Input: sparse-keymap - use a managed allocation for keymap copy - linux-dev - Linux kernel development work

diff options

author	Michał Kępień <kernel@kempniu.pl>	2017-03-08 09:20:10 -0800
committer	Dmitry Torokhov <dmitry.torokhov@gmail.com>	2017-03-08 14:28:53 -0800
commit	fabeb165afd52a3fb05b9b68e5a3550609b8e157 (patch)
tree	a5851d7d6d6a45dd1e571b05de4bc07be9670514 /tools/perf/scripts/python/event_analyzing_sample.py
parent	Linux 4.10 (diff)

Input: sparse-keymap - use a managed allocation for keymap copy

Some platform drivers use devm_input_allocate_device() together with sparse_keymap_setup() in their .probe callbacks. While using the former simplifies error handling, using the latter necessitates calling sparse_keymap_free() in the error path and upon module unloading to avoid leaking the copy of the keymap allocated by sparse_keymap_setup(). To help prevent such leaks and enable simpler error handling, make sparse_keymap_setup() use devm_kmemdup() to create the keymap copy so that it gets automatically freed. This works for both managed and non-managed input devices as the keymap is freed after the last reference to the input device is dropped. Note that actions previously taken by sparse_keymap_free(), i.e. taking the input device's mutex and zeroing its keycode and keycodemax fields, are now redundant because the managed keymap will always be freed after the input device is unregistered. Signed-off-by: Michał Kępień <kernel@kempniu.pl> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')

