Date: Sat, 5 Feb 2000 06:20:02 -0800 (PST) From: Jeroen Ruigrok/Asmodai <asmodai@wxs.nl> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/1533: Machine can be panicked by a userland program. Message-ID: <200002051420.GAA40370@freefall.freebsd.org>
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The following reply was made to PR kern/1533; it has been noted by GNATS.
From: Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>
To: FreeBSD Gnats <freebsd-gnats-submit@freebsd.org>
Cc:
Subject: Re: kern/1533: Machine can be panicked by a userland program.
Date: Sat, 5 Feb 2000 15:18:01 +0100
[resend due to hub/builder mail problems]
This PR which details an old mmap() seems to be fixed in CURRENT at
least, and I suspect Matthew Dillon is guilty for that. =)
My results:
[asmodai@celestial] (17) $ find /usr/src -type f -print | ./a.out
warning: this program uses gets(), which is unsafe.
[512] .. [1024] .. [1536] .. [2048] .. [2560] .. [3072] .. [3584] ..
[4096] .. [4608] .. [5120] .. [5632] .. [6144] .. [6656] .. [7168] ..
[7680] .. [8192] .. [8704] .. [9216] .. [9728] .. [10240] .. [10752] ..
[11264] .. [11776] .. [12288] .. [12800] .. [13312] .. [13824] ..
[14336] .. [14848] .. [15360] .. [15872] .. [16384] .. [16896] ..
[17408] .. [17920] .. [18432] .. [18944] .. [19456] .. [19968] ..
[20480] .. [20992] .. [21504] .. [22016] .. [22528] .. [23040] ..
[23552] .. [24064] .. [24576] .. [25088] .. [25600] .. [26112] ..
[26624] .. [27136] .. [27648] .. [28160] .. [28672] .. [29184] ..
[29696] .. [30208] .. [30720] .. [31232] .. [31744] .. [32256] ..
[32768] .. [33280] .. [33792] .. [34304] .. [34816] .. [35328] ..
[35840] .. [36352] .. [36864] .. [37376] .. [37888] .. [38400] ..
[38912] .. mmap: Cannot allocate memory
mmap: Cannot allocate memory
mmap: Cannot allocate memory
mmap: Cannot allocate memory
mmap: Cannot allocate memory
mmap: Cannot allocate memory
mmap: Cannot allocate memory
((ad inifitum I guess))
One funny thing is that systat -vmstat reported freevnodes of between
the 20 and 30 every time, but when mmap was spewing the Cannot allocate
memory warnings it suddenly rose:
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 3120 664 5104 680 45400 count
All 81372 1288 2689648 1472 pages
Interrupts
Proc:r p d s w Csw Trp Sys Int Sof Flt cow 100 total
4 3 14 100 1 1 41624 wire ata-pci0 i
5944 act mux irq18
0.3%Sys 0.0%Intr 0.0%User 0.0%Nice 99.7%Idl 33788 inact fdc0 irq6
| | | | | | | | | | 16 cache atkbd0 irq
45384 free sio0 irq4
daefr sio1 irq3
Namei Name-cache Dir-cache prcfr 100 clk irq0
Calls hits % hits % react
pdwake
zfod pdpgs
Disks ad0 ad4 fd0 md0 ofod intrn
KB/t 0.00 0.00 0.00 0.00 %slo-z 10939 buf
tps 0 0 0 0 tfree 5 dirtybuf
MB/s 0.00 0.00 0.00 0.00 8966 desiredvnodes
% busy 0 0 0 0 43102 numvnodes
35659 freevnodes
^^^^^
Poul-Henning and Matthew, I'd love to hear your conclusions on this so that I
can either close this PR with a ``fixed in CURRENT/4.0'' notice or get you guys
to wonder about the results I pasted above. =)
--
Jeroen Ruigrok vd W/Asmodai asmodai@[wxs.nl|bart.nl|freebsd.org]
Documentation nutter/B-rated Coder BSD: Technical excellence at its best
The BSD Programmer's Documentation Project <http://home.wxs.nl/~asmodai>;
Cogito, ergo sum...
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