kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Wed May 27 23:29:49 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-0.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.188' (ECDSA) to the list of known hosts. 2020/05/27 23:30:20 parsed 1 programs 2020/05/27 23:30:23 executed programs: 0 login: panic: pool_do_get: mbufpl free list modified: page 0xfffffd806beef000; item addr 0xfffffd806beefd00; offset 0x0=0x0 != 0x13e94684cf0aed3a Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 453357 37936 0 0x2 0x4000000 1 syz-execprog *152330 18433 0 0x14000 0x40000200 0K softclock db_enter() at db_enter+0x18 panic(ffffffff822702ea) at panic+0x15c pool_do_get(ffffffff826825d8,2,ffff800020e27908) at pool_do_get+0x439 pool_get(ffffffff826825d8,2) at pool_get+0xeb m_get(2,1) at m_get+0x4c mld6_sendpkt(ffff8000009da500,83,0) at mld6_sendpkt+0xaf mld6_fasttimeo() at mld6_fasttimeo+0x162 pffasttimo(ffffffff825482d8) at pffasttimo+0x85 timeout_run(ffffffff825482d8) at timeout_run+0xc4 softclock_thread(ffff800020e195f0) at softclock_thread+0x16a 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 0xfffffd806beef000; item addr 0xfffffd806beefd00; offset 0x0=0x0 != 0x13e94684cf0aed3a ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff822702ea) at panic+0x15c pool_do_get(ffffffff826825d8,2,ffff800020e27908) at pool_do_get+0x439 pool_get(ffffffff826825d8,2) at pool_get+0xeb m_get(2,1) at m_get+0x4c mld6_sendpkt(ffff8000009da500,83,0) at mld6_sendpkt+0xaf mld6_fasttimeo() at mld6_fasttimeo+0x162 pffasttimo(ffffffff825482d8) at pffasttimo+0x85 timeout_run(ffffffff825482d8) at timeout_run+0xc4 softclock_thread(ffff800020e195f0) at softclock_thread+0x16a end trace frame: 0x0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e27750 rbx 0xffff800020e27800 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81f98d4f kprintf+0x16f r9 0x1 r10 0x2 r11 0xb4fbc9206177e825 r12 0x3000000008 r13 0xffff800020e27760 r14 0x100 r15 0x1 rip 0xffffffff81295e58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e27740 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (softclock) pid=152330 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e19ad0,0xffff800020e18280 process=0xffff800020e1a7b0 user=0xffff800020e22000, vmspace=0xffffffff826aa2d0 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 57965 79338 37936 0 2 0x482 syz-executor.0 37936 239772 53258 0 3 0x82 kqread syz-execprog 37936 421610 53258 0 2 0x4000482 syz-execprog 37936 443867 53258 0 3 0x4000082 thrsleep syz-execprog 37936 254123 53258 0 3 0x4000082 thrsleep syz-execprog 37936 167059 53258 0 3 0x4000082 thrsleep syz-execprog 37936 494869 53258 0 3 0x4000082 thrsleep syz-execprog 37936 52269 53258 0 3 0x4000082 thrsleep syz-execprog 37936 458998 53258 0 3 0x4000082 thrsleep syz-execprog 37936 453357 53258 0 7 0x4000002 syz-execprog 53258 145810 23250 0 3 0x10008a pause ksh 23250 335779 66341 0 3 0x92 select sshd 4502 330490 1 0 3 0x100083 ttyin getty 66341 137682 1 0 3 0x80 select sshd 16236 34986 14052 74 3 0x100092 bpf pflogd 14052 259802 1 0 3 0x80 netio pflogd 34826 144665 29045 73 3 0x100090 kqread syslogd 29045 267635 1 0 3 0x100082 netio syslogd 70625 188128 1 77 3 0x100090 poll dhclient 79076 27318 1 0 3 0x80 poll dhclient 88465 345094 0 0 3 0x14200 bored smr 71756 175348 0 0 3 0x14200 pgzero zerothread 