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misc: vmw_balloon: fix memory leak with using debugfs_lookup() 

[ Upstream commit 209cdbd07c ]

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic at
once.

Cc: Nadav Amit <namit@vmware.com>
Cc: VMware PV-Drivers Reviewers <pv-drivers@vmware.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20230202141100.2291188-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Greg Kroah-Hartman 2023-02-02 15:11:00 +01:00
parent 4459d1e7bd
commit d1c545e44c
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/vmw_balloon.c
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@ -1709,7 +1709,7 @@ static void __init vmballoon_debugfs_init(struct vmballoon *b)
static void __exit vmballoon_debugfs_exit(struct vmballoon *b)
{
static_key_disable(&balloon_stat_enabled.key);
debugfs_remove(debugfs_lookup("vmmemctl", NULL));
debugfs_lookup_and_remove("vmmemctl", NULL);
kfree(b->stats);
b->stats = NULL;
}