panic: assertwaitok: non-zero mutex count: 1 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 198283 22761 0 0x2 0x4000000 0 syz-executor3014581156 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827c19a3) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd806d86d320,ffffffff82c4a100,118,ffffffff827afd95,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd806d86d200,fffffd806d86d320,118,ffffffff827afd95,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd806d86d200,fffffd806d86d2d0,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd806d86d200,ffff80002a236938,ffff80002a2368f8,0,0,ffff80002a236abc,27bd27254a5463f2) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a1ce550,5,ffff80002a236a90,0,ffff80002a236a88) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1ce550,ffff80002a236b90,ffff80002a236be0) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a236c60) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a236c60) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd56cdc45b40, count: 2 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: assertwaitok: non-zero mutex count: 1 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827c19a3) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd806d86d320,ffffffff82c4a100,118,ffffffff827afd95,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd806d86d200,fffffd806d86d320,118,ffffffff827afd95,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd806d86d200,fffffd806d86d2d0,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd806d86d200,ffff80002a236938,ffff80002a2368f8,0,0,ffff80002a236abc,27bd27254a5463f2) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a1ce550,5,ffff80002a236a90,0,ffff80002a236a88) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1ce550,ffff80002a236b90,ffff80002a236be0) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a236c60) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a236c60) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd56cdc45b40, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a2364a0 rbx 0xffff800029d2cba7 rdx 0x3fd rcx 0 rax 0x2d r8 0x101010101010101 r9 0x8080808080808080 r10 0xc6904616f179d210 r11 0xc80610c20958701 r12 0xffff800029d2c9a8 r13 0 r14 0 r15 0x1 rip 0xffffffff822e738c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a236490 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor3014581156) tid=26884 pid=22761 tcnt=4 stat=sleep flags process=2 proc=4000080 runpri=24, usrpri=53, slppri=24, nice=20 wchan=0xfffffd806d86d320, wmesg=netlck, ps_single=0x0 forw=0x0, list=0xffff80002a185d50,0xffff80002a1ce2b8 process=0xffff8000ffff69f0 user=0xffff80002a231000, vmspace=0xfffffd806e9b31e0 estcpu=3, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 22761 81306 61628 0 3 0x82 nanoslp syz-executor3014581156 22761 198283 61628 0 7 0x4000002 syz-executor3014581156 *22761 26884 61628 0 3 0x4000082 netlck syz-executor3014581156 22761 280243 61628 0 3 0x4000082 fsleep syz-executor3014581156 61628 174040 36343 0 3 0x10008a sigsusp ksh 36343 381081 90090 0 3 0x9a kqread sshd 25172 516296 1 0 3 0x100083 ttyin getty 90090 268151 1 0 3 0x88 kqread sshd 20798 171767 65414 74 3 0x1100092 bpf pflogd 65414 60740 1 0 3 0x80 netio pflogd 72019 440083 87753 73 3 0x1100090 kqread syslogd 87753 473010 1 0 3 0x100082 netio syslogd 44932 104283 1 0 3 0x100080 kqread resolvd 4252 291308 42587 77 3 0x100092 kqread dhcpleased 69385 486072 42587 77 3 0x100092 kqread dhcpleased 42587 499737 1 0 3 0x80 kqread dhcpleased 64513 396002 0 0 3 0x14200 bored smr 74600 333886 0 0 3 0x14200 pgzero zerothread 96240 219718 0 0 3 0x14200 aiodoned aiodoned 12174 67676 0 0 3 0x14200 syncer update 99807 186239 0 0 3 0x14200 cleaner cleaner 30016 169706 0 0 3 0x14200 reaper reaper 16021 2173 0 0 3 0x14200 pgdaemon pagedaemon 79485 14675 0 0 3 0x14200 bored viomb 83583 457085 0 0 3 0x40014200 acpi0 acpi0 34995 372446 0 0 3 0x40014200 idle1 93761 95749 0 0 3 0x14200 bored softnet3 2263 187180 0 0 3 0x14200 bored softnet2 37558 509583 0 0 3 0x14200 bored softnet1 47301 70488 0 0 3 0x14200 bored softnet0 49275 345517 0 0 3 0x14200 bored systqmp 99081 236092 0 0 3 0x14200 bored systq 17414 189941 0 0 3 0x14200 tmoslp softclockmp 64230 290626 0 0 3 0x40014200 tmoslp softclock 41717 237146 0 0 3 0x40014200 idle0 1 302051 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive sched_lock &sched_lock r = 0 (0xffffffff82d3bdb0) #0 witness_lock+0x447 #1 sleep_finish+0x142 sys/kern/kern_synch.c:398 #2 rwsleep+0xab sys/kern/kern_synch.c:300 #3 sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 #4 sblock+0x1c4 sys/kern/uipc_socket2.c:514 #5 soreceive+0x5fe sys/kern/uipc_socket.c:837 #6 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #7 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #8 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #8 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #9 Xsyscall+0x128 exclusive mutex &inp->inp_mtx r = 0 (0xfffffd806f514ad0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 soreceive+0x5dc pru_lock sys/sys/protosw.h:288 [inline] #3 soreceive+0x5dc sys/kern/uipc_socket.c:911 #4 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #5 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #6 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #6 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #7 Xsyscall+0x128 Process 22761 (syz-executor3014581156) thread 0xffff80002a185d50 (198283) exclusive rwlock solock r = 0 (0xfffffd806d86d218) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 soreceive+0xd05 pru_lock sys/sys/protosw.h:287 [inline] #2 soreceive+0xd05 sys/kern/uipc_socket.c:1062 #3 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #4 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #5 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #5 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #6 Xsyscall+0x128 shared rwlock netlock r = 0 (0xffffffff82c4a110) #0 witness_lock+0x447 #1 solock_shared+0x68 sys/kern/uipc_socket2.c:370 #2 soreceive+0xd05 pru_lock sys/sys/protosw.h:287 [inline] #2 soreceive+0xd05 sys/kern/uipc_socket.c:1062 #3 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #4 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #5 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #5 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10165 6456K 6457K 166960K 11243 0 pcb 13 8K 8K 166960K 13 0 rtable 58 1K 2K 166960K 116 0 pf 15 6K 10K 166960K 26 0 ifaddr 13 9K 9K 166960K 13 0 ifgroup 22 1K 1K 166960K 22 0 counters 46 34K 34K 166960K 46 0 ioctlops 0 0K 4K 166960K 1475 0 iov 2 1K 1K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1176 74K 74K 166960K 1192 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 1 0K 0K 166960K 1 0 proc 67 91K 91K 166960K 302 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 11 0K 0K 166960K 11 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 272 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 112 12K 12K 166960K 2561 0 UVM aobj 3 2K 2K 166960K 3 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 4 0K 0K 166960K 4 0 temp 1 5908K 5972K 166960K 3079 0 kqueue 11 16K 18K 166960K 24 0 SYN cache 2 16K 16K 166960K 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 21 0 18 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 144 35 0 20 1 0 1 1 0 8 0 syncache 312 5 0 5 1 0 1 1 0 8 1 tcpqe 32 127 0 127 1 0 1 1 0 8 1 tcpcb 808 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 368 36 0 28 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 9 0 0 1 0 1 1 0 8 0 pfstkey 128 9 0 0 1 0 1 1 0 8 0 pfstate 376 9 0 0 1 0 1 1 0 8 0 pfrule 1344 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 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1433 0 38 88 0 88 88 0 8 0 ffsino 272 1433 0 38 93 0 93 93 0 8 0 nchpl 144 1619 0 49 59 0 59 59 0 8 0 uvmvnodes 80 1447 0 0 30 0 30 30 0 8 0 vnodes 216 1447 0 0 81 0 81 81 0 8 0 namei 1024 4579 0 4579 1 0 1 1 0 8 1 percpumem 16 36 0 0 1 0 1 1 0 8 0 kstatmem 264 8 0 0 1 0 1 1 0 8 0 scxspl 216 4853 0 4853 3 1 2 2 1 8 2 plimitpl 152 18 0 10 1 0 1 1 0 8 0 sigapl 424 341 0 308 5 1 4 5 0 8 0 futexpl 64 2 0 1 1 0 1 1 0 8 0 knotepl 120 43 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 13 1 0 1 1 0 8 0 pipepl 320 95 0 92 1 0 1 1 0 8 0 fdescpl 496 323 0 308 3 0 3 3 0 8 0 filepl 152 1284 0 1224 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 71 0 59 1 0 1 1 0 8 0 zombiepl 144 308 0 308 1 0 1 1 0 8 1 processpl 1072 341 0 308 3 0 3 3 0 8 0 procpl 680 344 0 308 4 1 3 4 0 8 0 sockpl 488 92 0 66 4 0 4 4 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 261 0 0 33 0 33 33 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 273 0 0 18 0 18 18 0 8 0 bufpl 288 2474 0 90 171 0 171 171 0 8 0 anonpl 24 203370 0 201278 25 1 24 25 0 186 11 amapchunkpl 152 9125 0 8939 8 0 8 8 0 158 0 amappl16 200 6222 0 6221 5 1 4 5 0 8 3 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 124 0 112 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 874 0 859 2 1 1 2 0 8 0 amappl11 160 60 0 46 1 0 1 1 0 8 0 amappl10 152 35 0 35 1 0 1 1 0 8 1 amappl9 144 162 0 162 1 0 1 1 0 8 1 amappl8 136 44 