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| author | Darrick J. Wong | 2018-05-22 20:48:08 +0200 |
|---|---|---|
| committer | Darrick J. Wong | 2018-05-29 19:46:03 +0200 |
| commit | aee9a4a555b3f1440cc3943d7b9ab5fa072ec62e (patch) | |
| tree | d4d643d27b737da3bb16faf39700580b2b2995e4 /fs | |
| parent | iomap: don't allow holes in swapfiles (diff) | |
| download | kernel-qcow2-linux-aee9a4a555b3f1440cc3943d7b9ab5fa072ec62e.tar.gz kernel-qcow2-linux-aee9a4a555b3f1440cc3943d7b9ab5fa072ec62e.tar.xz kernel-qcow2-linux-aee9a4a555b3f1440cc3943d7b9ab5fa072ec62e.zip | |
fs: clear writeback errors in inode_init_always
In inode_init_always(), we clear the inode mapping flags, which clears
any retained error (AS_EIO, AS_ENOSPC) bits. Unfortunately, we do not
also clear wb_err, which means that old mapping errors can leak through
to new inodes.
This is crucial for the XFS inode allocation path because we recycle old
in-core inodes and we do not want error state from an old file to leak
into the new file. This bug was discovered by running generic/036 and
generic/047 in a loop and noticing that the EIOs generated by the
collision of direct and buffered writes in generic/036 would survive the
remount between 036 and 047, and get reported to the fsyncs (on
different files!) in generic/047.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/inode.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/inode.c b/fs/inode.c index 13ceb98c3bd3..3b55391072f3 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -178,6 +178,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode) mapping->a_ops = &empty_aops; mapping->host = inode; mapping->flags = 0; + mapping->wb_err = 0; atomic_set(&mapping->i_mmap_writable, 0); mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE); mapping->private_data = NULL; |