kernel: protection fault trap, code=0 Stopped at sblock+0x4a: movq 0x8(%rax),%rax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace sblock(fffffd807a9b3978,fffffd807a9b3ab0,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd807a9b3978,fffffd807a9b3ab0,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd807a9b3978,0,ffff8000212822f8,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021282240) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8064eaab20,ffff8000212822f8,3,fffffd807f7d84e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800021237500,fffffd8064eaab20,fffffd807f7d84e0,ffff8000212823c0,ffff8000212823a0) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrgenio(ffff800021237500,f8,1,ffff8000006c5f00,c) at ktrgenio+0x282 ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff800021237500,f8,1,ffff8000006c5f00,c) at ktrgenio+0x282 sys/kern/kern_ktrace.c:265 dofilewritev(ffff800021237500,f8,ffff800021282548,0,ffff800021282640) at dofilewritev+0x397 sys/kern/sys_generic.c:401 sys_write(ffff800021237500,ffff8000212825e0,ffff800021282640) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff8000212826b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212826b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffef0d0, count: -10 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800021282100 rbx 0xfffffd807a9b3ab0 rdx 0 rcx 0xb rax 0xc52f0dd37f89150 r8 0x44b82fa09b5a53 r9 0 r10 0x948f5738bd471430 r11 0x93c719de2bda8764 r12 0xfffffd807a9b3901 r13 0x1 r14 0xfffffd807a9b3b00 r15 0xfffffd807a9b3978 rip 0xffffffff8110370a sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000212820a0 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb{0}> show proc PROC (syz-executor.0) pid=81640 stat=onproc flags process=2 proc=1 pri=24, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000212377a0,0xffff800021236010 process=0xffff8000211f1d28 user=0xffff80002127d000, vmspace=0xfffffd807efff2e0 estcpu=36, cpticks=1, pctcpu=0.4 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 24839 127912 93792 0 3 0x82 nanoslp syz-executor.3 15272 439060 93792 0 2 0x83 syz-executor.2 57727 286061 0 0 3 0x14200 bored sosplice 63788 420456 93792 0 2 0x83 syz-executor.1 *93765 81640 93792 0 7 0x3 syz-executor.0 93792 448576 41048 0 3 0x82 thrsleep syz-fuzzer 93792 117448 41048 0 3 0x4000082 thrsleep syz-fuzzer 93792 489018 41048 0 2 0x4000083 syz-fuzzer 93792 75420 41048 0 3 0x4000082 thrsleep syz-fuzzer 93792 235028 41048 0 2 0x4000083 syz-fuzzer 93792 250851 41048 0 3 0x4000082 thrsleep syz-fuzzer 93792 469639 41048 0 2 0x4000083 syz-fuzzer 93792 189683 41048 0 2 0x4000083 syz-fuzzer 93792 368480 41048 0 3 0x4000082 kqread syz-fuzzer 41048 328037 27939 0 3 0x10008a sigsusp ksh 27939 94640 82496 0 3 0x9a poll sshd 6824 456836 1 0 3 0x100083 ttyopn getty 82496 142297 1 0 3 0x88 poll sshd 21510 185913 87234 74 3 0x100092 bpf pflogd 87234 30396 1 0 3 0x80 netio pflogd 53300 363941 87072 73 3 0x100090 kqread syslogd 87072 414189 1 0 3 0x100082 netio syslogd 31113 56210 1 0 3 0x100080 kqread resolvd 49199 374831 33873 77 3 0x100092 kqread dhcpleased 78816 482346 33873 77 3 0x100092 kqread dhcpleased 33873 369469 1 0 3 0x80 kqread dhcpleased 29296 492972 0 0 3 0x14200 bored smr 84547 384337 0 0 2 0x14200 zerothread 25652 345450 0 0 3 0x14200 aiodoned aiodoned 79389 482953 0 0 3 0x14200 syncer update 13282 473707 0 0 3 0x14200 cleaner cleaner 59713 155796 0 0 7 0x14200 reaper 66806 219320 0 0 3 0x14200 pgdaemon pagedaemon 81319 385931 0 0 3 0x14200 bored viomb 15256 227448 0 0 3 0x40014200 acpi0 acpi0 58462 357034 0 0 3 0x40014200 idle1 5955 478654 0 0 3 0x14200 bored softnet 72522 288335 0 0 3 0x14200 bored systqmp 63952 290937 0 0 3 0x14200 bored systq 61397 379992 0 0 3 0x40014200 bored softclock 62300 115021 0 0 3 0x40014200 idle0 1 60234 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 93765 (syz-executor.0) thread 0xffff800021237500 (81640) exclusive rwlock unplock r = 0 (0xffffffff827d1550) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rwsleep+0x100 sys/kern/kern_synch.c:316 #3 sosend+0x71a sys/kern/uipc_socket.c:563 #4 fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 #5 VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 #6 ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 #7 ktrgenio+0x282 ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] #7 ktrgenio+0x282 sys/kern/kern_ktrace.c:265 #8 dofilewritev+0x397 sys/kern/sys_generic.c:401 #9 sys_write+0x83 sys/kern/sys_generic.c:300 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829cd5e8) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 rwsleep+0xd5 sys/kern/kern_synch.c:313 #5 sosend+0x71a sys/kern/uipc_socket.c:563 #6 fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 #7 VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 #8 ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 #9 ktrgenio+0x282 ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] #9 ktrgenio+0x282 sys/kern/kern_ktrace.c:265 #10 dofilewritev+0x397 sys/kern/sys_generic.c:401 #11 sys_write+0x83 sys/kern/sys_generic.c:300 #12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10182 6463K 6792K 78643K 14233 0 pcb 13 12K 14K 78643K 387 0 rtable 159 5K 7K 78643K 438 0 ifaddr 63 14K 15K 78643K 232 0 counters 48 34K 34K 78643K 84 0 ioctlops 0 0K 8K 78643K 7639 0 iov 0 0K 16K 78643K 186 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1292 81K 81K 78643K 2759 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 4224 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 6 17K 49K 78643K 4261 0 proc 70 87K 111K 78643K 552 0 subproc 52 3K 3K 78643K 91 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 142 0 in_multi 55 3K 3K 78643K 148 0 ether_multi 1 0K 0K 78643K 19 0 mrt 0 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 2K 78643K 571 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 7 26K 26K 78643K 7 0 UVM amap 264 97K 112K 78643K 55124 0 UVM aobj 85 3K 3K 78643K 90 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 44 0 NDP 8 0K 1K 78643K 40 0 temp 113 4202K 4281K 78643K 36445 0 kqueue 10 14K 18K 78643K 90 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 120 152 0 149 4 3 1 3 0 8 0 rtentry 112 112 0 45 2 0 2 2 0 8 0 unpcb 128 7448 0 7433 28 27 1 5 0 8 0 syncache 296 12 0 12 4 4 0 1 0 8 0 tcpqe 32 297 0 297 3 3 0 2 0 8 0 tcpcb 736 290 0 285 18 10 8 8 0 8 7 arp 120 17 0 7 1 0 1 1 0 8 0 inpcb 304 2861 0 2853 55 49 6 11 0 8 4 rttmr 72 4 0 4 1 1 0 1 0 8 0 nd6 48 28 0 15 1 0 1 1 0 8 0 kcovpl 48 7 0 3 1 0 1 1 0 8 0 ppxss 1248 6 0 6 2 2 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 3 0 2 2 1 1 1 0 482 0 pffrnode 88 3 0 2 2 1 1 1 0 8 0 pffrent 40 9 0 8 2 1 1 1 0 8 0 pfosfp 40 1433 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1433 0 717 21 0 21 21 0 8 0 pfrktable 1344 30 0 29 3 2 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 115 0 113 1 0 1 1 0 8 0 pfstkey 112 117 0 115 4 3 1 4 0 8 0 pfstate 320 115 0 113 10 9 1 10 0 8 0 pfrule 1360 5494 0 5441 5 0 5 5 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 420 0 138 18 0 18 18 0 8 0 art_table 32 421 0 138 3 0 3 3 0 8 0 art_node 16 111 0 50 1 0 1 1 0 8 0 sysvmsgpl 40 157 0 119 2 1 1 1 0 8 0 semapl 112 4222 0 4212 1 0 1 1 0 8 0 shmpl 112 87 0 5 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7884 0 6472 89 0 89 89 0 8 0 ffsino 272 7884 0 6472 95 0 95 95 0 8 0 nchpl 144 12787 0 11182 61 0 61 61 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 42120 0 42120 2 1 1 1 0 8 1 percpumem 16 54 0 18 1 0 1 1 0 8 0 vcpupl 2048 3 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 scxspl 216 37836 0 37836 13 12 1 8 0 8 1 plimitpl 152 187 0 176 1 