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 *358921 34647 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(ffff800000025c48,12,2000,1) at disk_openpart+0x20d sdopen(d12,9,2000,ffff80002dcf0d10) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff800035d0f638) at spec_open+0x2d6 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806de8bb58,9,fffffd8007bfd618,ffff80002dcf0d10) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff800035d0f880,9,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002dcf0d10,ffffff9c,200000000180,8,0,ffff800035d0fa20) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff800035d0fad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d0fad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc2e0b690a90, 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(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(ffff800000025c48,12,2000,1) at disk_openpart+0x20d sdopen(d12,9,2000,ffff80002dcf0d10) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff800035d0f638) at spec_open+0x2d6 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806de8bb58,9,fffffd8007bfd618,ffff80002dcf0d10) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff800035d0f880,9,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002dcf0d10,ffffff9c,200000000180,8,0,ffff800035d0fa20) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff800035d0fad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d0fad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc2e0b690a90, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800035d0f410 rbx 0xffff800000025c48 rdx 0xffff80000142c580 rcx 0 rax 0xffff80002dcf0d10 r8 0x101010101010101 r9 0x8080808080808080 r10 0xbd32694df31f4dfb r11 0xbed091ec120b62ff r12 0 r13 0x1 r14 0 r15 0x1 rip 0xffffffff819f7bb5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800035d0f400 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=358921 pid=34647 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=0xffff80002dcf14d8,0xffffffff83998d40 process=0xffff8000ffff9698 user=0xffff800035d0a000, vmspace=0xfffffd8062ee7190 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 34647 129250 24444 0 2 0 syz-executor *34647 358921 24444 0 7 0x4000000 syz-executor 6609 189357 10369 0 3 0x80 nanoslp syz-executor 6609 280802 10369 0 3 0x4000080 sysctllk syz-executor 6609 183504 10369 0 3 0x4000080 fsleep syz-executor 39894 136835 51824 0 3 0x80 nanoslp syz-executor 39894 11436 51824 0 3 0x4000080 sysctllk syz-executor 39894 7431 51824 0 3 0x4000080 fsleep syz-executor 92804 346765 90585 0 3 0x80 nanoslp syz-executor 92804 488386 90585 0 3 0x4000080 sysctllk syz-executor 92804 346459 90585 0 3 0x4000080 fsleep syz-executor 51822 343157 8504 0 3 0x80 nanoslp syz-executor 51822 192172 8504 0 3 0x4000080 ttyin syz-executor 51822 514117 8504 0 3 0x4000080 fsleep syz-executor 81863 149059 0 0 3 0x14200 acct acct 93551 441815 1 0 3 0x82 sysctllk getty 68238 198814 71714 0 3 0x82 sysctllk sshd-session 18744 399995 71714 0 3 0x82 sysctllk sshd-session 76456 108464 51486 0 3 0x82 sysctllk syz-executor 19593 290385 71714 0 3 0x82 sysctllk sshd-session 23360 382336 71714 0 3 0x82 sysctllk sshd-session 49164 507794 51486 0 3 0x82 sysctllk syz-executor 3226 160105 71714 0 3 0x82 sysctllk sshd-session 69007 90934 1 0 3 0 vmmapbsy syz-executor 69007 328965 1 0 3 0x4000000 vmmapbsy syz-executor 69007 161719 1 0 2 0x4000c00 syz-executor 69007 125498 1 0 3 0x4000080 pipeiolk syz-executor 69007 163028 1 0 3 0x4000000 pipecl syz-executor 69007 218579 1 0 2 0x4000c00 syz-executor 90585 438713 51486 0 2 0xc82 syz-executor 8504 316453 51486 0 3 0x82 nanoslp syz-executor 51824 166455 51486 0 2 0xc82 syz-executor 10369 211698 51486 0 2 0xc82 syz-executor 56637 405096 51486 0 2 0x2 syz-executor 24444 195457 51486 0 2 0xc82 syz-executor 51486 469832 45975 0 3 0x82 kqread syz-executor 45975 136794 48771 0 3 0x10008a sigsusp ksh 48771 162600 44325 0 3 0x98 kqread sshd-session 44325 333105 71714 0 3 0x92 kqread sshd-session 71714 164137 1 0 3 0x88 kqread sshd 65567 426242 75894 73 3 0x1100090 kqread syslogd 75894 385797 1 0 3 0x100082 sbwait syslogd 38892 386619 1 0 3 0x100080 kqread resolvd 6041 32948 42865 77 3 0x100092 kqread dhcpleased 4257 140645 42865 77 3 0x100092 kqread dhcpleased 42865 73877 1 0 3 0x80 kqread dhcpleased 18194 393577 0 0 3 0x14200 bored smr 9252 124772 0 0 2 0x14200 zerothread 56753 491525 0 0 3 0x14200 aiodoned aiodoned 65262 407802 0 0 3 0x14200 syncer update 1085 514649 0 0 3 0x14200 cleaner cleaner 63578 223939 0 0 3 0x14200 reaper reaper 84204 81060 0 0 3 0x14200 pgdaemon pagedaemon 15775 168 0 0 3 0x14200 bored viomb 97808 193744 0 0 3 0x40014200 acpi0 acpi0 99831 413784 0 0 3 0x14200 bored softnet0 36138 321284 0 0 3 0x14200 bored systqmp 47264 105757 0 0 3 0x14200 bored systq 73580 257267 0 0 3 0x40014200 tmoslp softclock 88974 29012 0 0 3 0x40014200 idle0 1 443513 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 10205 11054K 11559K 166960K 12859 0 pcb 17 14K 16K 166960K 291 0 rtable 155 7K 8K 166960K 467 0 pf 34 13K 20K 166960K 136 0 ifaddr 33 5K 8K 166960K 83 0 ifgroup 54 2K 2K 166960K 137 0 sysctl 3 1K 9K 166960K 11 0 counters 33 17K 18K 166960K 199 0 ioctlops 0 0K 4K 166960K 360 0 iov 0 0K 16K 166960K 73 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1456 91K 92K 166960K 2308 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 22 2K 2K 166960K 131 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 51K 81K 166960K 882 0 sigio 0 0K 0K 166960K 24 0 proc 54 58K 91K 166960K 545 0 subproc 63 3K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 89 0 in_multi 64 4K 7K 166960K 131 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 489 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 266 141K 160K 166960K 10024 0 UVM aobj 28 12K 12K 166960K 32 0 pinsyscall 47 94K 96K 166960K 2003 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 28 0 NDP 12 0K 1K 166960K 56 0 temp 57 8659K 8725K 166960K 31006 0 kqueue 13 20K 29K 166960K 144 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 136 127 0 73 4 0 4 4 0 8 0 unpcb 144 719 0 694 7 4 3 6 0 8 1 syncache 336 12 0 12 2 1 1 1 0 8 1 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 736 275 0 258 4 2 2 4 0 8 0 arp 96 19 0 10 1 0 1 1 0 8 0 ipq 40 6 0 0 1 0 1 1 0 8 0 ipqe 40 8 0 1 1 0 1 1 0 8 0 inpcb 328 695 0 674 8 5 3 7 0 8 1 ip6q 72 7 0 4 1 0 1 1 0 8 0 ip6af 40 12 0 8 1 0 1 1 0 8 0 nd6 112 30 0 18 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 8 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 156 0 156 1 0 1 1 0 8 1 pppxif 1384 1 0 1 1 1 0 1 0 8 0 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1344 7 0 7 1 0 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 256 538 0 276 31 5 26 31 0 8 4 art_table 40 540 0 276 5 0 5 5 0 8 0 art_node 32 125 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 7 1 0 1 1 0 8 0 semupl 112 4 0 4 2 1 1 1 0 8 1 semapl 112 126 0 106 1 0 1 1 0 8 0 shmpl 112 24 0 3 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3064 0 1565 95 0 95 95 0 8 0 ffsino 256 3064 0 1565 95 0 95 95 0 8 0 nchpl 144 4314 0 2620 64 0 64 64 0 8 0 rtmask 32 8 0 8 1 1 0 1 0 8 0 vnodes 216 3729 0 0 208 0 208 208 0 8 0 namei 1024 14860 0 14859 2 1 1 1 0 8 0 vcpupl 3904 4 0 0 1 0 1 1 0 8 0 vmpool 800 5 0 1 1 0 1 1 0 8 0 kstatmem 264 80 0 56 2 0 2 2 0 8 0 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 16816 0 16816 15 7 8 8 1 8 8 plimitpl 152 199 0 182 1 0 1 1 0 8 0 sigapl 424 1181 0 1134 6 0 6 6 0 8 0 knotepl 120 55077 0 55025 36 26 10 23 0 8 7 kqueuepl 184 333 0 324 5 1 4 4 0 8 3 pipepl 304 219 0 190 6 3 3 6 0 8 0 fdescpl 448 1166 0 1133 4 0 4 4 0 8 0 filepl 120 7532 0 7309 14 1 13 13 0 8 3 lockfpl 104 625 0 623 3 1 2 2 0 8 1 lockfspl 48 175 0 173 1 0 1 1 0 8 0 sessionpl 144 28 0 16 1 0 1 1 0 8 0 pgrppl 48 58 0 37 1 0 1 1 0 8 0 ucredpl 104 1189 0 1178 1 0 1 1 0 8 0 zombiepl 144 1134 0 1134 1 0 1 1 0 8 1 processpl 1152 1181 0 1134 4 0 4 4 0 8 0 procpl 664 2458 0 2397 6 0 6 6 0 8 0 sosppl 176 5 0 5 1 1 0 1 0 8 0 sockpl 552 1739 0 1690 16 9 7 14 0 8 2 mcl64k 65536 469 0 468 1 0 1 1 0 8 0 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 12 0 11 1 0 1 1 0 8 0 mcl4k 4096 3483 0 3416 15 5 10 14 0 8 0 mcl2k 2048 1343 0 1338 2 0 2 2 0 8 0 mtagpl 96 156 0 124 2 0 2 2 0 8 0 mbufpl 256 13991 0 13809 22 2 20 20 0 8 3 bufpl 280 7601 0 1380 445 0 445 445 0 8 0 anonpl 24 188719 0 182259 98 33 65 74 0 187 22 amapchunkpl 152 32022 0 31540 38 7 31 31 0 158 11 amappl16 200 3606 0 3397 44 24 20 24 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 7 0 7 1 1 0 1 0 8 0 amappl13 176 421 0 420 1 0 1 1 0 8 0 amappl12 168 1525 0 1486 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 43 0 32 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 80 0 78 1 0 1 1 0 8 0 amappl6 120 271 0 254 1 0 1 1 0 8 0 amappl5 112 78 0 64 1 0 1 1 0 8 0 amappl4 104 408 0 379 1 0 1 1 0 8 0 amappl3 96 5575 0 5490 3 0 3 3 0 8 0 amappl2 88 1345 0 1250 3 0 3 3 0 8 0 amappl1 80 12900 0 12225 15 0 15 15 0 8 0 amappl 88 9198 0 9028 5 0 5 5 0 92 0 uvmvnodes 80 137 0 0 3 0 3 3 0 8 0 dma4096 4096 2 0 2 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 31 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1166 0 1133 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1166 0 1133 1 0 1 1 0 8 0 vmmpekpl 168 11041 0 10994 3 0 3 3 0 8 0 vmmpepl 168 80777 0 78545 118 7 111 111 0 357 10 vmsppl 368 1165 0 1133 5 1 4 4 0 8 0 rwobjpl 40 23543 0 22155 19 2 17 17 0 8 2 pdppl 4096 2348 0 2272 104 26 78 78 0 8 2 pvpl 32 515701 0 502154 213 50 163 163 0 265 48 pmappl 216 1170 0 1134 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 393 0 46 11 0 11 11 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(ffff800000025c48,12,2000,1) at disk_openpart+0x20d sdopen(d12,9,2000,ffff80002dcf0d10) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff800035d0f638) at spec_open+0x2d6 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806de8bb58,9,fffffd8007bfd618,ffff80002dcf0d10) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff800035d0f880,9,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002dcf0d10,ffffff9c,200000000180,8,0,ffff800035d0fa20) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff800035d0fad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d0fad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc2e0b690a90, 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(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(ffff800000025c48,12,2000,1) at disk_openpart+0x20d sdopen(d12,9,2000,ffff80002dcf0d10) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff800035d0f638) at spec_open+0x2d6 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806de8bb58,9,fffffd8007bfd618,ffff80002dcf0d10) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff800035d0f880,9,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002dcf0d10,ffffff9c,200000000180,8,0,ffff800035d0fa20) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff800035d0fad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800035d0fad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc2e0b690a90, count: -11