This is a note to let you know that I've just added the patch titled
Btrfs: fix NULL pointer crash of deleting a seed device
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-fix-null-pointer-crash-of-deleting-a-seed-device.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 29cc83f69c8338ff8fd1383c9be263d4bdf52d73 Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.li.liu@xxxxxxxxxx>
Date: Sun, 11 May 2014 23:14:59 +0800
Subject: Btrfs: fix NULL pointer crash of deleting a seed device
From: Liu Bo <bo.li.liu@xxxxxxxxxx>
commit 29cc83f69c8338ff8fd1383c9be263d4bdf52d73 upstream.
Same as normal devices, seed devices should be initialized with
fs_info->dev_root as well, otherwise we'll get a NULL pointer crash.
Cc: Chris Murphy <lists@xxxxxxxxxxxxxxxxx>
Reported-by: Chris Murphy <lists@xxxxxxxxxxxxxxxxx>
Signed-off-by: Liu Bo <bo.li.liu@xxxxxxxxxx>
Signed-off-by: Chris Mason <clm@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/volumes.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6080,10 +6080,14 @@ void btrfs_init_devices_late(struct btrf
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
- mutex_lock(&fs_devices->device_list_mutex);
- list_for_each_entry(device, &fs_devices->devices, dev_list)
- device->dev_root = fs_info->dev_root;
- mutex_unlock(&fs_devices->device_list_mutex);
+ while (fs_devices) {
+ mutex_lock(&fs_devices->device_list_mutex);
+ list_for_each_entry(device, &fs_devices->devices, dev_list)
+ device->dev_root = fs_info->dev_root;
+ mutex_unlock(&fs_devices->device_list_mutex);
+
+ fs_devices = fs_devices->seed;
+ }
}
static void __btrfs_reset_dev_stats(struct btrfs_device *dev)
Patches currently in stable-queue which might be from bo.li.liu@xxxxxxxxxx are
queue-3.15/btrfs-fix-null-pointer-crash-of-deleting-a-seed-device.patch
queue-3.15/btrfs-fix-scrub_print_warning-to-handle-skinny-metadata-extents.patch
queue-3.15/btrfs-use-right-type-to-get-real-comparison.patch
queue-3.15/btrfs-mark-mapping-with-error-flag-to-report-errors-to-userspace.patch
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