CVE-2024-50153 Information

Description

In the Linux kernel the following vulnerability has been resolved:

scsi: target: core: Fix null-ptr-deref in target_alloc_device()

There is a null-ptr-deref issue reported by KASAN:

BUG: KASAN: null-ptr-deref in target_alloc_device+0xbc4/0xbe0 [target_core_mod] … kasan_report+0xb9/0xf0 target_alloc_device+0xbc4/0xbe0 [target_core_mod] core_dev_setup_virtual_lun0+0xef/0x1f0 [target_core_mod] target_core_init_configfs+0x205/0x420 [target_core_mod] do_one_initcall+0xdd/0x4e0 … entry_SYSCALL_64_after_hwframe+0x76/0x7e

In target_alloc_device() if allocing memory for dev queues fails then dev will be freed by dev->transport->free_device() but dev->transport is not initialized at that time which will lead to a null pointer reference problem.

Fixing this bug by freeing dev with hba->backend->ops->free_device().

Reference

https://git.kernel.org/stable/c/39e02fa90323243187c91bb3e8f2f5f6a9aacfc7 https://git.kernel.org/stable/c/895ab729425ef9bf3b6d2f8d0853abe64896f314 https://git.kernel.org/stable/c/b80e9bc85bd9af378e7eac83e15dd129557bbdb6 https://git.kernel.org/stable/c/14a6a2adb440e4ae97bee73b2360946bd033dadd https://git.kernel.org/stable/c/fca6caeb4a61d240f031914413fcc69534f6dc03