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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-49625

sfc: fix kernel panic when creating VF

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

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...

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • d778819609a27efd5358da8151a0ad3507243e19 to < d9840212a9c00507347c703f4fdeda16400407e0affected
  • d778819609a27efd5358da8151a0ad3507243e19 to < b9072305270579a9d6afc9b926166231e5b1a7c8affected
  • d778819609a27efd5358da8151a0ad3507243e19 to < 82bcb730f856086f033e6c04082eb4503d4c2fa4affected
  • d778819609a27efd5358da8151a0ad3507243e19 to < da346adcf5573fd8663cabfdfe8371009629a906affected
  • d778819609a27efd5358da8151a0ad3507243e19 to < b82e4ad58a7fb72456503958a93060f87896e629affected
  • d778819609a27efd5358da8151a0ad3507243e19 to < 68e5f32f0de9594629ff9e599294d9801c6187deaffected
  • d778819609a27efd5358da8151a0ad3507243e19 to < 16662524ec5da801fb78a1afcaf6e782f1cf103aaffected
  • d778819609a27efd5358da8151a0ad3507243e19 to < ada74c5539eba06cf8b47d068f92e0b3963a9a6eaffected

Linux Linux

Default version status: affected

  • 4.2affected
  • 0 to < 4.2unaffected
  • 4.9.324 to ≤ 4.9.*unaffected
  • 4.14.289 to ≤ 4.14.*unaffected
  • 4.19.253 to ≤ 4.19.*unaffected
  • 5.4.207 to ≤ 5.4.*unaffected
  • 5.10.132 to ≤ 5.10.*unaffected
  • 5.15.56 to ≤ 5.15.*unaffected
  • 5.18.13 to ≤ 5.18.*unaffected
  • 5.19 to ≤ *unaffected

References