uvm_fault(0xfffffd807effea10, 0xa, 0, 1) -> e kernel: page fault trap, code=0 Stopped at vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xfffffd807effea10, 0xa, 0, 1) -> e vio_rxeof(ffff80000017c000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff800023100a90, count: 0 ddb{0}> trace vio_rxeof(ffff80000017c000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 vio_rx_intr(ffff80000017c050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1056 intr_handler(ffff800023100af0,ffff800000256b80) at intr_handler+0x8f sys/arch/amd64/amd64/intr.c:536 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f Xspllower() at Xspllower+0x19 malloc(10000,7f,1) at malloc+0x91d sys/kern/kern_malloc.c:360 ufs_readdir(ffff800023100ed0) at ufs_readdir+0x148 sys/ufs/ufs/ufs_vnops.c:1456 VOP_READDIR(fffffd806474d350,ffff800023100f50,fffffd807f7bfae0,ffff800023100f94) at VOP_READDIR+0xc6 sys/kern/vfs_vops.c:520 sys_getdents(ffff800020e04608,ffff800023101010,ffff800023101060) at sys_getdents+0x21d sys/kern/vfs_syscalls.c:3121 syscall(ffff8000231010e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000231010e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcd8f0, count: -11 ddb{0}> show registers rdi 0xc rsi 0xc rbp 0xffff800023100a30 rbx 0xffff80000017c000 rdx 0 rcx 0xffffffff82791ff0 cpu_info_full_primary+0x1ff0 rax 0xffffffff82791ff0 cpu_info_full_primary+0x1ff0 r8 0x2 r9 0 r10 0xc8d050773789662 r11 0xd00d404ebd4b9f9b r12 0xffff800000024c00 r13 0xc r14 0xfffffd806a3f2600 r15 0 rip 0xffffffff8135d211 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000231009a0 ss 0x10 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb{0}> show proc PROC (syz-executor.1) pid=267441 stat=onproc flags process=2 proc=0 pri=76, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff800020ddc758,0xffff800020e03778 process=0xffff800020df1b30 user=0xffff8000230fc000, vmspace=0xfffffd807effea10 estcpu=36, cpticks=1, pctcpu=0.14 user=0, sys=0, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89733 511444 36562 0 7 0 syz-executor.0 89733 388443 36562 0 3 0x4000080 ttyin syz-executor.0 24925 426705 1 0 3 0x100083 ttyin getty 41335 196718 0 0 3 0x14200 bored sosplice *87271 267441 8360 0 7 0x2 syz-executor.1 36562 325624 8360 0 3 0x82 nanosleep syz-executor.0 8360 99210 34566 0 3 0x82 thrsleep syz-fuzzer 8360 217540 34566 0 3 0x4000082 nanosleep syz-fuzzer 8360 513042 34566 0 3 0x4000082 thrsleep syz-fuzzer 8360 387771 34566 0 3 0x4000082 thrsleep syz-fuzzer 8360 175782 34566 0 3 0x4000082 thrsleep syz-fuzzer 8360 463812 34566 0 3 0x4000082 nanosleep syz-fuzzer 8360 106655 34566 0 3 0x4000082 thrsleep syz-fuzzer 8360 96807 34566 0 3 0x4000082 kqread syz-fuzzer 8360 193895 34566 0 3 0x4000082 thrsleep syz-fuzzer 8360 414980 34566 0 3 0x4000082 thrsleep syz-fuzzer 34566 33176 74578 0 3 0x10008a pause ksh 74578 237099 86403 0 3 0x92 select sshd 86403 157525 1 0 3 0x80 select sshd 85317 4223 32656 74 3 0x100092 bpf pflogd 32656 40505 1 0 3 0x80 netio pflogd 84324 371309 86730 73 3 0x100090 kqread syslogd 86730 254010 1 0 3 0x100082 netio syslogd 55846 450600 1 77 3 0x100090 poll dhclient 82520 453946 1 0 3 0x80 poll dhclient 40559 302345 0 0 3 0x14200 bored smr 18944 265437 0 0 3 0x14200 pgzero zerothread 74338 308092 0 0 3 0x14200 aiodoned aiodoned 49304 404617 0 0 3 0x14200 syncer update 1596 429619 0 0 3 0x14200 