CVE - CVE-2022-49625

CVE-ID
CVE-2022-49625	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: sfc: fix kernel panic when creating VF When creating VFs a kernel panic can happen when calling to efx_ef10_try_update_nic_stats_vf. When releasing a DMA coherent buffer, sometimes, I don't know in what specific circumstances, it has to unmap memory with vunmap. It is disallowed to do that in IRQ context or with BH disabled. Otherwise, we hit this line in vunmap, causing the crash: BUG_ON(in_interrupt()); This patch reenables BH to release the buffer. Log messages when the bug is hit: kernel BUG at mm/vmalloc.c:2727! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 6 PID: 1462 Comm: NetworkManager Kdump: loaded Tainted: G I --------- --- 5.14.0-119.el9.x86_64 #1 Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020 RIP: 0010:vunmap+0x2e/0x30 ...skip... Call Trace: __iommu_dma_free+0x96/0x100 efx_nic_free_buffer+0x2b/0x40 [sfc] efx_ef10_try_update_nic_stats_vf+0x14a/0x1c0 [sfc] efx_ef10_update_stats_vf+0x18/0x40 [sfc] efx_start_all+0x15e/0x1d0 [sfc] efx_net_open+0x5a/0xe0 [sfc] __dev_open+0xe7/0x1a0 __dev_change_flags+0x1d7/0x240 dev_change_flags+0x21/0x60 ...skip...
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/16662524ec5da801fb78a1afcaf6e782f1cf103a URL:https://git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a MISC:https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de URL:https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de MISC:https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4 URL:https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4 MISC:https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e URL:https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e MISC:https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629 URL:https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629 MISC:https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8 URL:https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8 MISC:https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0 URL:https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0 MISC:https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906 URL:https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906
Assigning CNA
kernel.org
Date Record Created
20250226	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 (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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