On 4/13/21 9:07 AM, Sudhakar Panneerselvam wrote:
NULL pointer dereference was observed in super_written() when it tries to access the mddev structure. [The below stack trace is from an older kernel, but the problem described in this patch applies to the mainline kernel.] ... ... The solution is to call md_super_wait() for external bitmaps after the last call to md_bitmap_daemon_work() in md_bitmap_flush() to ensure there are no pending bitmap writes before proceeding with the tear down. Signed-off-by: Sudhakar Panneerselvam <sudhakar.panneerselvam@xxxxxxxxxx> Reviewed-by: Heming Zhao <heming.zhao@xxxxxxxx> --- drivers/md/md-bitmap.c | 2 ++ 1 file changed, 2 insertions(+)
Hello Sudhakar, A few info to you. If I understand kernel patch submit rules correctly. 1. You couldn't add the line "Reviewed-by: Heming Zhao <heming.zhao@xxxxxxxx>" before I give you this line in my email. But take it easy, you can add my name now. 2. This is v2 patch, you should change title from [PATCH] to [PATCH v2], and also need to write changelog in patch. Thanks, Heming
