panic: kernel diagnostic assertion "(p->pfik_flagrefs == 0) || (p->pfik_flagrefs == 1)" failed: file "/syzkaller/managers/main/kernel/sys/net/pf_if.c", line 907 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *250768 83534 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83419d82) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff834577f4,ffffffff8343bb5c,38b,ffffffff833c7c71) at __assert+0x29 sys/kern/subr_prf.c:-1 pfi_clear_flags(ffff80003a121ad0,0) at pfi_clear_flags+0x41d sys/net/pf_if.c:893 pfioctl(14900,c028445a,ffff80003a121ad0,3,ffff8000398ee2c0) at pfioctl+0xf6a sys/net/pf_ioctl.c:3910 VOP_IOCTL(fffffd806b084ea0,c028445a,ffff80003a121ad0,3,fffffd8007ffd820,ffff8000398ee2c0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807a9b7a60,c028445a,ffff80003a121ad0,ffff8000398ee2c0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff8000398ee2c0,ffff80003a121ca0,ffff80003a121bf0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80003a121ca0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a121ca0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x925c7cd3c10, count: 5 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "(p->pfik_flagrefs == 0) || (p->pfik_flagrefs == 1)" failed: file "/syzkaller/managers/main/kernel/sys/net/pf_if.c", line 907 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83419d82) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff834577f4,ffffffff8343bb5c,38b,ffffffff833c7c71) at __assert+0x29 sys/kern/subr_prf.c:-1 pfi_clear_flags(ffff80003a121ad0,0) at pfi_clear_flags+0x41d sys/net/pf_if.c:893 pfioctl(14900,c028445a,ffff80003a121ad0,3,ffff8000398ee2c0) at pfioctl+0xf6a sys/net/pf_ioctl.c:3910 VOP_IOCTL(fffffd806b084ea0,c028445a,ffff80003a121ad0,3,fffffd8007ffd820,ffff8000398ee2c0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807a9b7a60,c028445a,ffff80003a121ad0,ffff8000398ee2c0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff8000398ee2c0,ffff80003a121ca0,ffff80003a121bf0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80003a121ca0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a121ca0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x925c7cd3c10, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003a121680 rbx 0xffff80000040ba00 rdx 0xffff8000015d7a00 rcx 0 rax 0xffff8000398ee2c0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf0babed6fb5ae825 r11 0x4c1d68fbb0a86ce2 r12 0 r13 0x2 r14 0 r15 0x1 rip 0xffffffff82d72bf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003a121670 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=250768 pid=83534 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000398efa18,0xffff80002a7e1a30 process=0xffff80002f0bd698 user=0xffff80003a11c000, vmspace=0xfffffd806cb0c5d0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 86160 518712 39949 0 2 0 syz-executor 86160 96669 39949 0 3 0x4000080 ttyin syz-executor 83534 163447 86526 0 2 0 syz-executor *83534 250768 86526 0 7 0x4000000 syz-executor 6881 408785 64926 0 2 0 syz-executor 6881 15677 64926 0 2 0x4000000 syz-executor 13478 435430 48859 0 3 0x80 nanoslp syz-executor 13478 21071 48859 0 3 0x4000080 kqread syz-executor 13478 97318 48859 0 3 0x4000080 fsleep syz-executor 56401 276094 31039 0 2 0 syz-executor 56401 226657 31039 0 2 0x4000000 syz-executor 56401 156984 31039 0 3 0x4000080 fsleep syz-executor 79986 424927 78537 60929 3 0x90 nanoslp syz-executor 79986 511931 78537 60929 3 0x4000090 pipewr syz-executor 79986 50630 78537 60929 3 0x4000090 fsleep syz-executor 98556 69911 77942 0 3 0x90 nanoslp syz-executor 98556 159053 77942 0 3 0x4000090 kqpoll syz-executor 98556 163395 77942 0 3 0x4000090 fsleep syz-executor 31039 68510 35659 0 3 0x82 nanoslp syz-executor 49771 499746 0 0 3 0x14200 acct acct 39949 465537 35659 0 2 0xc82 syz-executor 10481 432162 35659 0 2 0x2 syz-executor 48859 461769 35659 0 3 0x82 nanoslp syz-executor 86526 342663 35659 0 2 0xc82 syz-executor 