Products
Linux kernel
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Tags
CVE-2023-52749 details
Last Modified : May 21, 2024, 4:53 p.m.
Description
In the Linux kernel, the following vulnerability has been resolved: spi: Fix null dereference on suspend A race condition exists where a synchronous (noqueue) transfer can be active during a system suspend. This can cause a null pointer dereference exception to occur when the system resumes. Example order of events leading to the exception: 1. spi_sync() calls __spi_transfer_message_noqueue() which sets ctlr->cur_msg 2. Spi transfer begins via spi_transfer_one_message() 3. System is suspended interrupting the transfer context 4. System is resumed 6. spi_controller_resume() calls spi_start_queue() which resets cur_msg to NULL 7. Spi transfer context resumes and spi_finalize_current_message() is called which dereferences cur_msg (which is now NULL) Wait for synchronous transfers to complete before suspending by acquiring the bus mutex and setting/checking a suspend flag.
CVSS Score
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Weakness
Weakness | Name | Description |
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References
URL | Source |
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https://git.kernel.org/stable/c/4ec4508db97502a12daee88c74782e8d35ced068 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/96474ea47dc67b0704392d59192b233c8197db0e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/bef4a48f4ef798c4feddf045d49e53c8a97d5e37 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |