panic: rw_enter: solock locking against myself Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *252910 18469 0 0 0x4000000 0K syz-executor.3 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825e324e) at panic+0x177 sys/kern/subr_prf.c:202 rw_enter(fffffd807e8fb218,1) at rw_enter+0x482 rw_enter_diag sys/kern/kern_rwlock.c:183 [inline] rw_enter(fffffd807e8fb218,1) at rw_enter+0x482 sys/kern/kern_rwlock.c:274 soshutdown(fffffd807e8fb210,0) at soshutdown+0x2f sys/kern/uipc_socket.c:1200 sys_shutdown(ffff800021305cf0,ffff80002478c578,ffff80002478c5c0) at sys_shutdown+0x63 sys/kern/uipc_syscalls.c:945 syscall(ffff80002478c640) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002478c640) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7997c738fb0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: rw_enter: solock locking against myself ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825e324e) at panic+0x177 sys/kern/subr_prf.c:202 rw_enter(fffffd807e8fb218,1) at rw_enter+0x482 rw_enter_diag sys/kern/kern_rwlock.c:183 [inline] rw_enter(fffffd807e8fb218,1) at rw_enter+0x482 sys/kern/kern_rwlock.c:274 soshutdown(fffffd807e8fb210,0) at soshutdown+0x2f sys/kern/uipc_socket.c:1200 sys_shutdown(ffff800021305cf0,ffff80002478c578,ffff80002478c5c0) at sys_shutdown+0x63 sys/kern/uipc_syscalls.c:945 syscall(ffff80002478c640) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002478c640) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7997c738fb0, count: -7 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002478c360 rbx 0xffffffff82937bb7 cpu_info_full_primary+0x2bb7 rdx 0 rcx 0 rax 0xffff800021305cf0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa34f133e0b0fde72 r11 0x8eee07ac21c5843a r12 0xffffffff829379b8 cpu_info_full_primary+0x29b8 r13 0 r14 0 r15 0x1 rip 0xffffffff81d03c18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002478c350 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.3) pid=252910 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800021304010,0xffffffff82a6ea48 process=0xffff8000fffe94e0 user=0xffff800024787000, vmspace=0xfffffd805ad6aa18 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18469 360315 51989 0 2 0 syz-executor.3 *18469 252910 51989 0 7 0x4000000 syz-executor.3 51989 103253 743 0 3 0x82 nanoslp syz-executor.3 38805 318456 743 0 3 0x82 piperd syz-executor.7 91517 480979 743 0 3 0x82 piperd syz-executor.4 52455 279103 743 0 3 0x82 piperd syz-executor.1 74764 196098 743 0 3 0x82 piperd syz-executor.0 26008 97350 743 0 3 0x82 piperd syz-executor.5 29774 423875 743 0 3 0x82 piperd syz-executor.6 47469 1110 743 0 3 0x82 piperd syz-executor.2 79904 191682 0 0 3 0x14200 acct acct 92639 449883 0 0 3 0x14280 nfsidl nfsio 51285 411292 0 0 3 0x14280 nfsidl nfsio 51399 145835 0 0 3 0x14280 nfsidl nfsio 43764 336469 0 0 3 0x14280 nfsidl nfsio 37843 524055 0 0 3 0x14280 nfsidl nfsio 40656 245576 0 0 3 0x14280 nfsidl nfsio 75705 62378 0 0 3 0x14280 nfsidl nfsio 65341 16911 0 0 3 0x14280 nfsidl nfsio 32313 328269 0 0 3 0x14280 nfsidl nfsio 47851 22458 0 0 3 0x14280 nfsidl nfsio 61645 305028 0 0 3 0x14280 nfsidl nfsio 14869 381840 0 0 3 0x14280 nfsidl nfsio 37287 22884 0 0 3 0x14280 nfsidl nfsio 65488 27545 0 0 3 0x14280 nfsidl nfsio 19744 96226 0 0 3 0x14280 nfsidl nfsio 58410 335199 0 0 3 0x14280 nfsidl nfsio 89527 287798 0 0 3 0x14280 nfsidl nfsio 21418 253785 0 0 3 0x14280 nfsidl nfsio 23264 203172 0 0 3 0x14280 nfsidl nfsio 84285 463393 0 0 3 0x14280 nfsidl nfsio 97783 263092 0 0 3 0x14200 bored sosplice 743 311425 38292 0 3 0x82 thrsleep syz-fuzzer 743 271763 38292 0 3 0x4000082 thrsleep syz-fuzzer 743 333350 38292 0 3 0x4000082 thrsleep syz-fuzzer 743 288721 38292 0 3 0x4000082 thrsleep syz-fuzzer 743 376844 38292 0 3 0x4000082 thrsleep syz-fuzzer 743 262489 38292 0 3 0x4000082 thrsleep syz-fuzzer 743 181187 38292 0 3 0x4000082 kqread syz-fuzzer 743 503395 38292 0 3 0x4000082 thrsleep syz-fuzzer 38292 306870 48784 0 3 0x10008a sigsusp ksh 48784 39880 31342 0 3 0x9a kqread sshd 13867 29996 1 0 3 0x100083 ttyin getty 31342 342552 1 0 3 0x88 kqread sshd 58116 467269 50043 74 3 0x1100092 bpf pflogd 50043 95756 1 0 3 0x80 netio pflogd 57128 488090 42423 73 3 0x1100090 kqread syslogd 42423 482716 1 0 3 0x100082 netio syslogd 86943 97412 1 0 3 0x100080 kqread resolvd 61990 384810 89702 77 3 0x100092 kqread dhcpleased 82594 484886 89702 77 3 0x100092 kqread dhcpleased 89702 420933 1 0 3 0x80 kqread dhcpleased 29889 165140 0 0 3 0x14200 bored smr 90492 139274 0 0 2 0x14200 zerothread 88146 227481 0 0 3 0x14200 aiodoned aiodoned 7964 146125 0 0 3 0x14200 syncer update 55664 498906 0 0 3 0x14200 cleaner cleaner 88316 63819 0 0 3 0x14200 reaper reaper 5661 52806 0 0 3 0x14200 pgdaemon pagedaemon 26115 1605 0 0 3 0x14200 bored viomb 34761 33882 0 0 3 0x40014200 acpi0 acpi0 20170 443878 0 0 7 0x40014200 idle1 66244 90135 0 0 3 0x14200 bored softnet 72149 131056 0 0 3 0x14200 bored softnet 1374 294635 0 0 3 0x14200 bored softnet 77134 315124 0 0 3 0x14200 bored softnet 89977 246537 0 0 3 0x14200 bored systqmp 24971 277762 0 0 3 0x14200 bored systq 68294 142827 0 0 3 0x40014200 bored softclock 10143 280179 0 0 3 0x40014200 idle0 1 408596 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10208 6492K 7075K 78643K 23094 0 pcb 13 12K 14K 78643K 654 0 rtable 200 11K 11K 78643K 1792 0 ifaddr 91 19K 21K 78643K 607 0 sysctl 2 0K 0K 78643K 2 0 counters 54 35K 35K 78643K 188 0 ioctlops 0 0K 4K 78643K 2511 0 iov 0 0K 16K 78643K 663 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1345 84K 84K 78643K 3808 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 47 0 VM map 2 1K 1K 78643K 2 0 sem 21 3K 5K 78643K 97 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 85K 78643K 5645 0 sigio 0 0K 0K 78643K 151 0 proc 70 91K 128K 78643K 1528 0 subproc 117 7K 7K 78643K 435 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 124 0 in_multi 74 5K 6K 78643K 507 0 ether_multi 1 0K 0K 78643K 17 0 mrt 1 0K 0K 78643K 25 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 175 784K 784K 78643K 175 0 exec 0 0K 2K 78643K 1951 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 384 726K 726K 78643K 33140 0 UVM aobj 60 2K 2K 78643K 72 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 224 0 NDP 15 0K 1K 78643K 160 0 temp 332 5110K 6135K 78643K 98648 0 kqueue 12 18K 24K 78643K 407 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 120 404 0 401 4 3 1 3 0 8 0 rtentry 112 601 0 522 4 1 3 4 0 8 0 unpcb 144 4147 0 4126 53 52 1 10 0 8 0 syncache 296 39 0 39 11 11 0 1 0 8 0 tcpqe 32 89 0 89 6 6 0 1 0 8 0 tcpcb 736 1629 0 1625 66 65 1 15 0 8 0 arp 120 139 0 125 1 0 1 1 0 8 0 inpcb 320 3689 0 3682 62 61 1 13 0 8 0 nd6 48 116 0 98 1 0 1 1 0 8 0 pkpcb 40 12 0 12 4 4 0 1 0 8 0 kcovpl 48 33 0 24 1 0 1 1 0 8 0 ppxss 1256 22 0 22 4 4 0 1 0 8 0 pfstscr 40 33 0 33 7 7 0 1 0 8 0 pffrag 232 42 0 42 2 2 0 1 0 482 0 pffrnode 88 42 0 42 2 2 0 1 0 8 0 pffrent 40 93 0 93 2 2 0 1 0 8 0 pfosfp 40 1482 0 1056 5 0 5 5 0 8 0 pfosfpen 112 1482 0 762 21 0 21 21 0 8 0 pfrktable 1344 83 0 73 3 2 1 2 0 8 0 pftag 88 14 0 11 1 0 1 1 0 8 0 pfstitem 24 29 0 27 1 0 1 1 0 8 0 pfstkey 120 85 0 83 1 0 1 1 0 8 0 pfstate 336 52 0 50 2 1 1 2 0 8 0 pfrule 1360 169 0 134 4 1 3 3 0 8 0 rttmr 136 4 0 4 1 1 0 1 0 8 0 art_heap8 4096 2 0 1 2 0 2 2 0 8 1 art_heap4 256 2110 0 1773 41 18 23 29 0 8 0 art_table 32 2112 0 