Description
In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown epf_ntb_epc_destroy() duplicates the teardown that the caller is supposed to perform later. This leads to an oops when .allow_link fails or when .drop_link is performed. The following is an example oops of the former case: Unable to handle kernel paging request at virtual address dead000000000108 [...] [dead000000000108] address between user and kernel address ranges Internal error: Oops: 0000000096000044 [#1] SMP [...] Call trace: pci_epc_remove_epf+0x78/0xe0 (P) pci_primary_epc_epf_link+0x88/0xa8 configfs_symlink+0x1f4/0x5a0 vfs_symlink+0x134/0x1d8 do_symlinkat+0x88/0x138 __arm64_sys_symlinkat+0x74/0xe0 [...] Remove the helper, and drop pci_epc_put(). EPC device refcounting is tied to the configfs EPC group lifetime, and pci_epc_put() in the .drop_link path is sufficient.
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
e2b6ef72b7aea9d7d480d2df499bcd1c93247abb to < 305a0674bc552bfcc3231e23fb91cf4f62aec168affectede35f56bb03304abc92c928b641af41ca372966bb to < b261027a1a235d8925e332363f23135a0eff2b35affectede35f56bb03304abc92c928b641af41ca372966bb to < e238ab12556b00f3b4d8b870b32ba1e4f4d4ebc2affectede35f56bb03304abc92c928b641af41ca372966bb to < 73bf218de28d039126dc64281d2b47dd3c46a0a3affectede35f56bb03304abc92c928b641af41ca372966bb to < cec9ead73ab154a7953f6ab8dd5127e0d6bbf95aaffectede35f56bb03304abc92c928b641af41ca372966bb to < 478e776101592eb63298714e96823ef78a3295ecaffectede35f56bb03304abc92c928b641af41ca372966bb to < a7a3cab4d33fd8a8aed864c447d0d7c99e85404eaffectede35f56bb03304abc92c928b641af41ca372966bb to < 0da63230d3ec1ec5fcc443a2314233e95bfece54affected5.15.153 to < 5.15.209affected
Linux Linux
Default version status: affected
6.0affected0 to < 6.0unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.136 to ≤ 6.6.*unaffected6.12.84 to ≤ 6.12.*unaffected6.18.24 to ≤ 6.18.*unaffected6.19.14 to ≤ 6.19.*unaffected7.0.1 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/305a0674bc552bfcc3231e23fb91cf4f62aec168 ↗
- https://git.kernel.org/stable/c/b261027a1a235d8925e332363f23135a0eff2b35 ↗
- https://git.kernel.org/stable/c/e238ab12556b00f3b4d8b870b32ba1e4f4d4ebc2 ↗
- https://git.kernel.org/stable/c/73bf218de28d039126dc64281d2b47dd3c46a0a3 ↗
- https://git.kernel.org/stable/c/cec9ead73ab154a7953f6ab8dd5127e0d6bbf95a ↗
- https://git.kernel.org/stable/c/478e776101592eb63298714e96823ef78a3295ec ↗
- https://git.kernel.org/stable/c/a7a3cab4d33fd8a8aed864c447d0d7c99e85404e ↗
- https://git.kernel.org/stable/c/0da63230d3ec1ec5fcc443a2314233e95bfece54 ↗