diff options
Diffstat (limited to 'kernel/trace/trace_events_user.c')
| -rw-r--r-- | kernel/trace/trace_events_user.c | 28 |
1 files changed, 9 insertions, 19 deletions
diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c index c428dafe7496..dca6e50b3b21 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1041,7 +1041,7 @@ static int user_field_array_size(const char *type) static int user_field_size(const char *type) { - /* long is not allowed from a user, since it's ambigious in size */ + /* long is not allowed from a user, since it's ambiguous in size */ if (strcmp(type, "s64") == 0) return sizeof(s64); if (strcmp(type, "u64") == 0) @@ -1079,7 +1079,7 @@ static int user_field_size(const char *type) if (str_has_prefix(type, "__rel_loc ")) return sizeof(u32); - /* Uknown basic type, error */ + /* Unknown basic type, error */ return -EINVAL; } @@ -1449,12 +1449,7 @@ static struct trace_event_functions user_event_funcs = { static int user_event_set_call_visible(struct user_event *user, bool visible) { - int ret; - const struct cred *old_cred; - struct cred *cred; - - cred = prepare_creds(); - + CLASS(prepare_creds, cred)(); if (!cred) return -ENOMEM; @@ -1469,17 +1464,12 @@ static int user_event_set_call_visible(struct user_event *user, bool visible) */ cred->fsuid = GLOBAL_ROOT_UID; - old_cred = override_creds(cred); - - if (visible) - ret = trace_add_event_call(&user->call); - else - ret = trace_remove_event_call(&user->call); - - revert_creds(old_cred); - put_cred(cred); + scoped_with_creds(cred) { + if (visible) + return trace_add_event_call(&user->call); - return ret; + return trace_remove_event_call(&user->call); + } } static int destroy_user_event(struct user_event *user) @@ -2475,7 +2465,7 @@ static long user_events_ioctl_reg(struct user_event_file_info *info, /* * Prevent users from using the same address and bit multiple times * within the same mm address space. This can cause unexpected behavior - * for user processes that is far easier to debug if this is explictly + * for user processes that is far easier to debug if this is explicitly * an error upon registering. */ if (current_user_event_enabler_exists((unsigned long)reg.enable_addr, |