tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Fix NULL dereference in umem.c

Fix NULL dereference in umem.c

Signed-off-by: Neil Brown <neilb@suse.de>
Tested-by: Dave Chinner <dgc@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

authored by

Neil Brown and committed by
Linus Torvalds 794e64d5 76832d84

+2 -1
+2 -1
drivers/block/umem.c
··· 484 484 page->idx++; 485 485 if (page->idx >= bio->bi_vcnt) { 486 486 page->bio = bio->bi_next; 487 - page->idx = page->bio->bi_idx; 487 + if (page->bio) 488 + page->idx = page->bio->bi_idx; 488 489 } 489 490 490 491 pci_unmap_page(card->dev, desc->data_dma_handle,