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 *254652 64691 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833688fd) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833a8065,ffffffff8334703b,491,ffffffff8339dd57) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff800000b3d048,22,6000,0) at disk_openpart+0x20d vndopen(e22,7,6000,ffff80003c937cb0) at vndopen+0x222 sys/dev/vnd.c:203 VOP_OPEN(fffffd806aded298,7,fffffd8007bfd5b0,ffff80003c937cb0) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c9d5960,207,e4) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80003c937cb0,ffffff9c,200000000480,206,f6,ffff80003c9d5b00) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c9d5bb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9d5bb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x854f7228cf0, 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(ffffffff833688fd) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833a8065,ffffffff8334703b,491,ffffffff8339dd57) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff800000b3d048,22,6000,0) at disk_openpart+0x20d vndopen(e22,7,6000,ffff80003c937cb0) at vndopen+0x222 sys/dev/vnd.c:203 VOP_OPEN(fffffd806aded298,7,fffffd8007bfd5b0,ffff80003c937cb0) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c9d5960,207,e4) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80003c937cb0,ffffff9c,200000000480,206,f6,ffff80003c9d5b00) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c9d5bb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9d5bb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x854f7228cf0, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c9d5560 rbx 0 rdx 0xffff800001467980 rcx 0 rax 0xffff80003c937cb0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x240686286f61f181 r11 0x211d10b7140c3f5 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff819f7bb5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c9d5550 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=254652 pid=64691 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=0xffff8000314f07e0,0xffffffff83998d40 process=0xffff8000ffff9b18 user=0xffff80003c9d0000, vmspace=0xfffffd800dc062f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 64691 13266 84463 0 2 0 syz-executor *64691 254652 84463 0 7 0x4000000 syz-executor 90290 219866 99047 0 2 0 syz-executor 90290 198978 99047 0 3 0x4000080 fsleep syz-executor 90290 3088 99047 0 3 0x4000080 fsleep syz-executor 36108 423668 1010 0 3 0x4081000 smrbar syz-executor 36108 229862 1010 0 3 0x4003000 suspend syz-executor 9348 291800 85290 -1 2 0x10 syz-executor 9348 280188 85290 -1 3 0x4000090 fsleep syz-executor 93809 437089 10808 -1 2 0x10 syz-executor 93809 124463 10808 -1 3 0x4000090 msgwait syz-executor 93809 383559 10808 -1 3 0x4000090 msgwait syz-executor 93809 386921 10808 -1 3 0x4000090 bell syz-executor 23464 70459 88957 0 2 0x2 syz-executor 43456 43094 0 0 3 0x14280 nfsidl nfsio 33652 293486 0 0 3 0x14280 nfsidl nfsio 10131 111161 0 0 3 0x14280 nfsidl nfsio 20033 296553 0 0 3 0x14280 nfsidl nfsio 90249 275298 0 0 3 0x14280 nfsidl nfsio 87960 436347 0 0 3 0x14280 nfsidl nfsio 75509 63100 0 0 3 0x14280 nfsidl nfsio 26514 393663 0 0 3 0x14280 nfsidl nfsio 70826 210741 0 0 3 0x14280 nfsidl nfsio 83805 521630 0 0 3 0x14280 nfsidl nfsio 34533 122296 0 0 3 0x14280 nfsidl nfsio 84418 11148 0 0 3 0x14280 nfsidl nfsio 11948 242885 0 0 3 0x14280 nfsidl nfsio 90124 341063 0 0 3 0x14280 nfsidl nfsio 13199 390352 0 0 3 0x14280 nfsidl nfsio 65500 371416 0 0 3 0x14280 nfsidl nfsio 32553 462414 0 0 3 0x14280 nfsidl nfsio 52227 135352 0 0 3 0x14280 nfsidl nfsio 1014 508523 0 0 3 0x14280 nfsidl nfsio 98132 259618 0 0 3 0x14280 nfsidl nfsio 52709 494089 88957 0 3 0x82 wait syz-executor 78281 225717 88957 