Possible memory leak in function (reserve_range) not freeing pointer (regionid)

Greg KH gregkh at linuxfoundation.org
Mon Dec 1 02:51:10 UTC 2014


On Sun, Nov 30, 2014 at 02:00:45PM -0600, Ahmed Tamrawi wrote:
> Bug Report: https://bugzilla.kernel.org/show_bug.cgi?id=89101
> Linux Version [3.17-rc1]

That's a very old kernel version.

> Configuration: Default configuration for x86
> 
> 
> Function (reserve_range) in file (drivers/pnp/system.c) allocates
> pointer (regionid) on line (32) and passes it to function
> (__request_region) through the macros: (request_region) at line (38)
> or (request_mem_region) at line (40). However, if the resource (res)
> is allocated through (__request_region) function, then the pointer
> (res->name) points to the allocated pointer (regionid). Then, there is
> no way in function (free_resource) or function (release_resource) to
> free the pointer (regionid) or (res->name). Thus, causing a potential
> memory leak!

How does this relate to the mailing list you sent this to?

Please send a patch for the issue against Linus's latest kernel tree to
help explain things better.

thanks,

greg k-h


More information about the devel mailing list