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avoid overflow in disk openers counter

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Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski 2022-06-27 16:21:44 +02:00
parent c3f5a209c0
commit 738a07c821
1 changed files with 6 additions and 2 deletions
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8
modules/cas_disk/exp_obj.c
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@ -347,8 +347,12 @@ static int _casdsk_exp_obj_open(struct block_device *bdev, fmode_t mode)
mutex_lock(&dsk->openers_lock); mutex_lock(&dsk->openers_lock);
if (!dsk->claimed) { if (!dsk->claimed) {
dsk->openers++; if (unlikely(dsk->openers == UINT_MAX)) {
result = 0; result = -EBUSY;
} else {
dsk->openers++;
result = 0;
}
} }
mutex_unlock(&dsk->openers_lock); mutex_unlock(&dsk->openers_lock);