panic: malloc: alWlARoNcIaNtG:i onSP Lt oNoO Tl aLrOWgEeRE,D tOypN eS =YS C2,A LsL i3 z4e E=X IT1 8404 6974 40Stopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND 446815 91322 0 0 0x4000000 0 syz-executor.1 *449674 26467 74 0x100012 0 1 pflogd savectx(6,0,13ae2bf814b0,3,13ac14603b16,13aefceca000) at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffcee70, count: 14 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 malloc: allocation too large, type = 2, size = 18446744073709550976 ddb{1}> trace savectx(6,0,13ae2bf814b0,3,13ac14603b16,13aefceca000) at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffcee70, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800020aab8f0 rbx 0 rdx 0xffff800020ac0778 rcx 0 rax 0x31 r8 0xffffffff81a5e3cf kprintf+0x16f r9 0x1 r10 0x25 r11 0xafc69d04a4ba0ba r12 0 r13 0 r14 0xffff800020ac0778 r15 0 rip 0xffffffff820dd3f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800020aab870 ss 0x10 savectx+0xb1: movl $0,%gs:0x530 ddb{1}> show proc PROC (pflogd) pid=449674 stat=onproc flags process=100012 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac1158,0xffff800020ac1658 process=0xffff800020adce00 user=0xffff800020aa6000, vmspace=0xfffffd806e7d62e8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91322 449169 4827 0 2 0 syz-executor.1 91322 369513 4827 0 3 0x4000080 fsleep syz-executor.1 91322 446815 4827 0 7 0x4000000 syz-executor.1 21327 20895 72695 0 2 0x482 syz-executor.0 4827 339428 72695 0 3 0x82 nanosleep syz-executor.1 63238 501219 0 0 3 0x14200 bored sosplice 57744 154113 0 0 3 0x14200 acct acct 72695 336037 78505 0 3 0x82 thrsleep syz-fuzzer 72695 260971 78505 0 3 0x4000082 nanosleep syz-fuzzer 72695 473021 78505 0 3 0x4000082 thrsleep syz-fuzzer 72695 176127 78505 0 3 0x4000082 thrsleep syz-fuzzer 72695 482011 78505 0 3 0x4000082 kqread syz-fuzzer 72695 38522 78505 0 3 0x4000082 thrsleep syz-fuzzer 72695 418301 78505 0 3 0x4000082 thrsleep syz-fuzzer 72695 45347 78505 0 3 0x4000082 thrsleep syz-fuzzer 72695 464743 78505 0 3 0x4000082 thrsleep syz-fuzzer 72695 322916 78505 0 2 0x4000482 syz-fuzzer 78505 240177 76304 0 3 0x10008a pause ksh 76304 400495 35648 0 3 0x92 select sshd 50621 111159 1 0 3 0x100083 ttyin getty 35648 359210 1 0 3 0x80 select sshd *26467 449674 97097 74 7 0x100012 pflogd 97097 114473 1 0 3 0x80 netio pflogd 2977 233061 7211 73 3 0x100090 kqread syslogd 7211 279440 1 0 3 0x100082 netio syslogd 70502 15116 1 77 3 0x100090 poll dhclient 47710 14755 1 0 3 0x80 poll dhclient 92385 392940 0 0 3 0x14200 pgzero zerothread 7729 369512 0 0 3 0x14200 aiodoned aiodoned 82124 107073 0 0 3 0x14200 syncer update 75185 99216 0 0 3 0x14200 cleaner cleaner 4941 477410 0 0 3 0x14200 reaper reaper 81765 272684 0 0 3 0x14200 pgdaemon pagedaemon 94157 7570 0 0 3 0x14200 bored crynlk 4182 80325 0 0 3 0x14200 bored crypto 11145 389387 0 0 3 0x40014200 acpi0 acpi0 45850 280884 0 0 3 0x40014200 idle1 75682 295208 0 0 3 0x14200 bored softnet 42213 216520 0 0 3 0x14200 bored systqmp 5854 487985 0 0 3 0x14200 bored systq 13222 334135 0 0 2 0x40014200 softclock 36528 232162 0 0 3 0x40014200 idle0 5793 352171 0 0 3 0x14200 bored smr 1 193617 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 91322 (syz-executor.1) thread 0xffff800020abf8c8 (446815) shared rwlock vmlistlock r = 0 (0xffff80000066f478) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vm_get_info+0x39 sys/arch/amd64/amd64/vmm.c:3712 #2 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #4 sys_ioctl+0x5b9 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8264cd40) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9542 6436K 7074K 78643K 14096 0 0 pcb 13 8K 8K 78643K 211 0 0 rtable 113 4K 5K 78643K 601 0 0 ifaddr 65 14K 15K 78643K 204 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1542 0 0 iov 0 0K 16K 78643K 121 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1211 76K 77K 78643K 2495 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 14 0 0 VM map 2 1K 1K 78643K 6 0 0 sem 12 0K 0K 78643K 162 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12843 0 0 file desc 5 13K 25K 78643K 1462 0 0 sigio 0 0K 0K 78643K 17 0 0 proc 61 63K 83K 78643K 722 0 0 subproc 32 2K 2K 78643K 102 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 126 0 0 in_multi 33 2K 2K 78643K 129 0 0 ether_multi 1 0K 0K 78643K 8 0 0 mrt 0 0K 0K 78643K 3 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 350 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 100 21K 30K 78643K 5631 0 0 UVM aobj 53 3K 3K 78643K 53 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 220 0 0 NDP 14 0K 0K 78643K 60 0 0 temp 186 3560K 3628K 78643K 28679 0 0 kqueue 0 0K 0K 78643K 11 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 17 0 10 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 87 0 85 1 0 1 1 0 8 0 rtentry 112 88 0 43 2 0 2 2 0 8 0 unpcb 120 453 0 443 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 6261 0 6261 3 3 0 2 0 8 0 tcpcb 544 315 0 308 1 0 1 1 0 8 0 inpcb 280 957 0 948 3 2 1 2 0 8 0 nd6 48 12 0 8 1 0 1 1 0 8 0 pkpcb 40 10 0 10 3 3 0 1 0 8 0 ppxss 1128 26 0 26 5 4 1 1 0 8 1 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 56 0 40 1 0 1 1 0 8 0 pfstkey 112 56 0 40 1 0 1 1 0 8 0 pfstate 328 56 0 40 3 0 3 3 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 256 393 0 177 14 0 14 14 0 8 0 art_table 32 394 0 177 2 0 2 2 0 8 0 art_node 16 87 0 46 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 12 1 0 1 1 0 8 0 semapl 112 160 0 150 1 0 1 1 0 8 0 shmpl 112 51 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3566 0 2165 46 0 46 46 0 8 0 ffsino 272 3566 0 2165 94 0 94 94 0 8 0 nchpl 144 5744 0 4137 61 0 61 61 0 8 0 uvmvnodes 72 4509 0 0 82 0 82 82 0 8 0 vnodes 208 4509 0 0 238 0 238 238 0 8 0 namei 1024 17868 0 17868 3 2 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 4 0 4 2 2 0 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 15777 0 15777 13 10 3 7 0 8 3 plimitpl 152 133 0 125 1 0 1 1 0 8 0 sigapl 432 1650 0 1635 3 1 2 3 0 8 0 futexpl 56 19198 0 19197 2 1 1 1 0 8 0 knotepl 112 408 0 389 1 0 1 1 0 8 0 kqueuepl 104 334 0 332 1 0 1 1 0 8 0 pipepl 112 930 0 911 3 2 1 2 0 8 0 fdescpl 488 1651 0 1635 3 0 3 3 0 8 0 filepl 152 9775 0 9670 7 2 5 6 0 8 0 lockfpl 104 449 0 448 1 0 1 1 0 8 0 lockfspl 48 144 0 143 1 0 1 1 0 8 0 sessionpl 112 22 0 11 1 0 1 1 0 8 0 pgrppl 48 38 0 27 1 0 1 1 0 8 0 ucredpl 96 1803 0 1794 1 0 1 1 0 8 0 zombiepl 144 1635 0 1634 2 1 1 1 0 8 0 processpl 896 1668 0 1634 4 0 4 4 0 8 0 procpl 632 4666 0 4621 6 1 5 5 0 8 1 srpgc 64 8 0 8 4 4 0 1 0 8 0 sosppl 128 15 0 15 4 4 0 1 0 8 0 sockpl 384 1517 0 1496 6 3 3 4 0 8 0 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 13 0 0 2 0 2 2 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 239 0 0 27 0 27 27 0 8 0 mtagpl 80 27 0 0 1 0 1 1 0 8 0 mbufpl 256 270 0 0 15 0 15 15 0 8 0 bufpl 256 10715 0 3667 441 0 441 441 0 8 0 anonpl 16 164867 0 152223 106 38 68 68 0 124 14 amapchunkpl 152 9794 0 9686 23 18 5 12 0 158 0 amappl16 192 7852 0 7148 84 40 44 48 0 8 8 amappl15 184 729 0 729 1 1 0 1 0 8 0 amappl14 176 52 0 50 1 0 1 1 0 8 0 amappl12 160 472 0 471 3 2 1 1 0 8 0 amappl11 152 351 0 333 1 0 1 1 0 8 0 amappl10 144 17 0 11 1 0 1 1 0 8 0 amappl9 136 672 0 666 1 0 1 1 0 8 0 amappl8 128 210 0 185 1 0 1 1 0 8 0 amappl7 120 66 0 59 1 0 1 1 0 8 0 amappl6 112 366 0 355 1 0 1 1 0 8 0 amappl5 104 638 0 623 1 0 1 1 0 8 0 amappl4 96 1444 0 1414 1 0 1 1 0 8 0 amappl3 88 619 0 614 1 0 1 1 0 8 0 amappl2 80 12516 0 12445 3 1 2 3 0 8 0 amappl1 72 45982 0 45525 26 16 10 20 0 8 0 amappl 80 4988 0 4951 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 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 52 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1655 0 1635 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1655 0 1635 1 0 1 1 0 8 0 vmmpekpl 168 15170 0 15136 2 0 2 2 0 8 0 vmmpepl 168 206659 0 204811 173 77 96 105 0 357 12 vmsppl 368 1650 0 1635 2 0 2 2 0 8 0 pdppl 4096 3317 0 3278 7 1 6 6 0 8 0 pvpl 32 462311 0 446507 246 81 165 166 0 265 35 pmappl 232 1654 0 1639 4 3 1 2 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 617 0 6 18 0 18 18 0 8 0