kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Fri Jul 17 19:02:33 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-8.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. 2020/07/17 19:03:08 parsed 1 programs 2020/07/17 19:03:14 executed programs: 0 login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f2d9700+16 0x0!=0x65a05d13e48a0888 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *103167 32698 0 0 0 1K syz-executor.0 db_enter() at db_enter+0x18 panic(ffffffff823ffe36) at panic+0x15c pool_cache_get(ffffffff828be8a8) at pool_cache_get+0x323 pool_get(ffffffff828be8a8,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c rt_ifa_del(ffff800000aa2700,800100,ffff800000aa2740,0) at rt_ifa_del+0xa1 in6_unlink_ifa(ffff800000aa2700,ffff800000ac6000) at in6_unlink_ifa+0x571 in6_update_ifa(ffff800000ac6000,ffff800020edbe30,0) at in6_update_ifa+0x13e7 in6_ioctl_change_ifaddr(8080691a,ffff800020edbe30,ffff800000ac6000) at in6_ioctl_change_ifaddr+0x40c ifioctl(fffffd806f682c80,8080691a,ffff800020edbe30,ffff800020ddc758) at ifioctl+0xe70 soo_ioctl(fffffd806cf53db8,8080691a,ffff800020edbe30,ffff800020ddc758) at soo_ioctl+0x27c sys_ioctl(ffff800020ddc758,ffff800020edbf48,ffff800020edbf90) at sys_ioctl+0x4a5 syscall(ffff800020edc010) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff31a0, count: 1 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 pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f2d9700+16 0x0!=0x65a05d13e48a0888 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff823ffe36) at panic+0x15c pool_cache_get(ffffffff828be8a8) at pool_cache_get+0x323 pool_get(ffffffff828be8a8,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c rt_ifa_del(ffff800000aa2700,800100,ffff800000aa2740,0) at rt_ifa_del+0xa1 in6_unlink_ifa(ffff800000aa2700,ffff800000ac6000) at in6_unlink_ifa+0x571 in6_update_ifa(ffff800000ac6000,ffff800020edbe30,0) at in6_update_ifa+0x13e7 in6_ioctl_change_ifaddr(8080691a,ffff800020edbe30,ffff800000ac6000) at in6_ioctl_change_ifaddr+0x40c ifioctl(fffffd806f682c80,8080691a,ffff800020edbe30,ffff800020ddc758) at ifioctl+0xe70 soo_ioctl(fffffd806cf53db8,8080691a,ffff800020edbe30,ffff800020ddc758) at soo_ioctl+0x27c sys_ioctl(ffff800020ddc758,ffff800020edbf48,ffff800020edbf90) at sys_ioctl+0x4a5 syscall(ffff800020edc010) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff31a0, count: -14 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020edb6a0 rbx 0xffff800020edb750 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81e9c95f kprintf+0x16f r9 0x1 r10 0x2 r11 0x94cea77777746f3b r12 0x3000000008 r13 0xffff800020edb6b0 r14 0x100 r15 0x1 rip 0xffffffff815638a8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020edb690 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=103167 stat=onproc flags process=0 proc=0 pri=58, usrpri=58, nice=20 forw=0xffffffffffffffff, list=0xffff800020dddd48,0xffffffff828b4398 process=0xffff800020df1b30 user=0xffff800020ed7000, vmspace=0xfffffd807f0005c0 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *32698 103167 2135 0 7 0 syz-executor.0 2135 471024 47016 0 3 0x82 nanosleep syz-executor.0 47016 226277 17975 0 3 0x82 thrsleep syz-execprog 47016 318034 17975 0 3 0x4000082 nanosleep syz-execprog 47016 300486 17975 0 3 0x4000082 thrsleep syz-execprog 47016 33270 17975 0 3 0x4000082 thrsleep syz-execprog 47016 481706 17975 0 3 0x4000082 thrsleep syz-execprog 47016 32458 17975 0 3 0x4000082 kqread syz-execprog 47016 459509 17975 0 3 0x4000082 thrsleep syz-execprog 47016 297064 17975 0 3 0x4000082 thrsleep syz-execprog 47016 126572 17975 0 3 0x4000082 thrsleep syz-execprog 17975 436583 12423 0 3 0x10008a pause ksh 12423 184686 91810 0 3 0x92 select sshd 34128 309956 1 0 3 0x100083 ttyin getty 91810 485083 1 0 3 0x80 select sshd 9294 105622 67824 74 3 0x100092 bpf pflogd 67824 328204 1 0 3 0x80 netio pflogd 17376 509618 80236 73 3 0x100090 kqread syslogd 80236 329152 1 0 3 0x100082 netio syslogd 69300 464708 1 77 3 0x100090 poll dhclient 42690 200734 1 0 3 0x80 poll dhclient 15933 393050 0 0 3 0x14200 bored smr 78067 414965 0 0 3 0x14200 pgzero zerothread 44290 96582 0 0 3 0x14200 aiodoned aiodoned 24312 24516 0 0 3 0x14200 syncer update 53595 408742 0 0 3 0x14200 cleaner cleaner 65189 48692 0 0 3 0x14200 reaper reaper 3419 360548 0 0 3 0x14200 pgdaemon pagedaemon 22487 399841 0 0 3 0x14200 bored crynlk 42358 203820 0 0 3 0x14200 bored crypto 46047 282670 0 0 3 0x40014200 acpi0 acpi0 59446 401500 0 0 3 0x40014200 idle1 87528 175713 0 0 3 0x14200 bored softnet 5522 166944 0 0 3 0x14200 bored systqmp 52669 205336 0 0 3 0x14200 bored systq 68534 383484 0 0 3 0x40014200 bored softclock 14419 114556 0 0 7 0x40014200 idle0 1 132605 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 32698 (syz-executor.0) thread 0xffff800020ddc758 (103167) exclusive rwlock netlock r = 0 (0xffffffff82787348) #0 witness_lock+0x4c7 #1 in6_ioctl_change_ifaddr+0x155 #2 ifioctl+0xe70 #3 soo_ioctl+0x27c #4 sys_ioctl+0x4a5 #5 syscall+0x4a4 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82926118) #0 witness_lock+0x4c7 #1 soo_ioctl+0x26a #2 sys_ioctl+0x4a5 #3 syscall+0x4a4 #4 Xsyscall+0x128 ddb{1}> 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 38 9K 9K 78643K 62 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 3 8K 12K 78643K 41 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 76 12K 12K 78643K 971 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 1919 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 57 0 50 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 1447 0 45 88 0 88 88 0 8 0 ffsino 272 1447 0 45 94 0 94 94 0 8 0 nchpl 144 1689 0 85 60 0 60 60 0 8 0 uvmvnodes 72 1457 0 0 27 0 27 27 0 8 0 vnodes 208 1457 0 0 77 0 77 77 0 8 0 namei 1024 4322 0 4322 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4702 0 4702 9 8 1 7 0 8 1 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 264 0 234 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 496 249 0 234 4 1 3 3 0 8 1 filepl 152 1162 0 1103 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 144 234 0 234 2 1 1 1 0 8 1 processpl 992 264 0 234 5 0 5 5 0 8 1 procpl 624 272 0 234 3 0 3 3 0 8 0 sockpl 400 103 0 84 2 0 2 2 0 8 0 mcl4k 4096 2 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 256 100 0 0 5 0 5 5 0 8 0 bufpl 280 3072 0 132 210 0 210 210 0 8 0 anonpl 16 22874 0 21192 14 2 12 12 0 124 4 amapchunkpl 152 901 0 838 4 0 4 4 0 158 1 amappl16 192 229 0 193 2 0 2 2 0 8 0 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 60 0 51 1 0 1 1 0 8 0 amappl13 168 22 0 20 2 1 1 1 0 8 0 amappl12 160 5 0 4 2 1 1 1 0 8 0 amappl11 152 53 0 38 1 0 1 1 0 8 0 amappl10 144 14 0 12 1 0 1 1 0 8 0 amappl9 136 240 0 238 1 0 1 1 0 8 0 amappl8 128 269 0 261 1 0 1 1 0 8 0 amappl7 120 114 0 103 1 0 1 1 0 8 0 amappl6 112 22 0 20 3 2 1 1 0 8 0 amappl5 104 151 0 135 1 0 1 1 0 8 0 amappl4 96 495 0 468 1 0 1 1 0 8 0 amappl3 88 130 0 123 1 0 1 1 0 8 0 amappl2 80 970 0 906 2 0 2 2 0 8 0 amappl1 72 15537 0 15104 23 5 18 18 0 8 8 amappl 80 498 0 470 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 24 249 0 234 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 249 0 234 1 0 1 1 0 8 0 vmmpekpl 168 6479 0 6456 3 1 2 2 0 8 0 vmmpepl 168 33864 0 32877 84 11 73 73 0 357 29 vmsppl 368 248 0 234 2 0 2 2 0 8 0 pdppl 4096 505 0 468 6 0 6 6 0 8 1 pvpl 32 116093 0 111978 110 6 104 104 0 265 69 pmappl 232 248 0 234 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{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(ffffffff82925f10,ffffffff82925f10) at __sanitizer_cov_trace_cmp4 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff82783ff0) at sched_idle+0x3f7 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(ffffffff82925f10,ffffffff82925f10) at __sanitizer_cov_trace_cmp4 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sched_idle(ffffffff82783ff0) at sched_idle+0x3f7 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 panic(ffffffff823ffe36) at panic+0x15c pool_cache_get(ffffffff828be8a8) at pool_cache_get+0x323 pool_get(ffffffff828be8a8,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c rt_ifa_del(ffff800000aa2700,800100,ffff800000aa2740,0) at rt_ifa_del+0xa1 in6_unlink_ifa(ffff800000aa2700,ffff800000ac6000) at in6_unlink_ifa+0x571 in6_update_ifa(ffff800000ac6000,ffff800020edbe30,0) at in6_update_ifa+0x13e7 in6_ioctl_change_ifaddr(8080691a,ffff800020edbe30,ffff800000ac6000) at in6_ioctl_change_ifaddr+0x40c ifioctl(fffffd806f682c80,8080691a,ffff800020edbe30,ffff800020ddc758) at ifioctl+0xe70 soo_ioctl(fffffd806cf53db8,8080691a,ffff800020edbe30,ffff800020ddc758) at soo_ioctl+0x27c sys_ioctl(ffff800020ddc758,ffff800020edbf48,ffff800020edbf90) at sys_ioctl+0x4a5 syscall(ffff800020edc010) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff31a0, count: 1 ddb{1}> trace db_enter() at db_enter+0x18 panic(ffffffff823ffe36) at panic+0x15c pool_cache_get(ffffffff828be8a8) at pool_cache_get+0x323 pool_get(ffffffff828be8a8,2) at pool_get+0x91 m_get(2,3) at m_get+0x4c rt_ifa_del(ffff800000aa2700,800100,ffff800000aa2740,0) at rt_ifa_del+0xa1 in6_unlink_ifa(ffff800000aa2700,ffff800000ac6000) at in6_unlink_ifa+0x571 in6_update_ifa(ffff800000ac6000,ffff800020edbe30,0) at in6_update_ifa+0x13e7 in6_ioctl_change_ifaddr(8080691a,ffff800020edbe30,ffff800000ac6000) at in6_ioctl_change_ifaddr+0x40c ifioctl(fffffd806f682c80,8080691a,ffff800020edbe30,ffff800020ddc758) at ifioctl+0xe70 soo_ioctl(fffffd806cf53db8,8080691a,ffff800020edbe30,ffff800020ddc758) at soo_ioctl+0x27c sys_ioctl(ffff800020ddc758,ffff800020edbf48,ffff800020edbf90) at sys_ioctl+0x4a5 syscall(ffff800020edc010) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff31a0, count: -14 ddb{1}>