panic: pooWlAR_NpI_fNrGe:e :S PL rNOtTt mLr OWEfrReEDe liOsN tS YmoSdiCfAiLedL: 8pa3 g-2e096 20xf5f803ff2f dEX8IT0 05 eaff 600Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 312160 61853 0 0 0x4000000 1 syz-executor *293351 46508 0 0 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7638ce0ced40, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu1: pool_p_free: rttmr free list modified: page 0xfffffd805eff6000; item addr 0xfffffd805eff6ee8; offset 0x10=0x838b61d0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7638ce0ced40, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a3ad810 rbx 0 rdx 0 rcx 0xffff80003c4554e8 rax 0x3c r8 0xffff80002a3ad740 r9 0 r10 0xa92d8e19789e53c7 r11 0x58601a94a52865b r12 0 r13 0 r14 0xffff80003c4554e8 r15 0 rip 0xffffffff819763ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3ad790 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=293351 pid=46508 tcnt=3 stat=onproc flags process=0 proc=0 runpri=84, usrpri=84, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800037810d38,0xffff80003c454fc8 process=0xffff80003c026720 user=0xffff80002a3a8000, vmspace=0xfffffd800ef9f9a8 estcpu=34, cpticks=3, pctcpu=0.2, user=1, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71070 156201 58746 0 2 0 syz-executor 71070 21030 58746 0 3 0x4000080 fsleep syz-executor 38165 112944 89147 0 2 0 syz-executor 38165 204741 89147 0 3 0x4000080 fsleep syz-executor 61853 214342 74611 0 2 0 syz-executor 61853 127633 74611 0 3 0x4000080 fsleep syz-executor 61853 312160 74611 0 7 0x4000000 syz-executor *46508 293351 58118 0 7 0 syz-executor 46508 310399 58118 0 3 0x4000080 kqsel syz-executor 46508 450021 58118 0 3 0x4000080 fsleep syz-executor 95640 257815 12222 0 2 0 syz-executor 95640 334314 12222 0 3 0x4000080 fsleep syz-executor 95640 68110 12222 0 3 0x4000080 fsleep syz-executor 58746 210919 69834 0 3 0x82 nanoslp syz-executor 26760 326336 0 0 3 0x14280 nfsidl nfsio 62194 10732 0 0 3 0x14280 nfsidl nfsio 55498 283789 69834 0 3 0x82 nanoslp syz-executor 74611 139935 69834 0 3 0x82 nanoslp syz-executor 71224 343414 1 0 3 0x100083 ttyopn getty 58118 312590 69834 0 3 0x82 nanoslp syz-executor 3445 217027 0 0 3 0x14200 bored sosplice 10530 61396 69834 0 3 0x82 nanoslp syz-executor 89147 94183 69834 0 3 0x82 nanoslp syz-executor 43245 66385 69834 0 2 0x2 syz-executor 12222 362445 69834 0 3 0x82 nanoslp syz-executor 69834 484330 27338 0 3 0x82 kqread syz-executor 27338 241984 98831 0 3 0x10008a sigsusp ksh 98831 417700 40819 0 3 0x98 kqread sshd-session 40819 303065 130 0 3 0x92 kqread sshd-session 130 18172 1 0 3 0x88 kqread sshd 56933 462680 29681 74 3 0x1100092 bpf pflogd 29681 11702 1 0 3 0x80 sbwait pflogd 38367 149599 60551 73 3 0x1100090 kqread syslogd 60551 263404 1 0 3 0x100082 sbwait syslogd 94024 266688 1 0 3 0x100080 kqread resolvd 36045 415687 67183 77 3 0x100092 kqread dhcpleased 91166 319692 67183 77 3 0x100092 kqread dhcpleased 67183 246680 1 0 3 0x80 kqread dhcpleased 77687 48205 0 0 3 0x14200 bored smr 814 278291 0 0 2 0x14200 zerothread 99506 473557 0 0 3 0x14200 aiodoned aiodoned 94899 486591 0 0 3 0x14200 syncer update 1821 378886 0 0 3 0x14200 cleaner cleaner 53651 197763 0 0 2 0x14200 reaper 3058 131629 0 0 3 0x14200 pgdaemon pagedaemon 86548 55153 0 0 3 0x14200 bored viomb 5565 132016 0 0 3 0x40014200 acpi0 acpi0 24208 502008 0 0 3 0x40014200 idle1 98098 369663 0 0 3 0x14200 bored softnet7 16588 258881 0 0 3 0x14200 bored softnet6 61329 511558 0 0 3 0x14200 bored softnet5 61668 17585 0 0 3 0x14200 bored softnet4 13769 512312 0 0 3 0x14200 bored softnet3 94197 370886 0 0 3 0x14200 bored softnet2 98631 366941 0 0 3 0x14200 bored softnet1 571 209835 0 0 3 0x14200 bored softnet0 45563 150304 0 0 3 0x14200 bored systqmp 46060 425545 0 0 3 0x14200 