uvm_fault(0xffffffff8285b1b8, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff8285b1b8, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800023104e38,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023104c70, count: 0 ddb{0}> trace tun_dev_read(5d00,ffff800023104e38,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023104c80) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e678418,ffff800023104e38,10,fffffd807f7bf7e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067c07c90,ffff800023104e38,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800022cf2778,f0,ffff800023104e38,0,ffff800023104f20) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800022cf2778,ffff800023104ed0,ffff800023104f20) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023104fa0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023104fa0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb3e6365e00, count: -8 ddb{0}> show registers rdi 0 rsi 0x3aa rbp 0xffff800023104bc0 rbx 0xfffffd0000000000 rdx 0x153 rcx 0xffff800000aebdc0 rax 0xffffffff81472b23 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x306dba4b64a475d7 r11 0xd4f62dcd76c2be77 r12 0 r13 0x3aa r14 0xffff800000ac6660 r15 0xffff800023104e38 rip 0xffffffff81472b28 tun_dev_read+0x138 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800023104b60 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.0) pid=501645 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800022cf2c58,0xffffffff8292ae38 process=0xffff800020ec7b18 user=0xffff800023100000, vmspace=0xfffffd8064523e78 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45128 187386 92622 0 2 0 syz-executor.0 *45128 501645 92622 0 7 0x4000000 syz-executor.0 56148 476892 0 0 3 0x14200 acct acct 53540 152483 0 0 3 0x14200 bored sosplice 84417 28044 0 0 3 0x14280 nfsidl nfsio 59251 217772 0 0 3 0x14280 nfsidl nfsio 91948 47286 0 0 3 0x14280 nfsidl nfsio 49644 307601 0 0 3 0x14280 nfsidl nfsio 18768 460633 0 0 3 0x14280 nfsidl nfsio 86785 416104 0 0 3 0x14280 nfsidl nfsio 80321 330085 0 0 3 0x14280 nfsidl nfsio 28782 91462 0 0 3 0x14280 nfsidl nfsio 13961 274115 0 0 3 0x14280 nfsidl nfsio 80094 300642 0 0 3 0x14280 nfsidl nfsio 24798 337077 0 0 3 0x14280 nfsidl nfsio 51986 141905 0 0 3 0x14280 nfsidl nfsio 54265 183764 0 0 3 0x14280 nfsidl nfsio 16081 308071 0 0 3 0x14280 nfsidl nfsio 6875 499994 0 0 3 0x14280 nfsidl nfsio 32677 359234 0 0 3 0x14280 nfsidl nfsio 66048 369822 0 0 3 0x14280 nfsidl nfsio 50383 6643 0 0 3 0x14280 nfsidl nfsio 71791 173796 0 0 3 0x14280 nfsidl nfsio 41267 456582 0 0 3 0x14280 nfsidl nfsio 35872 254709 86963 0 3 0x82 piperd syz-executor.1 92622 505373 86963 0 3 0x82 nanosleep syz-executor.0 86963 442823 4063 0 2 0x2 syz-fuzzer 86963 237805 4063 0 7 0x4000482 syz-fuzzer 86963 520145 4063 0 3 0x4000082 thrsleep syz-fuzzer 86963 290665 4063 0 3 0x4000082 thrsleep syz-fuzzer 86963 136663 4063 0 3 0x4000082 thrsleep syz-fuzzer 86963 13635 4063 0 3 0x4000082 thrsleep syz-fuzzer 86963 24082 4063 0 3 0x4000082 kqread syz-fuzzer 86963 364346 4063 0 3 0x4000082 thrsleep syz-fuzzer 86963 317415 4063 0 3 0x4000082 thrsleep syz-fuzzer 86963 136771 4063 0 3 0x4000082 thrsleep syz-fuzzer 4063 249584 12816 0 3 0x10008a pause ksh 12816 338519 8680 0 3 0x92 select sshd 58165 276535 1 0 3 0x100083 ttyopn getty 8680 290168 1 0 3 0x80 select sshd 79261 439177 21153 74 3 0x100092 bpf pflogd 21153 511735 1 0 3 0x80 netio pflogd 93807 20575 28162 73 3 0x100090 kqread syslogd 28162 331576 1 0 3 0x100082 netio syslogd 98285 82587 1 77 3 0x100090 poll dhclient 79617 77977 1 0 3 0x80 poll dhclient 31359 339563 0 0 3 0x14200 bored smr 