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authorLinus Torvalds <torvalds@linux-foundation.org>2022-06-12 20:33:38 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-06-12 20:33:38 +0300
commit3cae0d84756aea1c563f0cf9f668cf13e281e8a5 (patch)
tree18aade35385c090757368ee9313b3dbec4cbf4dd /include
parent7a68065eb9cd194cf03f135c9211eeb2d5c4c0a0 (diff)
parent17b0128a136d43e5f8f268631f48bc267373ebff (diff)
downloadlinux-3cae0d84756aea1c563f0cf9f668cf13e281e8a5.tar.xz
Merge tag 'random-5.19-rc2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
Pull random number generator fixes from Jason Donenfeld: - A fix for a 5.19 regression for a case in which early device tree initializes the RNG, which flips a static branch. On most plaforms, jump labels aren't initialized until much later, so this caused splats. On a few mailing list threads, we cooked up easy fixes for arm64, arm32, and risc-v. But then things looked slightly more involved for xtensa, powerpc, arc, and mips. And at that point, when we're patching 7 architectures in a place before the console is even available, it seems like the cost/risk just wasn't worth it. So random.c works around it now by checking the already exported `static_key_initialized` boolean, as though somebody already ran into this issue in the past. I'm not super jazzed about that; it'd be prettier to not have to complicate downstream code. But I suppose it's practical. - A few small code nits and adding a missing __init annotation. - A change to the default config values to use the cpu and bootloader's seeds for initializing the RNG earlier. This brings them into line with what all the distros do (Fedora/RHEL, Debian, Ubuntu, Gentoo, Arch, NixOS, Alpine, SUSE, and Void... at least), and moreover will now give us test coverage in various test beds that might have caught the above device tree bug earlier. - A change to WireGuard CI's configuration to increase test coverage around the RNG. - A documentation comment fix to unrelated maintainerless CRC code that I was asked to take, I guess because it has to do with polynomials (which the RNG thankfully no longer uses). * tag 'random-5.19-rc2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random: wireguard: selftests: use maximum cpu features and allow rng seeding random: remove rng_has_arch_random() random: credit cpu and bootloader seeds by default random: do not use jump labels before they are initialized random: account for arch randomness in bits random: mark bootloader randomness code as __init random: avoid checking crng_ready() twice in random_init() crc-itu-t: fix typo in CRC ITU-T polynomial comment
Diffstat (limited to 'include')
-rw-r--r--include/linux/crc-itu-t.h2
-rw-r--r--include/linux/random.h3
2 files changed, 2 insertions, 3 deletions
diff --git a/include/linux/crc-itu-t.h b/include/linux/crc-itu-t.h
index a4367051e192..2f991a427ade 100644
--- a/include/linux/crc-itu-t.h
+++ b/include/linux/crc-itu-t.h
@@ -4,7 +4,7 @@
*
* Implements the standard CRC ITU-T V.41:
* Width 16
- * Poly 0x1021 (x^16 + x^12 + x^15 + 1)
+ * Poly 0x1021 (x^16 + x^12 + x^5 + 1)
* Init 0
*/
diff --git a/include/linux/random.h b/include/linux/random.h
index fae0c84027fd..20e389a14e5c 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -13,7 +13,7 @@
struct notifier_block;
void add_device_randomness(const void *buf, size_t len);
-void add_bootloader_randomness(const void *buf, size_t len);
+void __init add_bootloader_randomness(const void *buf, size_t len);
void add_input_randomness(unsigned int type, unsigned int code,
unsigned int value) __latent_entropy;
void add_interrupt_randomness(int irq) __latent_entropy;
@@ -74,7 +74,6 @@ static inline unsigned long get_random_canary(void)
int __init random_init(const char *command_line);
bool rng_is_initialized(void);
-bool rng_has_arch_random(void);
int wait_for_random_bytes(void);
/* Calls wait_for_random_bytes() and then calls get_random_bytes(buf, nbytes).