Resubmitted with
1. upstream sha1 line
2. explanation for why the backport differs from mainline
3. signoff
On Mon, May 13, 2024 at 1:53 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Mon, May 13, 2024 at 12:20:24PM -0700, Jeremy Bongio wrote:
> > From: Li Nan <linan122@xxxxxxxxxx>
> >
> > If kobject_add() is fail in bind_rdev_to_array(), 'rdev->serial' will be
> > alloc not be freed, and kmemleak occurs.
> >
> > unreferenced object 0xffff88815a350000 (size 49152):
> > comm "mdadm", pid 789, jiffies 4294716910
> > hex dump (first 32 bytes):
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
> > backtrace (crc f773277a):
> > [<0000000058b0a453>] kmemleak_alloc+0x61/0xe0
> > [<00000000366adf14>] __kmalloc_large_node+0x15e/0x270
> > [<000000002e82961b>] __kmalloc_node.cold+0x11/0x7f
> > [<00000000f206d60a>] kvmalloc_node+0x74/0x150
> > [<0000000034bf3363>] rdev_init_serial+0x67/0x170
> > [<0000000010e08fe9>] mddev_create_serial_pool+0x62/0x220
> > [<00000000c3837bf0>] bind_rdev_to_array+0x2af/0x630
> > [<0000000073c28560>] md_add_new_disk+0x400/0x9f0
> > [<00000000770e30ff>] md_ioctl+0x15bf/0x1c10
> > [<000000006cfab718>] blkdev_ioctl+0x191/0x3f0
> > [<0000000085086a11>] vfs_ioctl+0x22/0x60
> > [<0000000018b656fe>] __x64_sys_ioctl+0xba/0xe0
> > [<00000000e54e675e>] do_syscall_64+0x71/0x150
> > [<000000008b0ad622>] entry_SYSCALL_64_after_hwframe+0x6c/0x74
> >
> > Fixes: 963c555e75b0 ("md: introduce mddev_create/destroy_wb_pool for the change of member device")
> > Signed-off-by: Li Nan <linan122@xxxxxxxxxx>
> > Signed-off-by: Song Liu <song@xxxxxxxxxx>
> > Link: https://lore.kernel.org/r/20240208085556.2412922-1-linan666@xxxxxxxxxxxxxxx
> > Change-Id: Icc4960dcaffedc663797e2d8b18a24c23e201932
> > ---
> > drivers/md/md.c | 1 +
> > 1 file changed, 1 insertion(+)
>
>
> <formletter>
>
> This is not the correct way to submit patches for inclusion in the
> stable kernel tree. Please read:
> https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
> for how to do this properly.
>
> </formletter>
