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 * 13294 54143 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(ffff800000025c48,12,2000,1) at disk_openpart+0x20d sdopen(d12,1,2000,ffff80002a7cd770) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff80003c96da38) at spec_open+0x2d6 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806244b2a0,1,fffffd8007bfd6e8,ffff80002a7cd770) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c96dc80,1,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002a7cd770,ffffff9c,200000000540,0,0,ffff80003c96de20) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c96ded0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96ded0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9b8a44439d0, count: 4 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(ffff800000025c48,12,2000,1) at disk_openpart+0x20d sdopen(d12,1,2000,ffff80002a7cd770) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff80003c96da38) at spec_open+0x2d6 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806244b2a0,1,fffffd8007bfd6e8,ffff80002a7cd770) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c96dc80,1,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002a7cd770,ffffff9c,200000000540,0,0,ffff80003c96de20) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c96ded0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96ded0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9b8a44439d0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c96d810 rbx 0xffff800000025c48 rdx 0xffff800001478ac0 rcx 0 rax 0xffff80002a7cd770 r8 0x101010101010101 r9 0x8080808080808080 r10 0x5cdc27f2be4d0772 r11 0x9f366cbdfdd18cbc r12 0 r13 0x1 r14 0 r15 0x1 rip 0xffffffff81666de5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c96d800 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=13294 pid=54143 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7cd4d8,0xffff80003c94a2c8 process=0xffff8000ffffa898 user=0xffff80003c968000, vmspace=0xfffffd806cb0ad00 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 58235 198410 14331 0 2 0 syz-executor 58235 97453 14331 0 3 0x4000080 ttyretype syz-executor 54143 476419 51348 0 2 0 syz-executor *54143 13294 51348 0 7 0x4000000 syz-executor 94607 182887 58077 0 2 0 syz-executor 94607 390440 58077 0 3 0x4000080 fsleep syz-executor 94607 86233 58077 0 3 0x4000080 fsleep syz-executor 22912 71775 42850 0 2 0 syz-executor 22912 471969 42850 0 3 0x4000080 kqsel syz-executor 22912 53729 42850 0 2 0x4000000 syz-executor 51348 155990 83274 0 2 0xc82 syz-executor 42850 11758 83274 0 3 0x82 nanoslp syz-executor 29563 180199 83274 0 2 0x2 syz-executor 58077 389208 83274 0 2 0xc82 syz-executor 20543 222745 83274 0 3 0x82 wait syz-executor 14331 254209 83274 0 2 0xc82 syz-executor 78789 328592 83274 0 2 0x2 syz-executor 93507 403145 83274 0 2 0x2 syz-executor 83274 296082 93797 0 3 0x82 kqread syz-executor 93797 33573 7708 0 3 0x10008a sigsusp ksh 7708 411369 86406 0 3 0x98 kqread sshd-session 86406 503200 97806 0 3 0x92 kqread sshd-session 86747 146420 1 0 3 0x100083 ttyin getty 97806 18601 1 0 3 0x88 kqread sshd 3961 198574 70811 73 3 0x1100090 kqread syslogd 70811 44523 1 0 3 0x100082 sbwait syslogd 94550 268473 1 0 3 0x100080 kqread resolvd 97087 71720 74863 77 3 0x100092 kqread dhcpleased 22713 336173 74863 77 3 0x100092 kqread dhcpleased 74863 179383 1 0 3 0x80 kqread dhcpleased 64105 168387 0 0 3 0x14200 bored smr 45564 397692 0 0 2 0x14200 zerothread 55598 222529 0 0 3 0x14200 aiodoned aiodoned 30957 280554 0 0 3 0x14200 syncer update 19553 481905 0 0 3 0x14200 cleaner cleaner 73555 62601 0 0 3 0x14200 reaper reaper 11396 326748 0 0 3 0x14200 pgdaemon pagedaemon 8526 287072 0 0 3 0x14200 bored viomb 81179 171785 0 0 3 0x40014200 acpi0 acpi0 66738 136096 0 0 2 0x14200 softnet0 25304 324055 0 0 3 0x14200 bored systqmp 4561 66621 0 0 3 0x14200 bored systq 74510 181455 0 0 3 0x40014200 tmoslp softclock 33513 470050 0 0 3 0x40014200 idle0 1 149395 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10175 11047K 11437K 166960K 11910 0 pcb 17 12K 12K 166960K 136 0 rtable 221 7K 8K 166960K 438 0 pf 34 13K 16K 166960K 84 0 ifaddr 42 7K 8K 166960K 78 0 ifgroup 53 2K 2K 166960K 104 0 sysctl 3 1K 9K 166960K 8 0 counters 33 17K 18K 166960K 70 0 ioctlops 0 0K 4K 166960K 148 0 iov 0 0K 13K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1344 85K 85K 166960K 1725 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 93K 166960K 550 0 sigio 0 0K 0K 166960K 2 0 proc 60 59K 100K 166960K 545 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 185 0 in_multi 88 6K 7K 166960K 123 0 ether_multi 1 0K 0K 166960K 5 0 mrt 2 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 385 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 215 150K 160K 166960K 6109 0 UVM aobj 13 4K 4K 166960K 13 0 pinsyscall 36 72K 94K 166960K 1649 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 52 0 temp 41 