Messages in this thread Patch in this message |  | | Date | Fri, 27 Mar 2020 15:01:35 -0500 | From | "Gustavo A. R. Silva" <> | Subject | [PATCH][next] btrfs: inode: Fix uninitialized variable bug |
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geom.len is being used without being properly initialized, previously.
Fix this by placing ASSERT(geom.len <= INT_MAX); after geom.len has been initialized.
Addresses-Coverity-ID: 1491912 ("Uninitialized scalar variable") Fixes: 1eb52c8bd8d6 ("btrfs: get rid of one layer of bios in direct I/O") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- fs/btrfs/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index fce94591e092..00ea02268f54 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -7637,7 +7637,6 @@ static void btrfs_submit_direct_hook(struct btrfs_dio_private *dip) else async_submit = 1; - ASSERT(geom.len <= INT_MAX); do { ret = btrfs_get_io_geometry(fs_info, btrfs_op(dio_bio), start_sector << 9, submit_len, @@ -7647,6 +7646,8 @@ static void btrfs_submit_direct_hook(struct btrfs_dio_private *dip) goto out_err; } + ASSERT(geom.len <= INT_MAX); + clone_len = min_t(int, submit_len, geom.len); /* -- 2.26.0
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