uvm_fault(0xffffffff836190a8, 0xffff800024892018, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 248379 37820 0 0x2 0 1 syz-executor *271885 57649 73 0x1100010 0 0K syslogd ffs2_balloc(fffffd806e4cc118,3da2f,68,fffffd807f7d3958,1,ffff80002a068728) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a0687b0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806e285638,ffff80002a0689d0,3,fffffd807f7d3958) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd807a7f4000,ffff80002a0689d0,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd1c8,e,ffff80002a0689d0,0,ffff80002a068a90) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd1c8,ffff80002a068b40,ffff80002a068a90) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a068b40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a068b40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79b6982c59b0, count: 7 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 *cpu0: uvm_fault(0xffffffff836190a8, 0xffff800024892018, 0, 1) -> d ddb{0}> trace ffs2_balloc(fffffd806e4cc118,3da2f,68,fffffd807f7d3958,1,ffff80002a068728) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a0687b0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806e285638,ffff80002a0689d0,3,fffffd807f7d3958) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd807a7f4000,ffff80002a0689d0,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd1c8,e,ffff80002a0689d0,0,ffff80002a068a90) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd1c8,ffff80002a068b40,ffff80002a068a90) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a068b40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a068b40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79b6982c59b0, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a0686d0 rbx 0 rdx 0 rcx 0xffff800024892000 rax 0x3 r8 0xffffffffffffffff r9 0xffff80002a068728 r10 0xf6cffe4a5ee4daf9 r11 0x1c47418d58448e97 r12 0x10 r13 0x1 r14 0xffffffff r15 0xfffffd807c5c2c18 rip 0xffffffff8290659e ffs2_balloc+0x9fe cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a068560 ss 0x10 ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 ddb{0}> show proc PROC (syslogd) tid=271885 pid=57649 tcnt=1 stat=onproc flags process=1100010 proc=0 runpri=17, usrpri=52, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffd960,0xffff8000ffffccc8 process=0xffff8000ffffa8d8 user=0xffff80002a063000, vmspace=0xfffffd806ec716e8 estcpu=2, cpticks=1, pctcpu=11.96, user=6, sys=2518, intr=426 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 59463 457934 2569 0 2 0 syz-executor 80796 342136 93126 0 2 0 syz-executor 80796 61874 93126 0 2 0x4000000 syz-executor 48533 178339 19087 0 2 0 syz-executor 72762 405504 9235 0 2 0 syz-executor 72762 360787 9235 0 3 0x4000080 fsleep syz-executor 18364 296572 37820 0 2 0 syz-executor 18364 386322 37820 0 2 0x4000000 syz-executor 18364 517392 37820 0 3 0x4000080 fsleep syz-executor 80842 388414 0 0 3 0x14280 nfsidl nfsio 87192 501517 0 0 3 0x14280 nfsidl nfsio 64378 338918 0 0 3 0x14280 nfsidl nfsio 94510 279095 0 0 3 0x14280 nfsidl nfsio 11038 357300 0 0 3 0x14280 nfsidl nfsio 7736 423200 0 0 3 0x14280 nfsidl nfsio 28500 138355 0 0 3 0x14280 nfsidl nfsio 15417 76106 0 0 3 0x14280 nfsidl nfsio 15764 351064 0 0 3 0x14280 nfsidl nfsio 40508 79195 0 0 3 0x14280 nfsidl nfsio 63522 358049 0 0 3 0x14280 nfsidl nfsio 72976 95680 0 0 3 0x14280 nfsidl nfsio 56920 140995 0 0 3 0x14280 nfsidl nfsio 16928 41594 0 0 3 0x14280 nfsidl nfsio 25522 260114 0 0 3 0x14280 nfsidl nfsio 75738 509069 0 0 3 0x14280 nfsidl nfsio 88460 171991 0 0 3 0x14280 nfsidl nfsio 40321 68442 0 0 3 0x14280 nfsidl nfsio 78860 36974 0 0 3 0x14280 nfsidl nfsio 72377 492847 0 0 3 0x14280 nfsidl nfsio 78213 84644 28016 0 2 0x482 syz-executor 93126 297629 28016 0 2 0x482 syz-executor 37820 248379 28016 0 7 0x2 syz-executor 2569 485890 28016 0 2 0x2 syz-executor 