/* * security/tomoyo/environ.c * * Copyright (C) 2005-2011 NTT DATA CORPORATION */ #include "common.h" /** * tomoyo_check_env_acl - Check permission for environment variable's name. * * @r: Pointer to "struct tomoyo_request_info". * @ptr: Pointer to "struct tomoyo_acl_info". * * Returns true if granted, false otherwise. */ static bool tomoyo_check_env_acl(struct tomoyo_request_info *r, const struct tomoyo_acl_info *ptr) { const struct tomoyo_env_acl *acl = container_of(ptr, typeof(*acl), head); return tomoyo_path_matches_pattern(r->param.environ.name, acl->env); } /** * tomoyo_audit_env_log - Audit environment variable name log. * * @r: Pointer to "struct tomoyo_request_info". * * Returns 0 on success, negative value otherwise. */ static int tomoyo_audit_env_log(struct tomoyo_request_info *r) { return tomoyo_supervisor(r, "misc env %s\n", r->param.environ.name->name); } /** * tomoyo_env_perm - Check permission for environment variable's name. * * @r: Pointer to "struct tomoyo_request_info". * @env: The name of environment variable. * * Returns 0 on success, negative value otherwise. * * Caller holds tomoyo_read_lock(). */ int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env) { struct tomoyo_path_info environ; int error; if (!env || !*env) return 0; environ.name = env; tomoyo_fill_path_info(&environ); r->param_type = TOMOYO_TYPE_ENV_ACL; r->param.environ.name = &environ; do { tomoyo_check_acl(r, tomoyo_check_env_acl); error = tomoyo_audit_env_log(r); } while (error == TOMOYO_RETRY_REQUEST); return error; } /** * tomoyo_same_env_acl - Check for duplicated "struct tomoyo_env_acl" entry. * * @a: Pointer to "struct tomoyo_acl_info". * @b: Pointer to "struct tomoyo_acl_info". * * Returns true if @a == @b, false otherwise. */ static bool tomoyo_same_env_acl(const struct tomoyo_acl_info *a, const struct tomoyo_acl_info *b) { const struct tomoyo_env_acl *p1 = container_of(a, typeof(*p1), head); const struct tomoyo_env_acl *p2 = container_of(b, typeof(*p2), head); return p1->env == p2->env; } /** * tomoyo_write_env - Write "struct tomoyo_env_acl" list. * * @param: Pointer to "struct tomoyo_acl_param". * * Returns 0 on success, negative value otherwise. * * Caller holds tomoyo_read_lock(). */ static int tomoyo_write_env(struct tomoyo_acl_param *param) { struct tomoyo_env_acl e = { .head.type = TOMOYO_TYPE_ENV_ACL }; int error = -ENOMEM; const char *data = tomoyo_read_token(param); if (!tomoyo_correct_word(data) || strchr(data, '=')) return -EINVAL; e.env = tomoyo_get_name(data); if (!e.env) return error; error = tomoyo_update_domain(&e.head, sizeof(e), param, tomoyo_same_env_acl, NULL); tomoyo_put_name(e.env); return error; } /** * tomoyo_write_misc - Update environment variable list. * * @param: Pointer to "struct tomoyo_acl_param". * * Returns 0 on success, negative value otherwise. */ int tomoyo_write_misc(struct tomoyo_acl_param *param) { if (tomoyo_str_starts(¶m->data, "env ")) return tomoyo_write_env(param); return -EINVAL; } 83e8adf5c48c421a4ca76468'>serial/aircable.c
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 23:58:38 +0100
committerIngo Molnar <mingo@kernel.org>2017-02-01 08:37:27 +0100
commitdd86e373e09fb16b83e8adf5c48c421a4ca76468 (patch)
tree55703c2ea8584e303e342090614e0aab3509ab21 /drivers/usb/serial/aircable.c
parent0b3589be9b98994ce3d5aeca52445d1f5627c4ba (diff)
perf/x86/intel/rapl: Make package handling more robust
The package management code in RAPL relies on package mapping being available before a CPU is started. This changed with: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") because the ACPI/BIOS information turned out to be unreliable, but that left RAPL in broken state. This was not noticed because on a regular boot all CPUs are online before RAPL is initialized. A possible fix would be to reintroduce the mess which allocates a package data structure in CPU prepare and when it turns out to already exist in starting throw it away later in the CPU online callback. But that's a horrible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/usb/serial/aircable.c')