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authorKees Cook <keescook@chromium.org>2018-04-10 16:34:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-11 10:28:37 -0700
commitb83838313386f617d6bd8201be7f5b532059bba1 (patch)
treed38c1ea9433292b4a33efe3d3fad48bf8fb1f314 /fs/exec.c
parent8f2af155b513583e8b149a384551f13e1ac5dc72 (diff)
downloadlinux-b83838313386f617d6bd8201be7f5b532059bba1.tar.bz2
exec: introduce finalize_exec() before start_thread()
Provide a final callback into fs/exec.c before start_thread() takes over, to handle any last-minute changes, like the coming restoration of the stack limit. Link: http://lkml.kernel.org/r/1518638796-20819-3-git-send-email-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Ben Hutchings <ben.hutchings@codethink.co.uk> Cc: Brad Spengler <spender@grsecurity.net> Cc: Greg KH <greg@kroah.com> Cc: Hugh Dickins <hughd@google.com> Cc: "Jason A. Donenfeld" <Jason@zx2c4.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Willy Tarreau <w@1wt.eu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index f4469ab88c7a..422ad79a7a03 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1384,6 +1384,12 @@ void setup_new_exec(struct linux_binprm * bprm)
}
EXPORT_SYMBOL(setup_new_exec);
+/* Runs immediately before start_thread() takes over. */
+void finalize_exec(struct linux_binprm *bprm)
+{
+}
+EXPORT_SYMBOL(finalize_exec);
+
/*
* Prepare credentials and lock ->cred_guard_mutex.
* install_exec_creds() commits the new creds and drops the lock.