login: panic: kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/vfs_vops.c", line 169 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 193475 62798 0 0x14000 0x200 0 reaper * 95273 13173 0 0x14000 0x200 1K systq db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821efc13) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82249f12,ffffffff822695b4,a9,ffffffff8222b23a) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd807efc3000,1,fffffd807f7bf7e0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80687ec868,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80687ec868,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80687ec868,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80687ec868,0) at closef+0x11c sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff8251f4f0) at taskq_thread+0x9c sys/kern/kern_task.c:369 end trace frame: 0x0, 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 kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/vfs_vops.c", line 169 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821efc13) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82249f12,ffffffff822695b4,a9,ffffffff8222b23a) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd807efc3000,1,fffffd807f7bf7e0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80687ec868,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80687ec868,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80687ec868,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80687ec868,0) at closef+0x11c sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff8251f4f0) at taskq_thread+0x9c sys/kern/kern_task.c:369 end trace frame: 0x0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a2cf10 rbx 0xffff800020a2cfc0 rdx 0xffff800020a18000 rcx 0 rax 0 r8 0xffffffff810939af kprintf+0x16f r9 0x1 r10 0x25 r11 0x116d89753826f78c r12 0x3000000008 r13 0xffff800020a2cf20 r14 0x100 r15 0x1 rip 0xffffffff81146c58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2cf00 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=95273 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a18750,0xffff800020a18280 process=0xffff800020a1a3d8 user=0xffff800020a28000, vmspace=0xffffffff8266bc88 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79691 197745 74629 32767 2 0x10 syz-executor.0 74629 312267 28515 0 3 0x82 wait syz-executor.0 98186 361912 42932 32767 3 0x90 nanosleep syz-executor.1 42932 350223 28515 0 3 0x82 wait syz-executor.1 70418 426811 0 0 3 0x14200 bored sosplice 28515 307892 51634 0 3 0x82 thrsleep syz-fuzzer 28515 223874 51634 0 3 0x4000082 nanosleep syz-fuzzer 28515 244798 51634 0 3 0x4000082 thrsleep syz-fuzzer 28515 236315 51634 0 3 0x4000082 thrsleep syz-fuzzer 28515 503919 51634 0 3 0x4000082 thrsleep syz-fuzzer 28515 20801 51634 0 3 0x4000082 nanosleep syz-fuzzer 28515 275819 51634 0 3 0x4000082 thrsleep syz-fuzzer 28515 229102 51634 0 3 0x4000082 thrsleep syz-fuzzer 28515 214897 51634 0 3 0x4000082 thrsleep syz-fuzzer 28515 325917 51634 0 3 0x4000082 kqread syz-fuzzer 51634 344490 24791 0 3 0x10008a pause ksh 24791 351908 49049 0 3 0x92 select sshd 20201 291159 1 0 3 0x100083 ttyin getty 49049 54013 1 0 3 0x80 select sshd 78813 194890 38155 73 3 0x100090 kqread syslogd 38155 31665 1 0 3 0x100082 netio syslogd 87539 17597 1 77 3 0x100090 poll dhclient 84650 339243 1 0 3 0x80 poll dhclient 6598 96444 0 0 3 0x14200 bored smr 36568 349466 0 0 3 0x14200 pgzero zerothread 76255 401099 0 0 3 0x14200 aiodoned aiodoned 34249 251281 0 0 3 0x14200 syncer update 76060 412436 0 0 3 0x14200 cleaner cleaner 62798 193475 0 0 7 0x14200 reaper 545 437978 0 0 3 0x14200 pgdaemon pagedaemon 49734 346344 0 0 3 0x14200 bored crynlk 91472 181894 0 0 3 0x14200 bored crypto 82162 443507 0 0 3 0x40014200 acpi0 acpi0 32804 28575 0 0 3 0x40014200 idle1 98010 351808 0 0 3 0x14200 bored softnet 39548 324724 0 0 3 0x14200 bored systqmp *13173 95273 0 0 7 0x14200 systq 37755 48138 0 0 3 0x40014200 bored softclock 54824 8305 0 0 3 0x40014200 idle0 1 212732 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 79691 (syz-executor.0) thread 0xffff800020a93d58 (197745) exclusive rrwlock inode r = 0 (0xfffffd80687f65e8) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:458 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80687f62b8) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:613 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 13173 (systq) thread 0xffff800020a18000 (95273) exclusive rrwlock inode r = 0 (0xfffffd807ecc43c8) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:613 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vn_closefile+0xc6 vn_close sys/kern/vfs_vnops.c:298 [inline] #5 vn_closefile+0xc6 sys/kern/vfs_vnops.c:614 #6 fdrop+0xc2 sys/kern/kern_descrip.c:1276 #7 closef+0x11c sys/kern/kern_descrip.c:1260 #8 