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fs/ntfs3: Check 'folio' pointer for NULL

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[ Upstream commit 1cd6c96219c429ebcfa8e79a865277376c563803 ]

It can be NULL if bmap is called.

Fixes: 82cae269cf ("fs/ntfs3: Add initialization of super block")
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Konstantin Komarov 2024-04-16 09:54:34 +03:00 • committed by Greg Kroah-Hartman
parent 92ce7359f9
commit 6c8054d590
1 changed files with 11 additions and 6 deletions
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17
fs/ntfs3/inode.c
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@ -571,13 +571,18 @@ static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo,
clear_buffer_uptodate(bh);
if (is_resident(ni)) {
ni_lock(ni);
err = attr_data_read_resident(ni, &folio->page);
ni_unlock(ni);
if (!err)
set_buffer_uptodate(bh);
bh->b_blocknr = RESIDENT_LCN;
bh->b_size = block_size;
if (!folio) {
err = 0;
} else {
ni_lock(ni);
err = attr_data_read_resident(ni, &folio->page);
ni_unlock(ni);
if (!err)
set_buffer_uptodate(bh);
}
return err;
}