user/sven/linux.git/Documentation, branch v3.2.78

pipe: limit the per-user amount of pages allocated in pipes

2016-02-27T14:28:49Z

commit 759c01142a5d0f364a462346168a56de28a80f52 upstream. On no-so-small systems, it is possible for a single process to cause an OOM condition by filling large pipes with data that are never read. A typical process filling 4000 pipes with 1 MB of data will use 4 GB of memory. On small systems it may be tricky to set the pipe max size to prevent this from happening. This patch makes it possible to enforce a per-user soft limit above which new pipes will be limited to a single page, effectively limiting them to 4 kB each, as well as a hard limit above which no new pipes may be created for this user. This has the effect of protecting the system against memory abuse without hurting other users, and still allowing pipes to work correctly though with less data at once. The limit are controlled by two new sysctls : pipe-user-pages-soft, and pipe-user-pages-hard. Both may be disabled by setting them to zero. The default soft limit allows the default number of FDs per process (1024) to create pipes of the default size (64kB), thus reaching a limit of 64MB before starting to create only smaller pipes. With 256 processes limited to 1024 FDs each, this results in 1024*64kB + (256*1024 - 1024) * 4kB = 1084 MB of memory allocated for a user. The hard limit is disabled by default to avoid breaking existing applications that make intensive use of pipes (eg: for splicing). Reported-by: socketpair@gmail.com Reported-by: Tetsuo Handa Mitigates: CVE-2013-4312 (Linux 2.0+) Suggested-by: Linus Torvalds Signed-off-by: Willy Tarreau Signed-off-by: Al Viro [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings

i2c: i801: add Intel Lewisburg device IDs

2016-01-22T21:40:13Z

commit cdc5a3110e7c3ae793f367285789a6bc39c962dc upstream. Adding Intel codename Lewisburg platform device IDs for SMBus. Signed-off-by: Alexandra Yates Reviewed-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Document Intel DNV and Broxton

2016-01-22T21:40:12Z

commit 2b630df721ee4c286d286ab5d5d958d34c86f067 upstream. Add missing entries into i2c-i801 documentation and Kconfig about recently added Intel DNV and Broxton. Reported-by: Jean Delvare Signed-off-by: Jarkko Nikula Reviewed-by: Mika Westerberg Reviewed-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add DeviceIDs for SunrisePoint LP

2016-01-22T21:40:12Z

commit 3eee1799aed90e990e02a73a89bfcff1982c74dd upstream. Signed-off-by: Devin Ryles Reviewed-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add Device IDs for Intel Sunrise Point PCH

2016-01-22T21:40:12Z

commit 3e27a8445c21f8056517f188303827450590d868 upstream. This patch adds the I2C/SMBus Device IDs for the Intel Sunrise Point PCH. Signed-off-by: James Ralston Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add device ID for Intel Wildcat Point PCH

2016-01-22T21:40:12Z

commit b299de839157852c563b9f133c8b7e630545a9c3 upstream. Signed-off-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: enable Intel BayTrail SMBUS

2016-01-22T21:40:11Z

commit 1b31e9b76ef8c62291e698dfdb973499986a7f68 upstream. Add Device ID of Intel BayTrail SMBus Controller. Signed-off-by: Chew, Kean ho Signed-off-by: Chew, Chiau Ee Reviewed-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add Device IDs for Intel Wildcat Point-LP PCH

2016-01-22T21:40:11Z

commit afc659241258b40b683998ec801d25d276529f43 upstream. This patch adds the SMBus Device IDs for the Intel Wildcat Point-LP PCH. Signed-off-by: James Ralston Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: SMBus patch for Intel Coleto Creek DeviceIDs

2016-01-22T21:40:11Z

commit f39901c1befa556bc91902516a3e2e460000b4a8 upstream. This patch adds the i801 SMBus Controller DeviceIDs for the Intel Coleto Creek PCH. Signed-off-by: Seth Heasley Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add Device IDs for Intel Wellsburg PCH

2016-01-22T21:40:11Z

commit a3fc0ff00a46c4b32e7214961a5be9a1dc39b60e upstream. This patch adds the SMBus Device IDs for the Intel Wellsburg PCH Signed-off-by: James Ralston Reviewed-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings