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md: dm-zoned-target: Initialize return variable r to avoid uninitialized use

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[ Upstream commit 487767bff572d46f7c37ad846c4078f6d6c9cc55 ]

Fix Smatch-detected error:
drivers/md/dm-zoned-target.c:1073 dmz_iterate_devices()
error: uninitialized symbol 'r'.

Smatch detects a possible use of the uninitialized variable 'r' in
dmz_iterate_devices() because if dmz->nr_ddevs is zero, the loop is
skipped and 'r' is returned without being set, leading to undefined
behavior.

Initialize 'r' to 0 before the loop. This ensures that if there are no
devices to iterate over, the function still returns a defined value.

Signed-off-by: Purva Yeshi <purvayeshi550@gmail.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Purva Yeshi
2025-07-10 13:11:57 +05:30
committed by Greg Kroah-Hartman
parent 3eaf16ff81
commit 511ba4025e
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-zoned-target.c
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@@ -1066,7 +1066,7 @@ static int dmz_iterate_devices(struct dm_target *ti,
struct dmz_target *dmz = ti->private;
unsigned int zone_nr_sectors = dmz_zone_nr_sectors(dmz->metadata);
sector_t capacity;
int i, r;
int i, r = 0;
for (i = 0; i < dmz->nr_ddevs; i++) {
capacity = dmz->dev[i].capacity & ~(zone_nr_sectors - 1);