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Günther Noack 878b30c0bc fspread: fix buffer overflow 
Without this fix, fspread is trusting the server to return as much
data as requested, or less. If a server responds with more data
though, fspread writes beyond the bounds of the buffer to fill, which
is passed in by the caller. It depends on the caller of fspread()
where that buffer is, so there are various possible attack vectors.

In the Plan9 kernel, I found this implemented in devmnt.c, where
overly large responses are truncated to the size requested before
copying, so I assume that this strategy works here too.

This also affects fsread() and fsreadn(), which are based on
fspread().
2021-04-05 05:19:49 -04:00
acid merge 2012-03-05 16:36:31 -05:00
bin mount: find kext with MacFUSE >=4 and macOS >=11 2021-01-31 20:52:49 -05:00
dict all: remove .cvsignore files 2017-09-14 17:25:17 +02:00
dist all: update for new MIT license 2021-03-23 20:59:23 -04:00
face
font all: update for new MIT license 2021-03-23 20:59:23 -04:00
include libthread: simplify 2020-12-30 07:53:28 -05:00
lib wintext: add to moveplan9.files (#470) 2020-12-30 14:36:09 -05:00
lp all: remove .cvsignore files 2017-09-14 17:25:17 +02:00
mac 9term.app: respect user-set shell instead of forcing bash 2020-05-05 09:30:39 -04:00
mail all: remove .cvsignore files 2017-09-14 17:25:17 +02:00
man man9: rename IM to MR 2021-01-29 19:33:10 -05:00
ndb ndb/local: remove rsc-specific entries (oops) 2008-06-04 13:28:05 -04:00
news
plumb plumb/basic: avoid wrap around in file:1:2 (#158) 2018-11-13 23:59:04 -05:00
postscript all: remove .cvsignore files 2017-09-14 17:25:17 +02:00
proto
sky all: remove .cvsignore files 2017-09-14 17:25:17 +02:00
src fspread: fix buffer overflow 2021-04-05 05:19:49 -04:00
tmac tmac: rename IM (italic manual) to MR (manual reference) 2020-08-15 20:09:40 -04:00
troff troff: import HB, HI and HX fonts from Plan 9 2017-06-15 19:09:58 +00:00
unix all: update for new MIT license 2021-03-23 20:59:23 -04:00
.gitignore .gitignore: add LOCAL.config and lib/fortunes.index 2020-12-30 08:46:54 -05:00
.travis.yml devdraw: cocoa metal screen updates (#215) 2019-05-17 23:17:44 -04:00
CHANGES CHANGES: add pointer to web version 2008-05-10 13:38:21 -04:00
configure For annoying people like Uriel. 2005-11-25 13:18:11 +00:00
CONTRIBUTING.md codereview: delete, now using GitHub pull requests 2017-09-01 13:25:20 -04:00
CONTRIBUTORS venti: fix venti graph on 64-bit 2017-07-23 11:11:56 +00:00
INSTALL all: remove $OBJTYPE from build 2020-12-30 07:53:28 -05:00
install.txt Fix broken references to plan9.bell-labs.com/plan9 2020-02-22 20:09:40 -05:00
LICENSE all: update for new MIT license 2021-03-23 20:59:23 -04:00
Makefile For annoying people like Uriel. 2005-11-25 13:18:11 +00:00
rcmain rcmain: use new $termprog variable 2013-08-13 12:46:38 -04:00
README.md TODO: remove, not updated in 15 years 2020-01-13 17:04:06 -05:00

README.md

This is a port of many Plan 9 libraries and programs to Unix.

Installation

To install, run ./INSTALL. It builds mk and then uses mk to run the rest of the installation.

For more details, see install(1), at install.txt in this directory and at https://9fans.github.io/plan9port/man/man1/install.html.

Documentation

See https://9fans.github.io/plan9port/man/ for more documentation. (Documentation is also in this tree, but you need to run a successful install first. After that, "9 man 1 intro".)

Intro(1) contains a list of man pages that describe new features or differences from Plan 9.

Helping out

If you'd like to help out, great!

If you port this code to other architectures, please share your changes so others can benefit.

Git

You can use Git to keep your local copy up-to-date as we make changes and fix bugs. See the git(1) man page here ("9 man git") for details on using Git.

Status

Build Status Coverity Scan Build Status

Contact