8647K 8711K 166960K 11366 0 kqueue 15 24K 28K 166960K 77 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 63 0 60 1 0 1 1 0 8 0 rtentry 136 139 0 40 4 0 4 4 0 8 0 unpcb 144 203 0 186 1 0 1 1 0 8 0 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 123 0 118 2 0 2 2 0 8 1 arp 96 23 0 5 1 0 1 1 0 8 0 inpcb 328 400 0 392 2 0 2 2 0 8 1 ip6q 72 2 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 112 31 0 6 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 35 0 34 1 0 1 1 0 8 0 pfstscr 40 10 0 9 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 22 0 20 1 0 1 1 0 8 0 pfstate 384 11 0 10 1 0 1 1 0 8 0 pfrule 1344 4 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 567 0 154 29 0 29 29 0 8 2 art_table 40 568 0 154 5 0 5 5 0 8 0 art_node 32 139 0 53 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 8 0 2 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2379 0 876 95 0 95 95 0 8 0 ffsino 256 2379 0 876 95 0 95 95 0 8 0 nchpl 144 3014 0 1320 64 0 64 64 0 8 0 rtmask 32 12 0 12 1 0 1 1 0 8 1 vnodes 216 2636 0 0 147 0 147 147 0 8 0 namei 1024 9154 0 9152 1 0 1 1 0 8 0 kstatmem 264 68 0 44 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 9250 0 9250 3 2 1 3 1 8 1 plimitpl 152 68 0 51 1 0 1 1 0 8 0 sigapl 424 835 0 795 6 1 5 6 0 8 0 knotepl 120 14763 0 14711 9 0 9 9 0 8 7 kqueuepl 184 117 0 104 1 0 1 1 0 8 0 pipepl 304 168 0 141 5 0 5 5 0 8 2 fdescpl 448 822 0 795 5 1 4 5 0 8 0 filepl 120 3559 0 3346 10 0 10 10 0 8 2 lockfpl 104 152 0 150 1 0 1 1 0 8 0 lockfspl 48 73 0 71 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 37 0 21 1 0 1 1 0 8 0 ucredpl 104 365 0 354 1 0 1 1 0 8 0 zombiepl 144 796 0 795 1 0 1 1 0 8 0 processpl 1152 835 0 795 4 0 4 4 0 8 0 procpl 664 1326 0 1280 5 0 5 5 0 8 0 sosppl 176 5 0 5 1 0 1 1 0 8 1 sockpl 552 676 0 648 4 0 4 4 0 8 1 mcl64k 65536 29 0 28 2 1 1 1 0 8 0 mcl16k 16384 19 0 19 1 0 1 1 0 8 1 mcl12k 12288 3 0 3 1 0 1 1 0 8 1 mcl9k 9216 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 43 0 43 2 1 1 1 0 8 1 mcl4k 4096 3151 0 3095 14 6 8 14 0 8 1 mcl2k2 2112 3 0 3 1 0 1 1 0 8 1 mcl2k 2048 714 0 712 2 0 2 2 0 8 1 mtagpl 96 9 0 4 2 1 1 1 0 8 0 mbufpl 256 8443 0 8315 14 1 13 13 0 8 1 bufpl 280 2931 0 128 201 0 201 201 0 8 0 anonpl 24 131371 0 128327 35 4 31 31 0 187 9 amapchunkpl 152 19121 0 18685 22 0 22 22 0 158 2 amappl16 200 2279 0 2247 7 4 3 5 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 9 0 9 2 1 1 1 0 8 1 amappl13 176 439 0 438 1 0 1 1 0 8 0 amappl12 168 1169 0 1133 2 0 2 2 0 8 0 amappl11 160 47 0 47 1 1 0 1 0 8 0 amappl10 152 44 0 34 1 0 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 21 0 20 1 0 1 1 0 8 0 amappl7 128 85 0 84 1 0 1 1 0 8 0 amappl6 120 290 0 279 1 0 1 1 0 8 0 amappl5 112 71 0 64 1 0 1 1 0 8 0 amappl4 104 385 0 362 1 0 1 1 0 8 0 amappl3 96 3393 0 3313 3 0 3 3 0 8 0 amappl2 88 936 0 867 2 0 2 2 0 8 0 amappl1 80 10775 0 10244 13 0 13 13 0 8 0 amappl 88 5359 0 5211 5 0 5 5 0 92 0 uvmvnodes 80 102 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 dma256 256 8 0 8 2 1 1 1 0 8 1 dma128 128 254 0 254 2 1 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 822 0 795 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 822 0 795 1 0 1 1 0 8 0 vmmpekpl 168 7623 0 7585 2 0 2 2 0 8 0 vmmpepl 168 58048 0 56364 89 1 88 88 0 357 7 vmsppl 368 821 0 795 4 1 3 4 0 8 0 rwobjpl 40 17521 0 16576 12 1 11 11 0 8 0 pdppl 4096 1650 0 1590 98 32 66 80 0 8 6 pvpl 32 356681 0 348300 90 0 90 90 0 265 11 pmappl 216 821 0 795 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 374 0 46 10 0 10 10 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(ffff800000025c48,12,2000,1) at disk_openpart+0x20d sdopen(d12,1,2000,ffff80002a7cd770) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff80003c96da38) at spec_open+0x2d6 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806244b2a0,1,fffffd8007bfd6e8,ffff80002a7cd770) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c96dc80,1,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002a7cd770,ffffff9c,200000000540,0,0,ffff80003c96de20) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c96ded0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96ded0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9b8a44439d0, count: -11 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(ffff800000025c48,12,2000,1) at disk_openpart+0x20d sdopen(d12,1,2000,ffff80002a7cd770) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff80003c96da38) at spec_open+0x2d6 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806244b2a0,1,fffffd8007bfd6e8,ffff80002a7cd770) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c96dc80,1,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002a7cd770,ffffff9c,200000000540,0,0,ffff80003c96de20) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c96ded0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96ded0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9b8a44439d0, count: -11