1 files changed, 0 insertions, 52 deletions
diff --git a/debian/patches-rt/0291-signal-Prevent-double-free-of-user-struct.patch b/debian/patches-rt/0291-signal-Prevent-double-free-of-user-struct.patch
deleted file mode 100644
index b1126edd9..000000000
--- a/debian/patches-rt/0291-signal-Prevent-double-free-of-user-struct.patch
+++ /dev/null
@@ -1,52 +0,0 @@
-From a8bcbfba872add3e24d04edfc9a0821dda254e5f Mon Sep 17 00:00:00 2001
-From: Matt Fleming <matt@codeblueprint.co.uk>
-Date: Tue, 7 Apr 2020 10:54:13 +0100
-Subject: [PATCH 291/296] signal: Prevent double-free of user struct
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.35-rt39.tar.xz
-
-The way user struct reference counting works changed significantly with,
-
-  fda31c50292a ("signal: avoid double atomic counter increments for user accounting")
-
-Now user structs are only freed once the last pending signal is
-dequeued. Make sigqueue_free_current() follow this new convention to
-avoid freeing the user struct multiple times and triggering this
-warning:
-
- refcount_t: underflow; use-after-free.
- WARNING: CPU: 0 PID: 6794 at lib/refcount.c:288 refcount_dec_not_one+0x45/0x50
- Call Trace:
-  refcount_dec_and_lock_irqsave+0x16/0x60
-  free_uid+0x31/0xa0
-  __dequeue_signal+0x17c/0x190
-  dequeue_signal+0x5a/0x1b0
-  do_sigtimedwait+0x208/0x250
-  __x64_sys_rt_sigtimedwait+0x6f/0xd0
-  do_syscall_64+0x72/0x200
-  entry_SYSCALL_64_after_hwframe+0x49/0xbe
-
-Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
-Reported-by: Daniel Wagner <wagi@monom.org>
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
----
- kernel/signal.c | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/kernel/signal.c b/kernel/signal.c
-index bad7873f8949..0be3c40c5662 100644
---- a/kernel/signal.c
-+++ b/kernel/signal.c
-@@ -495,8 +495,8 @@ static void sigqueue_free_current(struct sigqueue *q)
- 
- 	up = q->user;
- 	if (rt_prio(current->normal_prio) && !put_task_cache(current, q)) {
--		atomic_dec(&up->sigpending);
--		free_uid(up);
-+		if (atomic_dec_and_test(&up->sigpending))
-+			free_uid(up);
- 	} else
- 		  __sigqueue_free(q);
- }
--- 
-2.30.2
-