 264 1 0 1 1 0 8 0 amappl7 120 108 0 100 1 0 1 1 0 8 0 amappl6 112 28 0 25 1 0 1 1 0 8 0 amappl5 104 170 0 155 1 0 1 1 0 8 0 amappl4 96 501 0 475 1 0 1 1 0 8 0 amappl3 88 165 0 157 1 0 1 1 0 8 0 amappl2 80 982 0 924 3 1 2 2 0 8 0 amappl1 72 15858 0 15438 23 5 18 18 0 8 8 amappl 80 524 0 489 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 24 265 0 251 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 265 0 251 1 0 1 1 0 8 0 vmmpekpl 168 6474 0 6446 2 0 2 2 0 8 0 vmmpepl 168 34523 0 33572 85 12 73 73 0 357 29 vmsppl 368 264 0 251 2 0 2 2 0 8 0 pdppl 4096 537 0 502 6 0 6 6 0 8 1 pvpl 32 117904 0 113838 110 6 104 104 0 265 69 pmappl 232 264 0 251 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 228 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(ffffffff8249cdc0) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff828ecef0,2,ffff800020d97568) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff828ecef0,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 rtm_msg1(14,ffff800020d97678) at rtm_msg1+0x6e sys/net/rtsock.c:1534 rtm_addr(14,ffff800000aa0500) at rtm_addr+0x9b sys/net/rtsock.c:1740 nd6_dad_timer(ffff800000aa0500) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000aed630) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:185 [inline] timeout_run(ffff800000aed630) at timeout_run+0xc4 sys/kern/kern_timeout.c:496 softclock_thread(ffff800020d88ea0) at softclock_thread+0x16a sys/kern/kern_timeout.c:592 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 __sanitizer_cov_trace_cmp4(ffffffff828dc528,ffffffff828dc528) at __sanitizer_cov_trace_cmp4+0xb sys/dev/kcov.c:134 __mp_acquire_count(ffffffff828dc528,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800020e7c190,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020e7c190,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020e7c190,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff827ea6d8,120,ffffffff823fab70,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e40600,ffff800020e7c2c0,ffff800020e7c310) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020e7c390) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e7c390) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000041f20, count: 3 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 __sanitizer_cov_trace_cmp4(ffffffff828dc528,ffffffff828dc528) at __sanitizer_cov_trace_cmp4+0xb sys/dev/kcov.c:134 __mp_acquire_count(ffffffff828dc528,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800020e7c190,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020e7c190,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020e7c190,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff827ea6d8,120,ffffffff823fab70,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e40600,ffff800020e7c2c0,ffff800020e7c310) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020e7c390) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e7c390) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000041f20, count: -12 ddb{1}>