The patch titled proc: fix the threaded /proc/self has been removed from the -mm tree. Its filename was proc-fix-the-threaded-proc-self.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: proc: fix the threaded /proc/self From: ebiederm@xxxxxxxxxxxx (Eric W. Biederman) Long ago when the CLONE_THREAD support first went it someone thought it would be wise to point /proc/self at /proc/<tgid> instead of /proc/<pid>. Given that /proc/<tgid> can return information about a very different task (if enough things have been unshared) then our current process /proc/<tgid> seems blatantly wrong. So far I have yet to think up an example where the current behavior would be advantageous, and I can see several places where it is seriously non-intuitive. We may be stuck with the current broken behavior for backwards compatibility reasons but lets try fixing our ancient bug for the 2.6.25 time frame and see if anyone screams. Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx> Acked-by: Ingo Molnar <mingo@xxxxxxx> Cc: "Guillaume Chazarain" <guichaz@xxxxxxxx> Cc: "Pavel Emelyanov" <xemul@xxxxxxxxxx> Cc: "Rafael J. Wysocki" <rjw@xxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Cc: Roland McGrath <roland@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/proc/base.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff -puN fs/proc/base.c~proc-fix-the-threaded-proc-self fs/proc/base.c --- a/fs/proc/base.c~proc-fix-the-threaded-proc-self +++ a/fs/proc/base.c @@ -2102,22 +2102,22 @@ static int proc_self_readlink(struct den int buflen) { struct pid_namespace *ns = dentry->d_sb->s_fs_info; - pid_t tgid = task_tgid_nr_ns(current, ns); + pid_t pid = task_pid_nr_ns(current, ns); char tmp[PROC_NUMBUF]; - if (!tgid) + if (!pid) return -ENOENT; - sprintf(tmp, "%d", tgid); + sprintf(tmp, "%d", pid); return vfs_readlink(dentry,buffer,buflen,tmp); } 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); + pid_t pid = task_pid_nr_ns(current, ns); char tmp[PROC_NUMBUF]; - if (!tgid) + if (!pid) return ERR_PTR(-ENOENT); - sprintf(tmp, "%d", task_tgid_nr_ns(current, ns)); + sprintf(tmp, "%d", pid); return ERR_PTR(vfs_follow_link(nd,tmp)); } _ Patches currently in -mm which might be from ebiederm@xxxxxxxxxxxx are origin.patch revert-proc-fix-the-threaded-proc-self.patch use-find_task_by_vpid-in-audit-code.patch ia64-fix-ptrace-inside-a-namespace.patch mips-use-find_task_by_vpid-in-system-calls.patch quirks-set-en-bit-of-msi-mapping-for-devices-onht-based-nvidia-platform.patch git-x86.patch deprecate-find_task_by_pid-kgdb.patch d_path-make-proc_get_link-use-a-struct-path-argument.patch use-find_task_by_vpid-in-taskstats.patch deprecate-find_task_by_pid.patch procfs-task-exe-symlink.patch procfs-task-exe-symlink-fix.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html