mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 06:24:53 +08:00
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>
This commit is contained in:
parent
b6040f9706
commit
1a9357f443
@ -3427,7 +3427,7 @@ grace_disallows_io(struct net *net, struct inode *inode)
|
||||
/* Returns true iff a is later than b: */
|
||||
static bool stateid_generation_after(stateid_t *a, stateid_t *b)
|
||||
{
|
||||
return (s32)a->si_generation - (s32)b->si_generation > 0;
|
||||
return (s32)(a->si_generation - b->si_generation) > 0;
|
||||
}
|
||||
|
||||
static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
|
||||
|
Loading…
Reference in New Issue
Block a user