The patch titled
direct-io: fix error-path crashes
has been added to the -mm tree. Its filename is
direct-io-fix-error-path-crashes.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: direct-io: fix error-path crashes
From: Badari Pulavarty <pbadari@xxxxxxxxxx>
Need to initialize map_bh.b_state to zero. Otherwise, in case of a faulty
user-buffer its possible to go into dio_zero_block() and submit a page by
mistake - since it checks for buffer_new().
http://marc.info/?l=linux-kernel&m=118551339032528&w=2
Signed-off-by: Badari Pulavarty <pbadari@xxxxxxxxxx>
Cc: Joe Jin <joe.jin@xxxxxxxxxx>
Cc: Zach Brown <zach.brown@xxxxxxxxxx>
Cc: gurudas pai <gurudas.pai@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/direct-io.c | 1 +
1 files changed, 1 insertion(+)
diff -puN fs/direct-io.c~direct-io-fix-error-path-crashes fs/direct-io.c
--- a/fs/direct-io.c~direct-io-fix-error-path-crashes
+++ a/fs/direct-io.c
@@ -974,6 +974,7 @@ direct_io_worker(int rw, struct kiocb *i
dio->get_block = get_block;
dio->end_io = end_io;
dio->map_bh.b_private = NULL;
+ dio->map_bh.b_state = 0;
dio->final_block_in_bio = -1;
dio->next_block_for_io = -1;
_
Patches currently in -mm which might be from pbadari@xxxxxxxxxx are
direct-io-fix-error-path-crashes.patch
ext3-convert-to-new-aops.patch
ext4-convert-to-new-aops.patch
hugetlbfs-read-support.patch
hugetlbfs-read-support-fix.patch
ext2-statfs-improvement-for-block-and-inode-free-count.patch
fix-for-ext2-reservation.patch
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