zE1"\ܣ25Xu;e(2B[MDT=AK`_g 2tj"wire_count == 1" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 329 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *522478 40913 0 0x2 0x4000000 0 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff821e5fef,ffffffff821f8f2f,149,ffffffff821c22ed) at __assert+0x2b sys/kern/subr_prf.c:154 buf_free_pages(fffffd802c1ab900) at buf_free_pages+0x1ee sys/kern/vfs_biomem.c:318 buf_dealloc_mem(fffffd802c1ab900) at buf_dealloc_mem+0xe1 sys/kern/vfs_biomem.c:194 buf_put(fffffd802c1ab900) at buf_put+0x16b sys/kern/vfs_bio.c:131 brelse(fffffd802c1ab900) at brelse+0x257 sys/kern/vfs_bio.c:922 vinvalbuf(fffffd802b3eb428,2,fffffd803f7c6900,ffff8000ffff53d0,0,ffffffffffffffff) at vinvalbuf+0x3b1 sys/kern/vfs_subr.c:1977 ffs_truncate(fffffd803b8452e0,0,4,fffffd803f7c6900) at ffs_truncate+0xeb1 sys/ufs/ffs/ffs_inode.c:326 ufs_rmdir(ffff8000148fdfc8) at ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357 VOP_RMDIR(fffffd803672d4f0,fffffd802b3eb428,ffff8000148fe0c8) at VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 dounlinkat(ffff8000ffff53d0,9,c001fcaca0,8) at dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818 syscall(ffff8000148fe240) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,145,c00002a000,145,100,65) at Xsyscall+0x128 end of kernel end trace frame: 0xc002a4b978, count: 1 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel diagnostic assertion "pg->wire_count == 1" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 329 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff821e5fef,ffffffff821f8f2f,149,ffffffff821c22ed) at __assert+0x2b sys/kern/subr_prf.c:154 buf_free_pages(fffffd802c1ab900) at buf_free_pages+0x1ee sys/kern/vfs_biomem.c:318 buf_dealloc_mem(fffffd802c1ab900) at buf_dealloc_mem+0xe1 sys/kern/vfs_biomem.c:194 buf_put(fffffd802c1ab900) at buf_put+0x16b sys/kern/vfs_bio.c:131 brelse(fffffd802c1ab900) at brelse+0x257 sys/kern/vfs_bio.c:922 vinvalbuf(fffffd802b3eb428,2,fffffd803f7c6900,ffff8000ffff53d0,0,ffffffffffffffff) at vinvalbuf+0x3b1 sys/kern/vfs_subr.c:1977 ffs_truncate(fffffd803b8452e0,0,4,fffffd803f7c6900) at ffs_truncate+0xeb1 sys/ufs/ffs/ffs_inode.c:326 ufs_rmdir(ffff8000148fdfc8) at ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357 VOP_RMDIR(fffffd803672d4f0,fffffd802b3eb428,ffff8000148fe0c8) at VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 dounlinkat(ffff8000ffff53d0,9,c001fcaca0,8) at dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818 syscall(ffff8000148fe240) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,145,c00002a000,145,100,65) at Xsyscall+0x128 end of kernel end trace frame: 0xc002a4b978, count: -14 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff8000148fdaa0 rbx 0xffff8000148fdb50 rdx 0x2 rcx 0 rax 0 r8 0xffff8000148fda60 r9 0x1 r10 0 r11 0xbf017fc49bfc9b10 r12 0x3000000008 r13 0xffff8000148fdab0 r14 0x100 r15 0x1 rip 0xffffffff814f24f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000148fda90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-fuzzer) pid=522478 stat=onproc flags process=2 proc=4000000 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff49f0,0xffff8000ffff5658 process=0xffff8000148a2018 user=0xffff8000148f9000, vmspace=0xfffffd803f014550 