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fanotify: remove unneeded sub-zero check for unsigned value

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Unsigned size_t len in copy_fid_info_to_user is checked
for negative value. This check is redundant as it is
always false.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 5e469c830f ("fanotify: copy event fid info to user")
Signed-off-by: Nikita Kiryushin <kiryushin@ancud.ru>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <d296ff1c-dcf7-4813-994b-3c4369debb7d@ancud.ru>
This commit is contained in:
Nikita Kiryushin 2024-03-14 16:36:56 +03:00 committed by Jan Kara
parent 4cece76496
commit e659522446
1 changed files with 1 additions and 1 deletions
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2
fs/notify/fanotify/fanotify_user.c
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@ -502,7 +502,7 @@ static int copy_fid_info_to_user(__kernel_fsid_t *fsid, struct fanotify_fh *fh,
}
/* Pad with 0's */
WARN_ON_ONCE(len < 0 || len >= FANOTIFY_EVENT_ALIGN);
WARN_ON_ONCE(len >= FANOTIFY_EVENT_ALIGN);
if (len > 0 && clear_user(buf, len))
return -EFAULT;