bored systq 8499 115290 0 0 3 0x14200 tmoslp softclockmp 81510 249252 0 0 3 0x40014200 tmoslp softclock 59931 301232 0 0 3 0x40014200 idle0 1 326378 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b7b7310) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #4 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #6 exit1+0x6fc sys/kern/kern_exit.c:260 #7 proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235 #8 userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline] #8 userret+0x8c sys/kern/kern_sig.c:2194 #9 intr_user_exit+0x3c Process 61853 (syz-executor) thread 0xffff800037810aa0 (312160) Process 43245 (syz-executor) thread 0xffff8000ffff2fa0 (66385) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10246 11054K 12654K 166960K 15204 0 pcb 17 16K 18K 166960K 996 0 rtable 212 12K 13K 166960K 705 0 pf 42 19K 67486K 166960K 378 0 ifaddr 43 9K 10K 166960K 240 0 ifgroup 63 2K 3K 166960K 459 0 sysctl 4 1K 9K 166960K 63 0 counters 70 37K 38K 166960K 432 0 ioctlops 0 0K 4K 166960K 1974 0 iov 0 0K 18K 166960K 223 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1491 94K 95K 166960K 4084 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 38 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 183 0 dirhash 12 2K 2K 166960K 75 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 2966 0 sigio 0 0K 0K 166960K 88 0 proc 72 115K 164K 166960K 1112 0 subproc 72 4K 4K 166960K 136 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 502 0 in_multi 84 6K 7K 166960K 338 0 ether_multi 1 0K 0K 166960K 41 0 mrt 2 0K 0K 166960K 18 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 1079 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 232 161K 180K 166960K 27959 0 UVM aobj 57 2K 2K 166960K 61 0 pinsyscall 41 82K 106K 166960K 4251 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 145 0 NDP 13 0K 2K 166960K 165 0 temp 83 8652K 29644K 166960K 123677 0 kqueue 13 20K 31K 166960K 591 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 120 248 0 245 1 0 1 1 0 8 0 rtentry 176 237 0 160 5 0 5 5 0 8 0 unpcb 144 2395 0 2374 23 22 1 6 0 8 0 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 1271 0 1260 26 24 2 8 0 8 0 arp 128 22 0 13 1 0 1 1 0 8 0 inpcb 328 3860 0 3846 33 31 2 8 0 8 0 nd6 144 37 0 21 1 0 1 1 0 8 0 pkpcb 40 85 0 85 6 6 0 1 0 8 0 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1192 126 0 126 3 3 0 1 0 8 0 pppxif 1504 26 0 26 6 6 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 58 0 50 1 0 1 1 0 482 0 pffrnode 88 57 0 49 1 0 1 1 0 8 0 pffrent 40 105 0 97 1 0 1 1 0 8 0 pfosfp 40 1430 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1430 0 714 21 0 21 21 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 193 0 93 1 0 1 1 0 8 0 pfstkey 128 198 0 99 4 0 4 4 0 8 0 pfstate 384 195 0 96 11 0 11 11 0 8 0 pfrule 1344 35 0 29 2 1 1 2 0 8 0 rttmr 136 6 0 6 2 2 0 1 0 8 0 art_heap8 4096 6 0 1 6 1 5 5 0 8 0 art_heap4 256 1206 0 836 35 10 25 30 0 8 1 art_table 40 1212 0 837 5 0 5 5 0 8 0 art_node 32 233 0 167 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 13 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 177 0 167 1 0 1 1 0 8 0 shmpl 112 58 0 4 2 0 2 2 0 8 0 dirhash 1024 60 0 43 3 0 3 3 0 8 0 dino2pl 256 7006 0 5481 96 0 96 96 0 8 0 ffsino 296 7006 0 5481 119 1 118 118 0 8 0 nchpl 144 11053 0 9340 65 0 65 65 0 8 0 rtmask 32 25 0 25 7 6 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 41275 0 41275 6 5 1 2 0 8 1 percpumem 16 231 0 181 1 0 1 1 0 8 0 kstatmem 264 274 0 244 4 1 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 18 0 18 5 4 1 1 0 8 1 scxspl 216 79284 0 79284 15 13 2 8 1 8 2 plimitpl 152 917 0 900 1 0 1 1 0 8 0 sigapl 424 3274 0 3218 9 1 8 9 0 8 0 knotepl 120 790 0 0 24 0 24 24 0 8 0 kqueuepl 224 1333 0 1323 18 17 1 5 0 8 0 pipepl 344 685 0 658 19 10 9 9 0 8 6 fdescpl 528 3215 0 3185 3 0 3 3 0 8 0 filepl 160 24401 0 24178 31 13 18 19 0 8 6 lockfpl 104 1504 0 1502 4 2 2 2 0 8 1 lockfspl 48 502 0 500 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 175 0 158 1 0 1 1 0 8 0 ucredpl 104 3939 0 3926 1 0 1 1 0 8 0 zombiepl 144 3466 0 3464 2 1 1 1 0 8 0 processpl 1248 3274 0 3218 6 1 5 6 0 8 0 procpl 664 8073 0 8009 9 2 7 9 0 8 0 sosppl 168 31 0 31 6 5 1 1 0 8 1 sockpl 752 6739 0 6701 73 61 12 24 0 8 7 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 99 0 0 9 0 9 9 0 8 0 mtagpl 96 98 0 0 3 0 3 3 0 8 0 mbufpl 256 301 0 0 16 0 16 16 0 8 0 bufpl 280 31864 0 25721 440 1 439 440 0 8 0 anonpl 32 14929 0 0 120 0 120 120 0 246 0 amapchunkpl 152 97354 0 96896 52 22 30 33 0 158 6 amappl16 200 11203 0 11164 94 78 16 35 0 8 5 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 181 0 168 1 0 1 1 0 8 0 amappl13 176 19 0 19 1 1 0 1 0 8 0 amappl12 168 3993 0 3962 3 1 2 2 0 8 0 amappl11 160 79 0 65 1 0 1 1 0 8 0 amappl10 152 18 0 18 3 3 0 1 0 8 0 amappl9 144 255 0 254 2 1 1 1 0 8 0 amappl8 136 19 0 16 1 0 1 1 0 8 0 amappl7 128 136 0 122 1 0 1 1 0 8 0 amappl6 120 256 0 252 1 0 1 1 0 8 0 amappl5 112 152 0 142 1 0 1 1 0 8 0 amappl4 104 318 0 297 1 0 1 1 0 8 0 amappl3 96 20294 0 20188 5 1 4 4 0 8 0 amappl2 88 859 0 795 2 0 2 2 0 8 0 amappl1 80 20907 0 20309 16 2 14 16 0 8 0 amappl 88 26625 0 26468 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 261 0 261 3 2 1 1 0 8 1 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 60 0 4 2 0 2 2 0 8 0 uaddrrnd 24 3215 0 3185 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3215 0 3185 1 0 1 1 0 8 0 vmmpekpl 168 25722 0 25664 4 0 4 4 0 8 0 vmmpepl 168 205659 0 203683 139 34 105 119 0 357 0 vmsppl 488 3214 0 3184 5 0 5 5 0 8 0 rwobjpl 80 58538 0 51614 153 2 151 152 0 8 0 pdppl 4096 6438 0 6368 126 54 72 86 0 8 2 pvpl 32 24716 0 0 199 0 199 199 0 265 0 pmappl 256 3214 0 3184 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 353 0 100 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7638ce0ced40, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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:666 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,30) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(30) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83347140) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff83363e2c) at panic+0x103 sys/kern/subr_prf.c:217 pool_p_free(ffffffff839bb320,fffffd805eff6f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_reclaim(ffffffff839bb320) at pool_reclaim+0x2c2 sys/kern/subr_pool.c:1152 pool_reclaim_all() at pool_reclaim_all+0x48 sys/kern/subr_pool.c:-1 end trace frame: 0xffff80003c4b3550, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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:666 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,30) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(30) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83347140) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff83363e2c) at panic+0x103 sys/kern/subr_prf.c:217 pool_p_free(ffffffff839bb320,fffffd805eff6f90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_reclaim(ffffffff839bb320) at pool_reclaim+0x2c2 sys/kern/subr_pool.c:1152 pool_reclaim_all() at pool_reclaim_all+0x48 sys/kern/subr_pool.c:-1 kern_sysctl(ffff80003c4b3574,1,200000000180,ffff80003c4b35a8,200000001180,4,d99cfffc49365172) at kern_sysctl+0x1095 sys/kern/kern_sysctl.c:686 sys_sysctl(ffff800037810aa0,ffff80003c4b36e0,ffff80003c4b3630) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1 syscall(ffff80003c4b36e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4b36e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1200d9feb00, count: -18