estcpu=36, cpticks=2, pctcpu=0.20 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 62859 378183 84374 0 3 0x80 nanosleep syz-executor.1 62859 487905 84374 0 3 0x4000080 nanosleep syz-executor.1 62859 449109 84374 0 3 0x4000080 fsleep syz-executor.1 84374 143573 40913 0 3 0x82 nanosleep syz-executor.1 81434 175601 1 0 3 0x100083 ttyin getty 22493 192175 0 0 3 0x14200 acct acct 55424 139126 0 0 3 0x14200 bored sosplice 40913 19595 63627 0 3 0x82 thrsleep syz-fuzzer 40913 91393 63627 0 3 0x4000082 nanosleep syz-fuzzer 40913 279409 63627 0 3 0x4000082 thrsleep syz-fuzzer *40913 522478 63627 0 7 0x4000002 syz-fuzzer 40913 391804 63627 0 3 0x4000082 thrsleep syz-fuzzer 40913 185221 63627 0 3 0x4000082 thrsleep syz-fuzzer 40913 461237 63627 0 3 0x4000082 thrsleep syz-fuzzer 40913 324924 63627 0 3 0x4000082 thrsleep syz-fuzzer 63627 391470 11090 0 3 0x10008a pause ksh 11090 31566 47407 0 3 0x92 select sshd 47407 443767 1 0 3 0x80 select sshd 80760 143527 84482 73 3 0x100090 kqread syslogd 84482 60914 1 0 3 0x100082 netio syslogd 8912 23579 1 77 3 0x100090 poll dhclient 57115 121381 1 0 3 0x80 poll dhclient 35299 6123 0 0 3 0x14200 pgzero zerothread 10726 275992 0 0 3 0x14200 aiodoned aiodoned 2001 192100 0 0 3 0x14200 syncer update 17269 315010 0 0 3 0x14200 cleaner cleaner 61382 357992 0 0 3 0x14200 reaper reaper 83492 351756 0 0 3 0x14200 pgdaemon pagedaemon 28537 283188 0 0 3 0x14200 bored crynlk 68965 68732 0 0 3 0x14200 bored crypto 36869 376917 0 0 3 0x40014200 acpi0 acpi0 18834 131419 0 0 3 0x14200 bored softnet 15023 516095 0 0 3 0x14200 bored systqmp 55889 127471 0 0 3 0x14200 bored systq 51206 184762 0 0 3 0x40014200 bored softclock 2695 72627 0 0 3 0x40014200 idle0 3449 239483 0 0 3 0x14200 bored smr 1 105639 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9572 7005K 8352K 78643K 17939 0 0 pcb 13 10K 12K 78643K 1451 0 0 rtable 117 8K 8K 78643K 2254 0 0 ifaddr 79 19K 20K 78643K 639 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 233 0 0 iov 0 0K 24K 78643K 1407 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1226 77K 77K 78643K 4007 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 40 0 0 VM map 8 2K 2K 78643K 18 0 0 sem 12 1K 1K 78643K 358 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 4 9K 25K 78643K 3002 0 0 sigio 0 0K 0K 78643K 77 0 0 proc 49 38K 62K 78643K 1575 0 0 subproc 16 1K 2K 78643K 408 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 317 0 0 in_multi 33 2K 2K 78643K 402 0 0 ether_multi 1 0K 0K 78643K 24 0 0 mrt 0 0K 0K 78643K 15 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 180 795K 795K 78643K 180 0 0 exec 0 0K 1K 78643K 773 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 124 48K 67K 78643K 8942 0 0 UVM aobj 130 8K 8K 78643K 142 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 598 0 0 NDP 18 0K 0K 78643K 209 0 0 temp 196 3543K 4184K 78643K 161255 0 0 kqueue 0 0K 0K 78643K 42 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 84 0 78 1 0 1 1 0 8 0 rtpcb 80 296 0 294 1 0 1 1 0 8 0 rtentry 112 391 0 347 2 0 2 2 0 8 0 unpcb 120 3638 0 3623 19 17 2 4 0 8 1 syncache 264 17 0 17 8 8 0 1 0 8 0 tcpqe 32 167 0 167 5 5 0 1 0 8 0 tcpcb 544 3730 0 3726 41 39 2 15 0 8 1 ipq 40 41 0 41 15 14 1 1 0 8 1 ipqe 40 708 0 708 15 