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dm-verity: avoid double increment of &use_bh_wq_enabled

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[ Upstream commit 72e9ec2fe3 ]

verity_parse_opt_args is called twice, first with the only_modifier_opts,
first with only_modifier_opts == true and then with only_modifier_opts ==
false. Thus, the static branch &use_bh_wq_enabled was incremented twice
and the destructor verity_dtr would only decrement it once.

Fix tihs bug by only incrementing it on the first call, on the second
call, when v->use_bh_wq is true, do nothing.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Assisted-by: Claude:claude-opus-4-6
Cc: stable@vger.kernel.org
Fixes: df326e7a06 ("dm verity: allow optional args to alter primary args handling")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mikulas Patocka
2026-08-03 11:15:38 +02:00
committed by Greg Kroah-Hartman
parent 45ead2e598
commit 949f14390f
1 changed files with 2 additions and 0 deletions
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drivers/md/dm-verity-target.c
+2
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@@ -1172,6 +1172,8 @@ static int verity_parse_opt_args(struct dm_arg_set *as, struct dm_verity *v,
continue;
} else if (!strcasecmp(arg_name, DM_VERITY_OPT_TASKLET_VERIFY)) {
if (v->use_tasklet)
continue;
v->use_tasklet = true;
static_branch_inc(&use_tasklet_enabled);
continue;