[ Sasha's backport helper bot ] Hi, The upstream commit SHA1 provided is correct: fed13a5478680614ba97fc87e71f16e2e197912e WARNING: Author mismatch between patch and upstream commit: Backport author: Bin Lan <bin.lan.cn@xxxxxxxxxxxxx> Commit author: Mikulas Patocka <mpatocka@xxxxxxxxxx> Status in newer kernel trees: 6.12.y | Present (exact SHA1) 6.11.y | Present (different SHA1: d7aec2a06730) 6.6.y | Not found Note: The patch differs from the upstream commit: --- --- - 2024-11-27 09:24:16.233428906 -0500 +++ /tmp/tmp.Jz2z3Kr0Gz 2024-11-27 09:24:16.224663135 -0500 @@ -1,3 +1,5 @@ +[ Upstream commit fed13a5478680614ba97fc87e71f16e2e197912e ] + If blk_alloc_disk fails, the variable md->disk is set to an error value. cleanup_mapped_device will see that md->disk is non-NULL and it will attempt to access it, causing a crash on this statement @@ -8,23 +10,27 @@ Closes: https://marc.info/?l=dm-devel&m=172824125004329&w=2 Cc: stable@xxxxxxxxxxxxxxx Reviewed-by: Nitesh Shetty <nj.shetty@xxxxxxxxxxx> +Signed-off-by: Bin Lan <bin.lan.cn@xxxxxxxxxxxxx> --- drivers/md/dm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c -index ff4a6b570b764..19230404d8c2b 100644 +index 5dd0a42463a2..f45427291ea6 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c -@@ -2290,8 +2290,10 @@ static struct mapped_device *alloc_dev(int minor) +@@ -2077,8 +2077,10 @@ static struct mapped_device *alloc_dev(int minor) * override accordingly. */ - md->disk = blk_alloc_disk(NULL, md->numa_node_id); -- if (IS_ERR(md->disk)) -+ if (IS_ERR(md->disk)) { + md->disk = blk_alloc_disk(md->numa_node_id); +- if (!md->disk) ++ if (!md->disk){ + md->disk = NULL; goto bad; + } md->queue = md->disk->queue; init_waitqueue_head(&md->wait); +-- +2.34.1 + --- Results of testing on various branches: | Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.6.y | Success | Success |