0 files changed, 0 insertions, 0 deletions

/* Copyright (c) 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <rpc/rpc.h> #include <rpcsvc/nis.h> #define DEFAULT_TTL 43200 /* ** Some functions for parsing the -D param and NIS_DEFAULTS Environ */ static nis_name searchgroup (char *str) { char *cptr; int i; cptr = strstr (str, "group="); if (cptr == NULL) return NULL; cptr += 6; /* points to the begin of the group string */ i = 0; while (cptr[i] != '\0' && cptr[i] != ':') i++; if (i == 0) /* only "group=" ? */ return (nis_name) ""; return strndup (cptr, i); } static nis_name searchowner (char *str) { char *cptr; int i; cptr = strstr (str, "owner="); if (cptr == NULL) return NULL; cptr += 6; /* points to the begin of the owner string */ i = 0; while (cptr[i] != '\0' && cptr[i] != ':') i++; if (i == 0) /* only "owner=" ? */ return strdup (""); return strndup (cptr, i); } static u_long searchttl (char *str) { char buf[strlen (str) + 1]; char *cptr, *dptr; u_long time; int i; dptr = strstr (str, "ttl="); if (dptr == NULL) /* should (could) not happen */ return DEFAULT_TTL;; dptr += 4; /* points to the begin of the new ttl */ i = 0; while (dptr[i] != '\0' && dptr[i] != ':') i++; if (i == 0) /* only "ttl=" ? */ return DEFAULT_TTL; strncpy (buf, dptr, i); buf[i] = '\0'; time = 0; dptr = buf; cptr = strchr (dptr, 'd'); if (cptr != NULL) { *cptr = '\0'; cptr++; time += atoi (dptr) * 60 * 60 * 24; dptr = cptr; } cptr = strchr (dptr, 'h'); if (cptr != NULL) { *cptr = '\0'; cptr++; time += atoi (dptr) * 60 * 60; dptr = cptr; } cptr = strchr (dptr, 'm'); if (cptr != NULL) { *cptr = '\0'; cptr++; time += atoi (dptr) * 60; dptr = cptr; } cptr = strchr (dptr, 's'); if (cptr != NULL) *cptr = '\0'; time += atoi (dptr); return time; } static u_long searchaccess (char *str, u_long access) { char buf[strlen (str) + 1]; char *cptr; u_long result = access; int i; int n, o, g, w; cptr = strstr (str, "access="); if (cptr == NULL) return 0; cptr += 7; /* points to the begin of the access string */ i = 0; while (cptr[i] != '\0' && cptr[i] != ':') i++; if (i == 0) /* only "access=" ? */ return 0; strncpy (buf, cptr, i); buf[i] = '\0'; n = o = g = w = 0; cptr = buf; if (*cptr == ',') /* Fix for stupid Solaris scripts */ ++cptr; while (*cptr != '\0') { switch (*cptr) { case 'n': n = 1; break; case 'o': o = 1; break; case 'g': g = 1; break; case 'w': w = 1; break; case 'a': o = g = w = 1; break; case '-': cptr++; /* Remove "-" from beginning */ while (*cptr != '\0' && *cptr != ',') { switch (*cptr) { case 'r': if (n) result = result & ~(NIS_READ_ACC << 24); if (o) result = result & ~(NIS_READ_ACC << 16); if (g) result = result & ~(NIS_READ_ACC << 8); if (w) result = result & ~(NIS_READ_ACC); break; case 'm': if (n) result = result & ~(NIS_MODIFY_ACC << 24); if (o) result = result & ~(NIS_MODIFY_ACC << 16); if (g) result = result & ~(NIS_MODIFY_ACC << 8); if (w) result = result & ~(NIS_MODIFY_ACC); break; case 'c': if (n) result = result & ~(NIS_CREATE_ACC << 24); if (o) result = result & ~(NIS_CREATE_ACC << 16); if (g) result = result & ~(NIS_CREATE_ACC << 8); if (w) result = result & ~(NIS_CREATE_ACC); break; case 'd': if (n) result = result & ~(NIS_DESTROY_ACC << 24); if (o) result = result & ~(NIS_DESTROY_ACC << 16); if (g) result = result & ~(NIS_DESTROY_ACC << 8); if (w) result = result & ~(NIS_DESTROY_ACC); break; default: return ULONG_MAX; } cptr++; } n = o = g = w = 0; break; case '+': cptr++; /* Remove "+" from beginning */ while (*cptr != '\0' && *cptr != ',') { switch (*cptr) { case 'r': if (n) result = result | (NIS_READ_ACC << 24); if (o) result = result | (NIS_READ_ACC << 16); if (g) result = result | (NIS_READ_ACC << 8); if (w) result = result | (NIS_READ_ACC); break; case 'm': if (n) result = result | (NIS_MODIFY_ACC << 24); if (o) result = result | (NIS_MODIFY_ACC << 16); if (g) result = result | (NIS_MODIFY_ACC << 8); if (w) result = result | (NIS_MODIFY_ACC); break; case 'c': if (n) result = result | (NIS_CREATE_ACC << 24); if (o) result = result | (NIS_CREATE_ACC << 16); if (g) result = result | (NIS_CREATE_ACC << 8); if (w) result = result | (NIS_CREATE_ACC); break; case 'd': if (n) result = result | (NIS_DESTROY_ACC << 24); if (o) result = result | (NIS_DESTROY_ACC << 16); if (g) result = result | (NIS_DESTROY_ACC << 8); if (w) result = result | (NIS_DESTROY_ACC); break; default: return ULONG_MAX; } cptr++; } n = o = g = w = 0; break; case '=': cptr++; /* Remove "=" from beginning */ /* Clear */ if (n) result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC + NIS_CREATE_ACC + NIS_DESTROY_ACC) << 24); if (o) result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC + NIS_CREATE_ACC + NIS_DESTROY_ACC) << 16); if (g) result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC + NIS_CREATE_ACC + NIS_DESTROY_ACC) << 8); if (w) result = result & ~(NIS_READ_ACC + NIS_MODIFY_ACC + NIS_CREATE_ACC + NIS_DESTROY_ACC); while (*cptr != '\0' && *cptr != ',') { switch (*cptr) { case 'r': if (n) result = result | (NIS_READ_ACC << 24); if (o) result = result | (NIS_READ_ACC << 16); if (g) result = result | (NIS_READ_ACC << 8); if (w) result = result | (NIS_READ_ACC); break; case 'm': if (n) result = result | (NIS_MODIFY_ACC << 24); if (o) result = result | (NIS_MODIFY_ACC << 16); if (g) result = result | (NIS_MODIFY_ACC << 8); if (w) result = result | (NIS_MODIFY_ACC); break; case 'c': if (n) result = result | (NIS_CREATE_ACC << 24); if (o) result = result | (NIS_CREATE_ACC << 16); if (g) result = result | (NIS_CREATE_ACC << 8); if (w) result = result | (NIS_CREATE_ACC); break; case 'd': if (n) result = result | (NIS_DESTROY_ACC << 24); if (o) result = result | (NIS_DESTROY_ACC << 16); if (g) result = result | (NIS_DESTROY_ACC << 8); if (w) result = result | (NIS_DESTROY_ACC); break; default: return result = ULONG_MAX; } cptr++; } n = o = g = w = 0; break; default: return result = ULONG_MAX; } if (*cptr != '\0') cptr++; } return result; } nis_name __nis_default_owner (char *defaults) { char default_owner[NIS_MAXNAMELEN + 1]; char *cptr, *dptr; strcpy (default_owner, nis_local_principal ()); if (defaults != NULL) { dptr = strstr (defaults, "owner="); if (dptr != NULL) { char *p = searchowner (defaults); if (strlen (p) <= NIS_MAXNAMELEN) strcpy (default_owner, p); free (p); } } else { cptr = getenv ("NIS_DEFAULTS"); if (cptr != NULL) { dptr = strstr (cptr, "owner="); if (dptr != NULL) { char *p = searchowner (cptr); if (strlen (p) <= NIS_MAXNAMELEN) strcpy (default_owner, p); free (p); } } } return strdup (default_owner); } nis_name __nis_default_group (char *defaults) { char default_group[NIS_MAXNAMELEN + 1]; char *cptr, *dptr; strcpy (default_group, nis_local_group ()); if (defaults != NULL) { dptr = strstr (defaults, "group="); if (dptr != NULL) { char *p = searchgroup (defaults); if (strlen (p) <= NIS_MAXNAMELEN) strcpy (default_group, p); free (p); } } else { cptr = getenv ("NIS_DEFAULTS"); if (cptr != NULL) { dptr = strstr (cptr, "group="); if (dptr != NULL) { char *p = searchgroup (cptr); if (strlen (p) <= NIS_MAXNAMELEN) strcpy (default_group, p); free (p); } } } return strdup (default_group); } u_long __nis_default_ttl (char *defaults) { char *cptr, *dptr; if (defaults != NULL) { dptr = strstr (defaults, "ttl="); if (dptr != NULL) return searchttl (defaults); } cptr = getenv ("NIS_DEFAULTS"); if (cptr == NULL) return DEFAULT_TTL; dptr = strstr (cptr, "ttl="); if (dptr == NULL) return DEFAULT_TTL; return searchttl (cptr); } /* Default access rights are ----rmcdr---r---, but we could change this with the NIS_DEFAULTS variable. */ u_long __nis_default_access (char *param, u_long defaults) { u_long result; char *cptr; if (defaults == 0) result = 0 | OWNER_DEFAULT | GROUP_DEFAULT | WORLD_DEFAULT; else result = defaults; if (param != NULL && strstr (param, "access=") != NULL) result = searchaccess (param, result); else { cptr = getenv ("NIS_DEFAULTS"); if (cptr != NULL && strstr (cptr, "access=") != NULL) result = searchaccess (getenv ("NIS_DEFAULTS"), result); } return result; }


context:
space:
mode: