cifs: fix the race in cifs_writev()

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O_APPEND handling there hadn't been completely fixed by Pavel's
patch; it checks the right value, but it's racy - we can't really
do that until i_mutex has been taken.

Fix by switching to __generic_file_aio_write() (open-coding
generic_file_aio_write(), actually) and pulling mutex_lock() above
inode_size_read().

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Al Viro 2014-04-03 10:27:17 -04:00

parent eab87235c0

commit 19dfc1f5f2

1 changed files with 18 additions and 5 deletions

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23

fs/cifs/file.c

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