UBUNTU-CVE-2024-36476

Dashboard / Vulnerabilities / UBUNTU-CVE-2024-36476

UBUNTU-CVE-2024-36476

Summary:

Details: In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs: Ensure 'ib_sge list' is accessible Move the declaration of the 'ib_sge list' variable outside the 'always_invalidate' block to ensure it remains accessible for use throughout the function. Previously, 'ib_sge list' was declared within the 'always_invalidate' block, limiting its accessibility, then caused a 'BUG: kernel NULL pointer dereference'[1]. ? __die_body.cold+0x19/0x27 ? page_fault_oops+0x15a/0x2d0 ? search_module_extables+0x19/0x60 ? search_bpf_extables+0x5f/0x80 ? exc_page_fault+0x7e/0x180 ? asm_exc_page_fault+0x26/0x30 ? memcpy_orig+0xd5/0x140 rxe_mr_copy+0x1c3/0x200 [rdma_rxe] ? rxe_pool_get_index+0x4b/0x80 [rdma_rxe] copy_data+0xa5/0x230 [rdma_rxe] rxe_requester+0xd9b/0xf70 [rdma_rxe] ? finish_task_switch.isra.0+0x99/0x2e0 rxe_sender+0x13/0x40 [rdma_rxe] do_task+0x68/0x1e0 [rdma_rxe] process_one_work+0x177/0x330 worker_thread+0x252/0x390 ? __pfx_worker_thread+0x10/0x10 This change ensures the variable is available for subsequent operations that require it. [1] https://lore.kernel.org/linux-rdma/[email protected]/

References: https://ubuntu.com/security/CVE-2024-36476, https://www.cve.org/CVERecord?id=CVE-2024-36476, https://git.kernel.org/linus/fb514b31395946022f13a08e06a435f53cf9e8b3, https://git.kernel.org/stable/c/143378075904e78b3b2a810099bcc3b3d82d762f, https://git.kernel.org/stable/c/32e1e748a85bd52b20b3857d80fd166d22fa455a, https://git.kernel.org/stable/c/6ffb5c1885195ae5211a12b4acd2d51843ca41b0, https://git.kernel.org/stable/c/7eaa71f56a6f7ab87957213472dc6d4055862722, https://git.kernel.org/stable/c/b238f61cc394d5fef27b26d7d9aa383ebfddabb0, https://git.kernel.org/stable/c/fb514b31395946022f13a08e06a435f53cf9e8b3, https://ubuntu.com/security/notices/USN-7379-1, https://ubuntu.com/security/notices/USN-7380-1, https://ubuntu.com/security/notices/USN-7381-1, https://ubuntu.com/security/notices/USN-7382-1, https://ubuntu.com/security/notices/USN-7387-1, https://ubuntu.com/security/notices/USN-7388-1, https://ubuntu.com/security/notices/USN-7389-1, https://ubuntu.com/security/notices/USN-7390-1, https://ubuntu.com/security/notices/USN-7387-2, https://ubuntu.com/security/notices/USN-7387-3, https://ubuntu.com/security/notices/USN-7379-2, https://ubuntu.com/security/notices/USN-7407-1, https://ubuntu.com/security/notices/USN-7421-1, https://ubuntu.com/security/notices/USN-7458-1, https://ubuntu.com/security/notices/USN-7459-1, https://ubuntu.com/security/notices/USN-7459-2, https://ubuntu.com/security/notices/USN-7513-1, https://ubuntu.com/security/notices/USN-7513-2, https://ubuntu.com/security/notices/USN-7514-1, https://ubuntu.com/security/notices/USN-7515-1, https://ubuntu.com/security/notices/USN-7513-3, https://ubuntu.com/security/notices/USN-7522-1, https://ubuntu.com/security/notices/USN-7515-2, https://ubuntu.com/security/notices/USN-7523-1, https://ubuntu.com/security/notices/USN-7524-1, https://ubuntu.com/security/notices/USN-7513-4, https://ubuntu.com/security/notices/USN-7513-5