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| author |   Li Lingfeng <lilingfeng3@huawei.com> | 2024-01-04 21:36:29 +0800 |
|---|---|---|
| committer |   Song Liu <song@kernel.org> | 2024-02-05 15:23:59 -0800 |
| commit | 570b9147deb6b07b955b55e06c714ca12a5f3e16 (patch) | |
| tree | b1e07d0656496a157ed6cb9083f8acf6639bd3b1 /include/linux/blkdev.h | |
| parent | md: get rdev->mddev with READ_ONCE() (diff) | |
| download | wireguard-linux-570b9147deb6b07b955b55e06c714ca12a5f3e16.tar.xz wireguard-linux-570b9147deb6b07b955b55e06c714ca12a5f3e16.zip | |
md: use RCU lock to protect traversal in md_spares_need_change()
Since md_start_sync() will be called without the protect of mddev_lock,
and it can run concurrently with array reconfiguration, traversal of rdev
in it should be protected by RCU lock.
Commit bc08041b32ab ("md: suspend array in md_start_sync() if array need
reconfiguration") added md_spares_need_change() to md_start_sync(),
casusing use of rdev without any protection.
Fix this by adding RCU lock in md_spares_need_change().
Fixes: bc08041b32ab ("md: suspend array in md_start_sync() if array need reconfiguration")
Cc: stable@vger.kernel.org # 6.7+
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240104133629.1277517-1-lilingfeng@huaweicloud.com
Diffstat (limited to 'include/linux/blkdev.h')
0 files changed, 0 insertions, 0 deletions