50244 23349 0 0 3 0x14200 aiodoned aiodoned 46724 435500 0 0 3 0x14200 syncer update 29695 427975 0 0 3 0x14200 cleaner cleaner 23344 104091 0 0 3 0x14200 reaper reaper 63482 118278 0 0 3 0x14200 pgdaemon pagedaemon 30848 396859 0 0 3 0x14200 bored crynlk 70055 387453 0 0 3 0x14200 bored crypto 87415 272659 0 0 3 0x40014200 acpi0 acpi0 96580 3082 0 0 3 0x40014200 idle1 67307 40466 0 0 3 0x14200 bored softnet 84747 9116 0 0 3 0x14200 bored systqmp 32739 238223 0 0 3 0x14200 bored systq *18433 152330 0 0 7 0x40014200 softclock 83492 392732 0 0 3 0x40014200 idle0 1 289321 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 (0xffffffff826825e8) #0 witness_lock+0x4c7 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pool_get+0xbf #4 m_get+0x4c #5 mld6_sendpkt+0xaf #6 mld6_fasttimeo+0x162 #7 pffasttimo+0x85 #8 timeout_run+0xc4 #9 softclock_thread+0x16a #10 proc_trampoline+0x1c Process 37936 (syz-execprog) thread 0xffff800020e6d388 (453357) exclusive rwlock pslock r = 0 (0xffff800020ec84d0) #0 witness_lock+0x4c7 #1 thrsleep+0x36b #2 sys___thrsleep+0xb5 #3 syscall+0x4a4 #4 Xsyscall+0x128 Process 18433 (softclock) thread 0xffff800020e195f0 (152330) exclusive rwlock netlock r = 0 (0xffffffff8253ff98) #0 witness_lock+0x4c7 #1 mld6_fasttimeo+0x1d #2 pffasttimo+0x85 #3 timeout_run+0xc4 #4 softclock_thread+0x16a #5 proc_trampoline+0x1c shared rwlock timeout r = 0 (0xffffffff825307f0) #0 witness_lock+0x4c7 #1 timeout_run+0xb9 #2 softclock_thread+0x16a #3 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8269f760) #0 witness_lock+0x4c7 #1 __mp_acquire_count+0x51 #2 mi_switch+0x392 #3 sleep_finish+0x113 #4 softclock_thread+0x103 #5 proc_trampoline+0x1c exclusive mutex mbufpl r = 0 (0xffffffff826825e8) #0 witness_lock+0x4c7 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pool_get+0xbf #4 m_get+0x4c #5 mld6_sendpkt+0xaf #6 mld6_fasttimeo+0x162 #7 pffasttimo+0x85 #8 timeout_run+0xc4 #9 softclock_thread+0x16a #10 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 119 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 98 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 1026 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 5 0K 0K 78643K 7 0 temp 29 3029K 3093K 78643K 2027 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 280 114 0 108 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 1504 0 102 88 0 88 88 0 8 0 ffsino 272 1504 0 102 94 0 94 94 0 8 0 nchpl 144 1802 0 199 60 0 60 60 0 8 0 uvmvnodes 72 1514 0 0 28 0 28 28 0 8 0 vnodes 208 1514 0 0 80 0 80 80 0 8 0 namei 1024 4530 0 4530 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4476 0 4476 9 2 7 7 0 8 7 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 321 0 292 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 pipelkpl 48 77 0 70 2 1 1 1 0 8 0 pipepl 120 154 0 141 2 1 1 1 0 8 0 fdescpl 496 306 0 292 3 0 3 3 0 8 0 filepl 152 1275 0 1217 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 144 292 0 291 2 1 1 1 0 8 0 processpl 984 321 0 291 5 0 5 5 0 8 1 procpl 624 329 0 291 4 0 4 4 0 8 1 sockpl 400 160 0 142 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 80 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 110 0 0 7 0 7 7 0 8 0 mbufpl: pool(0xffffffff826825d8:mbufpl): free list modified: page 0xfffffd806f687000; item ordinal 0; addr 0xfffffd806f687f00 (p 