load: 1.88 cmd: load: 1.88 cmd: getty 27230 [ttyload: 1.88 cmd: panic: pool_do_get: semapl free list modified: page 0xfffffd8067ac0000; item addr 0xfffffd8067ac0690; offset 0x10=0xdeadbe00 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 337934 83612 0 0 0 0 syz-executor.1 * 62276 83612 0 0 0x4000000 1K syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82603660) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82baa760,9,ffff800029620578) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82baa760,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 sys_semget(ffff8000ffff4d28,ffff800029620678,ffff8000296206c0) at sys_semget+0x259 sys/kern/sysv_sem.c:428 syscall(ffff800029620740) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800029620740) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd08e1dff050, count: 8 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: pool_do_get: semapl free list modified: page 0xfffffd8067ac0000; item addr 0xfffffd8067ac0690; offset 0x10=0xdeadbe00 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82603660) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82baa760,9,ffff800029620578) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82baa760,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 sys_semget(ffff8000ffff4d28,ffff800029620678,ffff8000296206c0) at sys_semget+0x259 sys/kern/sysv_sem.c:428 syscall(ffff800029620740) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800029620740) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd08e1dff050, count: -7 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000296203c0 rbx 0xffff800020dd9b97 rdx 0 rcx 0 rax 0xffff8000ffff4d28 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd89b57959d7db507 r11 0x3d166341f91092b2 r12 0xffff800020dd9998 r13 0 r14 0 r15 0x1 rip 0xffffffff813ddc48 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000296203b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=62276 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff5ce8,0xffff8000ffff47f8 process=0xffff8000ffff3a48 user=0xffff80002961b000, vmspace=0xfffffd80660dc468 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80958 231484 41860 0 2 0 syz-executor.4 42048 521600 93837 0 2 0 syz-executor.6 83612 337934 64803 0 7 0 syz-executor.1 *83612 62276 64803 0 7 0x4000000 syz-executor.1 83612 182905 64803 0 3 0x4000080 fsleep syz-executor.1 83612 392615 64803 0 2 0x4000000 syz-executor.1 51784 40937 31066 0 2 0 syz-executor.2 51784 425970 31066 0 3 0x4000080 netcon2 syz-executor.2 88363 335104 97842 0 2 0 syz-executor.7 88363 424728 97842 0 2 0x4000000 syz-executor.7 88363 246718 97842 0 3 0x4000080 fsleep syz-executor.7 66491 73883 65792 0 2 0 syz-executor.0 66491 436658 65792 0 3 0x4000080 semwait syz-executor.0 98625 454581 0 0 3 0x14200 bored sosplice 97842 133040 91207 0 3 0x82 nanoslp syz-executor.7 74990 138530 91207 0 2 0x2 syz-executor.5 93837 149357 91207 0 3 0x82 nanoslp syz-executor.6 41860 524221 91207 0 3 0x82 nanoslp syz-executor.4 90242 96558 91207 0 2 0x2 syz-executor.3 31066 300539 91207 0 3 0x82 nanoslp syz-executor.2 64803 478511 91207 0 3 0x82 nanoslp syz-executor.1 65792 336183 91207 0 3 0x82 nanoslp syz-executor.0 91207 24006 55797 0 3 0x82 wait syz-fuzzer 91207 472805 55797 0 3 0x4000082 nanoslp syz-fuzzer 91207 213258 55797 0 3 0x4000082 thrsleep syz-fuzzer 91207 361838 55797 0 3 0x4000082 wait syz-fuzzer 91207 63316 55797 0 3 0x4000082 thrsleep syz-fuzzer 91207 499737 55797 0 3 0x4000082 wait syz-fuzzer 91207 104499 55797 0 3 0x4000082 wait syz-fuzzer 91207 489065 55797 0 3 0x4000082 wait syz-fuzzer 91207 156442 55797 0 3 0x4000082 thrsleep syz-fuzzer 91207 45593 55797 0 3 0x4000082 wait syz-fuzzer 91207 168051 55797 0 3 0x4000082 nanoslp syz-fuzzer 91207 358391 55797 0 3 0x4000082 wait syz-fuzzer 91207 3998 55797 0 3 0x4000082 wait syz-fuzzer 91207 31087 55797 0 3 0x4000082 thrsleep