In the Linux kernel, the following vulnerability has been resolved:
dmaengine: fix NULL pointer in channel unregistration function
__dma_async_device_channel_register() can fail. In case of failure,
chan->local is freed (with free_percpu()), and chan->local is nullified.
When dma_async_device_unregister() is called (because of managed API or
intentionally by DMA controller driver), channels are unconditionally
unregistered, leading to this NULL pointer:
[ 1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0
[...]
[ 1.484499] Call trace:
[ 1.486930] device_del+0x40/0x394
[ 1.490314] device_unregister+0x20/0x7c
[ 1.494220] __dma_async_device_channel_unregister+0x68/0xc0
Look at dma_async_device_register() function error path, channel device
unregistration is done only if chan->local is not NULL.
Then add the same condition at the beginning of
__dma_async_device_channel_unregister() function, to avoid NULL pointer
issue whatever the API used to reach this function.
Metrics
Affected Vendors & Products
References
History
Wed, 13 Nov 2024 02:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
CPEs | cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
Wed, 06 Nov 2024 02:30:00 +0000
Type | Values Removed | Values Added |
---|---|---|
First Time appeared |
Redhat
Redhat enterprise Linux |
|
CPEs | cpe:/a:redhat:enterprise_linux:8::nfv cpe:/o:redhat:enterprise_linux:8 |
|
Vendors & Products |
Redhat
Redhat enterprise Linux |
Mon, 04 Nov 2024 13:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-02-29T15:52:10.499Z
Updated: 2024-11-06T19:02:52.592Z
Reserved: 2024-02-20T12:30:33.304Z
Link: CVE-2023-52492
Vulnrichment
Updated: 2024-08-02T23:03:19.973Z
NVD
Status : Awaiting Analysis
Published: 2024-03-11T18:15:16.877
Modified: 2024-11-06T19:35:03.290
Link: CVE-2023-52492
Redhat