This patch series backports the minimum set of changes in order to fix
this warning that popped up with >= 5.4.284 stable kernels:
In file included from ./include/linux/mm.h:29,
from ./include/linux/pagemap.h:8,
from ./include/linux/buffer_head.h:14,
from fs/udf/udfdecl.h:12,
from fs/udf/super.c:41:
fs/udf/super.c: In function 'udf_fill_partdesc_info':
./include/linux/overflow.h:70:15: warning: comparison of distinct pointer types lacks a cast
(void) (&__a == &__b); \
^~
fs/udf/super.c:1162:7: note: in expansion of macro 'check_add_overflow'
if (check_add_overflow(map->s_partition_len,
^~~~~~~~~~~~~~~~~~
Changes in v2:
- added missing upstream commit ID to the last patch in the series
Kees Cook (2):
overflow: Add __must_check attribute to check_*() helpers
overflow: Allow mixed type arguments
Keith Busch (1):
overflow: Correct check_shl_overflow() comment
include/linux/overflow.h | 101 +++++++++++++++++++++++----------------
1 file changed, 60 insertions(+), 41 deletions(-)
--
2.34.1
No upstream commit exists for this commit.
The issue was introduced with backporting upstream commit 091c1dd2d4df
("mm/mempolicy: fix migrate_to_node() assuming there is at least one VMA
in a MM").
The backport incorrectly added unlock logic to a path where
mmap_lock was provided by external context in do_migrate_pages(),
creating lock imbalance when no VMAs are found.
This fixes the report:
WARNING: bad unlock balance detected!
6.6.79 #1 Not tainted
-------------------------------------
repro/9655 is trying to release lock (&mm->mmap_lock) at:
[<ffffffff81daa36f>] mmap_read_unlock include/linux/mmap_lock.h:173 [inline]
[<ffffffff81daa36f>] do_migrate_pages+0x59f/0x700 mm/mempolicy.c:1196
but there are no more locks to release!
other info that might help us debug this:
no locks held by repro/9655.
stack backtrace:
CPU: 1 PID: 9655 Comm: a Not tainted 6.6.79 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd5/0x1b0 lib/dump_stack.c:106
__lock_release kernel/locking/lockdep.c:5431 [inline]
lock_release+0x4b1/0x680 kernel/locking/lockdep.c:5774
up_read+0x12/0x20 kernel/locking/rwsem.c:1615
mmap_read_unlock include/linux/mmap_lock.h:173 [inline]
do_migrate_pages+0x59f/0x700 mm/mempolicy.c:1196
kernel_migrate_pages+0x59b/0x780 mm/mempolicy.c:1665
__do_sys_migrate_pages mm/mempolicy.c:1684 [inline]
__se_sys_migrate_pages mm/mempolicy.c:1680 [inline]
__x64_sys_migrate_pages+0x92/0xf0 mm/mempolicy.c:1680
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x34/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Fixes: a13b2b9b0b0b ("mm/mempolicy: fix migrate_to_node() assuming there is at least one VMA in a MM")
Signed-off-by: Alexey Panov <apanov(a)astralinux.ru>
---
v2: Clarify mmap_lock context in commit description. Fix braces for a
single statement block. Add empty line after VM_BUG_ON to look more
consistent with upstream.
mm/mempolicy.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 94c74c594d10..d2855507d2e9 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1070,11 +1070,10 @@ static long migrate_to_node(struct mm_struct *mm, int source, int dest,
node_set(source, nmask);
VM_BUG_ON(!(flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)));
+
vma = find_vma(mm, 0);
- if (unlikely(!vma)) {
- mmap_read_unlock(mm);
+ if (unlikely(!vma))
return 0;
- }
/*
* This does not migrate the range, but isolates all pages that
--
2.30.2
The internal microphone on the Lenovo ThinkPad E16 model requires a
quirk entry to work properly. This was fixed in a previous patch (linked
below), but depending on the specific variant of the model, the product
name may be "21M5" or "21M6".
The following patch fixed this issue for the 21M5 variant:
https://lore.kernel.org/all/20240725065442.9293-1-tiwai@suse.de/
This patch adds support for the microphone on the 21M6 variant.
Link: https://github.com/ramaureirac/thinkpad-e14-linux/issues/31
Cc: <stable(a)vger.kernel.org>
Signed-off-by: Thomas Mizrahi <thomasmizra(a)gmail.com>
---
I recently acquired a ThinkPad E16 Gen 2 AMD and could not get the internal
microphone working. After some research, I discovered this issue. Since my
machine is a 21M6 variant, the required quirk was not applied by the
existing patch. After applying this patch and testing on my machine, the
microphone was immediately recognized and worked without further issues.
sound/soc/amd/yc/acp6x-mach.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/sound/soc/amd/yc/acp6x-mach.c b/sound/soc/amd/yc/acp6x-mach.c
index b16587d8f97a..a7637056972a 100644
--- a/sound/soc/amd/yc/acp6x-mach.c
+++ b/sound/soc/amd/yc/acp6x-mach.c
@@ -248,6 +248,13 @@ static const struct dmi_system_id yc_acp_quirk_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "21M5"),
}
},
+ {
+ .driver_data = &acp6x_card,
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "21M6"),
+ }
+ },
{
.driver_data = &acp6x_card,
.matches = {
--
2.48.1