From: Atul Gopinathan Date: Mon, 3 May 2021 11:56:54 +0000 (+0200) Subject: cdrom: gdrom: deallocate struct gdrom_unit fields in remove_gdrom X-Git-Tag: v5.10.79~4213 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9285808072d4aeabdf710187acae5e09e71157e4;p=platform%2Fkernel%2Flinux-rpi.git cdrom: gdrom: deallocate struct gdrom_unit fields in remove_gdrom commit d03d1021da6fe7f46efe9f2a7335564e7c9db5ab upstream. The fields, "toc" and "cd_info", of "struct gdrom_unit gd" are allocated in "probe_gdrom()". Prevent a memory leak by making sure "gd.cd_info" is deallocated in the "remove_gdrom()" function. Also prevent double free of the field "gd.toc" by moving it from the module's exit function to "remove_gdrom()". This is because, in "probe_gdrom()", the function makes sure to deallocate "gd.toc" in case of any errors, so the exit function invoked later would again free "gd.toc". The patch also maintains consistency by deallocating the above mentioned fields in "remove_gdrom()" along with another memory allocated field "gd.disk". Suggested-by: Jens Axboe Cc: Peter Rosin Cc: stable Signed-off-by: Atul Gopinathan Link: https://lore.kernel.org/r/20210503115736.2104747-28-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c index 466fc3e..8284705 100644 --- a/drivers/cdrom/gdrom.c +++ b/drivers/cdrom/gdrom.c @@ -831,6 +831,8 @@ static int remove_gdrom(struct platform_device *devptr) if (gdrom_major) unregister_blkdev(gdrom_major, GDROM_DEV_NAME); unregister_cdrom(gd.cd_info); + kfree(gd.cd_info); + kfree(gd.toc); return 0; } @@ -862,7 +864,6 @@ static void __exit exit_gdrom(void) { platform_device_unregister(pd); platform_driver_unregister(&gdrom_driver); - kfree(gd.toc); } module_init(init_gdrom);