login: 9c.9c.`Sֵv(!r]KŠcC`Sֵv(!r]KŠcCpanic: malloc: allocation too large, type = 2, size = 18446744073709550976 panic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 690 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *508549 99170 0 0 0x4000000 1 syz-executor.0 347001 83850 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82203bfa,ffffffff821f13dc,2b2,ffffffff821d2010) at __assert+0x2e sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: 11 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 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82203bfa,ffffffff821f13dc,2b2,ffffffff821d2010) at __assert+0x2e sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800022b53940 rbx 0xffff800022b539f0 rdx 0xffff800020abe018 rcx 0 rax 0 r8 0xffffffff812e94e3 kprintf+0x173 r9 0x1 r10 0x25 r11 0x92d40fc94c3996b1 r12 0x3000000008 r13 0xffff800022b53950 r14 0x104 r15 0x1 rip 0xffffffff81d56a38 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022b53930 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=508549 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020abe290,0xffff800020abec80 process=0xffff800020a8a390 user=0xffff800022b4e000, vmspace=0xfffffd807f00b8a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99170 506247 90637 0 2 0 syz-executor.0 99170 85036 90637 0 3 0x4000080 ttyout syz-executor.0 *99170 508549 90637 0 7 0x4000000 syz-executor.0 99170 279617 90637 0 2 0x4000000 syz-executor.0 83850 220556 86547 0 2 0 syz-executor.1 83850 347001 86547 0 7 0x4000000 syz-executor.1 86547 440350 19019 0 3 0x82 nanosleep syz-executor.1 18235 448525 1 0 3 0x100083 ttyin getty 90637 396165 19019 0 3 0x82 nanosleep syz-executor.0 92579 219136 0 0 3 0x14200 bored sosplice 19019 286412 31227 0 3 0x82 thrsleep syz-fuzzer 19019 312611 31227 0 3 0x4000082 thrsleep syz-fuzzer 19019 174351 31227 0 3 0x4000082 thrsleep syz-fuzzer 19019 139163 31227 0 3 0x4000082 thrsleep syz-fuzzer 19019 135776 31227 0 3 0x4000082 thrsleep syz-fuzzer 19019 487778 31227 0 3 0x4000082 thrsleep syz-fuzzer 19019 96975 31227 0 3 0x4000082 thrsleep syz-fuzzer 19019 433876 31227 0 3 0x4000082 thrsleep syz-fuzzer 19019 248741 31227 0 3 0x4000082 kqread syz-fuzzer 19019 210956 31227 0 3 0x4000082 thrsleep syz-fuzzer 31227 278662 38229 0 3 0x10008a pause ksh 38229 194633 61624 0 3 0x92 select sshd 61624 474819 1 0 3 0x80 select sshd 54359 219852 65448 74 3 0x100092 bpf pflogd 65448 362670 1 0 3 0x80 netio pflogd 27526 99473 21724 73 3 0x100090 kqread syslogd 21724 15420 1 0 3 0x100082 netio syslogd 89951 305503 0 0 2 0x14200 zerothread 1497 517811 0 0 3 0x14200 aiodoned aiodoned 96886 334307 0 0 3 0x14200 syncer update 82508 193977 0 0 3 0x14200 cleaner cleaner 17936 158956 0 0 3 0x14200 reaper reaper 16936 343408 0 0 3 0x14200 pgdaemon pagedaemon 9822 437372 0 0 3 0x14200 bored crynlk 40218 191132 0 0 3 0x14200 bored crypto 65034 320044 0 0 3 0x40014200 acpi0 acpi0 69423 55155 0 0 3 0x40014200 idle1 64237 86266 0 0 3 0x14200 bored softnet 33430 369133 0 0 3 0x14200 bored systqmp 65845 54285 0 0 3 0x14200 bored systq 52511 243381 0 0 3 0x40014200 bored softclock 69393 261139 0 0 3 0x40014200 idle0 85908 470176 0 0 3 0x14200 bored smr 1 222288 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 83850 (syz-executor.1) thread 0xffff800020abe9f8 (347001) shared rwlock vmlistlock r = 0 (0xffff80000066e478) #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:290 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #4 sys_ioctl+0x5b8 #5 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8265f5f8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x412 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x412 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 9585 6403K 14771K 78643K 20029 0 0 pcb 13 8K 8K 78643K 488 0 0 rtable 115 4K 5K 78643K 1001 0 0 ifaddr 81 19K 21K 78643K 551 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1695 0 0 iov 0 0K 20K 78643K 373 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1203 76K 77K 78643K 4794 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 49 0 0 VM map 2 1K 1K 78643K 6 0 0 sem 12 0K 0K 78643K 469 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 3951 0 0 sigio 0 0K 0K 78643K 72 0 0 proc 55 51K 83K 78643K 1415 0 0 