98437 480536 28016 0 2 0x2 syz-executor 9235 478464 28016 0 3 0x82 nanoslp syz-executor 1001 127722 28016 0 2 0x482 syz-executor 19087 486113 28016 0 2 0x482 syz-executor 76360 363168 0 0 3 0x14200 bored sosplice 28016 357223 24084 0 2 0x82 syz-executor 24084 209445 8325 0 3 0x10008a sigsusp ksh 8325 323607 57664 0 3 0x98 kqread sshd-session 57664 112854 41784 0 3 0x92 kqread sshd-session 11147 181266 1 0 3 0x100083 ttyin getty 41784 102762 1 0 3 0x88 kqread sshd 5831 102569 30639 74 3 0x1100092 bpf pflogd 30639 87885 1 0 3 0x80 sbwait pflogd *57649 271885 65221 73 7 0x1100010 syslogd 65221 188524 1 0 3 0x100082 sbwait syslogd 40027 284665 1 0 3 0x100080 kqread resolvd 67439 518348 79950 77 3 0x100092 kqread dhcpleased 47018 131123 79950 77 3 0x100092 kqread dhcpleased 79950 231691 1 0 3 0x80 kqread dhcpleased 71235 310769 0 0 3 0x14200 bored smr 95060 146298 0 0 2 0x14200 zerothread 85664 371098 0 0 3 0x14200 aiodoned aiodoned 48341 130929 0 0 2 0x14600 update 82106 108231 0 0 3 0x14200 cleaner cleaner 8252 426412 0 0 3 0x14200 reaper reaper 4039 299676 0 0 3 0x14200 pgdaemon pagedaemon 51626 502991 0 0 3 0x14200 bored viomb 6439 66365 0 0 3 0x40014200 acpi0 acpi0 38431 175016 0 0 3 0x40014200 idle1 57687 334828 0 0 3 0x14200 bored softnet3 51142 293229 0 0 3 0x14200 bored softnet2 56905 441050 0 0 3 0x14200 bored softnet1 22192 470818 0 0 3 0x14200 bored softnet0 89261 377549 0 0 2 0x14200 systqmp 78899 340195 0 0 3 0x14200 bored systq 38179 291491 0 0 3 0x14200 tmoslp softclockmp 56934 510630 0 0 3 0x40014200 tmoslp softclock 38152 377274 0 0 3 0x40014200 idle0 1 80011 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 57649 (syslogd) thread 0xffff8000ffffd1c8 (271885) exclusive rrwlock inode r = 0 (0xfffffd806e4cc1b0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_writev+0xd8 sys/kern/sys_generic.c:327 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8362f4e0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 vn_write+0x4e sys/kern/vfs_vnops.c:393 #2 dofilewritev+0x23c sys/kern/sys_generic.c:380 #3 sys_writev+0xd8 sys/kern/sys_generic.c:327 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 10155K 10357K 166960K 11611 0 pcb 17 12K 12K 166960K 61 0 rtable 241 8K 8K 166960K 1117 0 pf 36 18K 22K 166960K 102 0 ifaddr 43 7K 8K 166960K 146 0 ifgroup 55 2K 2K 166960K 153 0 sysctl 2 0K 0K 166960K 2 0 counters 64 36K 36K 166960K 114 0 ioctlops 0 0K 4K 166960K 1531 0 iov 0 0K 24K 166960K 21 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1374 86K 87K 166960K 1840 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 16 57K 89K 166960K 704 0 sigio 0 0K 0K 166960K 6 0 proc 72 91K 140K 166960K 1216 0 subproc 104 6K 6K 166960K 416 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 27 0 in_multi 99 7K 7K 166960K 374 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 724 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 219 73K 109K 166960K 6716 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 41 82K 99K 166960K 2400 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 14 0K 2K 166960K 101 0 temp 44 6815K 6943K 166960K 16922 0 kqueue 22 27K 29K 166960K 63 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 97 0 94 1 0 1 1 0 8 0 rtentry 112 388 0 278 4 0 4 4 0 8 0 unpcb 144 302 0 281 8 2 6 6 0 8 5 syncache 336 3 0 3 2 2 0 1 0 8 0 tcpcb 808 119 0 115 4 3 1 4 0 8 0 arp 120 70 0 52 1 0 1 1 0 8 0 inpcb 336 460 0 449 12 10 2 7 0 8 0 nd6 136 96 0 72 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 32 0 24 1 0 1 1 0 8 0 ppxss 1168 1 0 1 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 2 0 2 1 1 0 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 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 70 0 51 1 0 1 1 0 8 0 pfstkey 128 72 0 53 1 0 1 1 0 8 0 pfstate 376 71 0 52 3 0 3 3 0 8 1 pfrule 1344 24 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1527 