71058 191134 0 0 2 0x14200 zerothread 44688 436056 0 0 3 0x14200 aiodoned aiodoned 20907 506615 0 0 3 0x14200 syncer update 32059 113564 0 0 3 0x14200 cleaner cleaner 92229 460603 0 0 3 0x14200 reaper reaper 34922 126717 0 0 3 0x14200 pgdaemon pagedaemon 49979 11642 0 0 3 0x14200 bored crynlk 85113 477061 0 0 3 0x14200 bored crypto 84906 267129 0 0 3 0x40014200 acpi0 acpi0 30842 422588 0 0 3 0x40014200 idle1 43872 198986 0 0 3 0x14200 bored softnet 26830 100329 0 0 3 0x14200 bored systqmp 40115 314464 0 0 3 0x14200 bored systq 84050 98479 0 0 2 0x40014200 softclock 10568 95148 0 0 3 0x40014200 idle0 1 453746 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 45128 (syz-executor.0) thread 0xffff800022cf2778 (501645) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82928050) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 vn_read+0x45 sys/kern/vfs_vnops.c:357 #2 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #3 sys_read+0x83 sys/kern/sys_generic.c:157 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9532 6422K 6809K 78643K 11548 0 pcb 13 8K 8K 78643K 108 0 rtable 116 5K 7K 78643K 483 0 ifaddr 95 18K 18K 78643K 207 0 counters 43 33K 34K 78643K 69 0 ioctlops 0 0K 4K 78643K 1568 0 iov 0 0K 16K 78643K 121 0 mount 1 1K 1K 78643K 1 0 vnodes 1215 76K 77K 78643K 1539 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 28 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 695 0 sigio 0 0K 0K 78643K 3 0 proc 62 63K 95K 78643K 512 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 33 0 in_multi 82 3K 4K 78643K 200 0 ether_multi 1 0K 0K 78643K 15 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 256 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 144 177K 182K 78643K 3118 0 UVM aobj 36 2K 2K 78643K 42 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 68 0 NDP 14 0K 0K 78643K 45 0 temp 140 3875K 3939K 78643K 9843 0 kqueue 3 4K 16K 78643K 46 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 arp 64 10 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 53 0 51 1 0 1 1 0 8 0 rtentry 112 92 0 47 2 0 2 2 0 8 0 unpcb 120 283 0 273 1 0 1 1 0 8 0 syncache 264 11 0 11 4 4 0 1 0 8 0 tcpqe 32 42 0 42 3 3 0 1 0 8 0 tcpcb 544 324 0 318 1 0 1 1 0 8 0 inpcb 296 792 0 783 3 1 2 2 0 8 1 rttmr 72 3 0 2 2 1 1 1 0 8 0 nd6 48 29 0 23 1 0 1 1 0 8 0 ppxss 1128 4 0 4 2 2 0 1 0 8 0 pffrag 232 3 0 3 2 2 0 1 0 482 0 pffrnode 88 3 0 3 2 2 0 1 0 8 0 pffrent 40 8 0 8 2 2 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 pfrktable 1344 29 0 28 2 1 1 1 0 8 0 pfstitem 24 52 0 25 1 0 1 1 0 8 0 pfstkey 112 52 0 25 2 0 2 2 0 8 0 pfstate 328 52 0 25 5 0 5 5 0 8 1 pfrule 1360 36 0 20 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 344 0 111 15 0 15 15 0 8 0 art_table 32 345 0 111 2 0 2 2 0 8 0 art_node 16 89 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 43 0 26 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 40 0 7 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2357 0 953 89 0 89 89 0 8 0 ffsino 272 2357 0 953 95 0 95 95 0 8 0 nchpl 144 3893 0 2295 60 0 60 60 0 8 0 uvmvnodes 72 2606 0 0 48 0 48 48 0 8 0 vnodes 208 2606 0 0 138 0 138 138 0 8 0 namei 1024 12594 0 12594 2 1 1 1 0 8 1 percpumem 16 45 0 13 1 0 1 1 0 8 0 vcpupl 1984 18 0 0 3 0 3 3 0 8 0 vmpool 560 21 0 3 2 0 2 2 0 8 0 pfiaddrpl 120 8 0 8 2 2 0 1 0 8 0 scxspl 192 10832 0 10832 9 8 1 7 0 8 1 plimitpl 152 75 0 67 1 0 1 1 0 8 0 sigapl 424 933 0 880 7 1 6 7 0 8 0 futexpl 56 11894 0 11894 2 1 1 1 0 8 1 knotepl 112 104 0 85 1 0 1 1 0 8 0 kqueuepl 144 107 0 105 1 0 1 1 0 8 0 pipelkpl 48 180 0 170 1 0 1 1 0 8 0 pipepl 120 360 0 341 1 0 1 1 0 8 0 fdescpl 496 895 0 879 