subproc 32 2K 2K 78643K 289 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 366 0 0 in_multi 33 2K 2K 78643K 319 0 0 ether_multi 1 0K 0K 78643K 17 0 0 mrt 0 0K 0K 78643K 7 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 114 503K 503K 78643K 114 0 0 exec 0 0K 1K 78643K 675 0 0 pfkey data 0 0K 0K 78643K 2 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 99 21K 31K 78643K 13670 0 0 UVM aobj 130 5K 5K 78643K 149 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 443 0 0 NDP 19 0K 0K 78643K 169 0 0 temp 221 3556K 3633K 78643K 63632 0 0 kqueue 0 0K 0K 78643K 28 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 36 0 30 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 176 0 176 4 3 1 1 0 8 1 rtentry 112 217 0 173 2 0 2 2 0 8 0 unpcb 120 1298 0 1286 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 7467 0 7467 2 2 0 2 0 8 0 tcpcb 544 809 0 805 1 0 1 1 0 8 0 inpcb 280 2309 0 2305 1 0 1 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 48 2 0 2 1 1 0 1 0 8 0 nd6 48 51 0 45 1 0 1 1 0 8 0 pkpcb 40 12 0 12 5 5 0 1 0 8 0 ppxss 1128 84 0 84 12 11 1 1 0 8 1 pffrag 232 4 0 4 2 2 0 1 0 482 0 pffrnode 88 4 0 4 2 2 0 1 0 8 0 pffrent 40 14 0 14 4 4 0 1 0 8 0 pfosfp 40 846 0 846 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfstitem 24 113 0 78 1 0 1 1 0 8 0 pfstkey 112 113 0 78 2 0 2 2 0 8 0 pfstate 328 113 0 78 4 0 4 4 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 256 873 0 682 15 3 12 13 0 8 0 art_table 32 874 0 682 2 0 2 2 0 8 0 art_node 16 209 0 169 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 1 1 0 1 1 0 8 0 semapl 112 467 0 457 1 0 1 1 0 8 0 shmpl 112 147 0 19 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 7463 0 6030 47 0 47 47 0 8 0 ffsino 272 7463 0 6030 96 0 96 96 0 8 0 nchpl 144 13108 0 11468 62 0 62 62 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 200 5926 0 0 312 0 312 312 0 8 0 namei 1024 42470 0 42470 2 1 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 9 0 9 4 4 0 1 0 8 0 scxspl 192 38067 0 38067 24 23 1 7 0 8 1 plimitpl 152 374 0 367 1 0 1 1 0 8 0 sigapl 432 4110 0 4096 3 1 2 3 0 8 0 futexpl 56 49096 0 49096 1 0 1 1 0 8 1 knotepl 112 929 0 910 1 0 1 1 0 8 0 kqueuepl 104 781 0 779 1 0 1 1 0 8 0 pipepl 112 2340 0 2321 6 5 1 2 0 8 0 fdescpl 488 4111 0 4096 3 0 3 3 0 8 0 filepl 152 24288 0 24189 15 10 5 7 0 8 1 lockfpl 104 1291 0 1291 2 1 1 1 0 8 1 lockfspl 48 400 0 400 2 1 1 1 0 8 1 sessionpl 112 37 0 28 1 0 1 1 0 8 0 pgrppl 48 57 0 48 1 0 1 1 0 8 0 ucredpl 96 4531 0 4523 1 0 1 1 0 8 0 zombiepl 144 4098 0 4098 2 1 1 1 0 8 1 processpl 896 4129 0 4098 4 0 4 4 0 8 0 procpl 632 12158 0 12114 11 7 4 5 0 8 0 srpgc 64 30 0 30 15 15 0 1 0 8 0 sosppl 128 74 0 74 13 13 0 1 0 8 0 sockpl 384 3830 0 3814 12 10 2 4 0 8 0 mcl64k 65536 527 0 0 65 0 65 65 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 15 0 0 2 0 2 2 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 215 0 0 26 2 24 26 0 8 0 mtagpl 80 35 0 0 1 0 1 1 0 8 0 mbufpl 256 796 0 0 39 1 38 38 0 8 0 bufpl 256 16773 0 9754 439 0 439 439 0 8 0 anonpl 16 393149 0 380610 127 60 67 68 0 124 13 amapchunkpl 152 25149 0 25045 44 35 9 12 0 158 4 amappl16 192 19542 0 18810 122 76 46 49 0 8 8 amappl15 184 860 0 858 3 2 1 1 0 8 0 amappl14 176 846 0 839 1 0 1 1 0 8 0 amappl13 168 1749 0 1746 1 0 1 1 0 8 0 amappl12 160 44 0 41 1 0 1 1 0 8 0 amappl11 152 450 0 442 1 0 1 1 0 8 0 amappl10 144 871 0 866 1 0 1 1 0 8 0 amappl9 136 811 0 808 1 0 1 1 0 8 0 amappl8 128 307 0 281 1 0 1 1 0 8 0 amappl7 120 869 0 861 1 0 1 1 0 8 0 amappl6 112 385 0 377 1 0 1 1 0 8 0 amappl5 104 271 0 258 1 0 1 1 0 8 0 amappl4 96 4095 0 4063 2 1 1 2 0 8 0 amappl3 88 1730 0 1716 1 0 1 1 0 8 0 amappl2 80 31705 0 31631 3 1 2 3 0 8 0 amappl1 72 98511 0 98073 27 17 10 20 0 8 0 amappl 80 12670 0 12635 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 64 148 0 19 3 0 3 3 0 8 0 uaddrrnd 24 4115 0 4096 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4115 0 4096 1 0 1 1 0 8 0 vmmpekpl 168 34273 0 34235 2 0 2 2 0 8 0 vmmpepl 168 504491 0 502579 232 133 99 110 0 357 11 vmsppl 368 4110 0 4096 2 0 2 2 0 8 0 pdppl 4096 8237 0 8200 7 2 5 6 0 8 0 pvpl 32 1058922 0 1043199 302 138 164 169 0 265 37 pmappl 232 4114 0 4100 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 706 0 12 20 0 20 20 0 8 0