panic: ffs_blkfree: bad size Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *330129 36476 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8343492c) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_blkfree(fffffd806ea3f300,2000700070006,4000) at ffs_blkfree+0xd4c sys/ufs/ffs/ffs_alloc.c:1285 ffs_indirtrunc(fffffd806ea3f300,fffffffffffffff4,133160,ffffffffffffffff,0,ffff80003c933588) at ffs_indirtrunc+0x7ba sys/ufs/ffs/ffs_inode.c:-1 ffs_truncate(fffffd806ea3f300,0,0,ffffffffffffffff) at ffs_truncate+0x1036 sys/ufs/ffs/ffs_inode.c:297 ufs_inactive(ffff80003c9336e0) at ufs_inactive+0x1ff sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd806c7c37b8,ffff80002a78cd10) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c7c37b8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c7c3458,fffffd806c7c37b8,ffff80003c933848) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a78cd10,ffffff9c,7e7e662bb460,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80003c9339b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9339b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7e662bb910, count: 3 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: ffs_blkfree: bad size ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8343492c) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_blkfree(fffffd806ea3f300,2000700070006,4000) at ffs_blkfree+0xd4c sys/ufs/ffs/ffs_alloc.c:1285 ffs_indirtrunc(fffffd806ea3f300,fffffffffffffff4,133160,ffffffffffffffff,0,ffff80003c933588) at ffs_indirtrunc+0x7ba sys/ufs/ffs/ffs_inode.c:-1 ffs_truncate(fffffd806ea3f300,0,0,ffffffffffffffff) at ffs_truncate+0x1036 sys/ufs/ffs/ffs_inode.c:297 ufs_inactive(ffff80003c9336e0) at ufs_inactive+0x1ff sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd806c7c37b8,ffff80002a78cd10) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c7c37b8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c7c3458,fffffd806c7c37b8,ffff80003c933848) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a78cd10,ffffff9c,7e7e662bb460,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80003c9339b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9339b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7e662bb910, count: -12 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c933200 rbx 0x2000700070006 rdx 0 rcx 0 rax 0xffff80002a78cd10 r8 0x101010101010101 r9 0x8080808080808080 r10 0x9bc70cce8fe1c853 r11 0xc1f049421374cd40 r12 0 r13 0xffff800000c47800 r14 0 r15 0x1 rip 0xffffffff826638a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c9331f0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=330129 pid=36476 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a746008,0xffff8000380ef4f0 process=0xffff8000ffff9f98 user=0xffff80003c92e000, vmspace=0xfffffd806cccc2f8 estcpu=36, cpticks=22, pctcpu=0.6, user=2, sys=18, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 90900 270448 28550 0 2 0xc80 syz-executor 90900 292584 28550 0 3 0x4000080 kqread syz-executor 90900 231935 28550 0 3 0x4000080 fsleep syz-executor 2889 439190 35064 0 3 0x80 nanoslp syz-executor 2889 128940 35064 0 3 0x4000080 piperd syz-executor 2889 273144 35064 0 3 0x4000080 fsleep syz-executor 29836 116001 64725 0 2 0xc80 syz-executor 29836 260427 64725 0 3 0x4000080 fsleep syz-executor 29836 338848 64725 0 3 0x4000080 ttyout syz-executor 58 34347 0 0 3 0x14200 acct acct 30770 402484 89109 0 2 0xc80 syz-executor 30770 474928 89109 0 3 0x4000080 rest syz-executor 30770 338721 89109 0 3 0x4000080 fsleep syz-executor 89104 291610 327 0 2 0xc80 syz-executor 89104 451960 327 0 3 0x4000080 ttyout syz-executor 89104 272450 327 0 3 0x4000080 fsleep syz-executor 28550 15822 1874 0 3 0x82 nanoslp syz-executor 22568 396649 1 0 3 0x100083 ttyopn getty 35064 82956 1874 0 2 0xc82 syz-executor 64725 212857 1874 0 2 0xc82 syz-executor *36476 330129 1874 0 7 0x2 syz-executor 85548 362602 1874 0 2 0x2 syz-executor 15004 290026 1874 0 2 0xc82 syz-executor 327 25110 1874 0 2 0xc82 syz-executor 89109 492483 1874 0 2 0xc82 syz-executor 1874 446714 30891 0 3 0x82 kqread syz-executor 30891 109126 56261 0 3 0x10008a sigsusp ksh 56261 103738 1627 0 3 0x98 kqread sshd-session 1627 73424 6203 0 3 0x92 kqread sshd-session 6203 461635 1 0 3 0x88 kqread sshd 91072 492432 53388 73 3 0x1100090 kqread syslogd 53388 394211 1 0 3 0x100082 sbwait syslogd 51634 73685 1 0 3 0x100080 kqread resolvd 78748 106786 90020 77 3 0x100092 kqread dhcpleased 77762 403842 90020 77 3 0x100092 kqread dhcpleased 90020 83345 1 0 3 0x80 kqread dhcpleased 52190 463704 0 0 3 0x14200 bored smr 19910 340565 0 0 2 0x14200 zerothread 45199 92133 0 0 3 0x14200 aiodoned aiodoned 49343 258061 0 0 3 0x14200 syncer update 93007 174530 0 0 3 0x14200 cleaner cleaner 81685 121590 0 0 3 0x14200 reaper reaper 75658 226354 0 0 3 0x14200 pgdaemon pagedaemon 45378 60809 0 0 3 0x14200 bored viomb 9269 95467 0 0 3 0x40014200 acpi0 acpi0 14841 7257 0 0 2 0x14200 softnet0 52551 273302 0 0 3 0x14200 bored systqmp 4096 210809 0 0 3 0x14200 bored systq 22416 15375 0 0 3 0x40014200 tmoslp softclock 24488 42111 0 0 3 0x40014200 idle0 1 221060 0 0 3 0x80082 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 11074 12179K 12598K 166960K 14124 0 pcb 17 15K 16K 166960K 329 0 rtable 265 12K 12K 166960K 690 0 pf 34 13K 16K 166960K 134 0 ifaddr 43 7K 8K 166960K 106 0 ifgroup 52 2K 2K 166960K 172 0 sysctl 4 1K 9K 166960K 21 0 counters 34 17K 18K 166960K 95 0 ioctlops 0 0K 4K 166960K 469 0 iov 0 0K 16K 166960K 110 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1384 87K 88K 166960K 2864 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 118 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 236K 166960K 1253 0 sigio 0 0K 0K 166960K 24 0 proc 60 59K 91K 166960K 730 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 196 0 in_multi 95 6K 7K 166960K 184 0 ether_multi 1 0K 0K 166960K 11 0 mrt 2 0K 0K 166960K 27 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 593 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 159K 181K 166960K 12473 0 UVM aobj 49 32K 32K 166960K 54 0 pinsyscall 37 74K 90K 166960K 2439 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 85 0 NDP 12 0K 2K 166960K 75 0 temp 85 9076K 9145K 166960K 35466 0 kqueue 14 22K 32K 166960K 212 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 120 136 0 133 1 0 1 1 0 8 0 rtentry 136 181 0 78 4 0 4 4 0 8 0 unpcb 144 1036 0 1020 10 1 9 9 0 8 8 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 573 0 568 13 6 7 7 0 8 6 arp 96 31 0 10 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 1550 0 1538 16 7 9 9 0 8 8 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 37 0 15 1 0 1 1 0 8 0 pkpcb 40 12 0 12 3 2 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1072 47 0 47 3 2 1 1 0 8 1 pppxif 1416 1 0 1 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 7 0 0 1 0 1 1 0 482 0 pffrnode 88 7 0 0 1 0 1 1 0 8 0 pffrent 40 8 0 1 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstkey 128 1 0 1 1 1 0 1 0 8 0 pfstate 384 1 0 1 1 1 0 1 0 8 0 pfrule 1360 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 6 0 0 6 0 6 6 0 8 0 art_heap4 256 716 0 292 32 5 27 29 0 8 0 art_table 40 722 0 292 5 0 5 5 0 8 0 art_node 32 178 0 85 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 3 2 1 1 0 8 0 semapl 112 113 0 103 1 0 1 1 0 8 0 shmpl 112 38 0 4 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3954 0 2496 92 0 92 92 0 8 0 ffsino 256 3954 0 2496 92 0 92 92 0 8 0 nchpl 144 5631 0 3929 64 0 64 64 0 8 0 rtmask 32 13 0 13 2 1 1 1 0 8 1 vnodes 216 4770 0 0 265 0 265 265 0 8 0 namei 1024 20359 0 20359 4 3 1 2 0 8 1 vcpupl 3904 13 0 1 2 0 2 2 0 8 0 vmpool 808 13 0 1 2 0 2 2 0 8 0 kstatmem 264 102 0 78 2 0 2 2 0 8 0 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 17644 0 17644 11 3 8 8 1 8 8 plimitpl 152 461 0 441 1 0 1 1 0 8 0 sigapl 424 1534 0 1492 7 1 6 6 0 8 1 knotepl 120 48288 0 48234 35 21 14 17 0 8 8 kqueuepl 184 404 0 393 1 0 1 1 0 8 0 pipepl 304 368 0 340 10 0 10 10 0 8 7 fdescpl 448 1512 0 1484 4 0 4 4 0 8 0 filepl 120 11331 0 11099 18 3 15 15 0 8 7 lockfpl 104 944 0 942 3 1 