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05 April 2024, 19:05:47 UTC
Revision d55b352b01bc78fbc3d1bb650140668b87e58bf9 authored by Arnd Bergmann on 22 November 2016, 20:50:52 UTC, committed by Anna Schumaker on 22 November 2016, 21:11:44 UTC 
NFSv4.x: hide array-bounds warning
 
A correct bugfix introduced a harmless warning that shows up with gcc-7:

fs/nfs/callback.c: In function 'nfs_callback_up':
fs/nfs/callback.c:214:14: error: array subscript is outside array bounds [-Werror=array-bounds]

What happens here is that the 'minorversion == 0' check tells the
compiler that we assume minorversion can be something other than 0,
but when CONFIG_NFS_V4_1 is disabled that would be invalid and
result in an out-of-bounds access.

The added check for IS_ENABLED(CONFIG_NFS_V4_1) tells gcc that this
really can't happen, which makes the code slightly smaller and also
avoids the warning.

The bugfix that introduced the warning is marked for stable backports,
we want this one backported to the same releases.

Fixes: 98b0f80c2396 ("NFSv4.x: Fix a refcount leak in nfs_callback_up_net")
Cc: stable@vger.kernel.org # v3.7+
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
1 parent d75a6a0
History
Tip revision: d55b352b01bc78fbc3d1bb650140668b87e58bf9 authored by Arnd Bergmann on 22 November 2016, 20:50:52 UTC
NFSv4.x: hide array-bounds warning
Tip revision: d55b352
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.cocciconfig -rw-r--r-- 59 bytes
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