0 42 1 0 1 1 0 8 0 amappl7 128 115 0 102 1 0 1 1 0 8 0 amappl6 120 135 0 130 1 0 1 1 0 8 0 amappl5 112 105 0 94 1 0 1 1 0 8 0 amappl4 104 372 0 351 1 0 1 1 0 8 0 amappl3 96 2169 0 2125 3 1 2 2 0 8 0 amappl2 88 648 0 591 2 0 2 2 0 8 0 amappl1 80 9249 0 8776 12 0 12 12 0 8 0 amappl 88 2252 0 2187 2 0 2 2 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 24 323 0 308 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 323 0 308 1 0 1 1 0 8 0 vmmpekpl 168 7269 0 7251 1 0 1 1 0 8 0 vmmpepl 168 36582 0 35514 52 1 51 52 0 357 4 vmsppl 464 322 0 308 3 0 3 3 0 8 0 rwobjpl 56 20063 0 17896 33 1 32 33 0 8 1 pdppl 4096 654 0 616 54 16 38 46 0 8 0 pvpl 32 307417 0 302535 58 2 56 57 0 265 16 pmappl 248 322 0 308 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 481 0 19 14 0 14 14 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bfaff0) at x86_ipi_db+0x1e 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+0x27 __mp_lock(ffffffff82d3bba8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d3bba8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(fffffd806d86d320,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 soreceive(fffffd806d86d200,ffff80002a230048,ffff80002a230008,0,0,ffff80002a2301cc,27bd27254a5463f2) at soreceive+0x1857 pru_unlock sys/sys/protosw.h:294 [inline] soreceive(fffffd806d86d200,ffff80002a230048,ffff80002a230008,0,0,ffff80002a2301cc,27bd27254a5463f2) at soreceive+0x1857 sys/kern/uipc_socket.c:1194 recvit(ffff80002a185d50,5,ffff80002a2301a0,0,ffff80002a230198) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a185d50,ffff80002a2302a0,ffff80002a2302f0) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a230370) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a230370) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd5742c15ea0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff82bfaff0) at x86_ipi_db+0x1e 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+0x27 __mp_lock(ffffffff82d3bba8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d3bba8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(fffffd806d86d320,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 soreceive(fffffd806d86d200,ffff80002a230048,ffff80002a230008,0,0,ffff80002a2301cc,27bd27254a5463f2) at soreceive+0x1857 pru_unlock sys/sys/protosw.h:294 [inline] soreceive(fffffd806d86d200,ffff80002a230048,ffff80002a230008,0,0,ffff80002a2301cc,27bd27254a5463f2) at soreceive+0x1857 sys/kern/uipc_socket.c:1194 recvit(ffff80002a185d50,5,ffff80002a2301a0,0,ffff80002a230198) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a185d50,ffff80002a2302a0,ffff80002a2302f0) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a230370) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a230370) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd5742c15ea0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827c19a3) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd806d86d320,ffffffff82c4a100,118,ffffffff827afd95,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd806d86d200,fffffd806d86d320,118,ffffffff827afd95,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd806d86d200,fffffd806d86d2d0,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd806d86d200,ffff80002a236938,ffff80002a2368f8,0,0,ffff80002a236abc,27bd27254a5463f2) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a1ce550,5,ffff80002a236a90,0,ffff80002a236a88) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1ce550,ffff80002a236b90,ffff80002a236be0) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a236c60) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a236c60) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd56cdc45b40, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827c19a3) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd806d86d320,ffffffff82c4a100,118,ffffffff827afd95,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd806d86d200,fffffd806d86d320,118,ffffffff827afd95,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd806d86d200,fffffd806d86d2d0,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd806d86d200,ffff80002a236938,ffff80002a2368f8,0,0,ffff80002a236abc,27bd27254a5463f2) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a1ce550,5,ffff80002a236a90,0,ffff80002a236a88) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1ce550,ffff80002a236b90,ffff80002a236be0) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a236c60) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a236c60) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd56cdc45b40, count: -13 ddb{1}>