panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 89711 35588 0 0 0 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825c306b) at panic+0x177 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82b8eb38,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 rt_clone(ffff80002130a8e8,fffffd8074006648,0) at rt_clone+0x5c sys/net/route.c:257 rtalloc_mpath(fffffd8074006648,fffffd8074006610,0) at rtalloc_mpath+0xbc rt_match sys/net/route.c:235 [inline] rtalloc_mpath(fffffd8074006648,fffffd8074006610,0) at rtalloc_mpath+0xbc sys/net/route.c:350 in_pcbrtentry(fffffd80740065c0) at in_pcbrtentry+0x1cf ip6_ctloutput(0,fffffd806e906b80,29,2c,fffffd806eaed300) at ip6_ctloutput+0x1079 sys/netinet6/ip6_output.c:1511 sys_getsockopt(ffff8000ffff5260,ffff80002130aad8,ffff80002130ab20) at sys_getsockopt+0x15e sys/kern/uipc_syscalls.c:1275 syscall(ffff80002130aba0) at syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002130aba0) at syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdf2d0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825c306b) at panic+0x177 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82b8eb38,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 rt_clone(ffff80002130a8e8,fffffd8074006648,0) at rt_clone+0x5c sys/net/route.c:257 rtalloc_mpath(fffffd8074006648,fffffd8074006610,0) at rtalloc_mpath+0xbc rt_match sys/net/route.c:235 [inline] rtalloc_mpath(fffffd8074006648,fffffd8074006610,0) at rtalloc_mpath+0xbc sys/net/route.c:350 in_pcbrtentry(fffffd80740065c0) at in_pcbrtentry+0x1cf ip6_ctloutput(0,fffffd806e906b80,29,2c,fffffd806eaed300) at ip6_ctloutput+0x1079 sys/netinet6/ip6_output.c:1511 sys_getsockopt(ffff8000ffff5260,ffff80002130aad8,ffff80002130ab20) at sys_getsockopt+0x15e sys/kern/uipc_syscalls.c:1275 syscall(ffff80002130aba0) at syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002130aba0) at syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdf2d0, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002130a610 rbx 0xffffffff829deb8f cpu_info_full_primary+0x2b8f rdx 0x3fd rcx 0 rax 0x68 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6c25b484c36e5ae5 r11 0x6c621de4d0c8b33 r12 0xffffffff829de990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff817e9808 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002130a600 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=89711 stat=onproc flags process=0 proc=0 pri=58, usrpri=58, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff5a40,0xffffffff82b90490 process=0xffff8000ffff8868 user=0xffff800021305000, vmspace=0xfffffd806ef7e2e8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *35588 89711 28045 0 7 0 syz-executor.0 28045 321983 80385 0 3 0x82 nanoslp syz-executor.0 80385 314277 60823 0 3 0x82 thrsleep syz-execprog 80385 458928 60823 0 3 0x4000082 nanoslp syz-execprog 80385 396268 60823 0 3 0x4000082 wait syz-execprog 80385 45513 60823 0 3 0x4000082 thrsleep syz-execprog 80385 466170 60823 0 3 0x4000082 thrsleep syz-execprog 80385 397826 60823 0 3 0x4000082 kqread syz-execprog 80385 516790 60823 0 3 0x4000082 thrsleep syz-execprog 80385 184933 60823 0 3 0x4000082 thrsleep syz-execprog 60823 194281 22786 0 3 0x10008a sigsusp ksh 22786 254983 87310 0 3 0x9a kqread sshd 22225 167559 1 0 3 0x100083 ttyin getty 87310 298712 1 0 3 0x88 kqread sshd 49063 521378 66630 73 3 0x1100090 kqread syslogd 66630 253003 1 0 3 0x100082 netio syslogd 89666 244563 1 0 3 0x100080 kqread resolvd 46937 175770 28645 77 3 0x100092 kqread dhcpleased 75671 443030 28645 77 3 0x100092 kqread dhcpleased 28645 168391 1 0 3 0x80 kqread dhcpleased 77951 5463 0 0 3 0x14200 bored smr 75089 118648 0 0 3 0x14200 pgzero zerothread 85260 376991 0 0 3 0x14200 aiodoned aiodoned 14813 165500 0 0 3 0x14200 syncer update 94701 130748 0 0 3 0x14200 cleaner cleaner 75956 97698 0 0 3 0x14200 reaper reaper 54503 403075 0 0 3 0x14200 pgdaemon pagedaemon 46258 236753 0 0 3 0x14200 bored viomb 2964 375641 0 0 3 0x40014200 acpi0 acpi0 74982 452775 0 0 7 0x40014200 idle1 32944 285570 0 0 3 0x14200 bored softnet 49010 429097 0 0 3 0x14200 bored softnet 91188 145492 0 0 3 0x14200 bored softnet 91010 514870 0 0 3 0x14200 bored softnet 91713 280412 0 0 3 0x14200 bored systqmp 2108 132078 0 0 3 0x14200 bored systq 88781 355421 0 0 3 0x40014200 bored softclock 14287 154539 0 0 3 0x40014200 idle0 1 489986 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &inp->inp_mtx r = 0 (0xfffffd8074006680) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 sys_getsockopt+0x145 sys/kern/uipc_syscalls.c:1275 #4 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] #4 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 #5 Xsyscall+0x128 Process 35588 (syz-executor.0) thread 0xffff8000ffff5260 (89711) shared rwlock netlock r = 0 (0xffffffff82957180) #0 witness_lock+0x44d #1 solock_shared+0x64 pru_lock sys/sys/protosw.h:287 [inline] #1 solock_shared+0x64 sys/kern/uipc_socket2.c:371 #2 sys_getsockopt+0x145 sys/kern/uipc_syscalls.c:1275 #3 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] #3 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 #4 Xsyscall+0x128 exclusive mutex &inp->inp_mtx r = 0 (0xfffffd8074006680) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 sys_getsockopt+0x145 sys/kern/uipc_syscalls.c:1275 #4 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] #4 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10164 6392K 6420K 78643K 11254 0 pcb 13 8K 8K 78643K 13 0 rtable 80 2K 2K 78643K 133 0 ifaddr 29 8K 8K 78643K 29 0 counters 46 34K 34K 78643K 46 0 ioctlops 0 0K 2K 78643K 20 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1167 73K 73K 78643K 1180 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 4 9K 13K 78643K 67 0 proc 55 78K 91K 78643K 267 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 22 1K 1K 78643K 22 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 25 122K 122K 78643K 25 0 exec 0 0K 1K 78643K 258 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 64K 78643K 10 0 UVM amap 139 14K 14K 78643K 2011 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 0K 78643K 94 0 NDP 4 0K 0K 78643K 6 0 temp 23 4677K 4741K 78643K 3110 0 kqueue 12 18K 18K 78643K 25 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 19 0 16 1 0 1 1 0 8 0 rtentry 112 34 0 1 1 0 1 1 0 8 0 unpcb 144 80 0 67 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpqe 32 61 0 61 1 1 0 1 0 8 0 tcpcb 776 55 0 51 1 0 1 1 0 8 0 arp 120 4 0 0 1 0 1 1 0 8 0 inpcb 368 170 0 162 1 0 1 1 0 8 0 nd6 48 3 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 145 0 0 10 0 10 10 0 8 0 art_table 32 146 