e69a66147d
The commit 08126db5ff73 ("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: 08126db5ff73 ("module: kallsyms: Fix suspicious rcu usage")
Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
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| .. | ||
| debug_kmemleak.c | ||
| decompress.c | ||
| internal.h | ||
| kallsyms.c | ||
| kdb.c | ||
| livepatch.c | ||
| main.c | ||
| Makefile | ||
| procfs.c | ||
| signing.c | ||
| strict_rwx.c | ||
| sysfs.c | ||
| tracking.c | ||
| tree_lookup.c | ||
| version.c | ||