Commit de7d5a3b authored by akpm@osdl.org's avatar akpm@osdl.org Committed by Linus Torvalds

[PATCH] drop_buffers() oops fix

In rare situations, drop_buffers() can be called for a page which has buffers,
but no ->mapping (it was truncated, but the buffers were left behind because
ext3 was still fiddling with them).

But if there was an I/O error in a buffer_head, drop_buffers() will try to get
at the address_space and will oops.
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 552fca4c
No related merge requests found
...@@ -2917,7 +2917,7 @@ drop_buffers(struct page *page, struct buffer_head **buffers_to_free) ...@@ -2917,7 +2917,7 @@ drop_buffers(struct page *page, struct buffer_head **buffers_to_free)
bh = head; bh = head;
do { do {
if (buffer_write_io_error(bh)) if (buffer_write_io_error(bh) && page->mapping)
set_bit(AS_EIO, &page->mapping->flags); set_bit(AS_EIO, &page->mapping->flags);
if (buffer_busy(bh)) if (buffer_busy(bh))
goto failed; goto failed;
......
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