Kamalesh Babulal a36e2aa905 livepatch: Validate module/old func name length ... commit 6e9df95b76 upstream. 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. Cc: stable@vger.kernel.org Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-09-09 19:55:58 +02:00
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Kconfig	livepatch: Make livepatch dependent on !TRIM_UNUSED_KSYMS	2017-05-27 00:27:37 +02:00
Makefile	livepatch: change to a per-task consistency model	2017-03-08 09:36:21 +01:00
core.c	livepatch: Validate module/old func name length	2018-09-09 19:55:58 +02:00
core.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
patch.c	livepatch: Fix stacking of patches with respect to RCU	2017-06-20 10:42:19 +02:00
patch.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
transition.c	livepatch: Fix stacking of patches with respect to RCU	2017-06-20 10:42:19 +02:00
transition.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00