[lkml]   [2018]   [Jul]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] livepatch: Validate module/old func name length
On Fri, 20 Jul 2018, Kamalesh Babulal wrote:

> livepatch module author can pass module name/old function name with more
> than the defined character limit. With obj->name length greater than
> MODULE_NAME_LEN, the livepatch module gets loaded but waits forever on
> the module specified by obj->name to be loaded. It also populates a /sys
> directory with an untruncated object name.
> In the case of funcs->old_name length greater then KSYM_NAME_LEN, it
> would not match against any of the symbol table entries. Instead loop
> through the symbol table comparing them against a nonexisting function,
> which can be avoided.
> The same issues apply, to misspelled/incorrect names. At least gatekeep
> the modules with over the limit string length, by checking for their
> length during livepatch module registration.
> Signed-off-by: Kamalesh Babulal <>

Applied, thanks.

Jiri Kosina

 \ /
  Last update: 2018-07-23 12:13    [W:0.065 / U:6.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site