diff options
| author | NeilBrown <neilb@suse.de> | 2014-04-08 22:25:43 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-31 00:52:12 -0400 |
| commit | fdc9aa48b7ca57c9e2154ad68bf0fcd731dabeb7 (patch) | |
| tree | 00ac875b8d0981c5e5be88def4a9890f0363419d /mm | |
| parent | 68ad89c73da6085d14e18f18ec7298821d408b2d (diff) | |
md/raid1: r1buf_pool_alloc: free allocate pages when subsequent allocation fails.
commit da1aab3dca9aa88ae34ca392470b8943159e25fe upstream.
When performing a user-request check/repair (MD_RECOVERY_REQUEST is set)
on a raid1, we allocate multiple bios each with their own set of pages.
If the page allocations for one bio fails, we currently do *not* free
the pages allocated for the previous bios, nor do we free the bio itself.
This patch frees all the already-allocate pages, and makes sure that
all the bios are freed as well.
This bug can cause a memory leak which can ultimately OOM a machine.
It was introduced in 3.10-rc1.
Fixes: a07876064a0b73ab5ef1ebcf14b1cf0231c07858
Cc: Kent Overstreet <koverstreet@google.com>
Reported-by: Russell King - ARM Linux <linux@arm.linux.org.uk>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions