staging: erofs: fix race of initializing xattrs of a inode at the same time

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In real scenario, there could be several threads accessing xattrs
of the same xattr-uninitialized inode, and init_inode_xattrs()
almost at the same time.

That's actually an unexpected behavior, this patch closes the race.

Fixes: b17500a0fd ("staging: erofs: introduce xattr & acl support")
Cc: <stable@vger.kernel.org> # 4.19+
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Gao Xiang 2019-02-18 15:19:04 +08:00 • committed by Greg Kroah-Hartman

parent 17b7abbf1e

commit 62dc45979f

2 changed files with 37 additions and 15 deletions

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11

drivers/staging/erofs/internal.h

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41

drivers/staging/erofs/xattr.c

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