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| author | Petr Mladek <pmladek@suse.com> | 2020-01-16 16:31:42 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2020-01-17 11:12:06 +0100 |
| commit | 8f6b88662cacb1d01398c1e8be52aeac433189f6 (patch) | |
| tree | 29ed4a7bbc4cbff644df8f5cf54400956ccb09c9 /samples/livepatch/livepatch-shadow-fix1.c | |
| parent | Merge tag 'livepatching-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel... (diff) | |
| download | linux-8f6b88662cacb1d01398c1e8be52aeac433189f6.tar.xz linux-8f6b88662cacb1d01398c1e8be52aeac433189f6.zip | |
livepatch/sample: Use the right type for the leaking data pointer
The "leak" pointer, in the sample of shadow variable API, is allocated
as sizeof(int). Let's help developers and static analyzers with
understanding the code by using the appropriate pointer type.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Joe Lawrence <joe.lawrence@redhat.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'samples/livepatch/livepatch-shadow-fix1.c')
| -rw-r--r-- | samples/livepatch/livepatch-shadow-fix1.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/samples/livepatch/livepatch-shadow-fix1.c b/samples/livepatch/livepatch-shadow-fix1.c index e89ca4546114..bab12bdb753f 100644 --- a/samples/livepatch/livepatch-shadow-fix1.c +++ b/samples/livepatch/livepatch-shadow-fix1.c @@ -52,8 +52,8 @@ struct dummy { */ static int shadow_leak_ctor(void *obj, void *shadow_data, void *ctor_data) { - void **shadow_leak = shadow_data; - void *leak = ctor_data; + int **shadow_leak = shadow_data; + int *leak = ctor_data; *shadow_leak = leak; return 0; @@ -62,7 +62,7 @@ static int shadow_leak_ctor(void *obj, void *shadow_data, void *ctor_data) static struct dummy *livepatch_fix1_dummy_alloc(void) { struct dummy *d; - void *leak; + int *leak; d = kzalloc(sizeof(*d), GFP_KERNEL); if (!d) @@ -76,7 +76,7 @@ static struct dummy *livepatch_fix1_dummy_alloc(void) * variable. A patched dummy_free routine can later fetch this * pointer to handle resource release. */ - leak = kzalloc(sizeof(int), GFP_KERNEL); + leak = kzalloc(sizeof(*leak), GFP_KERNEL); if (!leak) { kfree(d); return NULL; @@ -94,7 +94,7 @@ static struct dummy *livepatch_fix1_dummy_alloc(void) static void livepatch_fix1_dummy_leak_dtor(void *obj, void *shadow_data) { void *d = obj; - void **shadow_leak = shadow_data; + int **shadow_leak = shadow_data; kfree(*shadow_leak); pr_info("%s: dummy @ %p, prevented leak @ %p\n", @@ -103,7 +103,7 @@ static void livepatch_fix1_dummy_leak_dtor(void *obj, void *shadow_data) static void livepatch_fix1_dummy_free(struct dummy *d) { - void **shadow_leak; + int **shadow_leak; /* * Patch: fetch the saved SV_LEAK shadow variable, detach and |