Btrfs: btrfs_submit_direct_hook: Handle map_length < bio vector length

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In subpagesize-blocksize scenario, map_length can be less than the length of a
bio vector. Such a condition may cause btrfs_submit_direct_hook() to submit a
zero length bio. Fix this by comparing map_length against block size rather
than with bv_len.

Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Chandan Rajendra 2016-01-21 15:56:00 +05:30 • committed by David Sterba

parent 298cfd3683

commit 5f4dc8fc83

1 changed files with 17 additions and 8 deletions

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fs/btrfs/inode.c

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