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 <[email protected]>
Fixes: 08126db5ff ("module: kallsyms: Fix suspicious rcu usage")
Signed-off-by: Aaron Tomlin <[email protected]>
Signed-off-by: Luis Chamberlain <[email protected]>

2022-07-11 10:19:09 -07:00

..

debug_kmemleak.c

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decompress.c

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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

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livepatch.c

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main.c

module: Fix "warning: variable 'exit' set but not used"

2022-07-01 14:45:24 -07:00

Makefile

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procfs.c

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signing.c

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strict_rwx.c

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sysfs.c

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tracking.c

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tree_lookup.c

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version.c

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