Re: [GIT PULL] timer fixes
From: Borislav Petkov
Date: Sat Aug 13 2022 - 12:25:18 EST
Might wanna hold off on pulling that:
On Sat, Aug 13, 2022 at 12:25:51PM +0200, Ingo Molnar wrote:
> Linus,
>
> Please pull the latest timers/urgent git tree from:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers-urgent-2022-08-13
>
> # HEAD: e362359ace6f87c201531872486ff295df306d13 posix-cpu-timers: Cleanup CPU timers before freeing them during exec
...
> Thadeu Lima de Souza Cascardo (1):
> posix-cpu-timers: Cleanup CPU timers before freeing them during exec
...
> diff --git a/fs/exec.c b/fs/exec.c
> index 5fd73915c62c..f793221f4eb6 100644
> --- a/fs/exec.c
> +++ b/fs/exec.c
> @@ -1304,6 +1304,9 @@ int begin_new_exec(struct linux_binprm * bprm)
> bprm->mm = NULL;
>
> #ifdef CONFIG_POSIX_TIMERS
> + spin_lock_irq(&me->sighand->siglock);
> + posix_cpu_timers_exit(me);
> + spin_unlock_irq(&me->sighand->siglock);
sparse is not happy about this:
https://lore.kernel.org/r/202208140040.MMi4z6Ek-lkp@xxxxxxxxx
That task_struct.sighand is marked __rcu and thus noderef and sparse
complains:
fs/exec.c:1307:26: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock
+@@ got struct spinlock [noderef] __rcu * @@
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette