login: uvm_fault(0xfffffd806e7e35c8, 0x25e, 0, 1) -> e kernel: page fault trap, code=0 Stopped at kqueue_scan+0x47f: movq 0x18(%rax),%r11 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xfffffd806e7e35c8, 0x25e, 0, 1) -> e kqueue_scan(fffffd806e81fdd0,40,c00013f698,ffff800020b49690,ffff800020a5e280,ffff800020b496dc) at kqueue_scan+0x47f sys/kern/kern_event.c:771 end trace frame: 0xffff800020b49740, count: 0 ddb{0}> trace kqueue_scan(fffffd806e81fdd0,40,c00013f698,ffff800020b49690,ffff800020a5e280,ffff800020b496dc) at kqueue_scan+0x47f sys/kern/kern_event.c:771 sys_kevent(ffff800020a5e280,ffff800020b49750,ffff800020b497a0) at sys_kevent+0x48b sys/kern/kern_event.c:553 syscall(ffff800020b49820) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b49820) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,48,c00013f680,48,ffffffffffffffff,4) at Xsyscall+0x128 end of kernel end trace frame: 0xc00013fe98, count: -4 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800020b49580 rbx 0 rdx 0xffff800020b49438 rcx 0 rax 0x246 r8 0xffff800020a5e280 r9 0xffff800020b496dc r10 0xff8058dc5f9f37ce r11 0x7fa723dd8dcca9 r12 0x1 r13 0xfffffd806e81fdd0 r14 0xffff800020b03780 r15 0xffff800020b03768 rip 0xffffffff820b8bbf kqueue_scan+0x47f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020b49330 ss 0x10 kqueue_scan+0x47f: movq 0x18(%rax),%r11 ddb{0}> show proc PROC (syz-fuzzer) pid=167367 stat=onproc flags process=2 proc=4000000 pri=17, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a5e4f8,0xffff800020a5e9f8 process=0xffff800020a8b890 user=0xffff800020b44000, vmspace=0xfffffd806e7e35c8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78897 311149 1 0 3 0x100083 ttyin getty 98503 254644 74077 0 3 0x2 biowait syz-executor.0 10217 419976 0 0 3 0x14200 acct acct 64167 154049 0 0 3 0x14200 bored sosplice 74077 180752 16580 0 2 0x3 syz-fuzzer 74077 290001 16580 0 2 0x4000003 syz-fuzzer 74077 214277 16580 0 3 0x4000082 thrsleep syz-fuzzer 74077 480247 16580 0 2 0x4000003 syz-fuzzer 74077 305080 16580 0 3 0x4000082 thrsleep syz-fuzzer *74077 167367 16580 0 7 0x4000002 syz-fuzzer 74077 172928 16580 0 3 0x4000082 thrsleep syz-fuzzer 74077 245248 16580 0 3 0x4000082 thrsleep syz-fuzzer 74077 247931 16580 0 3 0x4000082 thrsleep syz-fuzzer 74077 217174 16580 0 3 0x4000082 thrsleep syz-fuzzer 16580 5933 59025 0 3 0x10008a pause ksh 59025 239343 97136 0 3 0x92 select sshd 97136 29512 1 0 3 0x80 select sshd 38468 410760 17354 74 3 0x100092 bpf pflogd 17354 495564 1 0 3 0x80 netio pflogd 72001 295608 43049 73 3 0x100090 kqread syslogd 43049 280606 1 0 3 0x100082 netio syslogd 44986 67248 1 77 3 0x100090 poll dhclient 97921 33673 1 0 3 0x80 poll dhclient 10521 121928 0 0 3 0x14200 pgzero zerothread 86389 452609 0 0 3 0x14200 aiodoned aiodoned 80705 391633 0 0 3 0x14200 syncer update 89400 108133 0 0 3 0x14200 cleaner cleaner 8115 260378 0 0 7 0x14200 reaper 19313 175365 0 0 3 0x14200 pgdaemon pagedaemon 1288 104782 0 0 3 0x14200 bored crynlk 59234 221284 0 0 3 0x14200 bored crypto 71585 145833 0 0 3 0x40014200 acpi0 acpi0 10565 228537 0 0 3 0x40014200 idle1 96647 276797 0 0 3 0x14200 bored softnet 74881 229835 0 0 3 0x14200 bored systqmp 47571 365125 0 0 3 0x14200 bored systq 16670 351451 0 0 3 0x40014200 bored softclock 12929 421052 0 0 3 0x40014200 idle0 42936 56716 0 0 3 0x14200 bored smr 1 364181 0 0 2 0x82 