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authorRitesh Harjani <riteshh@linux.ibm.com>2020-10-08 20:32:48 +0530
committerTheodore Ts'o <tytso@mit.edu>2020-10-18 10:37:15 -0400
commitd1e18b8824dd50cff255e6cecf515ea598eaf9f0 (patch)
tree87cd994bf8656232343d3e047c1c348a2f3628ae /fs
parentafb585a97f81899e39c14658789f02259d8c306a (diff)
ext4: fix bs < ps issue reported with dioread_nolock mount opt
left shifting m_lblk by blkbits was causing value overflow and hence it was not able to convert unwritten to written extent. So, make sure we typecast it to loff_t before do left shift operation. Also in func ext4_convert_unwritten_io_end_vec(), make sure to initialize ret variable to avoid accidentally returning an uninitialized ret. This patch fixes the issue reported in ext4 for bs < ps with dioread_nolock mount option. Fixes: c8cc88163f40df39e50c ("ext4: Add support for blocksize < pagesize in dioread_nolock") Cc: stable@kernel.org Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/af902b5db99e8b73980c795d84ad7bb417487e76.1602168865.git.riteshh@linux.ibm.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext4/extents.c2
-rw-r--r--fs/ext4/inode.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 2baf0debd2b7..e46f3381ba4c 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4769,7 +4769,7 @@ int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode,
int ext4_convert_unwritten_io_end_vec(handle_t *handle, ext4_io_end_t *io_end)
{
- int ret, err = 0;
+ int ret = 0, err = 0;
struct ext4_io_end_vec *io_end_vec;
/*
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 2ac294fc2247..09096fe6170e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2258,7 +2258,7 @@ static int mpage_process_page(struct mpage_da_data *mpd, struct page *page,
err = PTR_ERR(io_end_vec);
goto out;
}
- io_end_vec->offset = mpd->map.m_lblk << blkbits;
+ io_end_vec->offset = (loff_t)mpd->map.m_lblk << blkbits;
}
*map_bh = true;
goto out;