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gdrom: fix a memory leak bug 

In probe_gdrom(), the buffer pointed by 'gd.cd_info' is allocated through
kzalloc() and is used to hold the information of the gdrom device. To
register and unregister the device, the pointer 'gd.cd_info' is passed to
the functions register_cdrom() and unregister_cdrom(), respectively.
However, this buffer is not freed after it is used, which can cause a
memory leak bug.

This patch simply frees the buffer 'gd.cd_info' in exit_gdrom() to fix the
above issue.

Signed-off-by: Wenwen Wang <wang6495@umn.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Wenwen Wang 2018-12-26 20:15:13 -06:00 committed by Jens Axboe
parent d52c499b47
commit 093c48213e
1 changed files with 1 additions and 0 deletions
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drivers/cdrom/gdrom.c
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@ -873,6 +873,7 @@ static void __exit exit_gdrom(void)
platform_device_unregister(pd); platform_device_unregister(pd);
platform_driver_unregister(&gdrom_driver); platform_driver_unregister(&gdrom_driver);
kfree(gd.toc); kfree(gd.toc);
kfree(gd.cd_info);
} }
module_init(init_gdrom); module_init(init_gdrom);