0xfffffd806f332000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806f687000; item ordinal 0; addr 0xfffffd806f687f00 (p 0xfffffd806f332000); offset 0x0=0x0 mbufpl: pool(0xffffffff826825d8:mbufpl): page inconsistency: page 0xfffffd806f687000; item ordinal 1; addr 0xcec032b4779dacbc mbufpl: pool(0xffffffff826825d8:mbufpl): free list modified: page 0xfffffd806beef000; item ordinal 0; addr 0xfffffd806beefd00 (p 0xfffffd806dc4b000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806beef000; item ordinal 0; addr 0xfffffd806beefd00 (p 0xfffffd806dc4b000); offset 0x0=0x0 mbufpl: pool(0xffffffff826825d8:mbufpl): page inconsistency: page 0xfffffd806beef000; item ordinal 1; addr 0x2f2fc65c923b31ab bufpl 280 3069 0 133 210 0 210 210 0 8 0 anonpl 16 24355 0 22669 13 1 12 12 0 124 3 amapchunkpl 152 882 0 816 4 0 4 4 0 158 1 amappl16 192 477 0 441 3 0 3 3 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 111 0 107 1 0 1 1 0 8 0 amappl13 168 24 0 21 2 1 1 1 0 8 0 amappl12 160 14 0 11 2 1 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 15 0 12 1 0 1 1 0 8 0 amappl9 136 231 0 229 1 0 1 1 0 8 0 amappl8 128 274 0 267 1 0 1 1 0 8 0 amappl7 120 116 0 105 1 0 1 1 0 8 0 amappl6 112 21 0 19 2 1 1 1 0 8 0 amappl5 104 222 0 207 1 0 1 1 0 8 0 amappl4 96 493 0 465 1 0 1 1 0 8 0 amappl3 88 185 0 180 1 0 1 1 0 8 0 amappl2 80 1065 0 1006 3 1 2 2 0 8 0 amappl1 72 15924 0 15503 23 5 18 18 0 8 8 amappl 80 556 0 528 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 306 0 292 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 306 0 292 1 0 1 1 0 8 0 vmmpekpl 168 6523 0 6498 2 0 2 2 0 8 0 vmmpepl 168 36024 0 35092 83 11 72 72 0 357 30 vmsppl 368 305 0 292 2 0 2 2 0 8 0 pdppl 4096 620 0 584 6 0 6 6 0 8 0 pvpl 32 122299 0 118238 109 5 104 104 0 265 69 pmappl 232 305 0 292 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 234 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 panic(ffffffff822702ea) at panic+0x15c pool_do_get(ffffffff826825d8,2,ffff800020e27908) at pool_do_get+0x439 pool_get(ffffffff826825d8,2) at pool_get+0xeb m_get(2,1) at m_get+0x4c mld6_sendpkt(ffff8000009da500,83,0) at mld6_sendpkt+0xaf mld6_fasttimeo() at mld6_fasttimeo+0x162 pffasttimo(ffffffff825482d8) at pffasttimo+0x85 timeout_run(ffffffff825482d8) at timeout_run+0xc4 softclock_thread(ffff800020e195f0) at softclock_thread+0x16a end trace frame: 0x0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc sleep_setup(ffff800020f3d150,ffff800020f3d208,120,ffffffff8224e63d) at sleep_setup+0xcf rwsleep(ffff800020f3d208,ffff800020ec84c0,120,ffffffff8224e63d,0) at rwsleep+0x81 thrsleep(ffff800020e6d388,ffff800020f3d2f0) at thrsleep+0x3f2 sys___thrsleep(ffff800020e6d388,ffff800020f3d2f0,ffff800020f3d340) at sys___thrsleep+0xb5 syscall(ffff800020f3d3c0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0001abe38, count: 5 ddb{1}> trace x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc sleep_setup(ffff800020f3d150,ffff800020f3d208,120,ffffffff8224e63d) at sleep_setup+0xcf rwsleep(ffff800020f3d208,ffff800020ec84c0,120,ffffffff8224e63d,0) at rwsleep+0x81 thrsleep(ffff800020e6d388,ffff800020f3d2f0) at thrsleep+0x3f2 sys___thrsleep(ffff800020e6d388,ffff800020f3d2f0,ffff800020f3d340) at sys___thrsleep+0xb5 syscall(ffff800020f3d3c0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0001abe38, count: -10 ddb{1}>