0 1070 29 0 29 29 0 8 0 art_table 32 1528 0 1070 4 0 4 4 0 8 0 art_node 16 386 0 286 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 3 2 1 1 1 0 8 0 semapl 112 8 0 2 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1927 0 374 98 0 98 98 0 8 0 ffsino 272 1927 0 374 104 0 104 104 0 8 0 nchpl 144 2425 0 708 64 0 64 64 0 8 0 uvmvnodes 80 2461 0 0 51 0 51 51 0 8 0 vnodes 216 2461 0 0 137 0 137 137 0 8 0 namei 1024 9861 0 9861 5 4 1 1 0 8 1 percpumem 16 71 0 25 1 0 1 1 0 8 0 kstatmem 264 74 0 50 2 0 2 2 0 8 0 scxspl 216 12103 0 12103 12 11 1 8 1 8 1 plimitpl 152 79 0 62 1 0 1 1 0 8 0 sigapl 424 976 0 906 10 2 8 8 0 8 0 futexpl 64 3158 0 3156 4 3 1 1 0 8 0 knotepl 120 541 0 0 15 0 15 15 0 8 0 kqueuepl 216 74 0 62 1 0 1 1 0 8 0 pipepl 320 201 0 174 3 0 3 3 0 8 0 fdescpl 496 937 0 907 8 3 5 5 0 8 0 filepl 152 3655 0 3396 20 5 15 15 0 8 4 lockfpl 104 109 0 107 1 0 1 1 0 8 0 lockfspl 48 45 0 43 1 0 1 1 0 8 0 sessionpl 144 46 0 37 1 0 1 1 0 8 0 pgrppl 48 79 0 62 1 0 1 1 0 8 0 ucredpl 104 259 0 245 1 0 1 1 0 8 0 zombiepl 144 908 0 906 1 0 1 1 0 8 0 processpl 1160 976 0 906 7 1 6 6 0 8 0 procpl 648 1343 0 1269 8 1 7 7 0 8 0 sockpl 664 861 0 826 26 15 11 14 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 237 0 0 30 1 29 30 0 8 1 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 329 0 0 18 0 18 18 0 8 0 bufpl 280 6486 0 312 442 0 442 442 0 8 0 anonpl 24 216588 0 211272 99 13 86 92 0 185 44 amapchunkpl 152 21869 0 21368 52 12 40 46 0 158 16 amappl16 200 4612 0 4543 9 1 8 8 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 165 0 153 1 0 1 1 0 8 0 amappl13 176 10 0 9 1 0 1 1 0 8 0 amappl12 168 1964 0 1935 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 14 0 14 2 2 0 1 0 8 0 amappl9 144 136 0 136 2 2 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 154 0 141 1 0 1 1 0 8 0 amappl6 120 406 0 405 1 0 1 1 0 8 0 amappl5 112 234 0 222 1 0 1 1 0 8 0 amappl4 104 379 0 359 1 0 1 1 0 8 0 amappl3 96 3882 0 3783 5 1 4 4 0 8 0 amappl2 88 1012 0 944 2 0 2 2 0 8 0 amappl1 80 10579 0 10019 15 2 13 14 0 8 0 amappl 88 6152 0 5995 5 0 5 5 0 92 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 128 253 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 72 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 937 0 907 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 937 0 907 1 0 1 1 0 8 0 vmmpekpl 168 9147 0 9099 3 0 3 3 0 8 0 vmmpepl 168 66954 0 65126 93 4 89 90 0 357 4 vmsppl 440 936 0 907 6 2 4 5 0 8 0 rwobjpl 56 24780 0 21359 51 1 50 50 0 8 0 pdppl 4096 1881 0 1814 132 57 75 83 0 8 8 pvpl 32 44958 0 0 362 0 362 362 0 265 0 pmappl 248 936 0 907 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 445 0 79 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ffs2_balloc(fffffd806e4cc118,3da2f,68,fffffd807f7d3958,1,ffff80002a068728) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a0687b0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806e285638,ffff80002a0689d0,3,fffffd807f7d3958) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd807a7f4000,ffff80002a0689d0,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffd1c8,e,ffff80002a0689d0,0,ffff80002a068a90) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffd1c8,ffff80002a068b40,ffff80002a068a90) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a068b40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a068b40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79b6982c59b0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:164 syscall(ffff80002a112e30) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a112e30) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78df02ee2a10, count: 9 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:164 syscall(ffff80002a112e30) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a112e30) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78df02ee2a10, count: -6