login: panic: rw_enter: netlock locking against myself Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 494976 39781 0 0 0x4000000 0 syz-executor.0 *397038 39781 0 0 0x4000000 1K syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff822277f7) at panic+0x15c sys/kern/subr_prf.c:207 rw_enter(ffffffff825310b8,1) at rw_enter+0x518 sys/kern/kern_rwlock.c:173 solock(fffffd806bdedc90) at solock+0x5a sys/kern/uipc_socket2.c:282 soclose(fffffd806bdedc90,0) at soclose+0x2f sys/kern/uipc_socket.c:290 soo_close(fffffd806d1894d0,ffff800020ec64f8) at soo_close+0x40 fdrop(fffffd806d1894d0,ffff800020ec64f8) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 sosplice(fffffd806eb64c88,3,0,0) at sosplice+0x475 sosetopt(fffffd806eb64c88,ffff,1023,fffffd8070ca4600) at sosetopt+0x830 sys_setsockopt(ffff800020ec64f8,ffff800020f85348,ffff800020f85390) at sys_setsockopt+0x215 sys/kern/uipc_syscalls.c:965 syscall(ffff800020f85410) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020f85410) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x381ca3863e0, count: 3 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 rw_enter: netlock locking against myself ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff822277f7) at panic+0x15c sys/kern/subr_prf.c:207 rw_enter(ffffffff825310b8,1) at rw_enter+0x518 sys/kern/kern_rwlock.c:173 solock(fffffd806bdedc90) at solock+0x5a sys/kern/uipc_socket2.c:282 soclose(fffffd806bdedc90,0) at soclose+0x2f sys/kern/uipc_socket.c:290 soo_close(fffffd806d1894d0,ffff800020ec64f8) at soo_close+0x40 fdrop(fffffd806d1894d0,ffff800020ec64f8) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 sosplice(fffffd806eb64c88,3,0,0) at sosplice+0x475 sosetopt(fffffd806eb64c88,ffff,1023,fffffd8070ca4600) at sosetopt+0x830 sys_setsockopt(ffff800020ec64f8,ffff800020f85348,ffff800020f85390) at sys_setsockopt+0x215 sys/kern/uipc_syscalls.c:965 syscall(ffff800020f85410) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020f85410) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x381ca3863e0, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020f84f50 rbx 0xffff800020f85000 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8178384f kprintf+0x16f r9 0x1 r10 0x4274c828e8ea3f95 r11 0xdceaf1e9746fcff5 r12 0x3000000008 r13 0xffff800020f84f60 r14 0x100 r15 0x1 rip 0xffffffff819f29d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020f84f40 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=397038 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec6768,0xffff800020ec7618 process=0xffff800020e923f8 user=0xffff800020f80000, vmspace=0xfffffd807efff2e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18043 112462 58225 0 2 0 syz-executor.1 18043 69652 58225 0 3 0x4000000 biowait syz-executor.1 39781 125522 97715 0 2 0 syz-executor.0 39781 494976 97715 0 7 0x4000000 syz-executor.0 *39781 397038 97715 0 7 0x4000000 syz-executor.0 73628 109003 0 0 3 0x14200 bored sosplice 58225 146735 37483 0 3 0x82 nanosleep syz-executor.1 97715 21782 37483 0 3 0x82 nanosleep syz-executor.0 37483 465442 86486 0 3 0x82 thrsleep syz-execprog 37483 252417 86486 0 3 0x4000082 thrsleep syz-execprog 37483 490186 86486 0 3 0x4000082 thrsleep syz-execprog 37483 162708 86486 0 3 0x4000082 thrsleep syz-execprog 37483 172525 86486 0 3 0x4000082 thrsleep syz-execprog 37483 168708 86486 0 3 0x4000082 kqread syz-execprog 37483 236979 86486 0 3 0x4000082 thrsleep syz-execprog 37483 10766 86486 0 3 0x4000082 thrsleep syz-execprog 37483 414489 86486 0 3 0x4000082 thrsleep syz-execprog 86486 18340 34670 0 3 0x10008a pause ksh 34670 275753 76058 0 3 0x92 select sshd 91621 152391 1 0 3 0x100083 ttyin getty 76058 344672 1 0 3 0x80 select sshd 92666 448396 47579 74 3 0x100092 bpf pflogd 47579 25173 1 0 3 0x80 netio pflogd 97733 482092 7739 73 3 0x100090 kqread syslogd 7739 273638 1 0 3 0x100082 netio syslogd 65424 171159 1 77 3 0x100090 poll dhclient 8263 222079 1 0 3 0x80 poll dhclient 40252 148762 0 0 3 0x14200 bored smr 77488 389073 0 0 2 0x14200 zerothread 57064 43438 0 0 3 0x14200 aiodoned aiodoned 32801 371001 0 0 3 0x14200 syncer update 12474 502643 0 0 3 0x14200 cleaner cleaner 83231 215732 0 0 3 0x14200 reaper reaper 61647 37901 0 0 3 0x14200 pgdaemon pagedaemon 60611 216570 0 0 3 0x14200 bored crynlk 62037 278992 0 0 3 0x14200 bored crypto 77208 519643 0 0 3 0x40014200 acpi0 acpi0 65680 484914 0 0 3 0x40014200 idle1 65305 365760 0 0 3 0x14200 bored softnet 75049 460865 0 0 3 0x14200 bored systqmp 8321 362535 0 0 3 0x14200 bored systq 58785 159793 0 0 3 0x40014200 bored softclock 99628 68122 0 0 3 0x40014200 idle0 1 29600 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 18043 (syz-executor.1) thread 0xffff800020ec7608 (69652) exclusive rrwlock inode r = 0 (0xfffffd806bdeeb40) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_makeinode+0xaa sys/ufs/ufs/ufs_vnops.c:1830 #7 ufs_mknod+0x4e sys/ufs/ufs/ufs_vnops.c:172 #8 VOP_MKNOD+0xc6 sys/kern/vfs_vops.c:134 #9 domknodat+0x31e sys/kern/vfs_syscalls.c:1633 #10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bdeea30) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domknodat+0x92 sys/kern/vfs_syscalls.c:1585 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 39781 (syz-executor.0) thread 0xffff800020ec64f8 (397038) exclusive rwlock netlock r = 0 (0xffffffff825310c8) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sys_setsockopt+0x1fa sys/kern/uipc_syscalls.c:964 #3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826739f0) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:570 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9471 6398K 6398K 78643K 10562 0 pcb 13 8K 8K 78643K 15 0 rtable 105 3K 3K 78643K 199 0 ifaddr 44 10K 10K 78643K 45 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1469 0 mount 1 1K 1K 78643K 1 0 vnodes 1185 75K 75K 78643K 2305 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 1809 196K 290K 78643K 12766 0 file desc 5 16K 24K 78643K 396 0 proc 59 63K 95K 78643K 438 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 33 2K 2K 78643K 33 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 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 210 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 83 20K 20K 78643K 2116 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 6 0K 0K 78643K 10 0 temp 33 3033K 3097K 78643K 2736 0 kqueue 3 4K 4K 78643K 3 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 arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 1485 0 1476 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 11 0 2 1 0 1 1 0 8 0 pfstkey 112 11 0 2 1 0 1 1 0 8 0 pfstate 328 11 0 2 1 0 1 1 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 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2567 0 1157 46 0 46 46 0 8 0 ffsino 272 2567 0 1157 95 0 95 95 0 8 0 nchpl 144 3150 0 1530 61 0 61 61 0 8 0 uvmvnodes 72 3279 0 0 60 0 60 60 0 8 0 vnodes 208 3279 0 0 173 0 173 173 0 8 0 namei 1024 7847 0 7846 2 1 1 1 0 8 0 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 192 7928 0 7927 9 8 1 7 0 8 0 plimitpl 152 16 0 8 1 0 1 1 0 8 0 sigapl 424 617 0 584 4 0 4 4 0 8 0 futexpl 56 2498 0 2498 1 0 1 1 0 8 1 knotepl 112 51 0 34 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 48 78 0 68 2 1 1 1 0 8 0 pipepl 120 156 0 137 2 1 1 1 0 8 0 fdescpl 496 601 0 584 3 0 3 3 0 8 0 filepl 152 3664 0 3593 3 0 3 3 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 584 0 584 2 1 1 1 0 8 1 processpl 984 617 0 584 5 0 5 5 0 8 0 procpl 624 1371 0 1327 4 0 4 4 0 8 0 sosppl 128 721 0 719 1 0 1 1 0 8 0 sockpl 400 1533 0 1512 3 0 3 3 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 56 0 0 7 0 7 7 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 145 0 0 8 0 8 8 0 8 0 bufpl 280 4115 0 174 282 0 282 282 0 8 0 anonpl 16 43273 0 41129 15 2 13 13 0 124 4 amapchunkpl 152 2907 0 2831 6 0 6 6 0 158 2 amappl16 192 1867 0 1792 4 0 4 4 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 7 0 5 2 1 1 1 0 8 0 amappl13 168 26 0 25 2 1 1 1 0 8 0 amappl12 160 191 0 187 2 1 1 1 0 8 0 amappl11 152 88 0 68 2 0 2 2 0 8 1 amappl10 144 15 0 13 1 0 1 1 0 8 0 amappl9 136 235 0 232 1 0 1 1 0 8 0 amappl8 128 290 0 280 1 0 1 1 0 8 0 amappl7 120 129 0 117 1 0 1 1 0 8 0 amappl6 112 27 0 21 1 0 1 1 0 8 0 amappl5 104 676 0 659 1 0 1 1 0 8 0 amappl4 96 529 0 500 2 0 2 2 0 8 1 amappl3 88 111 0 106 1 0 1 1 0 8 0 amappl2 80 3870 0 3794 4 1 3 3 0 8 1 amappl1 72 23171 0 22708 26 8 18 20 0 8 8 amappl 80 1612 0 1577 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 601 0 584 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 601 0 584 1 0 1 1 0 8 0 vmmpekpl 168 9206 0 9182 2 0 2 2 0 8 0 vmmpepl 168 63224 0 62070 94 14 80 80 0 357 29 vmsppl 368 600 0 584 2 0 2 2 0 8 0 pdppl 4096 1210 0 1168 6 0 6 6 0 8 0 pvpl 32 168813 0 164099 121 6 115 115 0 265 76 pmappl 232 600 0 584 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 149 0 4 5 0 5 5 0 8 0 ddb{1}>