78537 6839 35659 0 3 0x82 nanoslp syz-executor 77942 59266 35659 0 3 0x82 nanoslp syz-executor 64926 307751 35659 0 3 0x82 nanoslp syz-executor 35659 45559 7996 0 3 0x82 kqread syz-executor 7996 28068 18880 0 3 0x10008a sigsusp ksh 18880 8471 59102 0 3 0x98 kqread sshd-session 59102 452956 5511 0 3 0x92 kqread sshd-session 37886 519462 1 0 3 0x100083 ttyin getty 5511 228643 1 0 3 0x88 kqread sshd 50650 495333 62067 73 3 0x1100090 kqread syslogd 62067 321186 1 0 3 0x100082 sbwait syslogd 41205 234109 1 0 3 0x100080 kqread resolvd 35090 326518 55236 77 3 0x100092 kqread dhcpleased 198 144732 55236 77 3 0x100092 kqread dhcpleased 55236 28643 1 0 3 0x80 kqread dhcpleased 68376 155875 0 0 3 0x14200 bored smr 29141 459730 0 0 2 0x14200 zerothread 39960 69544 0 0 3 0x14200 aiodoned aiodoned 64226 8578 0 0 3 0x14200 syncer update 65025 259174 0 0 3 0x14200 cleaner cleaner 37713 170087 0 0 3 0x14200 reaper reaper 16626 450173 0 0 3 0x14200 pgdaemon pagedaemon 39799 142488 0 0 3 0x14200 bored viomb 31028 115639 0 0 3 0x40014200 acpi0 acpi0 79049 301137 0 0 3 0x14200 bored softnet0 44378 224174 0 0 3 0x14200 bored systqmp 47453 108567 0 0 3 0x14200 bored systq 67451 401774 0 0 3 0x40014200 tmoslp softclock 47322 314007 0 0 3 0x40014200 idle0 1 456574 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11057 12171K 12516K 166960K 12754 0 pcb 17 14K 20K 166960K 338 0 rtable 185 10K 11K 166960K 518 0 pf 31 13K 93K 166960K 304 0 ifaddr 30 5K 7K 166960K 72 0 ifgroup 38 1K 2K 166960K 100 0 sysctl 4 1K 9K 166960K 12 0 counters 30 17K 18K 166960K 58 0 ioctlops 0 0K 4K 166960K 193 0 iov 0 0K 16K 166960K 32 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1357 85K 86K 166960K 2203 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 122 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 831 0 sigio 0 0K 0K 166960K 14 0 proc 63 67K 75K 166960K 601 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 110 0 in_multi 62 4K 7K 166960K 142 0 ether_multi 1 0K 0K 166960K 5 0 mrt 2 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 451 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 225 143K 165K 166960K 8937 0 UVM aobj 34 4K 4K 166960K 37 0 pinsyscall 38 76K 94K 166960K 1961 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 58 0 NDP 8 0K 1K 166960K 48 0 temp 59 9071K 9196K 166960K 36003 0 kqueue 15 24K 30K 166960K 125 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 83 0 80 1 0 1 1 0 8 0 rtentry 136 142 0 76 4 0 4 4 0 8 0 unpcb 144 428 0 409 4 0 4 4 0 8 3 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpcb 736 214 0 209 7 0 7 7 0 8 6 arp 96 24 0 10 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 328 847 0 838 18 9 9 18 0 8 8 nd6 112 31 0 18 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 19 0 19 1 0 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 8 0 6 1 0 1 1 0 8 0 pffrag 232 10 0 4 2 1 1 1 0 482 0 pffrnode 88 9 0 3 2 1 1 1 0 8 0 pffrent 40 80 0 74 2 1 1 1 0 8 0 pfrktable 1344 9 0 4 2 1 1 1 0 8 0 pfanchor 1288 47 0 1 4 0 4 4 0 8 0 pftag 88 2 0 2 2 1 1 1 0 8 1 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 128 12 0 6 1 0 1 1 0 8 0 pfstate 384 6 0 3 1 0 1 1 0 8 0 pfrule 1360 14 0 13 2 1 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 589 0 285 29 0 29 29 0 8 6 art_table 40 591 0 285 5 0 5 5 0 8 0 art_node 32 140 0 81 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semapl 112 83 0 73 1 0 1 1 0 8 0 shmpl 112 34 0 3 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2853 0 1394 92 0 92 92 0 8 0 ffsino 256 2854 0 1394 92 0 92 92 0 8 0 nchpl 144 3976 0 2279 64 0 64 64 0 8 0 rtmask 32 6 0 6 1 0 1 1 0 8 1 vnodes 216 3446 0 0 192 0 192 192 0 8 0 namei 1024 13531 0 13529 2 1 1 2 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 57 0 40 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 12137 0 12137 9 7 2 8 1 8 2 plimitpl 152 180 0 163 1 0 1 1 0 8 0 sigapl 424 1107 0 1064 7 1 6 6 0 8 1 knotepl 120 28014 0 