uvm_fault(0xfffffd807efffa10, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at strlen+0x81: movq 0(%rax),%rdx ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel page fault uvm_fault(0xfffffd807efffa10, 0x0, 0, 1) -> e strlen() at strlen+0x81 end trace frame: 0xffff800024112100, count: 0 ddb{1}> trace strlen() at strlen+0x81 kern_sysctl(ffff800024112124,7,0,ffff800024112158,0,0) at kern_sysctl+0xc74 sys/kern/kern_sysctl.c:518 sys_sysctl(ffff800020e9e018,ffff8000241121c8,ffff800024112210) at sys_sysctl+0x209 sys/kern/kern_sysctl.c:250 syscall(ffff800024112290) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800024112290) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:568 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bbe949cc60, count: -5 ddb{1}> show registers rdi 0x5 rsi 0x1 rbp 0xffff800024111dd0 rbx 0x5 rdx 0xffff800021cf7000 rcx 0x128 rax 0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe49c4ea53864be7e r11 0x4bd91826425b47e8 r12 0 r13 0x19e r14 0x240 r15 0xffff800024112158 rip 0xffffffff814bc9e1 strlen+0x81 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800024111cf8 ss 0x10 strlen+0x81: movq 0(%rax),%rdx ddb{1}> show proc PROC (syz-executor.0) pid=140097 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e9e290,0xffffffff82888b38 process=0xffff800020eccfc8 user=0xffff80002410d000, vmspace=0xfffffd807efffa10 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51763 4270 6320 0 7 0 syz-executor.0 *51763 140097 6320 0 7 0x4000000 syz-executor.0 74288 124974 0 0 3 0x14200 acct acct 6320 63774 56034 0 3 0x82 nanosleep syz-executor.0 92569 217652 56034 0 3 0x2 biowait syz-executor.1 15691 475934 0 0 3 0x14200 bored sosplice 56034 4123 66339 0 3 0x82 thrsleep syz-fuzzer 56034 180637 66339 0 3 0x4000082 nanosleep syz-fuzzer 56034 420289 66339 0 3 0x4000082 thrsleep syz-fuzzer 56034 477690 66339 0 3 0x4000082 thrsleep syz-fuzzer 56034 411795 66339 0 3 0x4000082 nanosleep syz-fuzzer 56034 346764 66339 0 3 0x4000082 kqread syz-fuzzer 56034 157623 66339 0 3 0x4000082 thrsleep syz-fuzzer 56034 324654 66339 0 3 0x4000082 thrsleep syz-fuzzer 66339 149080 20213 0 3 0x10008a pause ksh 20213 431903 15179 0 3 0x92 select sshd 3639 470219 1 0 3 0x100083 ttyin getty 15179 200786 1 0 3 0x80 select sshd 23271 118201 51194 74 3 0x100092 bpf pflogd 51194 458136 1 0 3 0x80 netio pflogd 62471 15758 75031 73 3 0x100090 kqread syslogd 75031 396149 1 0 3 0x100082 netio syslogd 73947 266829 1 77 3 0x100090 poll dhclient 18146 514828 1 0 3 0x80 poll dhclient 32038 62610 0 0 3 0x14200 bored smr 51614 246733 0 0 3 0x14200 pgzero zerothread 89485 151511 0 0 3 0x14200 aiodoned aiodoned 1973 225738 0 0 3 0x14200 syncer update 91234 308954 0 0 3 0x14200 cleaner cleaner 42093 133610 0 0 3 0x14200 reaper reaper 11053 479665 0 0 3 0x14200 pgdaemon pagedaemon 30388 502915 0 0 3 0x14200 bored crynlk 99474 149020 0 0 3 0x14200 bored crypto 69263 290568 0 0 3 0x40014200 acpi0 acpi0 71420 371142 0 0 3 0x40014200 idle1 95187 130829 0 0 3 0x14200 bored softnet 31445 10603 0 0 3 0x14200 bored systqmp 68334 32577 0 0 3 0x14200 bored systq 63986 306044 0 0 3 0x40014200 bored softclock 23118 504498 0 0 3 0x40014200 idle0 1 403111 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 51763 (syz-executor.0) thread 0xffff800020e9e018 (140097) exclusive rwlock sysctlklk r = 0 (0xffffffff8271e3e0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 sysctl_malloc+0x1e7 sys/kern/kern_malloc.c:652 #3 kern_sysctl+0xc74 sys/kern/kern_sysctl.c:518 #4 sys_sysctl+0x209 sys/kern/kern_sysctl.c:250 #5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:568 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82888d68) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 syscall+0x3fd mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3fd sys/arch/amd64/amd64/trap.c:568 #2 Xsyscall+0x128 Process 92569 (syz-executor.1) thread 0xffff800020e9f8c8 (217652) exclusive rrwlock inode r = 0 (0xfffffd806e8102b8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 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+0x135 sys/ufs/ffs/ffs_vfsops.c:1350 #5 ffs_inode_alloc+0x1e1 sys/ufs/ffs/ffs_alloc.c:394 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3046 #9 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:568 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ae59a28) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 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+0x6c sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x5f7 sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3031 #8 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:568 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9525 6419K 7578K 78643K 15098 0 pcb 13 8K 8K 78643K 259 0 rtable 123 7K 9K 78643K 1084 0 ifaddr 77 15K 15K 78643K 359 0 counters 43 33K 34K 78643K 121 0 ioctlops 0 0K 4K 78643K 1775 0 iov 0 0K 16K 78643K 157 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 2644 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 30 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 490 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 4126 0 sigio 0 0K 0K 78643K 5 0 proc 63 63K 95K 78643K 882 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 281 0 in_multi 33 2K 2K 78643K 244 0 ether_multi 1 0K 0K 78643K 43 0 mrt 0 0K 0K 78643K 77 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 2K 78643K 528 0 pfkey data 0 0K 0K 78643K 5 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 158 29K 43K 78643K 10328 0 UVM aobj 36 2K 2K 78643K 46 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 159 0 NDP 13 0K 0K 78643K 71 0 temp 135 3964K 4029K 78643K 65938 0 kqueue 3 4K 16K 78643K 193 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 10 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 96 121 0 119 1 0 1 1 0 8 0 rtentry 112 107 0 63 2 0 2 2 0 8 0 unpcb 120 1016 0 1002 1 0 1 1 0 8 0 syncache 272 63 0 63 5 5 0 1 0 8 0 tcpqe 32 47 0 47 4 4 0 1 0 8 0 tcpcb 592 840 0 824 14 12 2 5 0 8 0 inpcb 296 2035 0 2028 6 4 2 3 0 8 1 rttmr 72 29 0 29 3 3 0 1 0 8 0 nd6 48 23 0 17 1 0 1 1 0 8 0 pkpcb 40 49 0 49 5 5 0 1 0 8 0 kcovpl 48 4 0 2 1 0 1 1 0 8 0 ppxss 1128 4 0 4 1 1 0 1 0 8 0 pffrag 232 10 0 10 2 2 0 1 0 482 0 pffrnode 88 10 0 10 2 2 0 1 0 8 0 pffrent 40 20 0 20 2 2 0 1 0 8 0 pfosfp 40 850 0 423 5 0 5 5 0 8 0 pfosfpen 112 1461 0 714 22 0 22 22 0 8 0 pfrktable 1344 162 0 155 1 0 1 1 0 8 0 pftag 88 4 0 4 1 1 0 1 0 8 0 pfstitem 24 12 0 10 1 0 1 1 0 8 0 pfstkey 112 12 0 10 1 0 1 1 0 8 0 pfstate 328 12 0 10 1 0 1 1 0 8 0 pfrule 1360 74 0 59 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 279 0 88 12 0 12 12 0 8 0 art_table 32 280 0 88 2 0 2 2 0 8 0 art_node 16 106 0 66 1 0 1 1 0 8 0 sysvmsgpl 40 34 0 11 1 0 1 1 0 8 0 semapl 112 488 0 478 1 0 1 1 0 8 0 shmpl 112 43 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6492 0 5086 89 0 89 89 0 8 0 ffsino 272 6492 0 5086 94 0 94 94 0 8 0 nchpl 144 11654 0 10064 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 29068 0 