CVE - CVE-2024-26999

CVE-ID
CVE-2024-26999	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: serial/pmac_zilog: Remove flawed mitigation for rx irq flood The mitigation was intended to stop the irq completely. That may be better than a hard lock-up but it turns out that you get a crash anyway if you're using pmac_zilog as a serial console: ttyPZ0: pmz: rx irq flood ! BUG: spinlock recursion on CPU#0, swapper/0 That's because the pr_err() call in pmz_receive_chars() results in pmz_console_write() attempting to lock a spinlock already locked in pmz_interrupt(). With CONFIG_DEBUG_SPINLOCK=y, this produces a fatal BUG splat. The spinlock in question is the one in struct uart_port. Even when it's not fatal, the serial port rx function ceases to work. Also, the iteration limit doesn't play nicely with QEMU, as can be seen in the bug report linked below. A web search for other reports of the error message "pmz: rx irq flood" didn't produce anything. So I don't think this code is needed any more. Remove it.
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/1be3226445362bfbf461c92a5bcdb1723f2e4907 URL:https://git.kernel.org/stable/c/1be3226445362bfbf461c92a5bcdb1723f2e4907 MISC:https://git.kernel.org/stable/c/52aaf1ff14622a04148dbb9ccce6d9de5d534ea7 URL:https://git.kernel.org/stable/c/52aaf1ff14622a04148dbb9ccce6d9de5d534ea7 MISC:https://git.kernel.org/stable/c/69a02273e288011b521ee7c1f3ab2c23fda633ce URL:https://git.kernel.org/stable/c/69a02273e288011b521ee7c1f3ab2c23fda633ce MISC:https://git.kernel.org/stable/c/7a3bbe41efa55323b6ea3c35fa15941d4dbecdef URL:https://git.kernel.org/stable/c/7a3bbe41efa55323b6ea3c35fa15941d4dbecdef MISC:https://git.kernel.org/stable/c/ab86cf6f8d24e63e9aca23da5108af1aa5483928 URL:https://git.kernel.org/stable/c/ab86cf6f8d24e63e9aca23da5108af1aa5483928 MISC:https://git.kernel.org/stable/c/bbaafbb4651fede8d3c3881601ecaa4f834f9d3f URL:https://git.kernel.org/stable/c/bbaafbb4651fede8d3c3881601ecaa4f834f9d3f MISC:https://git.kernel.org/stable/c/ca09dfc3cfdf89e6af3ac24e1c6c0be5c575a729 URL:https://git.kernel.org/stable/c/ca09dfc3cfdf89e6af3ac24e1c6c0be5c575a729 MISC:https://git.kernel.org/stable/c/d679c816929d62af51c8e6d7fc0e165c9412d2f3 URL:https://git.kernel.org/stable/c/d679c816929d62af51c8e6d7fc0e165c9412d2f3
Assigning CNA
kernel.org
Date Record Created
20240219	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 (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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