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| author | JackieLiu <liuyun01@kylinos.cn> | 2016-11-28 16:19:19 +0800 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2016-11-29 14:46:21 -0800 |
| commit | fc833c2a2f4129c42efdaed64b9eb6e9ae5fdcee (patch) | |
| tree | 8a69cc0d3019d18a17473314cffd5a6602eb5643 /drivers/md/raid5-cache.c | |
| parent | 9b69173e5c6000b2c6fafc5085dcd7b173f073c8 (diff) | |
| download | talos-obmc-linux-fc833c2a2f4129c42efdaed64b9eb6e9ae5fdcee.tar.gz talos-obmc-linux-fc833c2a2f4129c42efdaed64b9eb6e9ae5fdcee.zip | |
md/raid5-cache: use ring add to prevent overflow
'write_pos' must be protected with 'r5l_ring_add', or it may overflow
Signed-off-by: JackieLiu <liuyun01@kylinos.cn>
Reviewed-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5-cache.c')
| -rw-r--r-- | drivers/md/raid5-cache.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c index 1842ecbf95a1..5ef20c57731f 100644 --- a/drivers/md/raid5-cache.c +++ b/drivers/md/raid5-cache.c @@ -2084,7 +2084,7 @@ r5c_recovery_rewrite_data_only_stripes(struct r5l_log *log, ctx->pos, ctx->seq); mb = page_address(page); offset = le32_to_cpu(mb->meta_size); - write_pos = ctx->pos + BLOCK_SECTORS; + write_pos = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); for (i = sh->disks; i--; ) { struct r5dev *dev = &sh->dev[i]; |