2 2 0 8 1 lockfspl 48 383 0 381 1 0 1 1 0 8 0 sessionpl 144 27 0 19 1 0 1 1 0 8 0 pgrppl 48 85 0 69 1 0 1 1 0 8 0 ucredpl 104 2515 0 2503 1 0 1 1 0 8 0 zombiepl 144 1493 0 1492 1 0 1 1 0 8 0 processpl 1152 1534 0 1492 4 0 4 4 0 8 0 procpl 664 3131 0 3079 7 1 6 6 0 8 0 sosppl 176 6 0 6 2 1 1 1 0 8 1 sockpl 552 2909 0 2878 24 13 11 19 0 8 8 mcl64k 65536 319 0 319 3 2 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 16 0 16 3 2 1 1 0 8 1 mcl4k 4096 3887 0 3828 17 8 9 16 0 8 1 mcl2k 2048 1345 0 1339 6 4 2 4 0 8 1 mtagpl 96 65 0 15 2 0 2 2 0 8 0 mbufpl 256 22193 0 21982 91 63 28 74 0 8 8 bufpl 280 5113 0 108 358 0 358 358 0 8 0 anonpl 24 218037 0 214751 67 20 47 47 0 187 17 amapchunkpl 152 42454 0 41964 46 17 29 31 0 158 5 amappl16 200 3617 0 3584 28 16 12 16 0 8 8 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 461 0 460 1 0 1 1 0 8 0 amappl13 176 121 0 111 1 0 1 1 0 8 0 amappl12 168 1767 0 1740 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 71 0 61 1 0 1 1 0 8 0 amappl9 144 259 0 259 1 1 0 1 0 8 0 amappl8 136 116 0 114 1 0 1 1 0 8 0 amappl7 128 157 0 146 1 0 1 1 0 8 0 amappl6 120 191 0 189 1 0 1 1 0 8 0 amappl5 112 104 0 96 1 0 1 1 0 8 0 amappl4 104 283 0 268 1 0 1 1 0 8 0 amappl3 96 8472 0 8361 5 1 4 4 0 8 0 amappl2 88 552 0 498 2 0 2 2 0 8 0 amappl1 80 14329 0 13785 16 1 15 15 0 8 2 amappl 88 11521 0 11358 5 0 5 5 0 92 0 uvmvnodes 80 127 0 0 3 0 3 3 0 8 0 dma32768 32768 1 0 1 1 1 0 1 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 53 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1512 0 1484 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1512 0 1484 1 0 1 1 0 8 0 vmmpekpl 168 12968 0 12917 3 0 3 3 0 8 0 vmmpepl 168 99203 0 97453 104 12 92 92 0 357 8 vmsppl 368 1511 0 1484 4 1 3 4 0 8 0 rwobjpl 40 26662 0 25628 15 2 13 13 0 8 2 pdppl 4096 3056 0 2982 115 36 79 79 0 8 5 pvpl 32 648259 0 638426 152 35 117 117 0 265 29 pmappl 216 1524 0 1485 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 494 0 135 14 2 12 12 0 8 1 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8343492c) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_blkfree(fffffd806ea3f300,2000700070006,4000) at ffs_blkfree+0xd4c sys/ufs/ffs/ffs_alloc.c:1285 ffs_indirtrunc(fffffd806ea3f300,fffffffffffffff4,133160,ffffffffffffffff,0,ffff80003c933588) at ffs_indirtrunc+0x7ba sys/ufs/ffs/ffs_inode.c:-1 ffs_truncate(fffffd806ea3f300,0,0,ffffffffffffffff) at ffs_truncate+0x1036 sys/ufs/ffs/ffs_inode.c:297 ufs_inactive(ffff80003c9336e0) at ufs_inactive+0x1ff sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd806c7c37b8,ffff80002a78cd10) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c7c37b8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c7c3458,fffffd806c7c37b8,ffff80003c933848) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a78cd10,ffffff9c,7e7e662bb460,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80003c9339b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9339b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7e662bb910, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8343492c) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_blkfree(fffffd806ea3f300,2000700070006,4000) at ffs_blkfree+0xd4c sys/ufs/ffs/ffs_alloc.c:1285 ffs_indirtrunc(fffffd806ea3f300,fffffffffffffff4,133160,ffffffffffffffff,0,ffff80003c933588) at ffs_indirtrunc+0x7ba sys/ufs/ffs/ffs_inode.c:-1 ffs_truncate(fffffd806ea3f300,0,0,ffffffffffffffff) at ffs_truncate+0x1036 sys/ufs/ffs/ffs_inode.c:297 ufs_inactive(ffff80003c9336e0) at ufs_inactive+0x1ff sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd806c7c37b8,ffff80002a78cd10) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c7c37b8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c7c3458,fffffd806c7c37b8,ffff80003c933848) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a78cd10,ffffff9c,7e7e662bb460,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80003c9339b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9339b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7e662bb910, count: -12