14 1 1 0 8 1 inpcb 280 6898 0 6889 28 25 3 9 0 8 2 rttmr 72 3 0 3 3 3 0 1 0 8 0 nd6 48 56 0 52 2 1 1 1 0 8 0 pkpcb 40 10 0 10 4 4 0 1 0 8 0 swfcl 56 3 0 0 1 0 1 1 0 8 0 ppxss 1128 63 0 63 12 11 1 1 0 8 1 art_heap8 4096 10 0 9 4 3 1 3 0 8 0 art_heap4 256 1689 0 1469 32 18 14 15 0 8 0 art_table 32 1699 0 1478 2 0 2 2 0 8 0 art_node 16 390 0 350 1 0 1 1 0 8 0 sysvmsgpl 40 55 0 22 1 0 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 356 0 346 1 0 1 1 0 8 0 shmpl 112 140 0 12 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 7556 0 6152 46 0 46 46 0 8 0 ffsino 240 7556 0 6152 84 0 84 84 0 8 0 nchpl 144 12000 0 11491 61 41 20 60 0 8 0 uvmvnodes 72 6787 0 0 124 0 124 124 0 8 0 vnodes 208 6787 0 0 358 0 358 358 0 8 0 namei 1024 45650 0 45650 2 1 1 1 0 8 1 vcpupl 1984 6 0 0 1 0 1 1 0 8 0 vmpool 520 16 0 10 2 1 1 1 0 8 0 scsiplug 64 3 0 3 3 3 0 1 0 8 0 scxspl 192 48300 0 48300 27 26 1 7 0 8 1 plimitpl 152 258 0 252 1 0 1 1 0 8 0 sigapl 432 3111 0 3099 2 0 2 2 0 8 0 futexpl 56 125331 0 125330 2 1 1 1 0 8 0 knotepl 112 908 0 889 2 1 1 2 0 8 0 kqueuepl 104 994 0 992 7 6 1 4 0 8 0 pipepl 112 1822 0 1807 5 4 1 2 0 8 0 fdescpl 424 3112 0 3099 2 0 2 2 0 8 0 filepl 120 29774 0 29698 30 26 4 11 0 8 0 lockfpl 104 1093 0 1092 1 0 1 1 0 8 0 lockfspl 48 397 0 396 1 0 1 1 0 8 0 sessionpl 112 43 0 34 1 0 1 1 0 8 0 pgrppl 48 73 0 64 1 0 1 1 0 8 0 ucredpl 96 2852 0 2845 1 0 1 1 0 8 0 zombiepl 144 3100 0 3100 1 0 1 1 0 8 1 processpl 864 3129 0 3100 4 0 4 4 0 8 0 procpl 632 7090 0 7052 5 1 4 5 0 8 0 sosppl 128 45 0 45 12 12 0 1 0 8 0 sockpl 384 10889 0 10865 56 50 6 14 0 8 2 mcl64k 65536 1128 0 1126 96 83 13 33 0 8 12 mcl16k 16384 78 0 78 10 9 1 1 0 8 1 mcl12k 12288 88 0 88 11 10 1 1 0 8 1 mcl9k 9216 58 0 58 13 12 1 1 0 8 1 mcl8k 8192 178 0 178 6 5 1 1 0 8 1 mcl4k 4096 350 0 350 4 3 1 1 0 8 1 mcl2k2 2112 41 0 41 15 14 1 1 0 8 1 mcl2k 2048 71970 0 71923 23 16 7 18 0 8 0 mtagpl 80 146 0 145 6 5 1 1 0 8 0 mbufpl 256 148277 0 148177 105 87 18 37 0 8 8 bufpl 256 21059 0 14055 438 0 438 438 0 8 0 anonpl 16 461689 0 443421 169 78 91 95 0 62 11 amapchunkpl 152 19863 0 19746 81 71 10 19 0 158 4 amappl16 192 20332 0 19245 192 130 62 67 0 8 6 amappl15 184 2158 0 2158 2 2 0 1 0 8 0 amappl14 176 433 0 428 1 0 1 1 0 8 0 amappl13 168 414 0 413 1 0 1 1 0 8 0 amappl12 160 156 0 152 2 1 1 1 0 8 0 amappl11 152 330 0 319 1 0 1 1 0 8 0 amappl10 144 312 0 309 1 0 1 1 0 8 0 amappl9 136 1003 0 997 1 0 1 1 0 8 0 amappl8 128 542 0 497 2 0 2 2 0 8 0 amappl7 120 425 0 416 1 0 1 1 0 8 0 amappl6 112 289 0 278 1 0 1 1 0 8 0 amappl5 104 569 0 559 1 0 1 1 0 8 0 amappl4 96 3681 0 3656 1 0 1 1 0 8 0 amappl3 88 623 0 617 1 0 1 1 0 8 0 amappl2 80 23947 0 23883 3 1 2 3 0 8 0 amappl1 72 69378 0 68973 27 18 9 20 0 8 0 amappl 80 7715 0 7676 3 2 1 2 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 141 0 12 3 0 3 3 0 8 0 uaddrrnd 24 3128 0 3099 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3128 0 3099 1 0 1 1 0 8 0 vmmpekpl 168 23928 0 23893 2 0 2 2 0 8 0 vmmpepl 168 397801 0 395691 274 136 138 148 0 357 35 vmsppl 272 3111 0 3099 4 3 1 2 0 8 0 pdppl 4096 6262 0 6224 8 2 6 6 0 8 0 pvpl 32 1185826 0 1164368 461 169 292 325 0 265 103 pmappl 200 3127 0 3109 2 0 2 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 862 0 271 18 0 18 18 0 8 0