cleaner cleaner 96902 359077 0 0 3 0x14200 reaper reaper 33909 316761 0 0 3 0x14200 pgdaemon pagedaemon 51129 273576 0 0 3 0x14200 bored crynlk 28199 449524 0 0 3 0x14200 bored crypto 29689 359410 0 0 3 0x40014200 acpi0 acpi0 84973 85482 0 0 3 0x40014200 idle1 79426 268186 0 0 3 0x14200 bored softnet 56650 186264 0 0 3 0x14200 bored systqmp 34080 61555 0 0 3 0x14200 bored systq 17082 297477 0 0 3 0x40014200 bored softclock 33090 969 0 0 3 0x40014200 idle0 1 163910 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 87271 (syz-executor.1) thread 0xffff800020e04608 (267441) exclusive rrwlock inode r = 0 (0xfffffd8068495920) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 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 sys_getdents+0x1aa sys/kern/vfs_syscalls.c:3106 #6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #7 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 2 (0xffffffff828fd198) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9512 6424K 7051K 78643K 11546 0 pcb 13 8K 8K 78643K 91 0 rtable 87 3K 8K 78643K 502 0 ifaddr 77 16K 16K 78643K 214 0 counters 43 33K 34K 78643K 75 0 ioctlops 0 0K 4K 78643K 1545 0 iov 0 0K 18K 78643K 1123 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1513 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 20 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 275 0 dirhash 6 1K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 856 0 sigio 0 0K 0K 78643K 7 0 proc 61 63K 95K 78643K 491 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 53 0 in_multi 61 2K 3K 78643K 147 0 ether_multi 1 0K 0K 78643K 11 0 mrt 0 0K 0K 78643K 10 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 266 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 121 39K 39K 78643K 3703 0 UVM aobj 36 7K 7K 78643K 49 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 48 0 NDP 11 0K 0K 78643K 39 0 temp 128 3926K 3926K 78643K 12952 0 kqueue 3 4K 22K 78643K 27 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 9 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 51 0 49 1 0 1 1 0 8 0 rtentry 112 79 0 47 2 0 2 2 0 8 0 unpcb 120 414 0 403 1 0 1 1 0 8 0 syncache 264 8 0 8 4 4 0 1 0 8 0 tcpqe 32 847 0 847 2 2 0 1 0 8 0 tcpcb 544 179 0 175 1 0 1 1 0 8 0 inpcb 296 661 0 653 6 4 2 2 0 8 1 rttmr 72 3 0 3 2 2 0 1 0 8 0 nd6 48 19 0 15 1 0 1 1 0 8 0 pkpcb 40 10 0 10 3 3 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1136 1 0 1 1 1 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 5 0 5 2 2 0 1 0 482 0 pffrnode 88 5 0 5 2 2 0 1 0 8 0 pffrent 40 100 0 100 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 38 0 38 2 2 0 1 0 8 0 pfstitem 24 23 0 21 1 0 1 1 0 8 0 pfstkey 112 27 0 25 1 0 1 1 0 8 0 pfstate 328 25 0 23 2 1 1 2 0 8 0 pfrule 1360 32 0 25 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 269 0 160 13 2 11 13 0 8 0 art_table 32 270 0 160 2 0 2 2 0 8 0 art_node 16 70 0 44 1 0 1 1 0 8 0 sysvmsgpl 40 33 0 16 1 0 1 1 0 8 0 semapl 112 273 0 263 1 0 1 1 0 8 0 shmpl 112 46 0 13 1 0 1 1 0 8 0 dirhash 1024 17 0 13 3 1 2 3 0 8 0 dino2pl 256 2449 0 1044 89 1 88 89 0 8 0 ffsino 272 2449 0 1044 95 1 94 94 0 8 0 nchpl 144 4353 0 2736 60 0 60 60 0 8 0 uvmvnodes 72 2705 0 0 50 0 50 50 0 8 0 vnodes 208 2705 0 0 143 0 143 143 0 8 0 namei 1024 11840 0 11840 2 1 1 1 0 8 1 percpumem 16 48 0 16 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 8 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 9 0 9 2 2 0 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 11240 0 11240 9 8 1 7 0 8 1 plimitpl 152 131 0 122 1 0 1 1 0 8 0 sigapl 424 1073 0 1041 4 0 4 4 0 8 0 futexpl 56 12265 0 12265 2 1 1 1 0 8 1 knotepl 112 131 0 112 2 1 1 2 0 8 0 kqueuepl 144 104 0 102 1 0 1 1 0 8 0 pipepl 304 182 0 172 5 4 1 2 0 8 0 fdescpl 496 1057 0 1041 3 0 3 3 0 8 0 filepl 152 6371 0 6267 7 2 5 5 0 8 0 lockfpl 104 128 0 127 1 0 1 1 0 8 0 lockfspl 48 45 0 44 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 929 0 920 1 0 1 1 0 8 0 zombiepl 144 1041 0 1041 3 2 1 1 0 8 1 processpl 992 1073 0 1041 7 2 5 5 0 8 0 procpl 624 2895 0 2853 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 12 0 12 3 2 1 1 0 8 1 sockpl 400 1138 0 1118 8 4 4 4 0 8 1 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 191 0 0 23 0 23 23 0 8 0 mtagpl 96 39 0 0 1 0 1 1 0 8 0 mbufpl 256 573 0 0 33 0 33 33 0 8 0 bufpl 280 4838 0 140 336 0 336 336 0 8 0 anonpl 16 118691 0 101764 103 31 72 87 0 124 0 amapchunkpl 152 6038 0 5891 21 13 8 20 0 158 0 amappl16 192 5402 0 4463 76 28 48 60 0 8 0 amappl15 184 370 0 367 1 0 1 1 0 8 0 amappl14 176 24 0 19 1 0 1 1 0 8 0 amappl13 168 29 0 26 1 0 1 1 0 8 0 amappl12 160 5 0 5 1 1 0 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 390 0 382 1 0 1 1 0 8 0 amappl9 136 387 0 384 1 0 1 1 0 8 0 amappl8 128 361 0 331 2 0 2 2 0 8 0 amappl7 120 125 0 113 1 0 1 1 0 8 0 amappl6 112 23 0 20 1 0 1 1 0 8 0 amappl5 104 974 0 955 1 0 1 1 0 8 0 amappl4 96 499 0 466 1 0 1 1 0 8 0 amappl3 88 146 0 140 1 0 1 1 0 8 0 amappl2 80 7892 0 7821 2 0 2 2 0 8 0 amappl1 72 40705 0 40254 23 13 10 18 0 8 0 amappl 80 3163 0 3117 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 48 0 13 1 0 1 1 0 8 0 uaddrrnd 24 1065 0 1045 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1065 0 1045 1 0 1 1 0 8 0 vmmpekpl 168 12748 0 12710 2 0 2 2 0 8 0 vmmpepl 168 142090 0 139940 153 52 101 120 0 357 2 vmsppl 368 1064 0 1045 2 0 2 2 0 8 0 pdppl 4096 2137 0 2094 7 1 6 6 0 8 0 pvpl 32 350976 0 331339 241 77 164 201 0 265 1 pmappl 232 1064 0 1045 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 291 0 14 9 1 8 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace vio_rxeof(ffff80000017c000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 vio_rx_intr(ffff80000017c050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1056 intr_handler(ffff800023100af0,ffff800000256b80) at intr_handler+0x8f sys/arch/amd64/amd64/intr.c:536 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f Xspllower() at Xspllower+0x19 malloc(10000,7f,1) at malloc+0x91d sys/kern/kern_malloc.c:360 ufs_readdir(ffff800023100ed0) at ufs_readdir+0x148 sys/ufs/ufs/ufs_vnops.c:1456 VOP_READDIR(fffffd806474d350,ffff800023100f50,fffffd807f7bfae0,ffff800023100f94) at VOP_READDIR+0xc6 sys/kern/vfs_vops.c:520 sys_getdents(ffff800020e04608,ffff800023101010,ffff800023101060) at sys_getdents+0x21d sys/kern/vfs_syscalls.c:3121 syscall(ffff8000231010e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000231010e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcd8f0, count: -11 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_pc() at __sanitizer_cov_trace_pc+0x4f kd_curproc sys/dev/kcov.c:416 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:79 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd53e0, count: -5