0 2 0xc82 syz-executor 99047 370777 88957 0 2 0xc82 syz-executor 84463 257509 88957 0 2 0xc82 syz-executor 85290 287752 88957 0 2 0xc82 syz-executor 10808 89628 88957 0 3 0x82 nanoslp syz-executor 1010 365464 88957 0 2 0xc82 syz-executor 88957 103233 82557 0 3 0x82 kqread syz-executor 82557 454690 61945 0 3 0x10008a sigsusp ksh 61945 500333 37455 0 3 0x98 kqread sshd-session 37455 205172 98722 0 3 0x92 kqread sshd-session 71616 399137 1 0 3 0x100083 ttyin getty 98722 238438 1 0 3 0x88 kqread sshd 52281 369673 94730 73 3 0x1100090 kqread syslogd 94730 235250 1 0 3 0x100082 sbwait syslogd 86119 428154 1 0 3 0x100080 kqread resolvd 58418 489848 15591 77 3 0x100092 kqread dhcpleased 63607 440293 15591 77 3 0x100092 kqread dhcpleased 15591 230229 1 0 3 0x80 kqread dhcpleased 7337 310350 0 0 3 0x14200 bored smr 55295 457562 0 0 2 0x14200 zerothread 20013 426114 0 0 3 0x14200 aiodoned aiodoned 44078 471438 0 0 3 0x14200 syncer update 98424 410539 0 0 3 0x14200 cleaner cleaner 14559 477451 0 0 3 0x14200 reaper reaper 5345 86261 0 0 3 0x14200 pgdaemon pagedaemon 6877 327503 0 0 3 0x14200 bored viomb 73965 23010 0 0 3 0x40014200 acpi0 acpi0 16874 472685 0 0 3 0x14200 bored softnet0 78215 310995 0 0 3 0x14200 smrbar systqmp 36056 142411 0 0 3 0x14200 bored systq 7224 446824 0 0 3 0x40014200 tmoslp softclock 7865 168415 0 0 3 0x40014200 idle0 1 452959 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 10219 11116K 11993K 166960K 13019 0 pcb 18 19K 21K 166960K 271 0 rtable 180 8K 9K 166960K 476 0 pf 40 14K 22K 166960K 248 0 ifaddr 37 6K 7K 166960K 87 0 ifgroup 58 2K 2K 166960K 142 0 sysctl 4 1K 9K 166960K 46 0 counters 38 18K 18K 166960K 136 0 ioctlops 0 0K 4K 166960K 408 0 iov 0 0K 16K 166960K 104 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 90K 166960K 2351 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 6K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 36 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 896 0 sigio 0 0K 0K 166960K 76 0 proc 60 59K 91K 166960K 573 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 244 0 in_multi 66 4K 7K 166960K 134 0 ether_multi 2 0K 0K 166960K 6 0 mrt 2 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 588 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 239 151K 168K 166960K 9515 0 UVM aobj 90 9K 9K 166960K 91 0 pinsyscall 38 76K 92K 166960K 2010 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 36 0 NDP 14 0K 2K 166960K 61 0 temp 60 8660K 8723K 166960K 30927 0 kqueue 13 20K 28K 166960K 153 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 89 0 86 1 0 1 1 0 8 0 rtentry 136 137 0 71 4 0 4 4 0 8 0 unpcb 144 856 0 835 8 5 3 6 0 8 2 syncache 336 10 0 10 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 407 0 401 13 6 7 7 0 8 6 arp 96 23 0 9 1 0 1 1 0 8 0 ipq 40 4 0 0 1 0 1 1 0 8 0 ipqe 40 6 0 1 1 0 1 1 0 8 0 inpcb 328 1177 0 1166 20 10 10 13 0 8 8 ip6q 72 3 0 0 1 0 1 1 0 8 0 ip6af 40 3 0 0 1 0 1 1 0 8 0 nd6 112 30 0 17 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 93 0 88 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 1 1 0 1 1 0 8 0 pfstate 384 3 0 0 1 0 1 1 0 8 0 pfrule 1344 5 0 5 2 1 1 1 0 8 1 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 564 0 289 29 4 25 29 0 8 3 art_table 40 566 0 289 5 0 5 5 0 8 0 art_node 32 137 0 76 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 86 0 1 3 0 3 3 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3146 0 1649 95 0 95 95 0 8 0 ffsino 256 3146 0 1649 95 0 95 95 0 8 0 nchpl 144 4388 0 2690 64 0 64 64 0 8 0 rtmask 32 8 0 5 1 0 1 1 0 8 0 vnodes 216 3793 0 0 211 0 211 211 0 8 0 namei 1024 15166 0 15165 3 2 1 2 0 8 0 vcpupl 3904 2 0 0 1 0 1 1 0 8 0 vmpool 800 2 0 0 1 0 1 1 0 8 0 kstatmem 264 86 0 58 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 