| TITLE: witness: userret: write |
| |
| witness: userret: returning with the following locks held: |
| exclusive rrwlock inode r = 0 (0xfffffd8068b43e68) |
| #0 witness_lock+0x52e |
| #1 rw_enter+0x46d |
| #2 rrw_enter+0x4f |
| #3 VOP_LOCK+0x4b |
| #4 vn_write+0x169 |
| #5 dofilewritev+0x1ac |
| #6 sys_write+0x83 |
| #7 syscall+0x552 |
| #8 Xsyscall+0x128 |
| panic: witness_warn |
| Stopped at db_enter+0x18: addq $0x8,%rsp |
| TID PID UID PRFLAGS PFLAGS CPU COMMAND |
| *127727 4787 32767 0x2010 0x4080000 1 syz-executor.1 |
| 397608 24914 73 0x100010 0 0 syslogd |
| db_enter() at db_enter+0x18 |
| panic() at panic+0x15c |
| witness_warn(2,0,ffffffff82206990) at witness_warn+0x69e |
| userret(ffff800020acec78) at userret+0x36a |
| syscall(ffff800024f63420) at syscall+0x44a |
| Xsyscall(6,5,c,0,3,c0eb2625010) at Xsyscall+0x128 |
| end of kernel |
| end trace frame: 0xc1166dc17a0, count: 9 |
| 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 |
| witness_warn |
| ddb{1}> trace |
| db_enter() at db_enter+0x18 |
| panic() at panic+0x15c |
| witness_warn(2,0,ffffffff82206990) at witness_warn+0x69e |
| userret(ffff800020acec78) at userret+0x36a |
| syscall(ffff800024f63420) at syscall+0x44a |
| Xsyscall(6,5,c,0,3,c0eb2625010) at Xsyscall+0x128 |
| end of kernel |
| end trace frame: 0xc1166dc17a0, count: -6 |
| ddb{1}> show registers |
| rdi 0 |
| rsi 0x3ffff acpi_pdirpa+0x2be67 |
| rbp 0xffff800024f63160 |
| rbx 0xffff800024f63210 |
| rdx 0x40000 acpi_pdirpa+0x2be68 |
| rcx 0xffff800021f52000 |
| rax 0xffff800000a6ebc0 |
| r8 0xffffffff81e141c3 kprintf+0x173 |
| r9 0x1 |
| r10 0x25 |
| r11 0xb1f19339cedc7a5c |
| r12 0x3000000008 |
| r13 0xffff800024f63170 |
| r14 0x100 |
| r15 0x1 |
| rip 0xffffffff81e136b8 db_enter+0x18 |
| cs 0x8 |
| rflags 0x246 |
| rsp 0xffff800024f63150 |
| ss 0x10 |
| db_enter+0x18: addq $0x8,%rsp |
| ddb{1}> show proc |
| PROC (syz-executor.1) pid=127727 stat=onproc |
| flags process=2010<SUGID,SINGLEUNWIND> proc=4080000<SUSPSINGLE,THREAD> |
| pri=32, usrpri=86, nice=20 |
| forw=0xffffffffffffffff, list=0xffff800020ace020,0xffff800020acf8e0 |
| process=0xffff800020adc000 user=0xffff800024f5e000, vmspace=0xfffffd807f00ca10 |
| estcpu=36, cpticks=5, pctcpu=0.0 |
| user=0, sys=5, intr=0 |
| ddb{1}> ps |
| PID TID PPID UID S FLAGS WAIT COMMAND |
| 50146 384011 93903 32767 2 0x10 syz-executor.0 |
| 50146 458774 93903 32767 2 0x4000090 syz-executor.0 |
| 50146 443490 93903 32767 3 0x4000010 inode syz-executor.0 |
| 4787 150491 90341 32767 4 0x82010 syz-executor.1 |
| * 4787 127727 90341 32767 7 0x4082010 syz-executor.1 |
| 4787 259046 90341 32767 2 0x4082010 syz-executor.1 |
| 4787 221006 90341 32767 3 0x4082010 inode syz-executor.1 |
| 4787 70544 90341 32767 3 0x4002010 suspend syz-executor.1 |
| 93903 390199 66612 32767 3 0x90 nanosleep syz-executor.0 |
| 66612 514755 45878 0 3 0x82 wait syz-executor.0 |
| 90341 117146 92790 32767 2 0x490 syz-executor.1 |
| 92790 129794 45878 0 3 0x82 wait syz-executor.1 |
| 16665 437832 0 0 3 0x14200 bored sosplice |
| 45878 439952 24034 0 3 0x82 kqread syz-fuzzer |
| 45878 302097 24034 0 2 0x4000482 syz-fuzzer |
| 45878 447485 24034 0 3 0x4000082 thrsleep syz-fuzzer |
| 45878 401500 24034 0 3 0x4000082 thrsleep syz-fuzzer |
| 45878 429086 24034 0 3 0x4000082 thrsleep syz-fuzzer |
| 45878 441558 24034 0 3 0x4000082 thrsleep syz-fuzzer |
| 45878 32330 24034 0 3 0x4000082 thrsleep syz-fuzzer |
| 45878 297379 24034 0 3 0x4000082 thrsleep syz-fuzzer |
| 45878 240767 24034 0 3 0x4000082 thrsleep syz-fuzzer |
| 45878 291298 24034 0 3 0x4000082 thrsleep syz-fuzzer |
| 24034 483088 21342 0 3 0x10008a pause ksh |
| 21342 45907 10808 0 3 0x92 select sshd |
| 38957 371602 1 0 3 0x100083 ttyin getty |
| 10808 298188 1 0 3 0x80 select sshd |
| 24914 397608 1007 73 7 0x100010 syslogd |
| 1007 452199 1 0 3 0x100082 netio syslogd |
| 24790 439683 1 77 3 0x100090 poll dhclient |
| 54973 346754 1 0 3 0x80 poll dhclient |
| 69706 108630 0 0 2 0x14200 zerothread |
| 64136 271591 0 0 3 0x14200 aiodoned aiodoned |
| 2028 296064 0 0 3 0x14200 syncer update |
| 86492 223421 0 0 3 0x14200 cleaner cleaner |
| 35057 440015 0 0 3 0x14200 reaper reaper |
| 56493 127515 0 0 3 0x14200 pgdaemon pagedaemon |
| 38968 45139 0 0 3 0x14200 bored crynlk |
| 79592 227575 0 0 3 0x14200 bored crypto |
| 32698 41884 0 0 3 0x40014200 acpi0 acpi0 |
| 14078 480701 0 0 3 0x40014200 idle1 |
| 19658 28196 0 0 3 0x14200 bored softnet |
| 32857 444808 0 0 3 0x14200 bored systqmp |
| 45345 69336 0 0 3 0x14200 bored systq |
| 13516 165843 0 0 3 0x40014200 bored softclock |
| 85557 97343 0 0 3 0x40014200 idle0 |
| 55872 214173 0 0 3 0x14200 bored smr |
| 1 266521 0 0 3 0x82 wait init |
| 0 0 -1 0 3 0x10200 scheduler swapper |
| ddb{1}> show all locks |
| Process 50146 (syz-executor.0) thread 0xffff800020ac18c0 (384011) |
| exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8265ab40) |
| #0 witness_lock+0x52e |
| #1 intr_handler+0x5e |
| #2 Xintr_ioapic_edge17_untramp+0x19f |
| Process 50146 (syz-executor.0) thread 0xffff800020acea00 (443490) |
| exclusive rrwlock inode r = 0 (0xfffffd807ec55b38) |
| #0 witness_lock+0x52e |
| #1 rw_enter+0x46d |
| #2 rrw_enter+0x4f |
| #3 VOP_LOCK+0x4b |
| #4 vn_lock+0x6e |
| #5 vget+0x1c3 |
| #6 cache_lookup+0x2cf |
| #7 ufs_lookup+0x1ad |
| #8 VOP_LOOKUP+0x5b |
| #9 vfs_lookup+0x7a5 |
| #10 namei+0x61c |
| #11 ptmioctl+0x3af |
| #12 VOP_IOCTL+0x88 |
| #13 vn_ioctl+0xb7 |
| #14 sys_ioctl+0x5b8 |
| #15 syscall+0x552 |
| #16 Xsyscall+0x128 |
| exclusive rwlock fdlock r = 0 (0xfffffd80686f7bd8) |
| #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 |
| Process 4787 (syz-executor.1) thread 0xffff800020acec78 (127727) |
| exclusive rrwlock inode r = 0 (0xfffffd8068b43e68) |
| #0 witness_lock+0x52e |
| #1 rw_enter+0x46d |
| #2 rrw_enter+0x4f |
| #3 VOP_LOCK+0x4b |
| #4 vn_write+0x169 |
| #5 dofilewritev+0x1ac |
| #6 sys_write+0x83 |
| #7 syscall+0x552 |
| #8 Xsyscall+0x128 |
| Process 24914 (syslogd) thread 0xffff800020ac0ee0 (397608) |
| exclusive rrwlock inode r = 0 (0xfffffd806eb40098) |
| #0 witness_lock+0x52e |
| #1 rw_enter+0x46d |
| #2 rrw_enter+0x4f |
| #3 VOP_LOCK+0x4b |
| #4 vn_lock+0x6e |
| #5 sys_fsync+0x114 |
| #6 syscall+0x552 |
| #7 Xsyscall+0x128 |
| ddb{1}> show malloc |
| Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim |
| devbuf 9462 6321K 6321K 78643K 11404 0 0 |
| pcb 13 8K 8K 78643K 13 0 0 |
| rtable 105 3K 3K 78643K 7900 0 0 |
| ifaddr 36 14K 15K 78643K 1082 0 0 |
| counters 39 33K 33K 78643K 39 0 0 |
| ioctlops 0 0K 2K 78643K 436 0 0 |
| iov 0 0K 36K 78643K 770 0 0 |
| mount 1 1K 1K 78643K 1 0 0 |
| vnodes 1215 76K 76K 78643K 5637 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 102 0 0 |
| VM map 2 1K 1K 78643K 2 0 0 |
| sem 12 0K 0K 78643K 975 0 0 |
| dirhash 12 2K 2K 78643K 12 0 0 |
| ACPI 1808 196K 290K 78643K 12765 0 0 |
| file desc 8 25K 33K 78643K 9799 0 0 |
| sigio 0 0K 0K 78643K 119 0 0 |
| proc 41 38K 70K 78643K 8124 0 0 |
| subproc 34 2K 2K 78643K 2941 0 0 |
| NFS srvsock 1 0K 0K 78643K 1 0 0 |
| NFS daemon 1 16K 16K 78643K 1 0 0 |
| ip_moptions 0 0K 0K 78643K 1182 0 0 |
| in_multi 33 2K 2K 78643K 2199 0 0 |
| ether_multi 1 0K 0K 78643K 52 0 0 |
| ISOFS mount 1 32K 32K 78643K 1 0 0 |
| MSDOSFS mount 1 16K 16K 78643K 1 0 0 |
| ttys 60 265K 265K 78643K 60 0 0 |
| exec 0 0K 1K 78643K 2998 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 112 22K 32K 78643K 33952 0 0 |
| UVM aobj 130 4K 4K 78643K 151 0 0 |
| memdesc 1 4K 4K 78643K 1 0 0 |
| crypto data 1 1K 1K 78643K 1 0 0 |
| ip6_options 0 0K 0K 78643K 509 0 0 |
| NDP 5 0K 0K 78643K 522 0 0 |
| temp 121 3546K 3638K 78643K 43256 0 0 |
| kqueue 0 0K 0K 78643K 132 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 64 351 0 345 1 0 1 1 0 8 0 |
| plcache 128 20 0 0 1 0 1 1 0 8 0 |
| rtpcb 80 819 0 817 1 0 1 1 0 8 0 |
| rtentry 112 1929 0 1885 2 0 2 2 0 8 0 |
| unpcb 120 3870 0 3860 1 0 1 1 0 8 0 |
| syncache 264 4 0 4 1 1 0 1 0 8 0 |
| tcpqe 32 4428 0 4428 2 2 0 2 0 8 0 |
| tcpcb 544 2053 0 2049 1 0 1 1 0 8 0 |
| ipq 40 11 0 11 7 7 0 1 0 8 0 |
| ipqe 40 31 0 31 7 7 0 1 0 8 0 |
| inpcb 280 5055 0 5046 13 12 1 2 0 8 0 |
| nd6 48 519 0 513 1 0 1 1 0 8 0 |
| art_heap8 4096 1 0 0 1 0 1 1 0 8 0 |
| art_heap4 256 7883 0 7688 25 12 13 13 0 8 0 |
| art_table 32 7884 0 7688 2 0 2 2 0 8 0 |
| art_node 16 1928 0 1888 1 0 1 1 0 8 0 |
| sysvmsgpl 40 26 0 18 2 1 1 1 0 8 0 |
| semapl 112 973 0 963 1 0 1 1 0 8 0 |
| shmpl 112 149 0 21 5 1 4 4 0 8 0 |
| dirhash 1024 17 0 0 3 0 3 3 0 8 0 |
| dino1pl 128 11566 0 10119 48 1 47 47 0 8 0 |
| ffsino 272 11566 0 10119 97 0 97 97 0 8 0 |
| nchpl 144 23182 0 21554 61 0 61 61 0 8 0 |
| uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 |
| vnodes 200 5926 0 0 312 0 312 312 0 8 0 |
| namei 1024 97652 0 97651 2 1 1 1 0 8 0 |
| percpumem 16 30 0 0 1 0 1 1 0 8 0 |
| scxspl 192 68137 0 68137 35 34 1 7 0 8 1 |
| plimitpl 152 1633 0 1624 1 0 1 1 0 8 0 |
| sigapl 432 9457 0 9441 10 8 2 3 0 8 0 |
| futexpl 56 84996 0 84996 1 0 1 1 0 8 1 |
| knotepl 112 5413 0 5394 1 0 1 1 0 8 0 |
| kqueuepl 104 2347 0 2345 1 0 1 1 0 8 0 |
| pipepl 112 6084 0 6065 9 8 1 2 0 8 0 |
| fdescpl 488 9458 0 9441 3 0 3 3 0 8 0 |
| filepl 152 57889 0 57777 33 28 5 7 0 8 0 |
| lockfpl 104 1953 0 1953 24 23 1 1 0 8 1 |
| lockfspl 48 620 0 620 24 23 1 1 0 8 1 |
| sessionpl 112 188 0 178 1 0 1 1 0 8 0 |
| pgrppl 48 290 0 280 1 0 1 1 0 8 0 |
| ucredpl 96 16616 0 16607 1 0 1 1 0 8 0 |
| zombiepl 144 9441 0 9441 2 1 1 1 0 8 1 |
| processpl 896 9474 0 9441 4 0 4 4 0 8 0 |
| procpl 632 25806 0 25758 26 21 5 5 0 8 1 |
| srpgc 64 342 0 342 31 31 0 1 0 8 0 |
| sosppl 128 186 0 186 43 42 1 1 0 8 1 |
| sockpl 384 9910 0 9891 20 17 3 4 0 8 1 |
| mcl64k 65536 26 0 0 4 1 3 3 0 8 0 |
| mcl16k 16384 16 0 0 2 0 2 2 0 8 0 |
| mcl12k 12288 49 0 0 2 0 2 2 0 8 0 |
| mcl9k 9216 33 0 0 3 1 2 2 0 8 0 |
| mcl8k 8192 37 0 0 5 2 3 3 0 8 0 |
| mcl4k 4096 18 0 0 3 0 3 3 0 8 0 |
| mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 |
| mcl2k 2048 250 0 0 27 12 15 27 0 8 0 |
| mtagpl 80 1 0 0 1 0 1 1 0 8 0 |
| mbufpl 256 819 0 0 16 2 14 16 0 8 0 |
| bufpl 256 24884 0 17870 439 0 439 439 0 8 0 |
| anonpl 16 1306709 0 1299708 202 158 44 48 0 124 1 |
| amapchunkpl 152 79740 0 79646 146 137 9 18 0 158 5 |
| amappl16 192 58133 0 57737 325 296 29 34 0 8 8 |
| amappl15 184 1571 0 1571 17 17 0 1 0 8 0 |
| amappl14 176 2417 0 2413 1 0 1 1 0 8 0 |
| amappl13 168 2045 0 2042 18 17 1 1 0 8 0 |
| amappl12 160 652 0 650 6 5 1 1 0 8 0 |
| amappl11 152 1383 0 1366 1 0 1 1 0 8 0 |
| amappl10 144 1106 0 1105 1 0 1 1 0 8 0 |
| amappl9 136 3928 0 3925 1 0 1 1 0 8 0 |
| amappl8 128 3117 0 3075 3 1 2 2 0 8 0 |
| amappl7 120 1431 0 1421 1 0 1 1 0 8 0 |
| amappl6 112 969 0 958 1 0 1 1 0 8 0 |
| amappl5 104 1951 0 1938 1 0 1 1 0 8 0 |
| amappl4 96 9732 0 9701 1 0 1 1 0 8 0 |
| amappl3 88 2597 0 2587 1 0 1 1 0 8 0 |
| amappl2 80 62851 0 62775 3 1 2 3 0 8 0 |
| amappl1 72 262376 0 261899 23 13 10 19 0 8 0 |
| amappl 80 28900 0 28860 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 64 150 0 21 3 0 3 3 0 8 0 |
| uaddrrnd 24 9458 0 9441 1 0 1 1 0 8 0 |
| uaddrbest 32 2 0 0 1 0 1 1 0 8 0 |
| uaddr 24 9458 0 9441 1 0 1 1 0 8 0 |
| vmmpekpl 168 80680 0 80647 2 0 2 2 0 8 0 |
| vmmpepl 168 1232948 0 1231203 332 246 86 95 0 357 10 |
| vmsppl 368 9457 0 9441 2 0 2 2 0 8 0 |
| pdppl 4096 18923 0 18882 6 0 6 6 0 8 0 |
| pvpl 32 3134188 0 3123771 567 449 118 131 0 265 18 |
| pmappl 232 9457 0 9441 18 17 1 2 0 8 0 |
| extentpl 40 41 0 26 1 0 1 1 0 8 0 |
| phpool 112 635 0 32 18 0 18 18 0 8 0 |
