Warning: Permanently added '10.128.0.120' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program login: panic: kernel diagnostic assertion "timo || _kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_synch.c", line 121 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 388950 39601 0 0 0x4000000 0 syz-executor4793 *445333 85914 0 0 0x4000000 1 syz-executor4793 db_enter() at db_enter+0x18 panic() at panic+0x15c __assert(ffffffff81fb5b5c,ffffffff81fd515d,79,ffffffff81fc5830) at __assert+0x2e tsleep(fffffd806d2f5b40,8,ffffffff81fb40b2,0) at tsleep+0x3fb vn_seek(fffffd807b0024c0,ffff800020bb5808,0,ffff800020aff8b8) at vn_seek+0xa0 sys_lseek(ffff800020aff8b8,ffff800020bb5878,ffff800020bb58e0) at sys_lseek+0x6f syscall(ffff800020bb5950) at syscall+0x552 Xsyscall(6,0,945385670c8,0,945385670a8,945385670a0) at Xsyscall+0x128 end of kernel end trace frame: 0x9483259cce0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel diagnostic assertion "timo || _kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_synch.c", line 121 ddb{1}> trace db_enter() at db_enter+0x18 panic() at panic+0x15c __assert(ffffffff81fb5b5c,ffffffff81fd515d,79,ffffffff81fc5830) at __assert+0x2e tsleep(fffffd806d2f5b40,8,ffffffff81fb40b2,0) at tsleep+0x3fb vn_seek(fffffd807b0024c0,ffff800020bb5808,0,ffff800020aff8b8) at vn_seek+0xa0 sys_lseek(ffff800020aff8b8,ffff800020bb5878,ffff800020bb58e0) at sys_lseek+0x6f syscall(ffff800020bb5950) at syscall+0x552 Xsyscall(6,0,945385670c8,0,945385670a8,945385670a0) at Xsyscall+0x128 end of kernel end trace frame: 0x9483259cce0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bb5590 rbx 0xffff800020bb5640 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81b1c663 kprintf+0x173 r9 0x1 r10 0x4da86d535fba2a30 r11 0x821ce3a1a12ad9d8 r12 0x3000000008 r13 0xffff800020bb55a0 r14 0x100 r15 0x1 rip 0xffffffff811a7028 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bb5580 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor4793) pid=445333 stat=onproc flags process=0 proc=4000000 pri=52, usrpri=52, nice=20 forw=0xffffffffffffffff, list=0xffff800020afe008,0xffff800020afe508 process=0xffff800020b2a710 user=0xffff800020bb0000, vmspace=0xfffffd806e8f1738 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39601 204572 97462 0 2 0 syz-executor4793 39601 325977 97462 0 3 0x4000080 fsleep syz-executor4793 39601 388950 97462 0 7 0x4000000 syz-executor4793 85914 517016 1651 0 2 0 syz-executor4793 *85914 445333 1651 0 7 0x4000000 syz-executor4793 97462 32853 94562 0 3 0x80 nanosleep syz-executor4793 1651 153458 94562 0 3 0x80 nanosleep syz-executor4793 94562 493971 31450 0 3 0x82 nanosleep syz-executor4793 31450 33961 13540 0 3 0x10008a pause ksh 13540 372110 19139 0 3 0x92 select sshd 58890 442653 1 0 3 0x100083 ttyin getty 19139 226125 1 0 3 0x80 select sshd 85415 172628 15082 73 3 0x100090 kqread syslogd 15082 393815 1 0 3 0x100082 netio syslogd 84541 392921 1 77 3 0x100090 poll dhclient 14733 272732 1 0 3 0x80 poll dhclient 16976 486309 0 0 2 0x14200 zerothread 79982 446158 0 0 3 0x14200 aiodoned aiodoned 4777 348358 0 0 3 0x14200 syncer update 27634 260760 0 0 3 0x14200 cleaner cleaner 46161 60181 0 0 3 0x14200 reaper reaper 10408 215339 0 0 3 0x14200 pgdaemon pagedaemon 65729 320803 0 0 3 0x14200 bored crynlk 26764 505248 0 0 3 0x14200 bored crypto 55960 272271 0 0 3 0x40014200 acpi0 acpi0 4652 25522 0 0 3 0x40014200 idle1 97061 364490 0 0 3 0x14200 bored softnet 61173 183324 0 0 3 0x14200 bored systqmp 7216 452373 0 0 3 0x14200 bored systq 18286 289152 0 0 3 0x40014200 bored softclock 35173 355206 0 0 3 0x40014200 idle0 94142 143501 0 0 3 0x14200 bored smr 1 266328 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 39601 (syz-executor4793) thread 0xffff800020afe280 (388950) exclusive rwlock fdlock r = 0 (0xfffffd807f7c5058) #0 witness_lock+0x52e #1 ptmioctl+0xe7 #2 VOP_IOCTL+0x88 #3 vn_ioctl+0xb7 #4 sys_ioctl+0x5b8 #5 syscall+0x552 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9448 6316K 6317K 78643K 10535 0 0 pcb 13 8K 8K 78643K 13 0 0 rtable 61 2K 2K 78643K 115 0 0 ifaddr 21 7K 7K 78643K 21 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 13 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1180 74K 74K 78643K 1618 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 3 4K 5K 78643K 610 0 0 proc 40 38K 46K 78643K 257 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 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 152 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 64 3K 3K 78643K 1489 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 3 0K 0K 78643K 3 0 0 temp 30 2731K 2795K 78643K 2120 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 2 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 15 0 13 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 27 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 22 0 16 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2029 0 650 45 0 45 45 0 8 0 ffsino 272 2029 0 650 92 0 92 92 0 8 0 nchpl 144 2419 0 880 58 0 58 58 0 8 0 uvmvnodes 72 2038 0 0 38 0 38 38 0 8 0 vnodes 200 2038 0 0 108 0 108 108 0 8 0 namei 1024 7508 0 7508 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 5107 0 5105 9 8 1 6 0 8 0 plimitpl 152 13 0 8 1 0 1 1 0 8 0 sigapl 432 381 0 367 2 0 2 2 0 8 0 futexpl 56 1501 0 1500 1 0 1 1 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 118 0 111 3 2 1 1 0 8 0 fdescpl 488 382 0 367 2 0 2 2 0 8 0 filepl 152 3469 0 3417 3 0 3 3 0 8 1 lockfpl 104 6 0 6 1 1 0 1 0 8 0 lockfspl 48 3 0 3 1 1 0 1 0 8 0 sessionpl 112 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 2476 0 2469 1 0 1 1 0 8 0 zombiepl 144 367 0 367 3 2 1 1 0 8 1 processpl 896 397 0 367 4 0 4 4 0 8 0 procpl 632 974 0 941 4 0 4 4 0 8 1 sockpl 384 64 0 48 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 64 0 0 8 0 8 8 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 92 0 0 5 0 5 5 0 8 0 bufpl 256 2288 0 262 127 0 127 127 0 8 0 anonpl 16 30591 0 29323 8 2 6 6 0 125 0 amapchunkpl 152 1835 0 1790 3 0 3 3 0 158 1 amappl16 192 539 0 523 1 0 1 1 0 8 0 amappl14 176 36 0 32 1 0 1 1 0 8 0 amappl12 160 9 0 9 1 1 0 1 0 8 0 amappl11 152 42 0 31 1 0 1 1 0 8 0 amappl10 144 46 0 46 2 1 1 1 0 8 1 amappl9 136 400 0 399 1 0 1 1 0 8 0 amappl8 128 91 0 83 1 0 1 1 0 8 0 amappl7 120 14 0 13 1 0 1 1 0 8 0 amappl6 112 40 0 36 1 0 1 1 0 8 0 amappl5 104 119 0 110 1 0 1 1 0 8 0 amappl4 96 606 0 581 1 0 1 1 0 8 0 amappl3 88 350 0 336 1 0 1 1 0 8 0 amappl2 80 2355 0 2285 4 2 2 2 0 8 0 amappl1 72 18574 0 18147 14 4 10 14 0 8 0 amappl 80 1146 0 1120 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 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 382 0 367 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 382 0 367 1 0 1 1 0 8 0 vmmpekpl 168 6873 0 6855 1 0 1 1 0 8 0 vmmpepl 168 42685 0 41742 56 13 43 44 0 357 2 vmsppl 368 381 0 367 2 0 2 2 0 8 0 pdppl 4096 772 0 734 5 0 5 5 0 8 0 pvpl 32 98033 0 95021 34 8 26 26 0 265 1 pmappl 232 381 0 367 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 255 0 3 8 0 8 8 0 8 0