0 1 1 0 8 0 sigapl 424 4491 0 4457 5 0 5 5 0 8 0 futexpl 64 50264 0 50264 3 2 1 1 0 8 1 knotepl 112 73 0 0 3 0 3 3 0 8 0 kqueuepl 216 144 0 138 1 0 1 1 0 8 0 pipepl 336 593 0 577 26 24 2 7 0 8 0 fdescpl 496 4476 0 4457 4 1 3 4 0 8 0 filepl 152 30783 0 30633 60 51 9 14 0 8 3 lockfpl 104 516 0 514 2 1 1 2 0 8 0 lockfspl 48 123 0 121 1 0 1 1 0 8 0 sessionpl 144 23 0 10 1 0 1 1 0 8 0 pgrppl 48 27 0 14 1 0 1 1 0 8 0 ucredpl 96 5256 0 5244 1 0 1 1 0 8 0 zombiepl 144 4457 0 4456 1 0 1 1 0 8 0 processpl 1064 4491 0 4456 3 0 3 3 0 8 0 procpl 672 12193 0 12150 16 10 6 6 0 8 1 srpgc 96 6 0 6 1 1 0 1 0 8 0 sosppl 168 12 0 12 3 3 0 1 0 8 0 sockpl 480 10497 0 10471 201 189 12 21 0 8 8 mcl64k 65536 19 0 0 3 1 2 3 0 8 0 mcl16k 16384 11 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 32 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 403 0 0 42 3 39 42 0 8 0 mtagpl 96 294 0 0 7 0 7 7 0 8 0 mbufpl 256 981 0 0 47 0 47 47 0 8 0 bufpl 288 9735 0 3391 454 0 454 454 0 8 0 anonpl 24 1189186 0 1172738 168 60 108 131 0 186 3 amapchunkpl 152 134601 0 133919 66 36 30 43 0 158 0 amappl16 200 9859 0 9356 41 11 30 35 0 8 3 amappl15 192 842 0 842 2 2 0 1 0 8 0 amappl14 184 7 0 3 1 0 1 1 0 8 0 amappl13 176 63 0 61 1 0 1 1 0 8 0 amappl12 168 1252 0 1246 1 0 1 1 0 8 0 amappl11 160 960 0 946 1 0 1 1 0 8 0 amappl10 152 260 0 251 1 0 1 1 0 8 0 amappl9 144 1369 0 1366 1 0 1 1 0 8 0 amappl8 136 482 0 426 2 0 2 2 0 8 0 amappl7 128 93 0 83 1 0 1 1 0 8 0 amappl6 120 1159 0 1138 1 0 1 1 0 8 0 amappl5 112 3553 0 3535 1 0 1 1 0 8 0 amappl4 104 1634 0 1605 1 0 1 1 0 8 0 amappl3 96 1514 0 1495 1 0 1 1 0 8 0 amappl2 88 1928 0 1886 2 1 1 2 0 8 0 amappl1 80 82015 0 81544 13 2 11 13 0 8 0 amappl 88 54699 0 54512 7 1 6 6 0 92 1 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 89 0 5 2 0 2 2 0 8 0 uaddrrnd 24 4479 0 4456 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4479 0 4456 1 0 1 1 0 8 0 vmmpekpl 168 33545 0 33515 2 0 2 2 0 8 0 vmmpepl 168 401572 0 399676 164 68 96 126 0 357 2 vmsppl 368 4478 0 4456 3 0 3 3 0 8 0 rwobjpl 56 102547 0 95189 107 1 106 106 0 8 1 pdppl 4096 8966 0 8915 81 24 57 62 0 8 6 pvpl 32 2027366 0 2007349 287 109 178 233 0 265 7 pmappl 248 4478 0 4456 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 899 0 65 24 0 24 24 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sblock(fffffd807a9b3978,fffffd807a9b3ab0,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd807a9b3978,fffffd807a9b3ab0,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd807a9b3978,0,ffff8000212822f8,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021282240) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8064eaab20,ffff8000212822f8,3,fffffd807f7d84e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800021237500,fffffd8064eaab20,fffffd807f7d84e0,ffff8000212823c0,ffff8000212823a0) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrgenio(ffff800021237500,f8,1,ffff8000006c5f00,c) at ktrgenio+0x282 ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff800021237500,f8,1,ffff8000006c5f00,c) at ktrgenio+0x282 sys/kern/kern_ktrace.c:265 dofilewritev(ffff800021237500,f8,ffff800021282548,0,ffff800021282640) at dofilewritev+0x397 sys/kern/sys_generic.c:401 sys_write(ffff800021237500,ffff8000212825e0,ffff800021282640) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff8000212826b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212826b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffef0d0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f kd_curproc sys/dev/kcov.c:572 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:143 __mp_lock(ffffffff829cd3e0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829cd3e0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 reaper(ffff800021148fc0) at reaper+0x150 sys/kern/kern_exit.c:450 end trace frame: 0x0, count: -6