From 6def1a1d2d58eda5834fe2e2ace4560f9cdd7de1 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Fri, 27 Mar 2020 10:10:30 -0700 Subject: [PATCH] fanotify: Fix the checks in fanotify_fsid_equal Clang warns: fs/notify/fanotify/fanotify.c:28:23: warning: self-comparison always evaluates to true [-Wtautological-compare] return fsid1->val[0] == fsid1->val[0] && fsid2->val[1] == fsid2->val[1]; ^ fs/notify/fanotify/fanotify.c:28:57: warning: self-comparison always evaluates to true [-Wtautological-compare] return fsid1->val[0] == fsid1->val[0] && fsid2->val[1] == fsid2->val[1]; ^ 2 warnings generated. The intention was clearly to compare val[0] and val[1] in the two different fsid structs. Fix it otherwise this function always returns true. Fixes: afc894c784c8 ("fanotify: Store fanotify handles differently") Link: https://github.com/ClangBuiltLinux/linux/issues/952 Link: https://lore.kernel.org/r/20200327171030.30625-1-natechancellor@gmail.com Signed-off-by: Nathan Chancellor Reviewed-by: Nick Desaulniers Signed-off-by: Jan Kara --- fs/notify/fanotify/fanotify.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index 4c1a4eb597d5..5435a40f82be 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -25,7 +25,7 @@ static bool fanotify_path_equal(struct path *p1, struct path *p2) static inline bool fanotify_fsid_equal(__kernel_fsid_t *fsid1, __kernel_fsid_t *fsid2) { - return fsid1->val[0] == fsid1->val[0] && fsid2->val[1] == fsid2->val[1]; + return fsid1->val[0] == fsid2->val[0] && fsid1->val[1] == fsid2->val[1]; } static bool fanotify_fh_equal(struct fanotify_fh *fh1,