panic: kernel diagnostic assWeArRtNiIoNnG: S"pgP-L> wNiOreT_ cLoOWuERntED !O= N0 " SfYSaCiALlLe d1: 3f6il e1 53"1/0sy5z35k0a4l leErX/ImTana g0 e9r s/Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 28474 15959 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x72ff5b420660, count: 14 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu0: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1207 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x72ff5b420660, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a35cf30 rbx 0 rdx 0 rcx 0xffff8000fffeea78 rax 0x3c r8 0xffff80002a35ce60 r9 0 r10 0xac269bb508cf7e30 r11 0x8c49c71786e764b8 r12 0 r13 0 r14 0xffff8000fffeea78 r15 0 rip 0xffffffff8270b3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a35ceb0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=28474 pid=15959 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffef240,0xffff8000fffef780 process=0xffff8000ffff5ce8 user=0xffff80002a357000, vmspace=0xfffff3006f3733d8 estcpu=36, cpticks=16, pctcpu=0.8, user=1, sys=14, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16028 495620 56742 0 2 0x2 syz-executor 52706 301052 31689 0 2 0 syz-executor 52706 422169 31689 0 3 0x4000080 fsleep syz-executor 27709 371992 95120 0 2 0 syz-executor 14235 416385 55807 0 2 0 syz-executor 14235 425807 55807 0 3 0x4000080 fsleep syz-executor 62122 305445 38613 0 2 0 syz-executor 62122 212442 38613 0 3 0x4000080 fsleep syz-executor 22046 400336 1 0 2 0 syz-executor 22046 427653 1 0 3 0x4000080 fifor syz-executor 22046 256709 1 0 3 0x4000080 fifor syz-executor 22046 518258 1 0 3 0x4000080 fifor syz-executor 22046 41693 1 0 3 0x4000080 fifor syz-executor 22046 9391 1 0 3 0x4000080 fsleep syz-executor 22046 93887 1 0 2 0x4000000 syz-executor 6723 107358 90962 0 2 0 syz-executor 6723 499311 90962 0 3 0x4000080 fsleep syz-executor 67819 199151 56742 0 2 0xc82 syz-executor 32666 27505 0 0 3 0x14200 acct acct *15959 28474 56742 0 7 0x2 syz-executor 95120 344277 56742 0 2 0xc82 syz-executor 55807 287599 56742 0 2 0xc82 syz-executor 90962 350937 56742 0 2 0xc82 syz-executor 38613 366601 56742 0 2 0xc82 syz-executor 31689 361400 56742 0 2 0xc82 syz-executor 56742 475517 48403 0 3 0x82 kqread syz-executor 48403 179912 52303 0 3 0x10008a sigsusp ksh 52303 208956 14862 0 3 0x98 kqread sshd-session 14862 276653 27183 0 3 0x92 kqread sshd-session 69250 522892 1 0 3 0x100083 ttyin getty 27183 17546 1 0 3 0x88 kqread sshd 56569 200619 16234 74 3 0x1100092 bpf pflogd 16234 380099 1 0 3 0x80 sbwait pflogd 57311 114035 7355 73 3 0x1100090 kqread syslogd 7355 283836 1 0 3 0x100082 sbwait syslogd 25883 80547 1 0 3 0x100080 kqread resolvd 77492 407225 267 77 3 0x100092 kqread dhcpleased 54394 480307 267 77 3 0x100092 kqread dhcpleased 267 317167 1 0 3 0x80 kqread dhcpleased 98576 97367 0 0 3 0x14200 bored smr 2336 368657 0 0 2 0x14200 zerothread 52656 428314 0 0 3 0x14200 aiodoned aiodoned 34499 108449 0 0 3 0x14200 syncer update 20667 313358 0 0 3 0x14200 cleaner cleaner 2574 216331 0 0 3 0x14200 reaper reaper 77692 358593 0 0 3 0x14200 pgdaemon pagedaemon 79525 442704 0 0 3 0x14200 bored viomb 5113 500188 0 0 3 0x40014200 acpi0 acpi0 75731 284238 0 0 3 0x40014200 idle1 55582 184339 0 0 3 0x14200 bored softnet1 22886 326765 0 0 3 0x14200 bored softnet0 99923 68835 0 0 3 0x14200 bored systqmp 69025 495134 0 0 3 0x14200 bored systq 21367 332367 0 0 3 0x14200 tmoslp softclockmp 44866 168710 0 0 3 0x40014200 tmoslp softclock 13770 269093 0 0 3 0x40014200 idle0 1 386028 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex namei r = 0 (0xffffffff83a0c2e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 namei+0xdf sys/kern/vfs_lookup.c:145 #4 domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 15959 (syz-executor) thread 0xffff8000fffeea78 (28474) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83ae20c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 exclusive mutex namei r = 0 (0xffffffff83a0c2e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 namei+0xdf sys/kern/vfs_lookup.c:145 #4 domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11070 12241K 12422K 166960K 12368 0 pcb 19 12K 12K 166960K 46 0 rtable 225 7K 9K 166960K 428 0 pf 34 17K 24K 166960K 88 0 ifaddr 39 6K 7K 166960K 55 0 ifgroup 51 2K 2K 166960K 67 0 sysctl 1 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 86 0 ioctlops 0 0K 4K 166960K 1510 0 iov 0 0K 12K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1370 86K 86K 166960K 1577 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 305 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 180K 166960K 598 0 subproc 74 4K 5K 166960K 101 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 22 0 in_multi 88 6K 7K 166960K 113 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 421 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 169K 170K 166960K 4642 0 UVM aobj 9 2K 2K 166960K 9 0 pinsyscall 41 82K 105K 166960K 1527 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3 0 NDP 11 0K 2K 166960K 35 0 temp 44 9111K 9175K 166960K 12399 0 kqueue 14 22K 26K 166960K 49 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 52 0 48 1 0 1 1 0 8 0 rtentry 176 122 0 23 6 0 6 6 0 8 0 unpcb 144 252 0 233 6 5 1 6 0 8 0 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 736 44 0 39 1 0 1 1 0 8 0 arp 136 20 0 4 1 0 1 1 0 8 0 inpcb 328 177 0 167 2 0 2 2 0 8 0 nd6 152 27 0 6 1 0 1 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 7 0 7 1 1 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 8 0 8 1 1 0 1 0 8 0 pfanchor 1288 6 0 2 1 0 1 1 0 8 0 pftag 88 4 0 2 1 0 1 1 0 8 0 pfstitem 24 25 0 0 1 0 1 1 0 8 0 pfstkey 128 27 0 2 1 0 1 1 0 8 0 pfstate 448 26 0 1 3 0 3 3 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 497 0 88 29 3 26 29 0 8 0 art_table 40 498 0 88 5 0 5 5 0 8 0 art_node 32 122 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semapl 72 10 0 2 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1826 0 355 93 0 93 93 0 8 0 ffsino 296 1826 0 355 114 0 114 114 0 8 0 nchpl 144 2223 0 517 64 0 64 64 0 8 0 vnodes 216 2078 0 0 116 0 116 116 0 8 0 namei 1024 7258 0 7258 2 1 1 2 0 8 1 percpumem 16 58 0 9 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 37 0 12 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 7419 0 7419 3 2 1 2 1 8 1 plimitpl 152 50 0 31 1 0 1 1 0 8 0 sigapl 424 627 0 579 7 1 6 7 0 8 0 knotepl 120 378 0 0 12 0 12 12 0 8 0 kqueuepl 224 71 0 60 1 0 1 1 0 8 0 pipepl 344 145 0 117 3 0 3 3 0 8 0 fdescpl 528 610 0 580 3 0 3 3 0 8 0 filepl 160 2792 0 2567 15 5 10 15 0 8 0 lockfpl 104 89 0 86 1 0 1 1 0 8 0 lockfspl 48 42 0 39 1 0 1 1 0 8 0 sessionpl 144 70 0 61 1 0 1 1 0 8 0 pgrppl 48 87 0 69 1 0 1 1 0 8 0 ucredpl 104 253 0 240 1 0 1 1 0 8 0 zombiepl 144 580 0 579 2 1 1 1 0 8 0 processpl 1232 627 0 579 5 1 4 5 0 8 0 procpl 664 884 0 826 6 0 6 6 0 8 0 sosppl 176 3 0 3 1 1 0 1 0 8 0 sockpl 752 486 0 453 17 13 4 17 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 136 0 0 17 0 17 17 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 171 0 0 11 0 11 11 0 8 0 bufpl 272 5156 0 106 337 0 337 337 0 8 0 anonpl 32 10382 0 0 84 0 84 84 0 246 0 amapchunkpl 