unp_gc+0x172 sys/kern/uipc_usrreq.c:944 #9 taskq_thread+0x9c sys/kern/kern_task.c:369 #10 proc_trampoline+0x1c shared rwlock systq r = 0 (0xffffffff8251f550) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 taskq_thread+0x8f sys/kern/kern_task.c:368 #2 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8263a520) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:435 #3 sleep_finish+0x113 sys/kern/kern_synch.c:417 #4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:446 [inline] #4 sleep_finish_all+0x32 sys/kern/kern_synch.c:206 #5 msleep+0x20e sys/kern/kern_synch.c:273 #6 taskq_next_work+0xbe sys/kern/kern_task.c:323 #7 taskq_thread+0xe5 sys/kern/kern_task.c:366 #8 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9470 6332K 6332K 78643K 10597 0 pcb 13 8K 8K 78643K 13 0 rtable 105 3K 3K 78643K 567 0 ifaddr 39 10K 10K 78643K 104 0 counters 43 33K 33K 78643K 61 0 ioctlops 0 0K 2K 78643K 1339 0 iov 0 0K 32K 78643K 38 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1414 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 33K 78643K 1739 0 sigio 0 0K 0K 78643K 4 0 proc 48 50K 71K 78643K 811 0 subproc 34 2K 2K 78643K 187 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 69 0 in_multi 33 2K 2K 78643K 153 0 ether_multi 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 368 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 102 21K 22K 78643K 5539 0 UVM aobj 26 2K 2K 78643K 26 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 87 0 NDP 5 0K 0K 78643K 36 0 temp 102 3045K 3109K 78643K 6270 0 kqueue 3 4K 12K 78643K 51 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 25 0 19 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 151 0 149 1 0 1 1 0 8 0 rtentry 112 146 0 102 2 0 2 2 0 8 0 unpcb 120 744 0 734 1 0 1 1 0 8 0 syncache 264 14 0 14 4 3 1 1 0 8 1 tcpqe 32 25 0 25 2 1 1 1 0 8 1 tcpcb 544 5743 0 5738 3 1 2 2 0 8 1 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 45 0 45 1 1 0 1 0 8 0 inpcb 280 8792 0 8784 4 2 2 3 0 8 1 nd6 48 34 0 28 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 593 0 405 13 1 12 13 0 8 0 art_table 32 594 0 405 2 0 2 2 0 8 0 art_node 16 145 0 105 1 0 1 1 0 8 0 sysvmsgpl 40 61 0 26 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 24 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4275 0 2875 46 0 46 46 0 8 0 ffsino 272 4275 0 2875 94 0 94 94 0 8 0 nchpl 144 7471 0 5876 60 0 60 60 0 8 0 uvmvnodes 72 4471 0 0 82 0 82 82 0 8 0 vnodes 208 4471 0 0 236 0 236 236 0 8 0 namei 1024 18126 0 18125 1 0 1 1 0 8 0 percpumem 16 41 0 9 1 0 1 1 0 8 0 scxspl 192 19943 0 19943 11 8 3 7 0 8 3 plimitpl 152 100 0 91 1 0 1 1 0 8 0 sigapl 424 1900 0 1869 4 0 4 4 0 8 0 futexpl 56 36424 0 36424 1 0 1 1 0 8 1 knotepl 112 219 0 200 1 0 1 1 0 8 0 kqueuepl 144 155 0 153 1 0 1 1 0 8 0 pipelkpl 48 174 0 164 1 0 1 1 0 8 0 pipepl 120 348 0 329 2 1 1 2 0 8 0 fdescpl 496 1884 0 1869 3 0 3 3 0 8 1 filepl 152 16600 0 16500 7 2 5 7 0 8 1 lockfpl 104 2614 0 2613 1 0 1 1 0 8 0 lockfspl 48 995 0 994 1 0 1 1 0 8 0 sessionpl 112 26 0 16 1 0 1 1 0 8 0 pgrppl 48 86 0 76 1 0 1 1 0 8 0 ucredpl 96 568 0 559 1 0 1 1 0 8 0 zombiepl 144 1869 0 1868 1 0 1 1 0 8 0 processpl 984 1900 0 1868 5 0 5 5 0 8 0 procpl 624 4474 0 4433 4 0 4 4 0 8 0 sosppl 128 2254 0 2254 3 2 1 1 0 8 1 sockpl 400 9713 0 9693 7 3 4 5 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 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 10 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 148 0 0 18 0 18 18 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 272 0 0 17 0 17 17 0 8 0 bufpl 280 7125 0 859 448 0 448 448 0 8 0 anonpl 16 167807 0 159989 64 21 43 49 0 124 8 amapchunkpl 152 9328 0 9220 7 1 6 7 0 158 1 amappl16 192 7429 0 7016 56 33 23 33 0 8 2 amappl15 184 62 0 61 1 0 1 1 0 8 0 amappl14 176 3 0 2 2 1 1 1 0 8 0 amappl13 168 138 0 134 1 0 1 1 0 8 0 amappl12 160 11 0 11 2 2 0 1 0 8 0 amappl11 152 788 0 775 1 0 1 1 0 8 0 amappl10 144 715 0 708 1 0 1 1 0 8 0 amappl9 136 398 0 394 1 0 1 1 0 8 0 amappl8 128 479 0 456 1 0 1 1 0 8 0 amappl7 120 866 0 850 1 0 1 1 0 8 0 amappl6 112 731 0 721 1 0 1 1 0 8 0 amappl5 104 1668 0 1657 1 0 1 1 0 8 0 amappl4 96 692 0 661 1 0 1 1 0 8 0 amappl3 88 135 0 130 1 0 1 1 0 8 0 amappl2 80 13616 0 13550 3 1 2 3 0 8 0 amappl1 72 55542 0 55101 25 16 9 20 0 8 0 amappl 80 4835 0 4794 1 0 1 1 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 25 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1884 0 1868 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1884 0 1868 1 0 1 1 0 8 0 vmmpekpl 168 15245 0 15219 2 0 2 2 0 8 0 vmmpepl 168 241542 0 239929 107 26 81 87 0 357 10 vmsppl 368 1883 0 1868 2 0 2 2 0 8 0 pdppl 4096 3776 0 3736 6 0 6 6 0 8 0 pvpl 32 478139 0 467142 160 37 123 129 0 265 26 pmappl 232 1883 0 1868 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 178 0 7 5 0 5 5 0 8 0