On Thu, Sep 23, 2021 at 10:18:14PM +0800, Cheng Chao wrote:
> Fixes: commit e7f63771b60e ("ION: Sys_heap: Add cached pool to spead up
> cached buffer alloc")
> the commit e7f63771b60e introduced the bug which didn't test page which maybe
> NULL.
> and previous logic was right.
>
> the e7f63771b6
Fixes: commit e7f63771b60e ("ION: Sys_heap: Add cached pool to spead up cached
buffer alloc")
the commit e7f63771b60e introduced the bug which didn't test page which maybe
NULL.
and previous logic was right.
the e7f63771b60e has been merged in v4.8-rc3, only longterm 4.9.x has this bug,
and othe
Fixes: commit e7f63771b60e ("ION: Sys_heap: Add cached pool to spead up cached
buffer alloc")
the commit e7f63771b60e introduced the bug which didn't test page which maybe
NULL.
and previous logic was right.
the e7f63771b60e has been merged in v4.8-rc3, only longterm 4.9.x has this bug,
and othe
On Wed, Sep 22, 2021 at 08:17:15PM +0800, Cheng Chao wrote:
> I notice that v4.9.283 has released, but this patch is not merged.
> It's exactly a bug.
Can you please resend this and include all of the information in this
thread in the changelog comment explaining why this is only needed for
this o
I notice that v4.9.283 has released, but this patch is not merged.
It's exactly a bug.
On Sat, Sep 11, 2021 at 10:40 PM Cheng Chao wrote:
>
> the bug has been introduced by the patch:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/staging/android/ion/ion_s
the bug has been introduced by the patch:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/staging/android/ion/ion_system_heap.c?h=v4.9.282&id=e7f63771b60e7802c5a9b437c5ab1a8e33a0bb35
On Sat, Sep 11, 2021 at 10:20 PM Cheng Chao wrote:
>
> for longterm v4.4.283,
for longterm v4.4.283, the code has checked if (!page)
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/staging/android/ion/ion_system_heap.c?h=v4.4.283
static struct page *alloc_buffer_page(struct ion_system_heap *heap,
struct ion_buffer *buffer,
unsign
On Sat, Sep 11, 2021 at 07:21:15PM +0800, Cheng Chao wrote:
> kernel panic is here:
>
> Unable to handle kernel paging request at virtual address b038
> pgd = d9d94000
> [b038] *pgd=
> Internal error: Oops: 2805 [#1] PREEMPT SMP ARM
> ...
> task: daa2dd00 task.stack: da194000
> PC
kernel panic is here:
Unable to handle kernel paging request at virtual address b038
pgd = d9d94000
[b038] *pgd=
Internal error: Oops: 2805 [#1] PREEMPT SMP ARM
...
task: daa2dd00 task.stack: da194000
PC is at v7_dma_clean_range+0x1c/0x34
LR is at arm_dma_sync_single_for_device+0x4
