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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-26859

net/bnx2x: Prevent access to a freed page in page_pool

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: net/bnx2x: Prevent access to a freed page in page_pool Fix race condition leading to system crash during EEH error handling During EEH error recovery, the bnx2x driver's transmit timeout logic could cause a race condition when handling reset tasks. The bnx2x_tx_timeout() schedules reset tasks via bnx2x_sp_rtnl_task(), which ultimately leads to bnx2x_nic_unload(). In bnx2x_nic_unload() SGEs are freed using bnx2x_free_rx_sge_range(). However, this could overlap with the EEH driver's attempt to reset the device using bnx2x_io_slot_reset(), which also tries to free SGEs. This race condition can result in system crashes due to accessing freed memory locations in bnx2x_free_rx_sge() 799 static inline void bnx2x_free_rx_sge(struct bnx2x *bp, 800 struct bnx2x_fastpath *fp, u16 index) 801 { 802 struct sw_rx_page *sw_buf = &fp->rx_page_ring[index]; 803 struct page *page = sw_buf->page; .... where sw_buf was set to NULL after the call to dma_unmap_page() by the preceding thread. EEH: Beginning: 'slot_reset' PCI 0011:01:00.0#10000: EEH: Invoking bnx2x->slot_reset() bnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing... bnx2x 0011:01:00.0: enabling device (0140 -> 0142) bnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --> driver unload Kernel attempted to read user page (0) - exploit attempt? (uid: 0) BUG: Kernel NULL pointer dereference on read at 0x00000000 Faulting instruction address: 0xc0080000025065fc Oops: Kernel access of bad area, sig: 11 [#1] ..... Call Trace: [c000000003c67a20] [c00800000250658c] bnx2x_io_slot_reset+0x204/0x610 [bnx2x] (unreliable) [c000000003c67af0] [c0000000000518a8] eeh_report_reset+0xb8/0xf0 [c000000003c67b60] [c000000000052130] eeh_pe_report+0x180/0x550 [c000000003c67c70] [c00000000005318c] eeh_handle_normal_event+0x84c/0xa60 [c000000003c67d50] [c000000000053a84] eeh_event_handler+0xf4/0x170 [c000000003c67da0] [c000000000194c58] kthread+0x1c8/0x1d0 [c000000003c67e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64 To solve this issue, we need to verify page pool allocations before freeing.

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

  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < 7bcc090c81116c66936a7415f2c6b1483a4bcfd9affected
  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < 4f37d3a7e004bbf560c21441ca9c022168017ec4affected
  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < 8eebff95ce9558be66a36aa7cfb43223f3ab4699affected
  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < 8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598affected
  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < cf7d8cba639ae792a42c2a137b495eac262ac36caffected
  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < 3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5ebaffected
  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < c51f8b6930db3f259b8820b589f2459d2df3fc68affected
  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < 44f9f1abb0ecc43023225ab9539167facbabf0ecaffected
  • 4cace675d687ebd2d813e90af80ff87ee85202f9 to < d27e2da94a42655861ca4baea30c8cd65546f25daffected

Linux Linux

Default version status: affected

  • 4.2affected
  • 0 to < 4.2unaffected
  • 4.19.311 to ≤ 4.19.*unaffected
  • 5.4.273 to ≤ 5.4.*unaffected
  • 5.10.214 to ≤ 5.10.*unaffected
  • 5.15.153 to ≤ 5.15.*unaffected
  • 6.1.83 to ≤ 6.1.*unaffected
  • 6.6.23 to ≤ 6.6.*unaffected
  • 6.7.11 to ≤ 6.7.*unaffected
  • 6.8.2 to ≤ 6.8.*unaffected
  • 6.9 to ≤ *unaffected

References