panic: kernel diagnostic assertion "part >= 0 && part < MAXPARTITIONS" failed: file "/syzkaller/managers/main/kernel/sys/kern/subr_disk.c", line 1169 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 16966 58219 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336f9a2) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833a991a,ffffffff83347771,491,ffffffff8339e6c4) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff800000b3d5b8,1f,6000,0) at disk_openpart+0x20d vndopen(e5f,81,6000,ffff80002a7cda08) at vndopen+0x222 sys/dev/vnd.c:203 VOP_OPEN(fffffd8074647438,81,fffffd8007bfd7b8,ffff80002a7cda08) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c9511a0,81,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002a7cda08,ffffff9c,200000000300,80,0,ffff80003c951340) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c9513f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9513f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb63e420c1a0, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "part >= 0 && part < MAXPARTITIONS" failed: file "/syzkaller/managers/main/kernel/sys/kern/subr_disk.c", line 1169 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336f9a2) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833a991a,ffffffff83347771,491,ffffffff8339e6c4) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff800000b3d5b8,1f,6000,0) at disk_openpart+0x20d vndopen(e5f,81,6000,ffff80002a7cda08) at vndopen+0x222 sys/dev/vnd.c:203 VOP_OPEN(fffffd8074647438,81,fffffd8007bfd7b8,ffff80002a7cda08) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c9511a0,81,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002a7cda08,ffffff9c,200000000300,80,0,ffff80003c951340) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c9513f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9513f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb63e420c1a0, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c950da0 rbx 0 rdx 0xffff800001572800 rcx 0 rax 0xffff80002a7cda08 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc9fbda07e3b8572a r11 0xe7acc7baee6f0725 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff81666de5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c950d90 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=16966 pid=58219 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7cd4d8,0xffffffff83918158 process=0xffff800033909698 user=0xffff80003c94c000, vmspace=0xfffffd80731f12f0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 58219 324838 2997 0 2 0 syz-executor *58219 16966 2997 0 7 0x4000000 syz-executor 12698 261953 94246 0 2 0 syz-executor 12698 458665 94246 0 3 0x4000080 fsleep syz-executor 12698 495082 94246 0 3 0x4000080 fsleep syz-executor 7591 443684 44014 0 2 0 syz-executor 7591 282377 44014 0 3 0x4000080 fifor syz-executor 89358 266706 580 0 2 0xc80 syz-executor 89358 112412 580 0 3 0x4000080 fifow syz-executor 89358 270729 580 0 3 0x4000080 fsleep syz-executor 63237 419653 32560 0 2 0xc80 syz-executor 63237 81158 32560 0 3 0x4000080 fsleep syz-executor 63237 25928 32560 0 3 0x4000080 fsleep syz-executor 77516 310146 0 0 3 0x14200 acct acct 2997 417176 57422 0 2 0xc82 syz-executor 74586 452010 1 0 3 0x100083 ttyin getty 32560 315203 57422 0 2 0xc82 syz-executor 47064 260447 57422 0 3 0x82 wait syz-executor 44014 262461 57422 0 3 0x82 nanoslp syz-executor 33639 396440 57422 0 3 0x82 nanoslp syz-executor 82295 245125 57422 0 3 0x82 wait syz-executor 580 131898 57422 0 2 0xc82 syz-executor 94246 392967 57422 0 3 0x82 nanoslp syz-executor 57422 319041 14785 0 3 0x82 kqread syz-executor 14785 458284 11742 0 3 0x10008a sigsusp ksh 11742 205262 