dm: fix bug with RCU locking in dm_blk_report_zones
commit5.4-rM2-2.2.x-imx-squashed8947833571
upstream. The dm_get_live_table() function makes RCU read lock so dm_put_live_table() must be called even if dm_table map is not found. Fixes:e76239a374
("block: add a report_zones method") Cc: stable@vger.kernel.org Signed-off-by: Sergei Shtepa <sergei.shtepa@veeam.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
7eb514087c
commit
3b02d67064
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@ -455,8 +455,10 @@ static int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
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return -EAGAIN;
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map = dm_get_live_table(md, &srcu_idx);
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if (!map)
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return -EIO;
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if (!map) {
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ret = -EIO;
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goto out;
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}
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tgt = dm_table_find_target(map, sector);
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if (!tgt) {
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