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authorAl Viro <viro@zeniv.linux.org.uk>2008-04-22 05:11:59 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2008-04-25 09:23:53 -0400
commitfd8328be874f4190a811c58cd4778ec2c74d2c05 (patch)
treeb44ae8e99ce96a1a4739b04d4d1a23c40ab8b163 /kernel
parent6b335d9c80d7f3c2a3f6545f664ae9007a0f3821 (diff)
[PATCH] sanitize handling of shared descriptor tables in failing execve()
* unshare_files() can fail; doing it after irreversible actions is wrong and de_thread() is certainly irreversible. * since we do it unconditionally anyway, we might as well do it in do_execve() and save ourselves the PITA in binfmt handlers, etc. * while we are at it, binfmt_som actually leaked files_struct on failure. As a side benefit, unshare_files(), put_files_struct() and reset_files_struct() become unexported. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c3
-rw-r--r--kernel/fork.c2
2 files changed, 0 insertions, 5 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index cece89f80ab4..3d320003cc03 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -507,8 +507,6 @@ void put_files_struct(struct files_struct *files)
}
}
-EXPORT_SYMBOL(put_files_struct);
-
void reset_files_struct(struct task_struct *tsk, struct files_struct *files)
{
struct files_struct *old;
@@ -519,7 +517,6 @@ void reset_files_struct(struct task_struct *tsk, struct files_struct *files)
task_unlock(tsk);
put_files_struct(old);
}
-EXPORT_SYMBOL(reset_files_struct);
void exit_files(struct task_struct *tsk)
{
diff --git a/kernel/fork.c b/kernel/fork.c
index 76f05a08062b..2fc11f2e2b21 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -870,8 +870,6 @@ int unshare_files(void)
return error;
}
-EXPORT_SYMBOL(unshare_files);
-
static int copy_sighand(unsigned long clone_flags, struct task_struct *tsk)
{
struct sighand_struct *sig;