commit: db2e8ae94cabc877b43000900c80c31552838371 Author: Mike Pagano <mpagano <AT> gentoo <DOT> org> AuthorDate: Fri Aug 7 19:15:49 2020 +0000 Commit: Mike Pagano <mpagano <AT> gentoo <DOT> org> CommitDate: Fri Aug 7 19:15:49 2020 +0000 URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=db2e8ae9
Linux patch 4.19.138 Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org> 0000_README | 4 + 1137_linux-4.19.138.patch | 258 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 262 insertions(+) diff --git a/0000_README b/0000_README index d6fa27c..c72d2c2 100644 --- a/0000_README +++ b/0000_README @@ -587,6 +587,10 @@ Patch: 1136_linux-4.19.137.patch From: https://www.kernel.org Desc: Linux 4.19.137 +Patch: 1137_linux-4.19.138.patch +From: https://www.kernel.org +Desc: Linux 4.19.138 + Patch: 1500_XATTR_USER_PREFIX.patch From: https://bugs.gentoo.org/show_bug.cgi?id=470644 Desc: Support for namespace user.pax.* on tmpfs. diff --git a/1137_linux-4.19.138.patch b/1137_linux-4.19.138.patch new file mode 100644 index 0000000..cad026c --- /dev/null +++ b/1137_linux-4.19.138.patch @@ -0,0 +1,258 @@ +diff --git a/Makefile b/Makefile +index edf1799c08d2..daaa8ab2f550 100644 +--- a/Makefile ++++ b/Makefile +@@ -1,7 +1,7 @@ + # SPDX-License-Identifier: GPL-2.0 + VERSION = 4 + PATCHLEVEL = 19 +-SUBLEVEL = 137 ++SUBLEVEL = 138 + EXTRAVERSION = + NAME = "People's Front" + +diff --git a/arch/arm/include/asm/percpu.h b/arch/arm/include/asm/percpu.h +index a89b4076cde4..72821b4721ad 100644 +--- a/arch/arm/include/asm/percpu.h ++++ b/arch/arm/include/asm/percpu.h +@@ -16,6 +16,8 @@ + #ifndef _ASM_ARM_PERCPU_H_ + #define _ASM_ARM_PERCPU_H_ + ++#include <asm/thread_info.h> ++ + /* + * Same as asm-generic/percpu.h, except that we store the per cpu offset + * in the TPIDRPRW. TPIDRPRW only exists on V6K and V7 +diff --git a/drivers/char/random.c b/drivers/char/random.c +index d5f970d039bb..6a5d4dfafc47 100644 +--- a/drivers/char/random.c ++++ b/drivers/char/random.c +@@ -1257,6 +1257,7 @@ void add_interrupt_randomness(int irq, int irq_flags) + + fast_mix(fast_pool); + add_interrupt_bench(cycles); ++ this_cpu_add(net_rand_state.s1, fast_pool->pool[cycles & 3]); + + if (unlikely(crng_init == 0)) { + if ((fast_pool->count >= 64) && +diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c +index 3b1a7597af15..cd833f4e64ef 100644 +--- a/fs/ext4/inode.c ++++ b/fs/ext4/inode.c +@@ -3848,6 +3848,11 @@ static ssize_t ext4_direct_IO_read(struct kiocb *iocb, struct iov_iter *iter) + struct inode *inode = mapping->host; + size_t count = iov_iter_count(iter); + ssize_t ret; ++ loff_t offset = iocb->ki_pos; ++ loff_t size = i_size_read(inode); ++ ++ if (offset >= size) ++ return 0; + + /* + * Shared inode_lock is enough for us - it protects against concurrent +diff --git a/include/linux/prandom.h b/include/linux/prandom.h +new file mode 100644 +index 000000000000..aa16e6468f91 +--- /dev/null ++++ b/include/linux/prandom.h +@@ -0,0 +1,78 @@ ++/* SPDX-License-Identifier: GPL-2.0 */ ++/* ++ * include/linux/prandom.h ++ * ++ * Include file for the fast pseudo-random 32-bit ++ * generation. ++ */ ++#ifndef _LINUX_PRANDOM_H ++#define _LINUX_PRANDOM_H ++ ++#include <linux/types.h> ++#include <linux/percpu.h> ++ ++u32 prandom_u32(void); ++void prandom_bytes(void *buf, size_t nbytes); ++void prandom_seed(u32 seed); ++void prandom_reseed_late(void); ++ ++struct rnd_state { ++ __u32 s1, s2, s3, s4; ++}; ++ ++DECLARE_PER_CPU(struct rnd_state, net_rand_state); ++ ++u32 prandom_u32_state(struct rnd_state *state); ++void prandom_bytes_state(struct rnd_state *state, void *buf, size_t nbytes); ++void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state); ++ ++#define prandom_init_once(pcpu_state) \ ++ DO_ONCE(prandom_seed_full_state, (pcpu_state)) ++ ++/** ++ * prandom_u32_max - returns a pseudo-random number in interval [0, ep_ro) ++ * @ep_ro: right open interval endpoint ++ * ++ * Returns a pseudo-random number that is in interval [0, ep_ro). Note ++ * that the result depends on PRNG being well distributed in [0, ~0U] ++ * u32 space. Here we use maximally equidistributed combined Tausworthe ++ * generator, that is, prandom_u32(). This is useful when requesting a ++ * random index of an array containing ep_ro elements, for example. ++ * ++ * Returns: pseudo-random number in interval [0, ep_ro) ++ */ ++static inline u32 prandom_u32_max(u32 ep_ro) ++{ ++ return (u32)(((u64) prandom_u32() * ep_ro) >> 32); ++} ++ ++/* ++ * Handle minimum values for seeds ++ */ ++static inline