uvm_fault(0xffffffff83b11080, 0xffff800020742004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs_freefile+0x11e: movl 0x4(%rbx),%r13d TID PID UID PRFLAGS PFLAGS CPU COMMAND *202042 9543 0 0x2 0 1K syz-executor 139232 67481 0 0x2 0x1 0 syz-executor ffs_freefile(fffffd80721ae850,cbff,6000) at ffs_freefile+0x11e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_freefile(fffffd80721ae850,cbff,6000) at ffs_freefile+0x11e sys/ufs/ffs/ffs_alloc.c:1377 ffs_inode_free(fffffd80721ae850,cbff,6000) at ffs_inode_free+0x44 sys/ufs/ffs/ffs_alloc.c:1355 ufs_inactive(ffff80002a2e4ac0) at ufs_inactive+0x29c sys/ufs/ufs/ufs_inode.c:94 VOP_INACTIVE(fffffd805f661ca8,ffff80002a222a70) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 vput(fffffd805f661ca8) at vput+0xe5 sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c628648,fffffd805f661ca8,ffff80002a2e4c28) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a222a70,ffffff9c,7b2b71d46be0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a2e4da0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2e4da0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b2b71d47090, count: 6 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 *cpu1: uvm_fault(0xffffffff83b11080, 0xffff800020742004, 0, 1) -> d ddb{1}> trace ffs_freefile(fffffd80721ae850,cbff,6000) at ffs_freefile+0x11e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_freefile(fffffd80721ae850,cbff,6000) at ffs_freefile+0x11e sys/ufs/ffs/ffs_alloc.c:1377 ffs_inode_free(fffffd80721ae850,cbff,6000) at ffs_inode_free+0x44 sys/ufs/ffs/ffs_alloc.c:1355 ufs_inactive(ffff80002a2e4ac0) at ufs_inactive+0x29c sys/ufs/ufs/ufs_inode.c:94 VOP_INACTIVE(fffffd805f661ca8,ffff80002a222a70) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 vput(fffffd805f661ca8) at vput+0xe5 sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c628648,fffffd805f661ca8,ffff80002a2e4c28) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a222a70,ffffff9c,7b2b71d46be0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a2e4da0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2e4da0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b2b71d47090, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2e4a00 rbx 0xffff800020742000 rdx 0 rcx 0xffff80002a222a70 rax 0xfffffd8072051358 r8 0xffffffffffffffff r9 0xfffffd80097fd478 r10 0xd72792e303cf9822 r11 0xf6e85d57fe86cec r12 0x2 r13 0 r14 0xffff800000c31800 r15 0xcbff __ALIGN_SIZE+0xbbff rip 0xffffffff8123e27e ffs_freefile+0x11e cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a2e4970 ss 0x10 ffs_freefile+0x11e: movl 0x4(%rbx),%r13d ddb{1}> show proc PROC (syz-executor) tid=202042 pid=9543 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2227d8,0xffff80002a222550 process=0xffff8000ffff4e78 user=0xffff80002a2df000, vmspace=0xfffffd800b063988 estcpu=36, cpticks=9, pctcpu=0.0, user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83997 83866 28597 0 2 0 syz-executor 83997 65218 28597 0 3 0x4000080 fsleep syz-executor 33924 13054 92173 0 2 0 syz-executor 33924 304821 92173 0 3 0x4000080 fsleep syz-executor 78546 415118 13829 0 2 0 syz-executor 78546 247290 13829 0 2 0x4000000 syz-executor 23221 405565 59235 0 2 0 syz-executor 23221 59640 59235 0 3 0x4000080 fsleep syz-executor 17609 181495 19797 0 2 0 syz-executor 17609 330788 19797 0 3 0x4000080 fsleep syz-executor 18333 115898 47401 0 3 0x80 nanoslp syz-executor 18333 214937 47401 0 3 0x4000080 sbwait syz-executor 18333 369295 47401 0 3 0x4000080 fsleep syz-executor 90531 20866 