The patch titled
simply fix first_tgid
has been removed from the -mm tree. Its filename is
proc-remove-tasklist_lock-from-proc_pid_readdir-simply-fix-first_tgid.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: simply fix first_tgid
From: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Like the bug Oleg spotted in first_tid there was also a small off by one
error in first_tgid, when a seek was done on the /proc directory. This
fixes that and changes the code structure to make it a little more obvious
what is going on.
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/proc/base.c | 28 +++++++++++++---------------
1 file changed, 13 insertions(+), 15 deletions(-)
diff -puN fs/proc/base.c~proc-remove-tasklist_lock-from-proc_pid_readdir-simply-fix-first_tgid fs/proc/base.c
--- a/fs/proc/base.c~proc-remove-tasklist_lock-from-proc_pid_readdir-simply-fix-first_tgid
+++ a/fs/proc/base.c
@@ -2040,34 +2040,32 @@ out:
* In the case of a seek we start with &init_task and walk nr
* threads past it.
*/
-static struct task_struct *first_tgid(int tgid, int nr)
+static struct task_struct *first_tgid(int tgid, unsigned int nr)
{
- struct task_struct *pos = NULL;
+ struct task_struct *pos;
rcu_read_lock();
if (tgid && nr) {
pos = find_task_by_pid(tgid);
- if (pos && !thread_group_leader(pos))
- pos = NULL;
- if (pos)
- nr = 0;
+ if (pos && thread_group_leader(pos))
+ goto found;
}
/* If nr exceeds the number of processes get out quickly */
+ pos = NULL;
if (nr && nr >= nr_processes())
goto done;
/* If we haven't found our starting place yet start with
* the init_task and walk nr tasks forward.
*/
- if (!pos && (nr >= 0))
- pos = next_task(&init_task);
-
- for (; pos && pid_alive(pos); pos = next_task(pos)) {
- if (--nr > 0)
- continue;
- get_task_struct(pos);
- goto done;
+ for (pos = next_task(&init_task); nr > 0; --nr) {
+ pos = next_task(pos);
+ if (pos == &init_task) {
+ pos = NULL;
+ goto done;
+ }
}
- pos = NULL;
+found:
+ get_task_struct(pos);
done:
rcu_read_unlock();
return pos;
_
Patches currently in -mm which might be from ebiederm@xxxxxxxxxxxx are
origin.patch
powerpc-adding-the-use-of-the-firmware-soft-reset-nmi-to-kdump.patch
proc-sysctl-add-_proc_do_string-helper.patch
namespaces-add-nsproxy.patch
namespaces-add-nsproxy-dont-include-compileh.patch
namespaces-incorporate-fs-namespace-into-nsproxy.patch
namespaces-utsname-introduce-temporary-helpers.patch
namespaces-utsname-switch-to-using-uts-namespaces.patch
namespaces-utsname-switch-to-using-uts-namespaces-alpha-fix.patch
namespaces-utsname-switch-to-using-uts-namespaces-cleanup.patch
namespaces-utsname-use-init_utsname-when-appropriate.patch
namespaces-utsname-use-init_utsname-when-appropriate-cifs-update.patch
namespaces-utsname-implement-utsname-namespaces.patch
namespaces-utsname-implement-utsname-namespaces-export.patch
namespaces-utsname-implement-utsname-namespaces-dont-include-compileh.patch
namespaces-utsname-sysctl-hack.patch
namespaces-utsname-sysctl-hack-cleanup.patch
namespaces-utsname-sysctl-hack-cleanup-2.patch
namespaces-utsname-sysctl-hack-cleanup-2-fix.patch
namespaces-utsname-remove-system_utsname.patch
namespaces-utsname-implement-clone_newuts-flag.patch
uts-copy-nsproxy-only-when-needed.patch
ipc-namespace-core-fix.patch
ipc-namespace-core-unshare-fix.patch
ipc-namespace-utils-compilation-fix.patch
genirq-irq-document-what-an-irq-is.patch
-
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