linux/block/partitions
Michael Schmitz b6f3f28f60 block: add overflow checks for Amiga partition support
The Amiga partition parser module uses signed int for partition sector
address and count, which will overflow for disks larger than 1 TB.

Use u64 as type for sector address and size to allow using disks up to
2 TB without LBD support, and disks larger than 2 TB with LBD. The RBD
format allows to specify disk sizes up to 2^128 bytes (though native
OS limitations reduce this somewhat, to max 2^68 bytes), so check for
u64 overflow carefully to protect against overflowing sector_t.

Bail out if sector addresses overflow 32 bits on kernels without LBD
support.

This bug was reported originally in 2012, and the fix was created by
the RDB author, Joanne Dow <jdow@earthlink.net>. A patch had been
discussed and reviewed on linux-m68k at that time but never officially
submitted (now resubmitted as patch 1 in this series).
This patch adds additional error checking and warning messages.

Reported-by: Martin Steigerwald <Martin@lichtvoll.de>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=43511
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Message-ID: <201206192146.09327.Martin@lichtvoll.de>
Cc: <stable@vger.kernel.org> # 5.2
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Link: https://lore.kernel.org/r/20230620201725.7020-4-schmitzmic@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-06-20 14:28:17 -06:00
..
acorn.c block/partitions/acorn: Remove redundant assignments 2022-04-23 07:15:26 -06:00
aix.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
amiga.c block: add overflow checks for Amiga partition support 2023-06-20 14:28:17 -06:00
atari.c block/partitions/atari: Remove redundant assignment 2022-04-23 07:15:26 -06:00
atari.h block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
check.h block: Convert read_part_sector() to use a folio 2022-08-02 12:34:03 -04:00
cmdline.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
core.c block: add capacity validation in bdev_add_partition() 2023-06-20 12:50:51 -06:00
efi.c partitions/efi: use bdev_nr_bytes instead of open coding it 2021-10-19 06:16:50 -06:00
efi.h block: remove genhd.h 2022-02-02 07:49:59 -07:00
ibm.c partitions/ibm: use bdev_nr_sectors instead of open coding it 2021-10-19 06:17:33 -06:00
karma.c block: remove block/partitions/karma.h 2020-03-24 07:57:08 -06:00
Kconfig block: move menu "Partition type" to block/partitions/Kconfig 2021-10-18 06:17:35 -06:00
ldm.c block/partitions/ldm: Remove redundant assignments 2022-04-23 07:15:26 -06:00
ldm.h block: remove genhd.h 2022-02-02 07:49:59 -07:00
mac.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
mac.h block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
Makefile block: merge partition-generic.c and check.c 2020-03-24 07:57:08 -06:00
msdos.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
osf.c block: remove block/partitions/osf.h 2020-03-24 07:57:08 -06:00
sgi.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
sun.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
sysv68.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
ultrix.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00