From: Greg Kroah-Hartman Date: Fri, 15 May 2026 15:40:48 +0000 (+0200) Subject: 5.10-stable patches X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a90b000752da8a5ce84385c33fd3c02e059f9d0b;p=thirdparty%2Fkernel%2Fstable-queue.git 5.10-stable patches added patches: bcache-fix-uninitialized-closure-object.patch --- diff --git a/queue-5.10/bcache-fix-uninitialized-closure-object.patch b/queue-5.10/bcache-fix-uninitialized-closure-object.patch new file mode 100644 index 0000000000..6c3f8349a6 --- /dev/null +++ b/queue-5.10/bcache-fix-uninitialized-closure-object.patch @@ -0,0 +1,42 @@ +From 20a8e451ec1c7e99060b1bbaaad03ce88c39ddb8 Mon Sep 17 00:00:00 2001 +From: Mingzhe Zou +Date: Fri, 3 Apr 2026 12:21:35 +0800 +Subject: bcache: fix uninitialized closure object + +From: Mingzhe Zou + +commit 20a8e451ec1c7e99060b1bbaaad03ce88c39ddb8 upstream. + +In the previous patch ("bcache: fix cached_dev.sb_bio use-after-free and +crash"), we adopted a simple modification suggestion from AI to fix the +use-after-free. + +But in actual testing, we found an extreme case where the device is +stopped before calling bch_write_bdev_super(). + +At this point, struct closure sb_write has not been initialized yet. +For this patch, we ensure that sb_bio has been completed via +sb_write_mutex. + +Signed-off-by: Mingzhe Zou +Signed-off-by: Coly Li +Link: https://patch.msgid.link/20260403042135.2221247-1-colyli@fnnas.com +Fixes: fec114a98b87 ("bcache: fix cached_dev.sb_bio use-after-free and crash") +Signed-off-by: Jens Axboe +Signed-off-by: Greg Kroah-Hartman +--- + drivers/md/bcache/super.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +--- a/drivers/md/bcache/super.c ++++ b/drivers/md/bcache/super.c +@@ -1401,7 +1401,8 @@ static void cached_dev_free(struct closu + * The sb_bio is embedded in struct cached_dev, so we must + * ensure no I/O is in progress. + */ +- closure_sync(&dc->sb_write); ++ down(&dc->sb_write_mutex); ++ up(&dc->sb_write_mutex); + + if (dc->sb_disk) + put_page(virt_to_page(dc->sb_disk)); diff --git a/queue-5.10/series b/queue-5.10/series index aa34eb25d0..a5227af5d4 100644 --- a/queue-5.10/series +++ b/queue-5.10/series @@ -292,3 +292,4 @@ batman-adv-bla-put-backbone-reference-on-failed-claim-hash-insert.patch bluetooth-l2cap-fix-null-ptr-deref-in-l2cap_sock_get_sndtimeo_cb.patch vsock-fix-buffer-size-clamping-order.patch vsock-virtio-fix-accept-queue-count-leak-on-transport-mismatch.patch +bcache-fix-uninitialized-closure-object.patch