diff options
| -rw-r--r-- | fs/proc/base.c | 31 |
1 files changed, 15 insertions, 16 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index bbcaef9adb57..20746e124409 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -185,6 +185,9 @@ enum pid_directory_inos { PROC_TID_FD_DIR = 0x8000, /* 0x8000-0xffff */ }; +/* Worst case buffer size needed for holding an integer. */ +#define PROC_NUMBUF 10 + struct pid_entry { int type; int len; @@ -807,12 +810,12 @@ static ssize_t oom_adjust_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { struct task_struct *task = proc_task(file->f_dentry->d_inode); - char buffer[8]; + char buffer[PROC_NUMBUF]; size_t len; int oom_adjust = task->oomkilladj; loff_t __ppos = *ppos; - len = sprintf(buffer, "%i\n", oom_adjust); + len = snprintf(buffer, sizeof(buffer), "%i\n", oom_adjust); if (__ppos >= len) return 0; if (count > len-__ppos) @@ -827,14 +830,14 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { struct task_struct *task = proc_task(file->f_dentry->d_inode); - char buffer[8], *end; + char buffer[PROC_NUMBUF], *end; int oom_adjust; if (!capable(CAP_SYS_RESOURCE)) return -EPERM; - memset(buffer, 0, 8); - if (count > 6) - count = 6; + memset(buffer, 0, sizeof(buffer)); + if (count > sizeof(buffer) - 1) + count = sizeof(buffer) - 1; if (copy_from_user(buffer, buf, count)) return -EFAULT; oom_adjust = simple_strtol(buffer, &end, 0); @@ -1099,8 +1102,6 @@ static struct inode_operations proc_pid_link_inode_operations = { .follow_link = proc_pid_follow_link }; -#define NUMBUF 10 - static int proc_readfd(struct file * filp, void * dirent, filldir_t filldir) { struct dentry *dentry = filp->f_dentry; @@ -1108,7 +1109,7 @@ static int proc_readfd(struct file * filp, void * dirent, filldir_t filldir) struct task_struct *p = proc_task(inode); unsigned int fd, tid, ino; int retval; - char buf[NUMBUF]; + char buf[PROC_NUMBUF]; struct files_struct * files; struct fdtable *fdt; @@ -1144,7 +1145,7 @@ static int proc_readfd(struct file * filp, void * dirent, filldir_t filldir) continue; rcu_read_unlock(); - j = NUMBUF; + j = PROC_NUMBUF; i = fd; do { j--; @@ -1153,7 +1154,7 @@ static int proc_readfd(struct file * filp, void * dirent, filldir_t filldir) } while (i); ino = fake_ino(tid, PROC_TID_FD_DIR + fd); - if (filldir(dirent, buf+j, NUMBUF-j, fd+2, ino, DT_LNK) < 0) { + if (filldir(dirent, buf+j, PROC_NUMBUF-j, fd+2, ino, DT_LNK) < 0) { rcu_read_lock(); break; } @@ -1828,14 +1829,14 @@ static struct inode_operations proc_tid_attr_inode_operations = { static int proc_self_readlink(struct dentry *dentry, char __user *buffer, int buflen) { - char tmp[30]; + char tmp[PROC_NUMBUF]; sprintf(tmp, "%d", current->tgid); return vfs_readlink(dentry,buffer,buflen,tmp); } static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd) { - char tmp[30]; + char tmp[PROC_NUMBUF]; sprintf(tmp, "%d", current->tgid); return ERR_PTR(vfs_follow_link(nd,tmp)); } @@ -1869,7 +1870,7 @@ static struct inode_operations proc_self_inode_operations = { void proc_flush_task(struct task_struct *task) { struct dentry *dentry, *leader, *dir; - char buf[30]; + char buf[PROC_NUMBUF]; struct qstr name; name.name = buf; @@ -2026,8 +2027,6 @@ out: return result; } -#define PROC_NUMBUF 10 - /* * Find the first tgid to return to user space. * |