diff options
| author | Tony Lindgren <tony@atomide.com> | 2010-03-01 23:19:05 +0100 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-03-01 23:19:05 +0100 |
| commit | d702d12167a2c05a346f49aac7a311d597762495 (patch) | |
| tree | baae42c299cce34d6df24b5d01f8b1d0b481bd9a /fs/proc/base.c | |
| parent | omap2: Initialize Menelaus and MMC for N8X0 (diff) | |
| parent | Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm (diff) | |
| download | linux-d702d12167a2c05a346f49aac7a311d597762495.tar.xz linux-d702d12167a2c05a346f49aac7a311d597762495.zip | |
Merge with mainline to remove plat-omap/Kconfig conflict
Conflicts:
arch/arm/plat-omap/Kconfig
Diffstat (limited to 'fs/proc/base.c')
| -rw-r--r-- | fs/proc/base.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index e42bbd843ed1..623e2ffb5d2b 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1095,8 +1095,12 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf, if (!capable(CAP_AUDIT_CONTROL)) return -EPERM; - if (current != pid_task(proc_pid(inode), PIDTYPE_PID)) + rcu_read_lock(); + if (current != pid_task(proc_pid(inode), PIDTYPE_PID)) { + rcu_read_unlock(); return -EPERM; + } + rcu_read_unlock(); if (count >= PAGE_SIZE) count = PAGE_SIZE - 1; @@ -2369,16 +2373,30 @@ static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd) { struct pid_namespace *ns = dentry->d_sb->s_fs_info; pid_t tgid = task_tgid_nr_ns(current, ns); - char tmp[PROC_NUMBUF]; - if (!tgid) - return ERR_PTR(-ENOENT); - sprintf(tmp, "%d", task_tgid_nr_ns(current, ns)); - return ERR_PTR(vfs_follow_link(nd,tmp)); + char *name = ERR_PTR(-ENOENT); + if (tgid) { + name = __getname(); + if (!name) + name = ERR_PTR(-ENOMEM); + else + sprintf(name, "%d", tgid); + } + nd_set_link(nd, name); + return NULL; +} + +static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd, + void *cookie) +{ + char *s = nd_get_link(nd); + if (!IS_ERR(s)) + __putname(s); } static const struct inode_operations proc_self_inode_operations = { .readlink = proc_self_readlink, .follow_link = proc_self_follow_link, + .put_link = proc_self_put_link, }; /* |