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(parent: b6040f9) | patch
nfsd: avoid undefined signed overflow
authorJim Rees <rees@umich.edu>
Fri, 17 May 2013 21:33:00 +0000 (17:33 -0400)
committerJ. Bruce Fields <bfields@redhat.com>
Tue, 21 May 2013 15:02:03 +0000 (11:02 -0400)
commit1a9357f443d64aa41e9b0dc414953663a6fcca19
tree590818d77f07ab18197167024779738ec2a01f12tree | snapshot (tar.gz zip)
parentb6040f9706c4c81cc50b50855ed70840f022bebbcommit | diff
nfsd: avoid undefined signed overflow

In C, signed integer overflow results in undefined behavior, but unsigned
overflow wraps around. So do the subtraction first, then cast to signed.

Reported-by: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
fs/nfsd/nfs4state.c diff | blob | blame | history