The patch titled
readahead: fix NULL filp dereference
has been added to the -mm tree. Its filename is
readahead-fix-null-filp-dereference.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: readahead: fix NULL filp dereference
From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
btrfs relocate_file_extent_cluster() calls us with NULL filp:
[ 4005.426805] BUG: unable to handle kernel NULL pointer dereference at 00000021
[ 4005.426818] IP: [<c109a130>] page_cache_sync_readahead+0x18/0x3e
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Yan Zheng <yanzheng@xxxxxxxx>
Reported-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Tested-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/readahead.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/readahead.c~readahead-fix-null-filp-dereference mm/readahead.c
--- a/mm/readahead.c~readahead-fix-null-filp-dereference
+++ a/mm/readahead.c
@@ -503,7 +503,7 @@ void page_cache_sync_readahead(struct ad
return;
/* be dumb */
- if (filp->f_mode & FMODE_RANDOM) {
+ if (filp && (filp->f_mode & FMODE_RANDOM)) {
force_page_cache_readahead(mapping, filp, offset, req_size);
return;
}
_
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
linux-next.patch
include-linux-fsh-complete-hexification-of-fmode_-constants.patch
readahead-fix-null-filp-dereference.patch
vfs-o_-bit-numbers-uniqueness-check.patch
vfs-o_-bit-numbers-uniqueness-check-update.patch
vfs-o_-bit-numbers-uniqueness-check-fix.patch
vfs-o_-bit-numbers-uniqueness-check-fix-2.patch
vfs-introduce-fmode_neg_offset-for-allowing-negative-f_pos.patch
vfs-add-super-operation-writeback_inodes.patch
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