13957 0 13957 9 7 2 8 1 8 2 plimitpl 152 245 0 227 1 0 1 1 0 8 0 sigapl 424 1220 0 1158 8 0 8 8 0 8 0 knotepl 120 33724 0 33677 18 7 11 11 0 8 8 kqueuepl 184 278 0 268 3 2 1 3 0 8 0 pipepl 304 246 0 219 5 2 3 5 0 8 0 fdescpl 448 1171 0 1142 5 1 4 5 0 8 0 filepl 120 8169 0 7950 19 6 13 14 0 8 5 lockfpl 104 304 0 302 1 0 1 1 0 8 0 lockfspl 48 136 0 134 1 0 1 1 0 8 0 sessionpl 144 26 0 18 1 0 1 1 0 8 0 pgrppl 48 40 0 24 1 0 1 1 0 8 0 ucredpl 104 1288 0 1275 1 0 1 1 0 8 0 zombiepl 144 1160 0 1158 1 0 1 1 0 8 0 processpl 1152 1220 0 1158 5 0 5 5 0 8 0 procpl 664 2386 0 2315 7 0 7 7 0 8 0 sosppl 176 6 0 6 2 1 1 1 0 8 1 sockpl 552 2147 0 2112 29 18 11 19 0 8 8 mcl64k 65536 96 0 94 1 0 1 1 0 8 0 mcl9k 9216 2 0 2 2 1 1 1 0 8 1 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 3445 0 3390 14 6 8 14 0 8 0 mcl2k2 2112 3 0 3 2 1 1 1 0 8 1 mcl2k 2048 1466 0 1462 10 8 2 9 0 8 1 mtagpl 96 47 0 16 1 0 1 1 0 8 0 mbufpl 256 14324 0 14165 77 61 16 76 0 8 0 bufpl 280 7820 0 1599 445 0 445 445 0 8 0 anonpl 24 181959 0 178753 59 23 36 57 0 187 6 amapchunkpl 152 31213 0 30705 38 11 27 33 0 158 6 amappl16 200 3304 0 3265 21 15 6 15 0 8 0 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 10 0 10 1 1 0 1 0 8 0 amappl13 176 414 0 413 1 0 1 1 0 8 0 amappl12 168 1527 0 1489 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 53 0 43 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 80 0 78 1 0 1 1 0 8 0 amappl6 120 274 0 263 1 0 1 1 0 8 0 amappl5 112 82 0 73 1 0 1 1 0 8 0 amappl4 104 402 0 377 1 0 1 1 0 8 0 amappl3 96 5484 0 5389 3 0 3 3 0 8 0 amappl2 88 1316 0 1244 2 0 2 2 0 8 0 amappl1 80 13052 0 12508 13 0 13 13 0 8 0 amappl 88 8647 0 8477 5 0 5 5 0 92 0 uvmvnodes 80 124 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 90 0 1 2 0 2 2 0 8 0 uaddrrnd 24 1171 0 1142 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1171 0 1142 1 0 1 1 0 8 0 vmmpekpl 168 11014 0 10973 3 0 3 3 0 8 0 vmmpepl 168 80691 0 78875 96 9 87 93 0 357 5 vmsppl 368 1170 0 1142 4 1 3 4 0 8 0 rwobjpl 40 23031 0 21948 14 0 14 14 0 8 0 pdppl 4096 2352 0 2286 102 34 68 78 0 8 2 pvpl 32 604700 0 596178 136 31 105 132 0 265 18 pmappl 216 1172 0 1142 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 461 0 128 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(ffffffff833688fd) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833a8065,ffffffff8334703b,491,ffffffff8339dd57) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff800000b3d048,22,6000,0) at disk_openpart+0x20d vndopen(e22,7,6000,ffff80003c937cb0) at vndopen+0x222 sys/dev/vnd.c:203 VOP_OPEN(fffffd806aded298,7,fffffd8007bfd5b0,ffff80003c937cb0) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c9d5960,207,e4) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80003c937cb0,ffffff9c,200000000480,206,f6,ffff80003c9d5b00) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c9d5bb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9d5bb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x854f7228cf0, 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(ffffffff833688fd) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833a8065,ffffffff8334703b,491,ffffffff8339dd57) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff800000b3d048,22,6000,0) at disk_openpart+0x20d vndopen(e22,7,6000,ffff80003c937cb0) at vndopen+0x222 sys/dev/vnd.c:203 VOP_OPEN(fffffd806aded298,7,fffffd8007bfd5b0,ffff80003c937cb0) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c9d5960,207,e4) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80003c937cb0,ffffff9c,200000000480,206,f6,ffff80003c9d5b00) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c9d5bb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9d5bb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x854f7228cf0, count: -10