login: oLoLpanic: pWoAoRlN_IcNacGhe: _SiPtLe mN_mOTa giLOcWE_RcEhDe cOkN: SmbYSuCfApLlL cp1u37 fr-ee5 1l6i4st8 EmoXIdTif 0ie d9 : iStopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND *288908 71305 0 0x2 0 0 syz-executor.0 266454 59823 0 0x14000 0x200 1 softnet savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7fffff3630, 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 pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd807f028e00+16 0x0!=0x23a117b19461a9f ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7fffff3630, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800020b63d50 rbx 0 rdx 0xffff800020ab0290 rcx 0 rax 0x38 r8 0xffffffff81bcb87f kprintf+0x16f r9 0x1 r10 0x25 r11 0xa154fd809b049f63 r12 0 r13 0 r14 0xffff800020ab0290 r15 0 rip 0xffffffff8119f3f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800020b63cd0 ss 0 savectx+0xb1: movl $0,%gs:0x530 ddb{0}> show proc PROC (syz-executor.0) pid=288908 stat=onproc flags process=2 proc=0 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0018,0xffff800020ab0790 process=0xffff800020add500 user=0xffff800020b5e000, vmspace=0xfffffd807f0085c0 estcpu=36, cpticks=1, pctcpu=0.4 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23937 317612 0 0 3 0x14200 bored sosplice 65448 388480 23239 0 3 0x82 piperd syz-executor.1 *71305 288908 23239 0 7 0x2 syz-executor.0 23239 418456 65721 0 3 0x82 nanosleep syz-fuzzer 23239 184287 65721 0 3 0x4000082 nanosleep syz-fuzzer 23239 169733 65721 0 2 0x4000002 syz-fuzzer 23239 212810 65721 0 3 0x4000082 thrsleep syz-fuzzer 23239 483748 65721 0 3 0x4000082 thrsleep syz-fuzzer 23239 500490 65721 0 3 0x4000082 thrsleep syz-fuzzer 23239 153281 65721 0 3 0x4000082 thrsleep syz-fuzzer 23239 91401 65721 0 3 0x4000082 thrsleep syz-fuzzer 23239 514689 65721 0 3 0x4000082 kqread syz-fuzzer 23239 163984 65721 0 3 0x4000082 thrsleep syz-fuzzer 65721 54433 76989 0 3 0x10008a pause ksh 76989 394278 99576 0 2 0x12 sshd 48695 80324 1 0 3 0x100083 ttyin getty 99576 87432 1 0 3 0x80 select sshd 52677 253107 13145 74 3 0x100092 bpf pflogd 13145 310200 1 0 3 0x80 netio pflogd 118 22881 57910 73 3 0x100090 kqread syslogd 57910 193698 1 0 3 0x100082 netio syslogd 49882 12664 1 77 3 0x100090 poll dhclient 14513 414699 1 0 3 0x80 poll dhclient 68942 455860 0 0 2 0x14200 zerothread 31331 68272 0 0 3 0x14200 aiodoned aiodoned 57831 330322 0 0 3 0x14200 syncer update 25720 445460 0 0 3 0x14200 cleaner cleaner 77474 118629 0 0 3 0x14200 reaper reaper 46573 213865 0 0 3 0x14200 pgdaemon pagedaemon 26110 492944 0 0 3 0x14200 bored crynlk 4487 147975 0 0 3 0x14200 bored crypto 4203 73311 0 0 3 0x40014200 acpi0 acpi0 15914 413450 0 0 3 0x40014200 idle1 59823 266454 0 0 7 0x14200 softnet 91417 315026 0 0 3 0x14200 bored systqmp 29603 247473 0 0 3 0x14200 bored systq 85003 391989 0 0 3 0x40014200 bored softclock 99298 207568 0 0 3 0x40014200 idle0 63528 341123 0 0 3 0x14200 bored smr 1 31447 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &diskp->dk_mtx r = 0 (0xffff800000172898) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 disk_busy+0x21 sys/kern/subr_disk.c:1235 #4 sdstart+0x3dc sys/scsi/sd.c:711 #5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:394 [inline] #5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:410 #6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:586 #7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:525 #8 sdstrategy+0x187 sys/scsi/sd.c:582 #9 spec_strategy+0x74 sys/kern/spec_vnops.c:468 #10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:727 #11 bwrite+0x1b9 sys/kern/vfs_bio.c:738 #12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #13 ffs_truncate+0xc76 #14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357 #15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818 #17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #18 Xsyscall+0x128 Process 71305 (syz-executor.0) thread 0xffff800020ab0290 (288908) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826346d0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:434 #3 sleep_finish+0x113 sys/kern/kern_synch.c:374 #4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:403 [inline] #4 sleep_finish_all+0x32 sys/kern/kern_synch.c:183 #5 tsleep+0x1cf sys/kern/kern_synch.c:153 #6 biowait+0xa1 sys/kern/vfs_bio.c:1231 #7 bwrite+0x1e4 sys/kern/vfs_bio.c:747 #8 ufs_dirremove+0x291 #9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1330 #10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818 #12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e7845e8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323 #8 ufs_lookup+0x14b4 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80691c11a8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 exclusive mutex &diskp->dk_mtx r = 0 (0xffff800000172898) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 disk_busy+0x21 sys/kern/subr_disk.c:1235 #4 sdstart+0x3dc sys/scsi/sd.c:711 #5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:394 [inline] #5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:410 #6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:586 #7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:525 #8 sdstrategy+0x187 sys/scsi/sd.c:582 #9 spec_strategy+0x74 sys/kern/spec_vnops.c:468 #10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:727 #11 bwrite+0x1b9 sys/kern/vfs_bio.c:738 #12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #13 ffs_truncate+0xc76 #14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357 #15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818 #17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #18 Xsyscall+0x128 Process 59823 (softnet) thread 0xffff800020a10000 (266454) shared rwlock netlock r = 0 (0xffffffff8250a038) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 if_input_process+0x84 sys/net/if.c:942 #2 ifiq_process+0x80 sys/net/ifq.c:607 #3 taskq_thread+0x9c sys/kern/kern_task.c:368 #4 proc_trampoline+0x1c shared rwlock softnet r = 0 (0xffff8000000230e0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 taskq_thread+0x8f sys/kern/kern_task.c:367 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9503 6417K 7055K 78643K 10919 0 0 pcb 13 8K 8K 78643K 44 0 0 rtable 105 4K 4K 78643K 290 0 0 ifaddr 62 12K 13K 78643K 90 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1473 0 0 iov 0 0K 16K 78643K 27 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1221 77K 77K 78643K 1337 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 4 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 1K 78643K 74 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 4 9K 25K 78643K 151 0 0 sigio 0 0K 0K 78643K 8 0 0 proc 60 63K 83K 78643K 446 0 0 subproc 32 2K 2K 78643K 34 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 36 2K 2K 78643K 52 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 42 185K 185K 78643K 42 0 0 exec 0 0K 1K 78643K 224 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 106 21K 24K 78643K 