Messages in this thread Patch in this message | | | From | Luis Chamberlain <> | Subject | [PATCH v3 6/6] loop: be paranoid on exit and prevent new additions / removals | Date | Wed, 29 Apr 2020 07:46:27 +0000 |
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Be pedantic on removal as well and hold the mutex. This should prevent uses of addition while we exit.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> --- drivers/block/loop.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index da693e6a834e..6dccba22c9b5 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -2333,6 +2333,8 @@ static void __exit loop_exit(void) range = max_loop ? max_loop << part_shift : 1UL << MINORBITS; + mutex_lock(&loop_ctl_mutex); + idr_for_each(&loop_index_idr, &loop_exit_cb, NULL); idr_destroy(&loop_index_idr); @@ -2340,6 +2342,8 @@ static void __exit loop_exit(void) unregister_blkdev(LOOP_MAJOR, "loop"); misc_deregister(&loop_misc); + + mutex_unlock(&loop_ctl_mutex); } module_init(loop_init); -- 2.25.1
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