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atm: idt77252: fix a memleak in open_card_ubr0 

[ Upstream commit f3616173bf ]

When alloc_scq fails, card->vcs[0] (i.e. vc) should be freed. Otherwise,
in the following call chain:

idt77252_init_one
  |-> idt77252_dev_open
        |-> open_card_ubr0
              |-> alloc_scq [failed]
  |-> deinit_card
        |-> vfree(card->vcs);

card->vcs is freed and card->vcs[0] is leaked.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhipeng Lu 2024-02-01 20:41:05 +08:00 committed by Greg Kroah-Hartman
parent d964dd1bc1
commit 15393c8fd3
1 changed files with 2 additions and 0 deletions
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2
drivers/atm/idt77252.c
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@ -2930,6 +2930,8 @@ open_card_ubr0(struct idt77252_dev *card)
vc->scq = alloc_scq(card, vc->class);
if (!vc->scq) {
printk("%s: can't get SCQ.\n", card->name);
kfree(card->vcs[0]);
card->vcs[0] = NULL;
return -ENOMEM;
}