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1488 0 93 88 0 88 88 0 8 0 ffsino 272 1488 0 93 94 0 94 94 0 8 1 nchpl 144 1769 0 150 61 0 61 61 0 8 1 uvmvnodes 80 1497 0 0 31 0 31 31 0 8 0 vnodes 216 1497 0 0 84 0 84 84 0 8 0 namei 1024 5087 0 5087 3 1 2 2 0 8 2 percpumem 16 35 0 0 1 0 1 1 0 8 0 kstatmem 264 8 0 0 1 0 1 1 0 8 0 scxspl 216 6048 0 6048 10 8 2 8 0 8 2 plimitpl 152 18 0 10 1 0 1 1 0 8 0 sigapl 424 370 0 338 5 0 5 5 0 8 1 knotepl 120 54 0 0 2 0 2 2 0 8 0 kqueuepl 216 21 0 13 1 0 1 1 0 8 0 pipepl 320 100 0 93 2 1 1 1 0 8 0 fdescpl 496 353 0 338 4 1 3 3 0 8 1 filepl 152 1534 0 1467 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 104 66 0 56 1 0 1 1 0 8 0 zombiepl 144 338 0 338 2 1 1 1 0 8 1 processpl 1072 370 0 338 3 0 3 3 0 8 0 procpl 672 377 0 338 4 0 4 4 0 8 0 sockpl 488 269 0 245 4 0 4 4 0 8 1 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 268 0 0 34 0 34 34 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 329 0 0 21 0 21 21 0 8 0 bufpl 288 3951 0 138 273 0 273 273 0 8 0 anonpl 24 104702 0 100903 61 16 45 46 0 186 21 amapchunkpl 152 5410 0 5142 18 1 17 17 0 158 4 amappl16 200 2054 0 1996 10 5 5 5 0 8 0 amappl15 192 4 0 3 2 1 1 1 0 8 0 amappl14 184 124 0 112 2 0 2 2 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 300 0 299 2 1 1 1 0 8 0 amappl11 160 49 0 38 1 0 1 1 0 8 0 amappl10 152 21 0 20 2 1 1 1 0 8 0 amappl9 144 934 0 934 2 1 1 1 0 8 1 amappl8 136 81 0 63 2 1 1 1 0 8 0 amappl7 128 116 0 100 2 0 2 2 0 8 1 amappl6 120 116 0 104 2 0 2 2 0 8 1 amappl5 112 86 0 77 1 0 1 1 0 8 0 amappl4 104 382 0 358 2 0 2 2 0 8 1 amappl3 96 543 0 514 2 0 2 2 0 8 1 amappl2 88 634 0 577 3 0 3 3 0 8 1 amappl1 80 10215 0 9684 25 5 20 22 0 8 8 amappl 88 1635 0 1562 4 1 3 3 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 353 0 338 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 353 0 338 1 0 1 1 0 8 0 vmmpekpl 168 8568 0 8551 1 0 1 1 0 8 0 vmmpepl 168 36083 0 34767 114 9 105 105 0 357 47 vmsppl 368 352 0 338 3 0 3 3 0 8 1 rwobjpl 56 13571 0 11254 44 1 43 43 0 8 8 pdppl 4096 713 0 676 71 28 43 53 0 8 6 pvpl 32 265232 0 257442 287 17 270 271 0 265 203 pmappl 248 352 0 338 3 1 2 2 0 8 1 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 607 0 31 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825c306b) at panic+0x177 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82b8eb38,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82b8e930) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 rt_clone(ffff80002130a8e8,fffffd8074006648,0) at rt_clone+0x5c sys/net/route.c:257 rtalloc_mpath(fffffd8074006648,fffffd8074006610,0) at rtalloc_mpath+0xbc rt_match sys/net/route.c:235 [inline] rtalloc_mpath(fffffd8074006648,fffffd8074006610,0) at rtalloc_mpath+0xbc sys/net/route.c:350 in_pcbrtentry(fffffd80740065c0) at in_pcbrtentry+0x1cf ip6_ctloutput(0,fffffd806e906b80,29,2c,fffffd806eaed300) at ip6_ctloutput+0x1079 sys/netinet6/ip6_output.c:1511 sys_getsockopt(ffff8000ffff5260,ffff80002130aad8,ffff80002130ab20) at sys_getsockopt+0x15e sys/kern/uipc_syscalls.c:1275 syscall(ffff80002130aba0) at syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002130aba0) at syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdf2d0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020dd8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: -5 ddb{1}>