diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2021-3347/0008-futex-Use-pi_state_update_owner-in-put_pi_state.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2021-3347/0008-futex-Use-pi_state_update_owner-in-put_pi_state.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2021-3347/0008-futex-Use-pi_state_update_owner-in-put_pi_state.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2021-3347/0008-futex-Use-pi_state_update_owner-in-put_pi_state.patch new file mode 100644 index 000000000..cfff74b57 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/CVE-2021-3347/0008-futex-Use-pi_state_update_owner-in-put_pi_state.patch @@ -0,0 +1,42 @@ +From a3155c362ca0a4677d0c886798bbeb5f0a9efe86 Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Wed, 20 Jan 2021 11:35:19 +0100 +Subject: [PATCH] futex: Use pi_state_update_owner() in put_pi_state() + +commit 6ccc84f917d33312eb2846bd7b567639f585ad6d upstream + +No point in open coding it. This way it gains the extra sanity checks. + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> +Cc: stable@vger.kernel.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + kernel/futex.c | 8 +------- + 1 file changed, 1 insertion(+), 7 deletions(-) + +diff --git a/kernel/futex.c b/kernel/futex.c +index 8175bdce7267..758deac71345 100644 +--- a/kernel/futex.c ++++ b/kernel/futex.c +@@ -902,16 +902,10 @@ static void put_pi_state(struct futex_pi_state *pi_state) + * and has cleaned up the pi_state already + */ + if (pi_state->owner) { +- struct task_struct *owner; + unsigned long flags; + + raw_spin_lock_irqsave(&pi_state->pi_mutex.wait_lock, flags); +- owner = pi_state->owner; +- if (owner) { +- raw_spin_lock(&owner->pi_lock); +- list_del_init(&pi_state->list); +- raw_spin_unlock(&owner->pi_lock); +- } ++ pi_state_update_owner(pi_state, NULL); + rt_mutex_proxy_unlock(&pi_state->pi_mutex); + raw_spin_unlock_irqrestore(&pi_state->pi_mutex.wait_lock, flags); + } +-- +2.17.1 + |