The patch titled
md: avoid overflow in raid0 calculation with large components
has been removed from the -mm tree. Its filename was
md-avoid-overflow-in-raid0-calculation-with-large-components.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: md: avoid overflow in raid0 calculation with large components
From: NeilBrown <[EMAIL PROTECTED]>
If a raid0 has a component device larger than 4TB, and is accessed on a 32bit
machines, then as 'chunk' is unsigned lock,
chunk << chunksize_bits
can overflow (this can be as high as the size of the device in KB). chunk
itself will not overflow (without triggering a BUG).
So change 'chunk' to be 'sector_t, and get rid of the 'BUG' as it becomes
impossible to hit.
Cc: "Jeff Zheng" <[EMAIL PROTECTED]>
Signed-off-by: Neil Brown <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/md/raid0.c | 3 +--
1 files changed, 1 insertion(+), 2 deletions(-)
diff -puN
drivers/md/raid0.c~md-avoid-overflow-in-raid0-calculation-with-large-components
drivers/md/raid0.c
---
a/drivers/md/raid0.c~md-avoid-overflow-in-raid0-calculation-with-large-components
+++ a/drivers/md/raid0.c
@@ -415,7 +415,7 @@ static int raid0_make_request (request_q
raid0_conf_t *conf = mddev_to_conf(mddev);
struct strip_zone *zone;
mdk_rdev_t *tmp_dev;
- unsigned long chunk;
+ sector_t chunk;
sector_t block, rsect;
const int rw = bio_data_dir(bio);
@@ -470,7 +470,6 @@ static int raid0_make_request (request_q
sector_div(x, zone->nb_dev);
chunk = x;
- BUG_ON(x != (sector_t)chunk);
x = block >> chunksize_bits;
tmp_dev = zone->dev[sector_div(x, zone->nb_dev)];
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
git-md-accel.patch
knfsd-exportfs-add-exportfsh-header.patch
knfsd-exportfs-add-exportfsh-header-fix.patch
knfsd-exportfs-remove-iget-abuse.patch
knfsd-exportfs-remove-iget-abuse-fix.patch
knfsd-exportfs-add-procedural-interface-for-nfsd.patch
knfsd-exportfs-remove-call-macro.patch
knfsd-exportfs-untangle-isdir-logic-in-find_exported_dentry.patch
knfsd-exportfs-move-acceptable-check-into-find_acceptable_alias.patch
knfsd-exportfs-add-find_disconnected_root-helper.patch
knfsd-exportfs-split-out-reconnecting-a-dentry-from-find_exported_dentry.patch
nfsd-warning-fix.patch
use-menuconfig-objects-ii-md.patch
md-improve-message-about-invalid-superblock-during-autodetect.patch
md-improve-the-is_mddev_idle-test-fix.patch
md-check-that-internal-bitmap-does-not-overlap-other-data.patch
md-change-bitmap_unplug-and-others-to-void-functions.patch
fs-introduce-vfs_path_lookup.patch
sunrpc-use-vfs_path_lookup.patch
nfsctl-use-vfs_path_lookup.patch
fs-mark-link_path_walk-static.patch
fs-remove-path_walk-export.patch
-
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