init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 98503 (syz-executor.0) thread 0xffff800020ab1b40 (254644) exclusive rrwlock inode r = 0 (0xfffffd806e1abf88) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:562 #5 uvm_vnp_uncache+0xe6 sys/uvm/uvm_vnode.c:1334 #6 dounlinkat+0x17b sys/kern/vfs_syscalls.c:1821 #7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #8 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ec48918) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:562 #5 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 cache_lookup+0x2bb sys/kern/vfs_cache.c:224 #7 ufs_lookup+0x1bc sys/ufs/ufs/ufs_lookup.c:162 #8 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91 #9 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #10 namei+0x63c sys/kern/vfs_lookup.c:249 #11 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785 #12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #13 Xsyscall+0x128 Process 74077 (syz-fuzzer) thread 0xffff800020a5e280 (167367) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82676880) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x113 sys/kern/kern_synch.c:373 #4 tsleep+0x198 sleep_finish_timeout sys/kern/kern_synch.c:397 [inline] #4 tsleep+0x198 sleep_finish_all sys/kern/kern_synch.c:183 [inline] #4 tsleep+0x198 sys/kern/kern_synch.c:152 #5 getblk+0x14c sys/kern/vfs_bio.c:993 #6 bread+0x3a bio_doread sys/kern/vfs_bio.c:435 [inline] #6 bread+0x3a sys/kern/vfs_bio.c:480 #7 ffs1_balloc+0x123e sys/ufs/ffs/ffs_balloc.c:364 #8 ffs_write+0x3c1 sys/ufs/ffs/ffs_vnops.c:345 #9 VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269 #10 ktrwriteraw+0x148 sys/kern/kern_ktrace.c:653 #11 ktrstruct+0x169 ktrwrite2 sys/kern/kern_ktrace.c:620 [inline] #11 ktrstruct+0x169 sys/kern/kern_ktrace.c:306 #12 sys_kevent+0x14a sys/kern/kern_event.c:505 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #14 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9599 7075K 8154K 78643K 15217 0 0 pcb 13 10K 12K 78643K 406 0 0 rtable 104 13K 14K 78643K 1504 0 0 ifaddr 79 16K 18K 78643K 457 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1540 0 0 iov 0 0K 32K 78643K 401 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1224 77K 78K 78643K 3129 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 32 0 0 VM map 2 1K 1K 78643K 17 0 0 sem 12 0K 1K 78643K 395 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 3 5K 25K 78643K 2009 0 0 sigio 0 0K 0K 78643K 37 0 0 proc 62 63K 95K 78643K 1070 0 0 subproc 16 1K 2K 78643K 208 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 140 0 0 in_multi 19 1K 2K 78643K 248 0 0 ether_multi 1 0K 0K 78643K 20 0 0 mrt 0 0K 0K 78643K 21 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 192 848K 848K 78643K 192 0 0 exec 0 0K 1K 78643K 555 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 122 22K 31K 78643K 8587 0 0 UVM aobj 130 4K 4K 78643K 139 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 363 0 0 NDP 19 0K 0K 78643K 141 0 0 temp 221 3560K 4199K 78643K 48302 0 0 kqueue 0 0K 0K 78643K 45 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 54 0 48 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 147 0 145 1 0 1 1 0 8 0 rtentry 112 249 0 213 2 0 2 2 0 8 0 unpcb 120 840 0 829 3 2 1 2 0 8 0 syncache 264 18 0 18 7 7 0 1 0 8 0 tcpqe 32 7052 0 7052 2 2 0 1 0 8 0 tcpcb 544 674 0 670 2 1 1 2 0 8 0 inpcb 280 2653 0 2644 26 25 1 13 