152 14560 0 13793 45 11 34 34 0 158 2 amappl16 200 1724 0 1695 5 3 2 5 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 454 0 453 1 0 1 1 0 8 0 amappl13 176 142 0 130 1 0 1 1 0 8 0 amappl12 168 871 0 842 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 1 0 1 0 8 0 amappl10 152 101 0 86 1 0 1 1 0 8 0 amappl9 144 279 0 278 1 0 1 1 0 8 0 amappl8 136 107 0 104 1 0 1 1 0 8 0 amappl7 128 151 0 138 1 0 1 1 0 8 0 amappl6 120 168 0 165 1 0 1 1 0 8 0 amappl5 112 98 0 88 1 0 1 1 0 8 0 amappl4 104 303 0 282 1 0 1 1 0 8 0 amappl3 96 2535 0 2419 4 0 4 4 0 8 0 amappl2 88 681 0 618 2 0 2 2 0 8 0 amappl1 80 11264 0 10660 15 1 14 15 0 8 0 amappl 88 3834 0 3665 5 0 5 5 0 92 0 uvmvnodes 80 104 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 72 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 610 0 579 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 610 0 579 1 0 1 1 0 8 0 vmmpekpl 168 6963 0 6918 3 0 3 3 0 8 0 vmmpepl 168 47662 0 45738 90 2 88 88 0 357 0 vmsppl 488 609 0 579 5 0 5 5 0 8 0 rwobjpl 80 16503 0 15428 24 0 24 24 0 8 0 pdppl 4096 1227 0 1158 109 38 71 87 0 8 2 pvpl 32 30721 0 0 248 0 248 248 0 265 0 pmappl 256 609 0 579 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 623 0 47 17 0 17 17 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83985ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x194 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x194 sys/dev/acpi/acpitimer.c:125 comcnputc(800,2f) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(2f) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2f) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83497404) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff834be1e0) at panic+0x103 sys/kern/subr_prf.c:217 __assert(ffffffff834f943f,ffffffff834e8806,4b7,ffffffff8344a743) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffff300085c6bc8) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206 uvm_fault_unwire_locked(fffff3006c4b0b90,6174ec87000,6174f086000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 end trace frame: 0xffff800032785330, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83985ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x194 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x194 sys/dev/acpi/acpitimer.c:125 comcnputc(800,2f) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(2f) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2f) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83497404) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff834be1e0) at panic+0x103 sys/kern/subr_prf.c:217 __assert(ffffffff834f943f,ffffffff834e8806,4b7,ffffffff8344a743) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffff300085c6bc8) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206 uvm_fault_unwire_locked(fffff3006c4b0b90,6174ec87000,6174f086000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffff3006c4b0b90,fffff3006c48e3b0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffff3006c4b0b90) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffff3006c4b0b90) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003c3b8d18,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c3b8d18,ffff800032785510,ffff800032785460) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800032785510) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032785510) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70971a027d70, count: -20 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x72ff5b420660, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x72ff5b420660, count: -1