syz-fuzzer 91207 44856 55797 0 3 0x4000082 kqread syz-fuzzer 55797 404584 5435 0 3 0x10008a sigsusp ksh 5435 126608 5645 0 3 0x9a kqread sshd 27230 105474 1 0 3 0x100083 ttyin getty 5645 484808 1 0 3 0x88 kqread sshd 27535 273301 58113 74 3 0x1100092 bpf pflogd 58113 479254 1 0 3 0x80 netio pflogd 51354 98049 40545 73 3 0x1100090 kqread syslogd 40545 481954 1 0 3 0x100082 netio syslogd 51669 250307 1 0 3 0x100080 kqread resolvd 88556 378548 33003 77 3 0x100092 kqread dhcpleased 50406 158829 33003 77 3 0x100092 kqread dhcpleased 33003 57388 1 0 3 0x80 kqread dhcpleased 1748 497189 0 0 3 0x14200 bored smr 40255 181742 0 0 2 0x14200 zerothread 75244 79150 0 0 3 0x14200 aiodoned aiodoned 91772 294230 0 0 3 0x14200 syncer update 25938 131465 0 0 3 0x14200 cleaner cleaner 49421 160896 0 0 3 0x14200 reaper reaper 67672 382548 0 0 3 0x14200 pgdaemon pagedaemon 47969 378776 0 0 3 0x14200 bored viomb 20713 425297 0 0 3 0x40014200 acpi0 acpi0 26742 480473 0 0 3 0x40014200 idle1 57366 264996 0 0 3 0x14200 bored softnet 19967 308262 0 0 3 0x14200 bored softnet 47490 211504 0 0 3 0x14200 bored softnet 29914 421962 0 0 3 0x14200 bored softnet 66552 262 0 0 3 0x14200 bored systqmp 72065 507978 0 0 3 0x14200 bored systq 11355 155840 0 0 3 0x40014200 bored softclock 38206 107016 0 0 3 0x40014200 idle0 1 65024 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex semapl r = 0 (0xffffffff82baa770) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 sys_semget+0x259 sys/kern/sysv_sem.c:428 #5 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #5 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 Process 83612 (syz-executor.1) thread 0xffff8000ffff4d28 (62276) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ab97c8) #0 witness_lock+0x44d #1 syscall+0x41d mi_syscall sys/sys/syscall_mi.h:100 [inline] #1 syscall+0x41d sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 exclusive mutex semapl r = 0 (0xffffffff82baa770) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 sys_semget+0x259 sys/kern/sysv_sem.c:428 #5 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #5 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10318 6545K 6676K 78643K 11767 0 pcb 13 9K 10K 78643K 66 0 rtable 234 6K 6K 78643K 353 0 ifaddr 87 17K 17K 78643K 100 0 counters 56 35K 35K 78643K 60 0 ioctlops 0 0K 4K 78643K 1490 0 iov 0 0K 16K 78643K 37 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1332 83K 83K 78643K 1433 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 13 1K 1K 78643K 63 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 93K 78643K 358 0 proc 69 91K 115K 78643K 517 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 6K 6K 78643K 99 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 2K 78643K 710 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 62K 78643K 8 0 UVM amap 243 80K 81K 78643K 3753 0 UVM aobj 8 4K 6K 78643K 11 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 38 0 NDP 12 0K 2K 78643K 30 0 temp 97 4714K 5738K 78643K 4400 0 kqueue 12 18K 22K 78643K 42 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 36 0 33 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 53 0 38 1 0 1 1 0 8 0 syncache 296 7 0 7 2 1 1 1 0 8 1 tcpqe 32 174 0 174 2 1 1 1 0 8 1 tcpcb 736 157 0 140 4 0 4 4 0 8 2 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 320 344 0 331 7 0 7 7 0 8 5 nd6 48 24 0 0 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 27 0 3 1 0 1 1 0 8 0 pfstkey 120 27 0 3 1 0 1 1 0 8 0 pfstate 336 27 0 3 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 54 0 44 1 0 1 1 0 8 0 semapl: pool(0xffffffff82baa760:semapl): page inconsistency: page 0xfffffd8067ac0000; item ordinal 0; addr 0xb982897bac5da83e shmpl 112 8 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1756 0 323 91 0 91 91 0 8 0 ffsino 272 1756 0 323 97 0 97 97 0 8 0 nchpl 144 2340 0 660 63 0 63 63 0 8 0 uvmvnodes 80 2008 0 0 41 0 41 41 0 8 0 vnodes 216 2008 0 0 112 0 112 112 0 8 0 namei 1024 8373 0 8373 3 2 1 2 0 8 1 percpumem 16 42 0 2 1 0 1 1 0 8 0 kstatmem 264 28 0 4 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 7060 0 7060 9 5 4 8 0 8 4 plimitpl 152 68 0 53 1 0 1 1 0 8 0 sigapl 424 671 0 624 8 1 7 7 0 8 0 futexpl 64 2175 0 2173 1 0 1 1 0 8 0 knotepl 120 116 0 0 4 0 4 4 0 8 0 kqueuepl 216 109 0 101 5 0 5 5 0 8 4 pipepl 320 215 0 187 9 1 8 8 0 8 5 fdescpl 496 653 0 624 6 2 4 5 0 8 0 filepl 152 3396 0 3149 17 0 17 17 0 8 7 lockfpl 104 78 0 76 1 0 1 1 0 8 0 lockfspl 48 21 0 19 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 7 1 0 1 1 0 8 0 ucredpl 104 170 0 158 1 0 1 1 0 8 0 zombiepl 144 624 0 624 1 0 1 1 0 8 1 processpl 1064 671 0 624 4 0 4 4 0 8 0 procpl 672 1130 0 1062 9 2 7 7 0 8 0 sockpl 488 436 0 405 13 1 12 13 0 8 7 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 417 0 0 52 0 52 52 0 8 0 mtagpl 96 147 0 0 4 0 4 4 0 8 0 mbufpl 256 446 0 0 28 0 28 28 0 8 0 bufpl 288 3852 0 131 266 0 266 266 0 8 0 anonpl 24 105501 0 89390 103 2 101 101 0 186 0 amapchunkpl 152 9164 0 8455 33 2 31 31 0 158 0 amappl16 200 1147 0 670 26 0 26 26 0 8 0 amappl15 192 142 0 131 1 0 1 1 0 8 0 amappl14 184 22 0 18 1 0 1 1 0 8 0 amappl13 176 141 0 136 1 0 1 1 0 8 0 amappl12 168 23 0 13 1 0 1 1 0 8 0 amappl11 160 84 0 66 1 0 1 1 0 8 0 amappl10 152 17 0 15 1 0 1 1 0 8 0 amappl9 144 627 0 617 1 0 1 1 0 8 0 amappl8 136 677 0 614 3 0 3 3 0 8 0 amappl7 128 159 0 138 1 0 1 1 0 8 0 amappl6 120 314 0 299 2 1 1 2 0 8 0 amappl5 112 276 0 261 1 0 1 1 0 8 0 amappl4 104 852 0 824 3 2 1 2 0 8 0 amappl3 96 1367 0 1315 3 1 2 2 0 8 0 amappl2 88 496 0 455 3 2 1 2 0 8 0 amappl1 80 17813 0 17177 21 5 16 20 0 8 1 amappl 88 3282 0 3116 6 1 5 5 0 92 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 128 253 0 253 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 10 0 3 1 0 1 1 0 8 0 uaddrrnd 24 653 0 624 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 653 0 624 1 0 1 1 0 8 0 vmmpekpl 168 10001 0 9944 3 0 3 3 0 8 0 vmmpepl 168 65645 0 63187 152 8 144 151 0 357 28 vmsppl 368 652 0 624 5 2 3 4 0 8 0 rwobjpl 56 19085 0 15574 52 1 51 51 0 8 0 pdppl 4096 1313 0 1248 113 44 69 83 0 8 4 pvpl 32 322094 0 301764 244 17 227 243 0 265 55 pmappl 248 652 0 624 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 705 0 51 19 0 19 19 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff8293eff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82ab95c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ab95c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0x7f7ffffd1070, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8293eff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82ab95c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ab95c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0x7f7ffffd1070, count: -6 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82603660) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82baa760,9,ffff800029620578) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82baa760,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 sys_semget(ffff8000ffff4d28,ffff800029620678,ffff8000296206c0) at sys_semget+0x259 sys/kern/sysv_sem.c:428 syscall(ffff800029620740) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800029620740) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd08e1dff050, count: 8 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82603660) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82baa760,9,ffff800029620578) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82baa760,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 sys_semget(ffff8000ffff4d28,ffff800029620678,ffff8000296206c0) at sys_semget+0x259 sys/kern/sysv_sem.c:428 syscall(ffff800029620740) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800029620740) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd08e1dff050, count: -7