76248 0 3 0x98 kqread sshd-session 76248 255044 62640 0 3 0x92 kqread sshd-session 62640 6775 1 0 3 0x88 kqread sshd 28650 487868 36106 73 3 0x1100090 kqread syslogd 36106 79736 1 0 3 0x100082 sbwait syslogd 94145 135962 1 0 3 0x100080 kqread resolvd 55898 396867 32085 77 3 0x100092 kqread dhcpleased 76585 291238 32085 77 3 0x100092 kqread dhcpleased 32085 302337 1 0 3 0x80 kqread dhcpleased 97423 492145 0 0 3 0x14200 bored smr 4841 88669 0 0 2 0x14200 zerothread 21176 235764 0 0 3 0x14200 aiodoned aiodoned 11835 196300 0 0 3 0x14200 syncer update 28216 511826 0 0 3 0x14200 cleaner cleaner 91787 462716 0 0 3 0x14200 reaper reaper 28552 280601 0 0 3 0x14200 pgdaemon pagedaemon 25552 499847 0 0 3 0x14200 bored viomb 87315 133952 0 0 3 0x40014200 acpi0 acpi0 88267 30996 0 0 3 0x14200 bored softnet0 97558 56134 0 0 3 0x14200 bored systqmp 37936 136186 0 0 3 0x14200 bored systq 95872 44715 0 0 3 0x40014200 tmoslp softclock 22889 143199 0 0 3 0x40014200 idle0 1 379288 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10390 11352K 12437K 166960K 14127 0 pcb 19 17K 19K 166960K 406 0 rtable 235 11K 11K 166960K 568 0 pf 31 13K 20K 166960K 137 0 ifaddr 40 7K 8K 166960K 101 0 ifgroup 50 2K 2K 166960K 150 0 sysctl 4 1K 9K 166960K 16 0 counters 32 17K 18K 166960K 95 0 ioctlops 0 0K 4K 166960K 384 0 iov 0 0K 20K 166960K 131 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1526 96K 96K 166960K 2740 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 40 0 dirhash 6 1K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1263 0 sigio 0 0K 0K 166960K 77 0 proc 60 59K 108K 166960K 637 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 167 0 in_multi 85 6K 7K 166960K 158 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 467 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 238 151K 175K 166960K 12706 0 UVM aobj 107 7K 7K 166960K 112 0 pinsyscall 39 78K 94K 166960K 2363 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 63 0 NDP 11 0K 2K 166960K 69 0 temp 79 8660K 8786K 166960K 33179 0 kqueue 13 20K 32K 166960K 258 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 185 0 182 2 0 2 2 0 8 1 rtentry 136 164 0 69 4 0 4 4 0 8 0 unpcb 144 1129 0 1108 6 0 6 6 0 8 5 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 736 774 0 768 10 1 9 10 0 8 8 arp 96 26 0 11 1 0 1 1 0 8 0 ipq 40 7 0 3 1 0 1 1 0 8 0 ipqe 40 13 0 8 1 0 1 1 0 8 0 inpcb 328 1724 0 1713 13 3 10 13 0 8 8 ip6q 72 4 0 2 1 0 1 1 0 8 0 ip6af 40 6 0 4 1 0 1 1 0 8 0 nd6 112 34 0 8 1 0 1 1 0 8 0 pkpcb 40 43 0 43 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 56 0 56 1 0 1 1 0 8 1 pppxif 1384 3 0 3 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 2 1 0 1 1 0 8 1 pfstate 384 1 0 1 1 0 1 1 0 8 1 pfrule 1344 4 0 4 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 651 0 267 31 0 31 31 0 8 6 art_table 40 654 0 267 5 0 5 5 0 8 0 art_node 32 161 0 77 1 0 1 1 0 8 0 sysvmsgpl 40 53 0 50 1 0 1 1 0 8 0 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 108 0 5 3 0 3 3 0 8 0 dirhash 1024 23 0 19 3 0 3 3 0 8 1 dino2pl 256 3807 0 2307 95 0 95 95 0 8 0 ffsino 256 3807 0 2307 95 0 95 95 0 8 0 nchpl 144 5604 0 3904 64 0 64 64 0 8 0 rtmask 32 17 0 17 1 0 1 1 0 8 1 vnodes 216 4694 0 0 261 0 261 261 0 8 0 namei 1024 22325 0 22325 1 0 1 1 0 8 1 vcpupl 3904 1 0 0 1 0 1 1 0 8 0 vmpool 800 1 0 0 1 0 1 1 0 8 0 kstatmem 264 102 0 80 2 0 2 2 0 8 0 scsiplug 72 7 0 7 1 0 1 1 0 8 1 scxspl 216 18243 0 18243 8 0 8 8 1 8 8 plimitpl 152 329 0 312 1 0 1 1 0 8 0 sigapl 424 1547 0 1503 6 0 6 6 0 8 0 knotepl 120 61309 0 61262 17 7 10 17 0 8 7 kqueuepl 184 469 0 460 4 0 4 4 0 8 3 pipepl 304 337 0 310 8 0 8 8 0 8 5 fdescpl 448 1525 0 1495 5 0 5 5 0 8 1 