1 0 3 0x82 nanoslp getty 98437 105908 0 0 3 0x14280 nfsidl nfsio 78512 511034 0 0 3 0x14280 nfsidl nfsio 93030 216749 0 0 3 0x14280 nfsidl nfsio 93605 330732 0 0 3 0x14280 nfsidl nfsio 83902 19912 0 0 3 0x14280 nfsidl nfsio 19525 281546 0 0 3 0x14280 nfsidl nfsio 58295 114647 0 0 3 0x14280 nfsidl nfsio 48124 5250 0 0 3 0x14280 nfsidl nfsio 91944 323375 0 0 3 0x14280 nfsidl nfsio 46501 280924 0 0 3 0x14280 nfsidl nfsio 43672 135195 0 0 3 0x14280 nfsidl nfsio 35679 293825 0 0 3 0x14280 nfsidl nfsio 12269 250231 0 0 3 0x14280 nfsidl nfsio 60832 212499 0 0 3 0x14280 nfsidl nfsio 63548 227795 0 0 3 0x14280 nfsidl nfsio 12937 466649 0 0 3 0x14280 nfsidl nfsio 60503 290336 0 0 3 0x14280 nfsidl nfsio 87656 27735 0 0 3 0x14280 nfsidl nfsio 30142 518887 0 0 3 0x14280 nfsidl nfsio 86237 36702 0 0 3 0x14280 nfsidl nfsio 92173 264354 67481 0 3 0x82 nanoslp syz-executor 47401 299763 67481 0 3 0x82 nanoslp syz-executor 97035 392774 67481 0 3 0x82 nanoslp syz-executor 59235 331381 67481 0 3 0x82 nanoslp syz-executor 19797 354793 67481 0 3 0x82 nanoslp syz-executor * 9543 202042 67481 0 7 0x2 syz-executor 28597 401251 67481 0 3 0x82 nanoslp syz-executor 13829 62819 67481 0 3 0x82 nanoslp syz-executor 67481 139232 1 0 7 0x3 syz-executor 69128 325306 0 0 3 0x14200 bored smr 69327 433283 0 0 2 0x14200 zerothread 53137 323893 0 0 3 0x14200 aiodoned aiodoned 86687 208681 0 0 3 0x14200 syncer update 40293 521971 0 0 3 0x14200 cleaner cleaner 27991 520992 0 0 3 0x14200 reaper reaper 3748 154681 0 0 3 0x14200 pgdaemon pagedaemon 7198 239495 0 0 3 0x14200 bored viomb 42207 90350 0 0 3 0x40014200 acpi0 acpi0 78156 66622 0 0 3 0x40014200 idle1 63587 293615 0 0 3 0x14200 bored softnet1 97758 86365 0 0 3 0x14200 bored softnet0 99181 52789 0 0 3 0x14200 bored systqmp 2237 490357 0 0 3 0x14200 bored systq 6398 312379 0 0 3 0x14200 tmoslp softclockmp 17661 183889 0 0 3 0x40014200 tmoslp softclock 35442 359177 0 0 3 0x40014200 idle0 1 106053 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 9543 (syz-executor) thread 0xffff80002a222a70 (202042) exclusive rrwlock inode r = 0 (0xfffffd80721ae8f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1893 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80675e6570) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #10 namei+0x7c5 sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1893 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #13 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a6adc0) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11084 12032K 12346K 166960K 12668 0 pcb 19 13K 13K 166960K 65 0 rtable 215 6K 7K 166960K 364 0 pf 38 18K 24K 166960K 82 0 ifaddr 43 7K 7K 166960K 54 0 ifgroup 60 2K 2K 166960K 77 0 sysctl 4 1K 9K 166960K 9 0 counters 72 37K 37K 166960K 84 0 ioctlops 0 0K 4K 166960K 1524 0 iov 0 0K 12K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 2 4K 4K 166960K 6 0 vnodes 1358 85K 86K 166960K 1691 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 61K 89K 166960K 380 0 sigio 0 0K 0K 166960K 4 0 proc 21 33K 164K 166960K 605 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 33 0 in_multi 96 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 442 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 132 82K 185K 166960K 5305 0 UVM aobj 16 2K 2K 166960K 16 0 pinsyscall 19 38K 104K 166960K 1544 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 13 0K 2K 166960K 36 0 temp 43 9115K 9206K 166960K 10532 0 kqueue 1 2K 22K 166960K 58 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}>