3 0 3 3 0 8 0 filepl 152 5679 0 5579 6 1 5 5 0 8 1 lockfpl 104 144 0 143 1 0 1 1 0 8 0 lockfspl 48 50 0 49 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 12 1 0 1 1 0 8 0 ucredpl 96 514 0 504 1 0 1 1 0 8 0 zombiepl 144 880 0 880 2 1 1 1 0 8 1 processpl 984 933 0 880 7 0 7 7 0 8 0 procpl 624 2319 0 2256 6 0 6 6 0 8 0 sosppl 128 11 0 11 4 4 0 1 0 8 0 sockpl 400 1131 0 1107 5 1 4 4 0 8 1 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 14 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 187 0 0 23 0 23 23 0 8 0 mtagpl 96 66 0 0 2 0 2 2 0 8 0 mbufpl 256 467 0 0 29 0 29 29 0 8 0 bufpl 280 5021 0 146 349 0 349 349 0 8 0 anonpl 16 87246 0 71110 86 19 67 81 0 124 2 amapchunkpl 152 5449 0 5308 27 16 11 20 0 158 4 amappl16 192 4052 0 3166 58 12 46 55 0 8 1 amappl15 184 187 0 185 1 0 1 1 0 8 0 amappl14 176 22 0 19 1 0 1 1 0 8 0 amappl13 168 982 0 975 1 0 1 1 0 8 0 amappl12 160 12 0 11 1 0 1 1 0 8 0 amappl11 152 243 0 226 1 0 1 1 0 8 0 amappl10 144 19 0 14 1 0 1 1 0 8 0 amappl9 136 386 0 385 1 0 1 1 0 8 0 amappl8 128 356 0 327 1 0 1 1 0 8 0 amappl7 120 116 0 105 1 0 1 1 0 8 0 amappl6 112 216 0 209 1 0 1 1 0 8 0 amappl5 104 148 0 133 1 0 1 1 0 8 0 amappl4 96 1157 0 1126 1 0 1 1 0 8 0 amappl3 88 633 0 625 1 0 1 1 0 8 0 amappl2 80 6234 0 6160 2 0 2 2 0 8 0 amappl1 72 28766 0 28322 23 13 10 18 0 8 0 amappl 80 2565 0 2513 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 41 0 6 1 0 1 1 0 8 0 uaddrrnd 24 916 0 882 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 916 0 882 1 0 1 1 0 8 0 vmmpekpl 168 10286 0 10242 3 0 3 3 0 8 0 vmmpepl 168 115370 0 113290 117 24 93 107 0 357 0 vmsppl 368 915 0 882 4 0 4 4 0 8 0 pdppl 4096 1839 0 1782 9 1 8 8 0 8 0 pvpl 32 278200 0 259090 209 46 163 195 0 265 8 pmappl 232 915 0 882 3 0 3 3 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 292 0 6 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d00,ffff800023104e38,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023104c80) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e678418,ffff800023104e38,10,fffffd807f7bf7e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067c07c90,ffff800023104e38,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800022cf2778,f0,ffff800023104e38,0,ffff800023104f20) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800022cf2778,ffff800023104ed0,ffff800023104f20) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023104fa0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023104fa0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb3e6365e00, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(bcdc2,bcdc3) at __sanitizer_cov_trace_cmp4+0x44 kd_curproc sys/dev/kcov.c:411 [inline] __sanitizer_cov_trace_cmp4(bcdc2,bcdc3) at __sanitizer_cov_trace_cmp4+0x44 trace_cmp sys/dev/kcov.c:104 [inline] __sanitizer_cov_trace_cmp4(bcdc2,bcdc3) at __sanitizer_cov_trace_cmp4+0x44 sys/dev/kcov.c:135 __mp_lock(ffffffff82927e48) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82927e48) at __mp_lock+0x139 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82927e48,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800020e7f650,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020e7f650,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020e7f650,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff828af618,120,ffffffff823f2a0d,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e4eeb0,ffff800020e7f780,ffff800020e7f7d0) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020e7f850) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e7f850) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000051f38, count: -13