Commit 23b230ba authored by Miaohe Lin's avatar Miaohe Lin Committed by Andrew Morton
Browse files

mm/swap: print bad swap offset entry in get_swap_device 

If offset exceeds the si->max, print bad swap offset entry to help debug
the unexpected case.

Link: https://lkml.kernel.org/r/20220509131416.17553-6-linmiaohe@huawei.com


Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Reviewed-by: default avatarOscar Salvador <osalvador@suse.de>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: NeilBrown <neilb@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent bc4a68ad

mm/swapfile.c

+1 −0
Original line number Diff line number Diff line
@@ -1271,6 +1271,7 @@ struct swap_info_struct *get_swap_device(swp_entry_t entry) 
out:

	return NULL;

put_out:

	pr_err("%s: %s%08lx\n", __func__, Bad_offset, entry.val);

	percpu_ref_put(&si->users);

	return NULL;

}