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[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: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
akpm@osdl.org 2005-05-01 08:58:39 -07:00 committed by Linus Torvalds
parent 552fca4cbe
commit de7d5a3b6c
1 changed files with 1 additions and 1 deletions
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2
fs/buffer.c
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@ -2917,7 +2917,7 @@ drop_buffers(struct page *page, struct buffer_head **buffers_to_free)
bh = head;
do {
if (buffer_write_io_error(bh))
if (buffer_write_io_error(bh) && page->mapping)
set_bit(AS_EIO, &page->mapping->flags);
if (buffer_busy(bh))
goto failed;