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(parent: eab8723) | patch
cifs: fix the race in cifs_writev()
authorAl Viro <viro@zeniv.linux.org.uk>
Thu, 3 Apr 2014 14:27:17 +0000 (10:27 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Sat, 12 Apr 2014 10:52:48 +0000 (06:52 -0400)
commit19dfc1f5f2ef03a52aa30c8257c5745edef23f55
tree3846636f530b1e23d685b1652cd73ab8707445fbtree | snapshot
parenteab87235c0f5979503a547f836a93a3d327c4201commit | diff
cifs: fix the race in cifs_writev()

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>
fs/cifs/file.c diff | blob | history
Linux Kernel tree with some unpolished code for Colibri/Apalis modules