u32 __seed(u32 x, u32 m) ++{ ++ return (x < m) ? x + m : x; ++} ++ ++/** ++ * prandom_seed_state - set seed for prandom_u32_state(). ++ * @state: pointer to state structure to receive the seed. ++ * @seed: arbitrary 64-bit value to use as a seed. ++ */ ++static inline void prandom_seed_state(struct rnd_state *state, u64 seed) ++{ ++ u32 i = (seed >> 32) ^ (seed << 10) ^ seed; ++ ++ state->s1 = __seed(i, 2U); ++ state->s2 = __seed(i, 8U); ++ state->s3 = __seed(i, 16U); ++ state->s4 = __seed(i, 128U); ++} ++ ++/* Pseudo random number generator from numerical recipes. */ ++static inline u32 next_pseudo_random32(u32 seed) ++{ ++ return seed * 1664525 + 1013904223; ++} ++ ++#endif +diff --git a/include/linux/random.h b/include/linux/random.h +index 445a0ea4ff49..37209b3b22ae 100644 +--- a/include/linux/random.h ++++ b/include/linux/random.h +@@ -106,61 +106,12 @@ declare_get_random_var_wait(long) + + unsigned long randomize_page(unsigned long start, unsigned long range); + +-u32 prandom_u32(void); +-void prandom_bytes(void *buf, size_t nbytes); +-void prandom_seed(u32 seed); +-void prandom_reseed_late(void); +- +-struct rnd_state { +- __u32 s1, s2, s3, s4; +-}; +- +-u32 prandom_u32_state(struct rnd_state *state); +-void prandom_bytes_state(struct rnd_state *state, void *buf, size_t nbytes); +-void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state); +- +-#define prandom_init_once(pcpu_state) \ +- DO_ONCE(prandom_seed_full_state, (pcpu_state)) +- +-/** +- * prandom_u32_max - returns a pseudo-random number in interval [0, ep_ro) +- * @ep_ro: right open interval endpoint +- * +- * Returns a pseudo-random number that is in interval [0, ep_ro). Note +- * that the result depends on PRNG being well distributed in [0, ~0U] +- * u32 space. Here we use maximally equidistributed combined Tausworthe +- * generator, that is, prandom_u32(). This is useful when requesting a +- * random index of an array containing ep_ro elements, for example. +- * +- * Returns: pseudo-random number in interval [0, ep_ro) +- */ +-static inline u32 prandom_u32_max(u32 ep_ro) +-{ +- return (u32)(((u64) prandom_u32() * ep_ro) >> 32); +-} +- + /* +- * Handle minimum values for seeds ++ * This is designed to be standalone for just prandom ++ * users, but for now we include it from <linux/random.h> ++ * for legacy reasons. + */ +-static inline u32 __seed(u32 x, u32 m) +-{ +- return (x < m) ? x + m : x; +-} +- +-/** +- * prandom_seed_state - set seed for prandom_u32_state(). +- * @state: pointer to state structure to receive the seed. +- * @seed: arbitrary 64-bit value to use as a seed. +- */ +-static inline void prandom_seed_state(struct rnd_state *state, u64 seed) +-{ +- u32 i = (seed >> 32) ^ (seed << 10) ^ seed; +- +- state->s1 = __seed(i, 2U); +- state->s2 = __seed(i, 8U); +- state->s3 = __seed(i, 16U); +- state->s4 = __seed(i, 128U); +-} ++#include <linux/prandom.h> + + #ifdef CONFIG_ARCH_RANDOM + # include <asm/archrandom.h> +@@ -191,10 +142,4 @@ static inline bool arch_has_random_seed(void) + } + #endif + +-/* Pseudo random number generator from numerical recipes. */ +-static inline u32 next_pseudo_random32(u32 seed) +-{ +- return seed * 1664525 + 1013904223; +-} +- + #endif /* _LINUX_RANDOM_H */ +diff --git a/kernel/time/timer.c b/kernel/time/timer.c +index 6c54cf481fde..61e41ea3a96e 100644 +--- a/kernel/time/timer.c ++++ b/kernel/time/timer.c +@@ -44,6 +44,7 @@ + #include <linux/sched/debug.h> + #include <linux/slab.h> + #include <linux/compat.h> ++#include <linux/random.h> + + #include <linux/uaccess.h> + #include <asm/unistd.h> +@@ -1654,6 +1655,13 @@ void update_process_times(int user_tick) + scheduler_tick(); + if (IS_ENABLED(CONFIG_POSIX_TIMERS)) + run_posix_cpu_timers(p); ++ ++ /* The current CPU might make use of net randoms without receiving IRQs ++ * to renew them often enough. Let's update the net_rand_state from a ++ * non-constant value that's not affine to the number of calls to make ++ * sure it's updated when there's some activity (we don't care in idle). ++ */ ++ this_cpu_add(net_rand_state.s1, rol32(jiffies, 24) + user_tick); + } + + /** +diff --git a/lib/random32.c b/lib/random32.c +index 4aaa76404d56..036de0c93e22 100644 +--- a/lib/random32.c ++++ b/lib/random32.c +@@ -48,7 +48,7 @@ static inline void prandom_state_selftest(void) + } + #endif + +-static DEFINE_PER_CPU(struct rnd_state, net_rand_state) __latent_entropy; ++DEFINE_PER_CPU(struct rnd_state, net_rand_state); + + /** + * prandom_u32_state - seeded pseudo-random number generator.
