diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 44 | ||||
| -rw-r--r-- | init/do_mounts.c | 10 | ||||
| -rw-r--r-- | init/init_task.c | 2 | ||||
| -rw-r--r-- | init/main.c | 73 |
4 files changed, 58 insertions, 71 deletions
diff --git a/init/Kconfig b/init/Kconfig index 1ea12c64e4c9..55f9f7738ebb 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -83,6 +83,9 @@ config TOOLS_SUPPORT_RELR config CC_HAS_ASM_INLINE def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null) +config CC_HAS_NO_PROFILE_FN_ATTR + def_bool $(success,echo '__attribute__((no_profile_instrument_function)) int x();' | $(CC) -x c - -c -o /dev/null -Werror) + config CONSTRUCTORS bool @@ -442,6 +445,7 @@ config AUDITSYSCALL source "kernel/irq/Kconfig" source "kernel/time/Kconfig" +source "kernel/bpf/Kconfig" source "kernel/Kconfig.preempt" menu "CPU/Task time and stats accounting" @@ -1713,46 +1717,6 @@ config KALLSYMS_BASE_RELATIVE # syscall, maps, verifier -config BPF_LSM - bool "LSM Instrumentation with BPF" - depends on BPF_EVENTS - depends on BPF_SYSCALL - depends on SECURITY - depends on BPF_JIT - help - Enables instrumentation of the security hooks with eBPF programs for - implementing dynamic MAC and Audit Policies. - - If you are unsure how to answer this question, answer N. - -config BPF_SYSCALL - bool "Enable bpf() system call" - select BPF - select IRQ_WORK - select TASKS_TRACE_RCU - select BINARY_PRINTF - select NET_SOCK_MSG if INET - default n - help - Enable the bpf() system call that allows to manipulate eBPF - programs and maps via file descriptors. - -config ARCH_WANT_DEFAULT_BPF_JIT - bool - -config BPF_JIT_ALWAYS_ON - bool "Permanently enable BPF JIT and remove BPF interpreter" - depends on BPF_SYSCALL && HAVE_EBPF_JIT && BPF_JIT - help - Enables BPF JIT and removes BPF interpreter to avoid - speculative execution of BPF instructions by the interpreter - -config BPF_JIT_DEFAULT_ON - def_bool ARCH_WANT_DEFAULT_BPF_JIT || BPF_JIT_ALWAYS_ON - depends on HAVE_EBPF_JIT && BPF_JIT - -source "kernel/bpf/preload/Kconfig" - config USERFAULTFD bool "Enable userfaultfd() system call" depends on MMU diff --git a/init/do_mounts.c b/init/do_mounts.c index a78e44ee6adb..74aede860de7 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -133,14 +133,8 @@ static dev_t devt_from_partuuid(const char *uuid_str) * Attempt to find the requested partition by adding an offset * to the partition number found by UUID. */ - struct block_device *part; - - part = bdget_disk(dev_to_disk(dev), - dev_to_bdev(dev)->bd_partno + offset); - if (part) { - devt = part->bd_dev; - bdput(part); - } + devt = part_devt(dev_to_disk(dev), + dev_to_bdev(dev)->bd_partno + offset); } else { devt = dev->devt; } diff --git a/init/init_task.c b/init/init_task.c index 8b08c2e19cbb..562f2ef8d157 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -71,7 +71,7 @@ struct task_struct init_task .thread_info = INIT_THREAD_INFO(init_task), .stack_refcount = REFCOUNT_INIT(1), #endif - .state = 0, + .__state = 0, .stack = init_stack, .usage = REFCOUNT_INIT(2), .flags = PF_KTHREAD, diff --git a/init/main.c b/init/main.c index 7b6f49c4d388..af521b30a3b8 100644 --- a/init/main.c +++ b/init/main.c @@ -387,16 +387,6 @@ static char * __init xbc_make_cmdline(const char *key) return new_cmdline; } -static u32 boot_config_checksum(unsigned char *p, u32 size) -{ - u32 ret = 0; - - while (size--) - ret += *p++; - - return ret; -} - static int __init bootconfig_params(char *param, char *val, const char *unused, void *arg) { @@ -440,7 +430,7 @@ static void __init setup_boot_config(void) return; } - if (boot_config_checksum((unsigned char *)data, size) != csum) { + if (xbc_calc_checksum(data, size) != csum) { pr_err("bootconfig checksum failed\n"); return; } @@ -693,6 +683,7 @@ noinline void __ref rest_init(void) */ rcu_read_lock(); tsk = find_task_by_pid_ns(pid, &init_pid_ns); + tsk->flags |= PF_NO_SETAFFINITY; set_cpus_allowed_ptr(tsk, cpumask_of(smp_processor_id())); rcu_read_unlock(); @@ -873,6 +864,47 @@ void __init __weak arch_call_rest_init(void) rest_init(); } +static void __init print_unknown_bootoptions(void) +{ + char *unknown_options; + char *end; + const char *const *p; + size_t len; + + if (panic_later || (!argv_init[1] && !envp_init[2])) + return; + + /* + * Determine how many options we have to print out, plus a space + * before each + */ + len = 1; /* null terminator */ + for (p = &argv_init[1]; *p; p++) { + len++; + len += strlen(*p); + } + for (p = &envp_init[2]; *p; p++) { + len++; + len += strlen(*p); + } + + unknown_options = memblock_alloc(len, SMP_CACHE_BYTES); + if (!unknown_options) { + pr_err("%s: Failed to allocate %zu bytes\n", + __func__, len); + return; + } + end = unknown_options; + + for (p = &argv_init[1]; *p; p++) + end += sprintf(end, " %s", *p); + for (p = &envp_init[2]; *p; p++) + end += sprintf(end, " %s", *p); + + pr_notice("Unknown command line parameters:%s\n", unknown_options); + memblock_free(__pa(unknown_options), len); +} + asmlinkage __visible void __init __no_sanitize_address start_kernel(void) { char *command_line; @@ -914,6 +946,7 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void) static_command_line, __start___param, __stop___param - __start___param, -1, -1, NULL, &unknown_bootoption); + print_unknown_bootoptions(); if (!IS_ERR_OR_NULL(after_dashes)) parse_args("Setting init args", after_dashes, NULL, 0, -1, -1, NULL, set_init_arg); @@ -942,11 +975,7 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void) * time - but meanwhile we still have a functioning scheduler. */ sched_init(); - /* - * Disable preemption - early bootup scheduling is extremely - * fragile until we cpu_idle() for the first time. - */ - preempt_disable(); + if (WARN(!irqs_disabled(), "Interrupts were enabled *very* early, fixing it\n")) local_irq_disable(); @@ -1446,6 +1475,11 @@ static int __ref kernel_init(void *unused) { int ret; + /* + * Wait until kthreadd is all set-up. + */ + wait_for_completion(&kthreadd_done); + kernel_init_freeable(); /* need to finish all async __init code before freeing the memory */ async_synchronize_full(); @@ -1526,11 +1560,6 @@ void __init console_on_rootfs(void) static noinline void __init kernel_init_freeable(void) { - /* - * Wait until kthreadd is all set-up. - */ - wait_for_completion(&kthreadd_done); - /* Now the scheduler is fully set up and can do blocking allocations */ gfp_allowed_mask = __GFP_BITS_MASK; @@ -1539,7 +1568,7 @@ static noinline void __init kernel_init_freeable(void) */ set_mems_allowed(node_states[N_MEMORY]); - cad_pid = task_pid(current); + cad_pid = get_pid(task_pid(current)); smp_prepare_cpus(setup_max_cpus); |