Aaron Tomlin e69a66147d module: kallsyms: Ensure preemption in add_kallsyms() with PREEMPT_RT ... The commit 08126db5ff ("module: kallsyms: Fix suspicious rcu usage") under PREEMPT_RT=y, disabling preemption introduced an unbounded latency since the loop is not fixed. This change caused a regression since previously preemption was not disabled and we would dereference RCU-protected pointers explicitly. That being said, these pointers cannot change. Before kallsyms-specific data is prepared/or set-up, we ensure that the unformed module is known to be unique i.e. does not already exist (see load_module()). Therefore, we can fix this by using the common and more appropriate RCU flavour as this section of code can be safely preempted. Reported-by: Steven Rostedt <rostedt@goodmis.org> Fixes: 08126db5ff ("module: kallsyms: Fix suspicious rcu usage") Signed-off-by: Aaron Tomlin <atomlin@redhat.com> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>		2022-07-11 10:19:09 -07:00
..
debug_kmemleak.c	module: Move kmemleak support to a separate file	2022-04-05 08:43:04 -07:00
decompress.c	module: Make internal.h and decompress.c more compliant	2022-04-05 08:42:35 -07:00
internal.h	module: Fix selfAssignment cppcheck warning	2022-07-01 14:44:17 -07:00
kallsyms.c	module: kallsyms: Ensure preemption in add_kallsyms() with PREEMPT_RT	2022-07-11 10:19:09 -07:00
kdb.c	module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC	2022-04-05 08:43:05 -07:00
livepatch.c	module: Move livepatch support to a separate file	2022-04-05 08:43:04 -07:00
main.c	module: Fix "warning: variable 'exit' set but not used"	2022-07-01 14:45:24 -07:00
Makefile	module: Introduce module unload taint tracking	2022-05-12 10:29:41 -07:00
procfs.c	module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC	2022-04-05 08:43:05 -07:00
signing.c	module: Fix prefix for module.sig_enforce module param	2022-06-02 12:44:33 -07:00
strict_rwx.c	module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC	2022-04-05 08:43:05 -07:00
sysfs.c	module: Move sysfs support into a separate file	2022-04-05 08:43:04 -07:00
tracking.c	module: Introduce module unload taint tracking	2022-05-12 10:29:41 -07:00
tree_lookup.c	module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC	2022-04-05 08:43:05 -07:00
version.c	Modules updates for v5.19-rc1	2022-05-26 17:13:43 -07:00