1453 0 0 UVM aobj 30 2K 2K 78643K 30 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 49 0 0 NDP 10 0K 0K 78643K 19 0 0 temp 114 3551K 3617K 78643K 4023 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 9 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 29 0 27 1 0 1 1 0 8 0 rtentry 112 62 0 21 2 0 2 2 0 8 0 unpcb 120 123 0 113 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 16 0 16 1 1 0 1 0 8 0 tcpcb 544 57 0 53 1 0 1 1 0 8 0 inpcb 280 442 0 435 3 0 3 3 0 8 2 nd6 48 7 0 4 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 ppxss 1128 3 0 3 1 0 1 1 0 8 1 pffrag 232 5 0 5 1 0 1 1 0 482 1 pffrnode 88 5 0 5 1 0 1 1 0 8 1 pffrent 40 141 0 141 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 20 0 0 1 0 1 1 0 8 0 pfstkey 112 20 0 0 1 0 1 1 0 8 0 pfstate 328 20 0 0 2 0 2 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 270 0 69 14 1 13 14 0 8 0 art_table 32 271 0 69 2 0 2 2 0 8 0 art_node 16 60 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 51 0 38 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 72 0 62 1 0 1 1 0 8 0 shmpl 112 28 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1634 0 231 46 0 46 46 0 8 0 ffsino 272 1634 0 231 94 0 94 94 0 8 0 nchpl 144 2055 0 443 61 0 61 61 0 8 0 uvmvnodes 72 1754 0 0 32 0 32 32 0 8 0 vnodes 208 1754 0 0 93 0 93 93 0 8 0 namei 1024 6193 0 6193 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 6083 0 6083 8 1 7 7 0 8 7 plimitpl 152 33 0 25 1 0 1 1 0 8 0 sigapl 432 349 0 335 3 1 2 3 0 8 0 futexpl 56 3596 0 3596 1 0 1 1 0 8 1 knotepl 112 66 0 47 1 0 1 1 0 8 0 kqueuepl 104 28 0 26 1 0 1 1 0 8 0 pipepl 160 252 0 233 2 0 2 2 0 8 1 fdescpl 488 350 0 335 3 0 3 3 0 8 0 filepl 152 2590 0 2490 6 0 6 6 0 8 2 lockfpl 104 41 0 40 1 0 1 1 0 8 0 lockfspl 48 17 0 16 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 26 0 15 1 0 1 1 0 8 0 ucredpl 96 399 0 390 1 0 1 1 0 8 0 zombiepl 144 335 0 335 1 0 1 1 0 8 1 processpl 896 366 0 335 4 0 4 4 0 8 0 procpl 632 685 0 645 5 0 5 5 0 8 1 sosppl 128 53 0 53 1 0 1 1 0 8 1 sockpl 384 609 0 590 5 0 5 5 0 8 3 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 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 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 137 0 0 18 0 18 18 0 8 1 mtagpl 80 14 0 0 1 0 1 1 0 8 0 mbufpl 256 282 0 0 18 0 18 18 0 8 0 bufpl 256 6844 0 1312 346 0 346 346 0 8 0 anonpl 16 51522 0 31182 84 1 83 83 0 124 0 amapchunkpl 152 2193 0 2041 14 0 14 14 0 158 6 amappl16 192 1749 0 624 57 0 57 57 0 8 0 amappl14 176 112 0 105 1 0 1 1 0 8 0 amappl13 168 1 0 1 1 0 1 1 0 8 1 amappl12 160 63 0 60 1 0 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 31 0 23 1 0 1 1 0 8 0 amappl9 136 603 0 599 1 0 1 1 0 8 0 amappl8 128 170 0 145 1 0 1 1 0 8 0 amappl7 120 38 0 34 1 0 1 1 0 8 0 amappl6 112 60 0 49 1 0 1 1 0 8 0 amappl5 104 193 0 179 1 0 1 1 0 8 0 amappl4 96 597 0 570 1 0 1 1 0 8 0 amappl3 88 180 0 173 1 0 1 1 0 8 0 amappl2 80 1887 0 1821 3 1 2 3 0 8 0 amappl1 72 17484 0 17063 26 16 10 20 0 8 0 amappl 80 943 0 899 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 29 0 0 1 0 1 1 0 8 0 uaddrrnd 24 350 0 335 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 350 0 335 1 0 1 1 0 8 0 vmmpekpl 168 6911 0 6879 2 0 2 2 0 8 0 vmmpepl 168 50510 0 48341 144 11 133 137 0 357 32 vmsppl 368 349 0 335 2 0 2 2 0 8 0 pdppl 4096 707 0 670 6 0 6 6 0 8 1 pvpl 32 170503 0 147026 196 0 196 196 0 265 3 pmappl 232 349 0 335 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 513 0 4 15 0 15 15 0 8 0