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Fix GCC 12 compilation errors

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Squelch false positives reported by GCC 12 with UBSan.

Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #14150
This commit is contained in:
szubersk
2022-11-30 20:27:28 +10:00
committed by Tony Hutter
parent 85c6fd4058
commit 00a3821020
8 changed files with 125 additions and 3 deletions
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module/os/linux/zfs/zio_crypt.c
+18
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@@ -229,8 +229,26 @@ zio_crypt_key_init(uint64_t crypt, zio_crypt_key_t *key)
ASSERT(key != NULL);
ASSERT3U(crypt, <, ZIO_CRYPT_FUNCTIONS);
/*
* Workaround for GCC 12+ with UBSan enabled deficencies.
*
* GCC 12+ invoked with -fsanitize=undefined incorrectly reports the code
* below as violating -Warray-bounds
*/
#if defined(__GNUC__) && !defined(__clang__) && \
((!defined(_KERNEL) && defined(ZFS_UBSAN_ENABLED)) || \
defined(CONFIG_UBSAN))
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
#endif
keydata_len = zio_crypt_table[crypt].ci_keylen;
bzero(key, sizeof (zio_crypt_key_t));
#if defined(__GNUC__) && !defined(__clang__) && \
((!defined(_KERNEL) && defined(ZFS_UBSAN_ENABLED)) || \
defined(CONFIG_UBSAN))
#pragma GCC diagnostic pop
#endif
memset(key, 0, sizeof (zio_crypt_key_t));
/* fill keydata buffers and salt with random data */
ret = random_get_bytes((uint8_t *)&key->zk_guid, sizeof (uint64_t));