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fs/cramfs/inode.c: initialize file_ra_state 

commit 3e35102666 upstream.

file_ra_state_init() assumes that the file_ra_state has been zeroed out.
Fixes a KMSAN used-unintialized issue (at least).

Fixes: cf948cbc35 ("cramfs: read_mapping_page() is synchronous")
Reported-by: syzbot <syzbot+8ce7f8308d91e6b8bbe2@syzkaller.appspotmail.com>
  Link: https://lkml.kernel.org/r/0000000000008f74e905f56df987@google.com
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrew Morton 2023-02-26 12:31:11 -08:00 committed by Greg Kroah-Hartman
parent c51d1a3e1d
commit 8929fd5fc5
1 changed files with 1 additions and 1 deletions
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2
fs/cramfs/inode.c
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@ -183,7 +183,7 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset,
unsigned int len)
{
struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
struct file_ra_state ra;
struct file_ra_state ra = {};
struct page *pages[BLKS_PER_BUF];
unsigned i, blocknr, buffer;
unsigned long devsize;