29067 1 0 1 1 0 8 0 percpumem 16 71 0 39 1 0 1 1 0 8 0 vmpool 560 21 0 21 3 3 0 1 0 8 0 pfiaddrpl 120 57 0 42 1 0 1 1 0 8 0 scxspl 200 34374 0 34373 13 12 1 7 0 8 0 plimitpl 152 168 0 160 1 0 1 1 0 8 0 sigapl 424 4337 0 4304 4 0 4 4 0 8 0 futexpl 56 32457 0 32457 1 0 1 1 0 8 1 knotepl 112 271 0 251 1 0 1 1 0 8 0 kqueuepl 152 2017 0 2008 1 0 1 1 0 8 0 pipepl 304 244 0 233 12 10 2 2 0 8 1 fdescpl 496 4320 0 4304 3 0 3 3 0 8 0 filepl 152 15411 0 15309 5 0 5 5 0 8 1 lockfpl 104 479 0 478 1 0 1 1 0 8 0 lockfspl 48 204 0 203 1 0 1 1 0 8 0 sessionpl 120 20 0 9 1 0 1 1 0 8 0 pgrppl 48 38 0 27 1 0 1 1 0 8 0 ucredpl 96 2066 0 2057 1 0 1 1 0 8 0 zombiepl 144 4304 0 4304 1 0 1 1 0 8 1 processpl 1008 4337 0 4304 5 0 5 5 0 8 0 procpl 632 9459 0 9418 4 0 4 4 0 8 0 sosppl 144 52 0 52 2 2 0 1 0 8 0 sockpl 400 3233 0 3210 6 2 4 5 0 8 0 mcl64k 65536 20 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 15 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 24 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 291 0 0 19 0 19 19 0 8 0 mtagpl 96 239 0 0 5 0 5 5 0 8 0 mbufpl 256 953 0 0 56 1 55 55 0 8 0 bufpl 280 9810 0 3535 449 0 449 449 0 8 0 anonpl 16 297385 0 289747 35 3 32 32 0 124 0 amapchunkpl 152 15821 0 15617 11 2 9 9 0 158 0 amappl16 192 12533 0 12271 15 1 14 15 0 8 0 amappl15 184 10 0 8 1 0 1 1 0 8 0 amappl14 176 9 0 3 2 1 1 1 0 8 0 amappl13 168 106 0 104 1 0 1 1 0 8 0 amappl12 160 1291 0 1286 1 0 1 1 0 8 0 amappl11 152 71 0 56 1 0 1 1 0 8 0 amappl10 144 1593 0 1587 1 0 1 1 0 8 0 amappl9 136 1557 0 1557 1 1 0 1 0 8 0 amappl8 128 1480 0 1396 3 0 3 3 0 8 0 amappl7 120 1877 0 1866 1 0 1 1 0 8 0 amappl6 112 144 0 125 1 0 1 1 0 8 0 amappl5 104 5710 0 5699 1 0 1 1 0 8 0 amappl4 96 348 0 315 1 0 1 1 0 8 0 amappl3 88 219 0 213 1 0 1 1 0 8 0 amappl2 80 29643 0 29572 3 1 2 3 0 8 0 amappl1 72 119474 0 119010 24 14 10 19 0 8 0 amappl 80 9787 0 9727 2 0 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 18 0 17 1 0 1 1 0 8 0 aobjpl 64 45 0 10 1 0 1 1 0 8 0 uaddrrnd 24 4341 0 4325 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4341 0 4325 1 0 1 1 0 8 0 vmmpekpl 168 21366 0 21326 3 0 3 3 0 8 0 vmmpepl 168 526363 0 524855 93 20 73 75 0 357 3 vmsppl 368 4340 0 4325 2 0 2 2 0 8 0 pdppl 4096 8689 0 8650 6 0 6 6 0 8 1 pvpl 32 1429354 0 1418527 160 65 95 115 0 265 5 pmappl 232 4340 0 4325 5 4 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 309 0 11 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff826d0ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 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+0x37 kd_curproc sys/dev/kcov.c:513 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x37 sys/dev/kcov.c:121 __mp_lock(ffffffff82888b60) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82888b60) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021cee400,ffff80000004a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x19f end of kernel end trace frame: 0x7f7fffffadb0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at strlen+0x81: movq 0(%rax),%rdx ddb{1}> trace strlen() at strlen+0x81 kern_sysctl(ffff800024112124,7,0,ffff800024112158,0,0) at kern_sysctl+0xc74 sys/kern/kern_sysctl.c:518 sys_sysctl(ffff800020e9e018,ffff8000241121c8,ffff800024112210) at sys_sysctl+0x209 sys/kern/kern_sysctl.c:250 syscall(ffff800024112290) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800024112290) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:568 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bbe949cc60, count: -5