27960 30 15 15 17 0 8 13 kqueuepl 184 290 0 278 4 0 4 4 0 8 3 pipepl 304 197 0 169 5 0 5 5 0 8 2 fdescpl 448 1093 0 1064 5 1 4 5 0 8 0 filepl 120 6937 0 6714 14 1 13 13 0 8 5 lockfpl 104 366 0 363 2 0 2 2 0 8 1 lockfspl 48 163 0 160 1 0 1 1 0 8 0 sessionpl 144 55 0 46 1 0 1 1 0 8 0 pgrppl 48 74 0 57 1 0 1 1 0 8 0 ucredpl 104 1328 0 1312 1 0 1 1 0 8 0 zombiepl 144 1064 0 1064 1 0 1 1 0 8 1 processpl 1152 1107 0 1064 4 0 4 4 0 8 0 procpl 664 2064 0 2010 7 1 6 6 0 8 0 sockpl 552 1460 0 1429 17 6 11 16 0 8 8 mcl64k 65536 137 0 135 2 1 1 1 0 8 0 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 7 0 7 2 1 1 1 0 8 1 mcl4k 4096 3469 0 3419 16 7 9 14 0 8 2 mcl2k 2048 649 0 647 4 0 4 4 0 8 3 mtagpl 96 16 0 10 1 0 1 1 0 8 0 mbufpl 256 12448 0 12201 19 1 18 18 0 8 2 bufpl 280 4624 0 105 323 0 323 323 0 8 0 anonpl 24 173668 0 170388 54 9 45 45 0 187 19 amapchunkpl 152 29734 0 29255 48 15 33 35 0 158 13 amappl16 200 2903 0 2871 18 6 12 15 0 8 8 amappl15 192 20 0 20 1 1 0 1 0 8 0 amappl14 184 430 0 429 1 0 1 1 0 8 0 amappl13 176 119 0 109 1 0 1 1 0 8 0 amappl12 168 1338 0 1310 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 80 0 70 1 0 1 1 0 8 0 amappl9 144 267 0 266 2 1 1 1 0 8 0 amappl8 136 124 0 122 1 0 1 1 0 8 0 amappl7 128 148 0 136 1 0 1 1 0 8 0 amappl6 120 179 0 177 1 0 1 1 0 8 0 amappl5 112 97 0 88 1 0 1 1 0 8 0 amappl4 104 271 0 255 1 0 1 1 0 8 0 amappl3 96 5762 0 5651 5 1 4 4 0 8 0 amappl2 88 534 0 479 2 0 2 2 0 8 0 amappl1 80 12339 0 11785 16 1 15 15 0 8 3 amappl 88 8081 0 7918 5 0 5 5 0 92 0 uvmvnodes 80 121 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 128 255 0 255 2 1 1 1 0 8 1 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 36 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1093 0 1064 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1093 0 1064 1 0 1 1 0 8 0 vmmpekpl 168 9962 0 9920 3 0 3 3 0 8 0 vmmpepl 168 74424 0 72631 93 2 91 91 0 357 10 vmsppl 368 1092 0 1064 4 1 3 4 0 8 0 rwobjpl 40 21571 0 20560 13 0 13 13 0 8 2 pdppl 4096 2192 0 2128 104 38 66 80 0 8 2 pvpl 32 483073 0 474061 145 20 125 125 0 265 38 pmappl 216 1092 0 1064 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 391 0 56 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83419d82) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff834577f4,ffffffff8343bb5c,38b,ffffffff833c7c71) at __assert+0x29 sys/kern/subr_prf.c:-1 pfi_clear_flags(ffff80003a121ad0,0) at pfi_clear_flags+0x41d sys/net/pf_if.c:893 pfioctl(14900,c028445a,ffff80003a121ad0,3,ffff8000398ee2c0) at pfioctl+0xf6a sys/net/pf_ioctl.c:3910 VOP_IOCTL(fffffd806b084ea0,c028445a,ffff80003a121ad0,3,fffffd8007ffd820,ffff8000398ee2c0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807a9b7a60,c028445a,ffff80003a121ad0,ffff8000398ee2c0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff8000398ee2c0,ffff80003a121ca0,ffff80003a121bf0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80003a121ca0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a121ca0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x925c7cd3c10, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83419d82) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff834577f4,ffffffff8343bb5c,38b,ffffffff833c7c71) at __assert+0x29 sys/kern/subr_prf.c:-1 pfi_clear_flags(ffff80003a121ad0,0) at pfi_clear_flags+0x41d sys/net/pf_if.c:893 pfioctl(14900,c028445a,ffff80003a121ad0,3,ffff8000398ee2c0) at pfioctl+0xf6a sys/net/pf_ioctl.c:3910 VOP_IOCTL(fffffd806b084ea0,c028445a,ffff80003a121ad0,3,fffffd8007ffd820,ffff8000398ee2c0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807a9b7a60,c028445a,ffff80003a121ad0,ffff8000398ee2c0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff8000398ee2c0,ffff80003a121ca0,ffff80003a121bf0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80003a121ca0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a121ca0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x925c7cd3c10, count: -10