1774 4 0 4 4 0 8 0 art_node 16 600 0 533 1 0 1 1 0 8 0 sysvmsgpl 40 60 0 28 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 82 0 63 1 0 1 1 0 8 0 shmpl 112 69 0 12 3 1 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8514 0 7033 93 0 93 93 0 8 0 ffsino 272 8514 0 7033 100 0 100 100 0 8 0 nchpl 144 18011 0 16376 63 0 63 63 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 75704 0 75704 6 5 1 2 0 8 1 percpumem 16 106 0 67 1 0 1 1 0 8 0 vcpupl 2048 50 0 0 7 0 7 7 0 8 0 vmpool 568 57 0 7 5 1 4 4 0 8 0 pfiaddrpl 120 50 0 30 1 0 1 1 0 8 0 kstatmem 264 160 0 134 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 55966 0 55966 14 13 1 8 0 8 1 plimitpl 152 865 0 849 1 0 1 1 0 8 0 sigapl 424 5941 0 5877 9 1 8 8 0 8 0 futexpl 64 52500 0 52500 2 1 1 1 0 8 1 knotepl 120 377 0 0 9 0 9 9 0 8 0 kqueuepl 224 1025 0 1017 21 20 1 5 0 8 0 pipepl 336 1223 0 1195 32 29 3 8 0 8 0 fdescpl 496 5882 0 5857 5 1 4 5 0 8 0 filepl 152 47908 0 47650 106 96 10 23 0 8 0 lockfpl 104 1429 0 1427 2 1 1 2 0 8 0 lockfspl 48 451 0 449 1 0 1 1 0 8 0 sessionpl 144 49 0 31 1 0 1 1 0 8 0 pgrppl 48 101 0 83 1 0 1 1 0 8 0 ucredpl 104 3965 0 3950 1 0 1 1 0 8 0 zombiepl 144 5878 0 5877 3 2 1 1 0 8 0 processpl 1064 5941 0 5877 5 0 5 5 0 8 0 procpl 672 14733 0 14661 13 5 8 9 0 8 0 srpgc 96 50 0 50 8 8 0 1 0 8 0 sosppl 168 52 0 52 5 5 0 1 0 8 0 sockpl 504 8252 0 8221 228 224 4 34 0 8 0 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 217 0 0 22 1 21 22 0 8 0 mtagpl 96 590 0 0 11 0 11 11 0 8 0 mbufpl 256 1463 0 0 83 0 83 83 0 8 0 bufpl 288 18159 0 11830 453 0 453 453 0 8 0 anonpl 24 1103416 0 1089082 156 41 115 132 0 186 0 amapchunkpl 152 93997 0 93343 50 19 31 38 0 158 0 amappl16 200 15598 0 15009 72 38 34 46 0 8 1 amappl15 192 1799 0 1799 2 1 1 1 0 8 1 amappl14 184 759 0 757 1 0 1 1 0 8 0 amappl13 176 1313 0 1309 1 0 1 1 0 8 0 amappl12 168 109 0 106 1 0 1 1 0 8 0 amappl11 160 262 0 242 1 0 1 1 0 8 0 amappl10 152 181 0 173 1 0 1 1 0 8 0 amappl9 144 1596 0 1590 1 0 1 1 0 8 0 amappl8 136 1604 0 1540 3 0 3 3 0 8 0 amappl7 128 813 0 800 1 0 1 1 0 8 0 amappl6 120 1459 0 1440 2 1 1 2 0 8 0 amappl5 112 4406 0 4389 1 0 1 1 0 8 0 amappl4 104 1972 0 1944 2 1 1 2 0 8 0 amappl3 96 16921 0 16872 2 0 2 2 0 8 0 amappl2 88 7497 0 7439 3 1 2 3 0 8 0 amappl1 80 139847 0 139269 20 5 15 20 0 8 0 amappl 88 31951 0 31747 7 1 6 6 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 71 0 12 2 0 2 2 0 8 0 uaddrrnd 24 5939 0 5864 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5939 0 5864 1 0 1 1 0 8 0 vmmpekpl 168 46213 0 46150 4 0 4 4 0 8 0 vmmpepl 168 574003 0 571652 203 71 132 142 0 357 4 vmsppl 368 5938 0 5864 9 1 8 8 0 8 0 rwobjpl 56 143767 0 136154 116 6 110 113 0 8 0 pdppl 4096 11885 0 11778 372 259 113 119 0 8 6 pvpl 32 2239961 0 2221762 338 152 186 257 0 265 0 pmappl 248 5938 0 5864 7 1 6 6 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1537 0 610 28 0 28 28 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(ffffffff825e324e) at panic+0x177 sys/kern/subr_prf.c:202 rw_enter(fffffd807e8fb218,1) at rw_enter+0x482 rw_enter_diag sys/kern/kern_rwlock.c:183 [inline] rw_enter(fffffd807e8fb218,1) at rw_enter+0x482 sys/kern/kern_rwlock.c:274 soshutdown(fffffd807e8fb210,0) at soshutdown+0x2f sys/kern/uipc_socket.c:1200 sys_shutdown(ffff800021305cf0,ffff80002478c578,ffff80002478c5c0) at sys_shutdown+0x63 sys/kern/uipc_syscalls.c:945 syscall(ffff80002478c640) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002478c640) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7997c738fb0, count: -7 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:178 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:178 end trace frame: 0x0, count: -5