CVE - CVE-2024-46791

CVE-ID
CVE-2024-46791	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open The mcp251x_hw_wake() function is called with the mpc_lock mutex held and disables the interrupt handler so that no interrupts can be processed while waking the device. If an interrupt has already occurred then waiting for the interrupt handler to complete will deadlock because it will be trying to acquire the same mutex. CPU0 CPU1 ---- ---- mcp251x_open() mutex_lock(&priv->mcp_lock) request_threaded_irq() <interrupt> mcp251x_can_ist() mutex_lock(&priv->mcp_lock) mcp251x_hw_wake() disable_irq() <-- deadlock Use disable_irq_nosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/3a49b6b1caf5cefc05264d29079d52c99cb188e0 URL:https://git.kernel.org/stable/c/3a49b6b1caf5cefc05264d29079d52c99cb188e0 MISC:https://git.kernel.org/stable/c/513c8fc189b52f7922e36bdca58997482b198f0e URL:https://git.kernel.org/stable/c/513c8fc189b52f7922e36bdca58997482b198f0e MISC:https://git.kernel.org/stable/c/7dd9c26bd6cf679bcfdef01a8659791aa6487a29 URL:https://git.kernel.org/stable/c/7dd9c26bd6cf679bcfdef01a8659791aa6487a29 MISC:https://git.kernel.org/stable/c/8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7 URL:https://git.kernel.org/stable/c/8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7 MISC:https://git.kernel.org/stable/c/e554113a1cd2a9cfc6c7af7bdea2141c5757e188 URL:https://git.kernel.org/stable/c/e554113a1cd2a9cfc6c7af7bdea2141c5757e188 MISC:https://git.kernel.org/stable/c/f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646 URL:https://git.kernel.org/stable/c/f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646
Assigning CNA
kernel.org
Date Record Created
20240911	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240911)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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