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block: Fix a memory leak in bdev_open_by_dev()

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If we early exit here, 'handle' needs to be freed, or some memory leaks.

Fixes: ed5cc702d3 ("block: Add config option to not allow writing to mounted devices")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/8eaec334781e695810aaa383b55de00ca4ab1352.1703439383.git.christophe.jaillet@wanadoo.fr
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christophe JAILLET 2023-12-24 18:36:42 +01:00 committed by Christian Brauner
parent 63513f8574
commit 8ff363ade3
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1 changed files with 4 additions and 2 deletions
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6
block/bdev.c
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@ -828,8 +828,10 @@ struct bdev_handle *bdev_open_by_dev(dev_t dev, blk_mode_t mode, void *holder,
goto free_handle;
/* Blocking writes requires exclusive opener */
if (mode & BLK_OPEN_RESTRICT_WRITES && !holder)
return ERR_PTR(-EINVAL);
if (mode & BLK_OPEN_RESTRICT_WRITES && !holder) {
ret = -EINVAL;
goto free_handle;
}
bdev = blkdev_get_no_open(dev);
if (!bdev) {