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Silence clang static analyzer warnings about stored stack addresses

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Clang's static analyzer complains that nvs_xdr() and nvs_native()
functions return pointers to stack memory. That is technically true, but
the pointers are stored in stack memory from the caller's stack frame,
are not read by the caller and are deallocated when the caller returns,
so this is harmless. We set the pointers to NULL to silence the
warnings.

Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #14612
This commit is contained in:
Richard Yao
2023-03-11 13:17:59 -05:00
committed by Brian Behlendorf
parent 3cb293a6f8
commit 47b994049f
2 changed files with 2 additions and 5 deletions
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module/nvpair/nvpair.c
+2 -2
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@@ -2808,7 +2808,7 @@ nvs_native_create(nvstream_t *nvs, nvs_native_t *native, char *buf,
static void
nvs_native_destroy(nvstream_t *nvs)
{
(void) nvs;
nvs->nvs_private = NULL;
}
static int
@@ -3189,7 +3189,7 @@ nvs_xdr_destroy(nvstream_t *nvs)
switch (nvs->nvs_op) {
case NVS_OP_ENCODE:
case NVS_OP_DECODE:
xdr_destroy((XDR *)nvs->nvs_private);
nvs->nvs_private = NULL;
break;
default:
break;