0 8 0 rttmr 72 5 0 5 4 4 0 1 0 8 0 nd6 48 31 0 30 1 0 1 1 0 8 0 pkpcb 40 17 0 17 8 8 0 1 0 8 0 ppxss 1128 65 0 65 16 16 0 1 0 8 0 pffrag 232 37 0 37 12 12 0 1 0 482 0 pffrnode 88 37 0 37 12 12 0 1 0 8 0 pffrent 40 472 0 472 12 12 0 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 24 169 0 161 1 0 1 1 0 8 0 pfstkey 112 169 0 161 2 0 2 2 0 8 0 pfstate 328 169 0 161 4 3 1 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 3 0 2 3 2 1 3 0 8 0 art_heap4 256 1020 0 850 25 12 13 15 0 8 0 art_table 32 1023 0 852 2 0 2 2 0 8 0 art_node 16 247 0 213 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 6 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 393 0 383 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4593 0 3194 46 0 46 46 0 8 0 ffsino 272 4593 0 3194 95 1 94 95 0 8 0 nchpl 144 8162 0 6548 61 0 61 61 0 8 0 uvmvnodes 72 5910 0 0 108 0 108 108 0 8 0 vnodes 208 5910 0 0 312 0 312 312 0 8 0 namei 1024 29160 0 29160 4 3 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 15 0 15 7 7 0 1 0 8 0 scsiplug 64 4 0 4 3 3 0 1 0 8 0 scxspl 192 22774 0 22771 28 27 1 7 0 8 0 plimitpl 152 162 0 154 1 0 1 1 0 8 0 sigapl 432 2180 0 2166 5 3 2 3 0 8 0 futexpl 56 39484 0 39484 1 0 1 1 0 8 1 knotepl 112 957 0 938 2 1 1 2 0 8 0 kqueuepl 104 1392 0 1390 1 0 1 1 0 8 0 pipepl 112 1786 0 1770 9 8 1 2 0 8 0 fdescpl 488 2181 0 2167 3 0 3 3 0 8 0 filepl 152 20304 0 20223 35 30 5 13 0 8 0 lockfpl 104 800 0 799 1 0 1 1 0 8 0 lockfspl 48 288 0 287 1 0 1 1 0 8 0 sessionpl 112 29 0 18 1 0 1 1 0 8 0 pgrppl 48 47 0 36 1 0 1 1 0 8 0 ucredpl 96 4604 0 4595 1 0 1 1 0 8 0 zombiepl 144 2168 0 2166 4 3 1 1 0 8 0 processpl 896 2199 0 2166 5 1 4 5 0 8 0 procpl 632 7273 0 7231 5 0 5 5 0 8 0 srpgc 64 14 0 14 5 5 0 1 0 8 0 sosppl 128 11 0 11 5 5 0 1 0 8 0 sockpl 384 3705 0 3685 40 37 3 22 0 8 0 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 14 0 0 2 0 2 2 0 8 0 mcl9k 9216 9 0 0 1 0 1 1 0 8 0 mcl8k 8192 18 0 0 3 1 2 3 0 8 0 mcl4k 4096 25 0 0 3 1 2 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 210 0 0 21 7 14 21 0 8 0 mtagpl 80 81 0 0 1 0 1 1 0 8 0 mbufpl 256 612 0 0 31 0 31 31 0 8 0 bufpl 256 11285 0 4237 441 0 441 441 0 8 0 anonpl 16 346813 0 330008 112 35 77 85 0 124 0 amapchunkpl 152 15369 0 15253 34 28 6 13 0 158 0 amappl16 192 18236 0 17196 111 56 55 66 0 8 0 amappl15 184 8 0 8 1 1 0 1 0 8 0 amappl14 176 381 0 379 2 1 1 1 0 8 0 amappl13 168 308 0 307 2 1 1 1 0 8 0 amappl12 160 301 0 298 2 1 1 1 0 8 0 amappl11 152 890 0 875 1 0 1 1 0 8 0 amappl10 144 29 0 24 1 0 1 1 0 8 0 amappl9 136 883 0 875 1 0 1 1 0 8 0 amappl8 128 429 0 392 2 0 2 2 0 8 0 amappl7 120 97 0 89 1 0 1 1 0 8 0 amappl6 112 907 0 894 1 0 1 1 0 8 0 amappl5 104 506 0 489 1 0 1 1 0 8 0 amappl4 96 2233 0 2206 1 0 1 1 0 8 0 amappl3 88 932 0 925 1 0 1 1 0 8 0 amappl2 80 15888 0 15818 4 2 2 3 0 8 0 amappl1 72 59379 0 58941 27 17 10 20 0 8 0 amappl 80 7682 0 7641 4 2 2 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 64 138 0 9 3 0 3 3 0 8 0 uaddrrnd 24 2196 0 2165 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2196 0 2165 1 0 1 1 0 8 0 vmmpekpl 168 24560 0 24527 2 0 2 2 0 8 0 vmmpepl 168 289398 0 287214 303 200 103 142 0 357 0 vmsppl 368 2180 0 2165 2 0 2 2 0 8 0 pdppl 4096 4399 0 4360 7 2 5 6 0 8 0 pvpl 32 938834 0 918340 335 149 186 210 0 265 7 pmappl 232 2195 0 2180 12 11 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 647 0 33 18 0 18 18 0 8 0