filepl 120 11304 0 11049 14 0 14 14 0 8 6 lockfpl 104 682 0 680 2 0 2 2 0 8 1 lockfspl 48 258 0 256 1 0 1 1 0 8 0 sessionpl 144 26 0 18 1 0 1 1 0 8 0 pgrppl 48 108 0 92 1 0 1 1 0 8 0 ucredpl 104 1838 0 1826 1 0 1 1 0 8 0 zombiepl 144 1506 0 1503 1 0 1 1 0 8 0 processpl 1152 1547 0 1503 4 0 4 4 0 8 0 procpl 664 3194 0 3142 6 0 6 6 0 8 1 sosppl 176 5 0 5 1 0 1 1 0 8 1 sockpl 552 3109 0 3074 17 6 11 14 0 8 8 mcl64k 65536 259 0 259 1 0 1 1 0 8 1 mcl16k 16384 6 0 6 1 0 1 1 0 8 1 mcl9k 9216 22 0 22 1 0 1 1 0 8 1 mcl8k 8192 31 0 31 1 0 1 1 0 8 1 mcl4k 4096 3994 0 3939 16 1 15 16 0 8 7 mcl2k 2048 1927 0 1919 2 0 2 2 0 8 0 mtagpl 96 131 0 15 3 0 3 3 0 8 0 mbufpl 256 18141 0 17856 77 54 23 77 0 8 4 bufpl 280 6650 0 428 445 0 445 445 0 8 0 anonpl 24 198020 0 194536 46 0 46 46 0 187 18 amapchunkpl 152 43436 0 42929 35 0 35 35 0 158 13 amappl16 200 2859 0 2808 34 23 11 16 0 8 8 amappl15 192 1 0 1 1 0 1 1 0 8 1 amappl14 184 4 0 4 1 0 1 1 0 8 1 amappl13 176 411 0 410 1 0 1 1 0 8 0 amappl12 168 1875 0 1836 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 0 1 1 0 8 1 amappl10 152 40 0 30 1 0 1 1 0 8 0 amappl9 144 256 0 255 1 0 1 1 0 8 0 amappl8 136 16 0 15 1 0 1 1 0 8 0 amappl7 128 77 0 76 1 0 1 1 0 8 0 amappl6 120 272 0 260 1 0 1 1 0 8 0 amappl5 112 67 0 58 1 0 1 1 0 8 0 amappl4 104 392 0 367 1 0 1 1 0 8 0 amappl3 96 7448 0 7352 3 0 3 3 0 8 0 amappl2 88 1652 0 1581 2 0 2 2 0 8 0 amappl1 80 14278 0 13741 15 0 15 15 0 8 1 amappl 88 11767 0 11597 5 0 5 5 0 92 0 uvmvnodes 80 142 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 1 0 1 1 0 8 1 dma128 128 258 0 258 1 0 1 1 0 8 1 dma64 64 8 0 8 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 111 0 5 2 0 2 2 0 8 0 uaddrrnd 24 1525 0 1495 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1525 0 1495 1 0 1 1 0 8 0 vmmpekpl 168 13178 0 13145 2 0 2 2 0 8 0 vmmpepl 168 99054 0 97194 95 0 95 95 0 357 12 vmsppl 368 1524 0 1495 4 0 4 4 0 8 1 rwobjpl 40 25741 0 24625 14 0 14 14 0 8 0 pdppl 4096 3058 0 2991 107 40 67 82 0 8 0 pvpl 32 666590 0 657201 124 0 124 124 0 265 34 pmappl 216 1525 0 1495 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 456 0 96 12 0 12 12 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336f9a2) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833a991a,ffffffff83347771,491,ffffffff8339e6c4) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff800000b3d5b8,1f,6000,0) at disk_openpart+0x20d vndopen(e5f,81,6000,ffff80002a7cda08) at vndopen+0x222 sys/dev/vnd.c:203 VOP_OPEN(fffffd8074647438,81,fffffd8007bfd7b8,ffff80002a7cda08) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c9511a0,81,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002a7cda08,ffffff9c,200000000300,80,0,ffff80003c951340) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c9513f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9513f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb63e420c1a0, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336f9a2) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833a991a,ffffffff83347771,491,ffffffff8339e6c4) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff800000b3d5b8,1f,6000,0) at disk_openpart+0x20d vndopen(e5f,81,6000,ffff80002a7cda08) at vndopen+0x222 sys/dev/vnd.c:203 VOP_OPEN(fffffd8074647438,81,fffffd8007bfd7b8,ffff80002a7cda08) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c9511a0,81,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002a7cda08,ffffff9c,200000000300,80,0,ffff80003c951340) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c9513f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9513f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb63e420c1a0, count: -10