Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b07e35f94a7b6a059f889b904529ee907dc0634d
Commit: b07e35f94a7b6a059f889b904529ee907dc0634d
Parent: 5d540fb71552b9f2c542bea967200c48be2d8ef6
Author: Oleg Nesterov <[EMAIL PROTECTED]>
AuthorDate: Thu Aug 30 23:56:27 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Aug 31 01:42:22 2007 -0700
setpgid(child) fails if the child was forked by sub-thread
Spotted by Marcin Kowalczyk <[EMAIL PROTECTED]>.
sys_setpgid(child) fails if the child was forked by sub-thread.
Fix the "is it our child" check. The previous commit
ee0acf90d320c29916ba8c5c1b2e908d81f5057d was not complete.
(this patch asks for the new same_thread_group() helper, but mainline
doesn't
have it yet).
Signed-off-by: Oleg Nesterov <[EMAIL PROTECTED]>
Acked-by: Roland McGrath <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Tested-by: "Marcin 'Qrczak' Kowalczyk" <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
kernel/sys.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/kernel/sys.c b/kernel/sys.c
index 449b81b..1b33b05 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1442,7 +1442,6 @@ asmlinkage long sys_times(struct tms __user * tbuf)
* Auch. Had to add the 'did_exec' flag to conform completely to POSIX.
* LBT 04.03.94
*/
-
asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
{
struct task_struct *p;
@@ -1470,7 +1469,7 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
if (!thread_group_leader(p))
goto out;
- if (p->real_parent == group_leader) {
+ if (p->real_parent->tgid == group_leader->tgid) {
err = -EPERM;
if (task_session(p) != task_session(group_leader))
goto out;
-
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