Timo Warns 3eb8e74ec7 fs/partitions/efi.c: corrupted GUID partition tables can cause kernel oops ... The kernel automatically evaluates partition tables of storage devices. The code for evaluating GUID partitions (in fs/partitions/efi.c) contains a bug that causes a kernel oops on certain corrupted GUID partition tables. This bug has security impacts, because it allows, for example, to prepare a storage device that crashes a kernel subsystem upon connecting the device (e.g., a "USB Stick of (Partial) Death"). crc = efi_crc32((const unsigned char *) (*gpt), le32_to_cpu((*gpt)->header_size)); computes a CRC32 checksum over gpt covering (*gpt)->header_size bytes. There is no validation of (*gpt)->header_size before the efi_crc32 call. A corrupted partition table may have large values for (*gpt)->header_size. In this case, the CRC32 computation access memory beyond the memory allocated for gpt, which may cause a kernel heap overflow. Validate value of GUID partition table header size. [akpm@linux-foundation.org: fix layout and indenting] Signed-off-by: Timo Warns <warns@pre-sense.de> Cc: Matt Domsch <Matt_Domsch@dell.com> Cc: Eugene Teo <eugeneteo@kernel.sg> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-05-26 17:12:37 -07:00
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acorn.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
acorn.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
amiga.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
amiga.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
atari.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
atari.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
check.c	fs: fixup warning part_discard_alignment_show()	2011-05-09 08:28:13 +02:00
check.h	block, partition: add partition_meta_info to hd_struct	2010-09-15 16:13:18 +02:00
efi.c	fs/partitions/efi.c: corrupted GUID partition tables can cause kernel oops	2011-05-26 17:12:37 -07:00
efi.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
ibm.c	[S390] partitions: fix build error in ibm partition detection code	2010-08-13 10:06:55 +02:00
ibm.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
karma.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
karma.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
Kconfig	partition: use DEFAULT_SGI_PARTITION for SGI_PARTION default	2008-02-06 10:41:08 -08:00
ldm.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2011-05-23 09:12:26 -07:00
ldm.h	Update broken web addresses in the kernel.	2010-10-18 11:03:14 +02:00
mac.c	fs/partitions: Validate map_count in Mac partition tables	2011-02-17 17:50:51 -08:00
mac.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
Makefile	partition: add support for sysv68 partitions	2007-05-08 11:15:09 -07:00
msdos.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
msdos.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
osf.c	Increase OSF partition limit from 8 to 18	2011-03-16 08:04:07 -07:00
osf.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
sgi.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
sgi.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
sun.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
sun.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
sysv68.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
sysv68.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00
ultrix.c	partitions: fix sometimes unreadable partition strings	2010-08-11 08:59:20 -07:00
ultrix.h	block: use struct parsed_partitions *state universally in partition check code	2010-05-21 20:01:02 +02:00