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fanotify_user: use upper_32_bits() to verify mask

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I don't see an obvious reason why the upper 32 bit check needs to be
open-coded this way. Switch to upper_32_bits() which is more idiomatic and
should conceptually be the same check.

Cc: Amir Goldstein <amir73il@gmail.com>
Cc: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210325083742.2334933-1-brauner@kernel.org
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Christian Brauner 2021-03-25 09:37:43 +01:00 committed by Jan Kara
parent 7cea2a3c50
commit 22d483b998
1 changed files with 1 additions and 1 deletions
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2
fs/notify/fanotify/fanotify_user.c
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@ -1250,7 +1250,7 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
__func__, fanotify_fd, flags, dfd, pathname, mask);
/* we only use the lower 32 bits as of right now. */
if (mask & ((__u64)0xffffffff << 32))
if (upper_32_bits(mask))
return -EINVAL;
if (flags & ~FANOTIFY_MARK_FLAGS)