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linux-stable/mm/damon
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SeongJae Park d8cd49ff1f mm/damon/sysfs: check error from damon_sysfs_update_target() 
commit b4936b544b upstream.

Patch series "mm/damon/sysfs: fix unhandled return values".

Some of DAMON sysfs interface code is not handling return values from some
functions.  As a result, confusing user input handling or NULL-dereference
is possible.  Check those properly.


This patch (of 3):

damon_sysfs_update_target() returns error code for failures, but its
caller, damon_sysfs_set_targets() is ignoring that.  The update function
seems making no critical change in case of such failures, but the behavior
will look like DAMON sysfs is silently ignoring or only partially
accepting the user input.  Fix it.

Link: https://lkml.kernel.org/r/20231106233408.51159-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20231106233408.51159-2-sj@kernel.org
Fixes: 19467a950b ("mm/damon/sysfs: remove requested targets when online-commit inputs")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>	[5.19+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2023-11-28 17:15:02 +00:00
..
Kconfig mm/damon/Kconfig: add DAMON debugfs interface deprecation notice 2023-02-13 15:54:32 -08:00
Makefile mm/damon/modules: deduplicate init steps for DAMON context setup 2022-11-30 15:01:26 -08:00
core-test.h mm/damon/core-test: initialise context before test in damon_test_set_attrs() 2023-07-27 13:07:03 -07:00
core.c mm/damon/core: avoid divide-by-zero during monitoring results update 2023-11-28 17:15:01 +00:00
dbgfs-test.h mm/damon/dbgfs-test: fix is_target_id() change 2022-03-22 15:57:12 -07:00
dbgfs.c mm/damon/dbgfs: print DAMON debugfs interface deprecation message 2023-02-13 15:54:33 -08:00
lru_sort.c mm/damon/lru_sort: avoid divide-by-zero in hot threshold calculation 2023-11-28 17:15:01 +00:00
modules-common.c mm/damon/modules: deduplicate init steps for DAMON context setup 2022-11-30 15:01:26 -08:00
modules-common.h mm/damon/modules: deduplicate init steps for DAMON context setup 2022-11-30 15:01:26 -08:00
ops-common.c mm/damon/ops-common: avoid divide-by-zero during region hotness calculation 2023-11-28 17:15:01 +00:00
ops-common.h mm/damon/ops-common: atomically test and clear young on ptes and pmds 2023-06-09 16:25:55 -07:00
paddr.c mm: ptep_get() conversion 2023-06-19 16:19:25 -07:00
reclaim.c mm/damon/reclaim: add a parameter called skip_anon for avoiding anonymous pages reclamation 2023-01-18 17:12:43 -08:00
sysfs-common.c mm/damon/sysfs: make kobj_type structures constant 2023-02-09 16:51:45 -08:00
sysfs-common.h mm/damon/sysfs: make kobj_type structures constant 2023-02-09 16:51:45 -08:00
sysfs-schemes.c mm/damon/sysfs-schemes: handle tried regions sysfs directory allocation failure 2023-11-28 17:15:01 +00:00
sysfs.c mm/damon/sysfs: check error from damon_sysfs_update_target() 2023-11-28 17:15:02 +00:00
vaddr-test.h mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions() 2023-10-06 13:16:24 +02:00
vaddr.c mm: enable page walking API to lock vmas during the walk 2023-08-21 13:07:20 -07:00