CVE-2022-49625
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49625
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49625.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49625
- Related
- Published
- 2025-02-26T07:01:37Z
- Modified
- 2025-02-26T19:01:35.610762Z
- Downstream
- Summary
- [none]
- Details
-
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 efxef10tryupdatenicstatsvf.
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: BUGON(ininterrupt());
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.x8664 #1 Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020 RIP: 0010:vunmap+0x2e/0x30 ...skip... Call Trace: _iommudmafree+0x96/0x100 efxnicfreebuffer+0x2b/0x40 [sfc] efxef10tryupdatenicstatsvf+0x14a/0x1c0 [sfc] efxef10updatestatsvf+0x18/0x40 [sfc] efxstartall+0x15e/0x1d0 [sfc] efxnetopen+0x5a/0xe0 [sfc] _devopen+0xe7/0x1a0 _devchangeflags+0x1d7/0x240 devchangeflags+0x21/0x60 ...skip...
- References
-
- https://git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a
- https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de
- https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4
- https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e
- https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629
- https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8
- https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0
- https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906
- https://security-tracker.debian.org/tracker/CVE-2022-49625
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed5.10.136-1
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source