Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: nbpfaxi: Fix memory corruption in probe() The nbpf->chan[] array is allocated earlier in the nbpf_probe() function and it has "num_channels" elements. These three loops iterate one element farther than they should and corrupt memory. The changes to the second loop are more involved. In this case, we're copying data from the irqbuf[] array into the nbpf->chan[] array. If the data in irqbuf[i] is the error IRQ then we skip it, so the iterators are not in sync. I added a check to ensure that we don't go beyond the end of the irqbuf[] array. I'm pretty sure this can't happen, but it seemed harmless to add a check. On the other hand, after the loop has ended there is a check to ensure that the "chan" iterator is where we expect it to be. In the original code we went one element beyond the end of the array so the iterator wasn't in the correct place and it would always return -EINVAL. However, now it will always be in the correct place. I deleted the check since we know the result.
Product status
b45b262cefd5b8eb2ba88d20e5bd295881293894 before 84fff8e6f11b9af1407e273995b5257d99ff0cff
b45b262cefd5b8eb2ba88d20e5bd295881293894 before aec396b4f736f3f8d2c28a9cd2924a4ada57ae87
b45b262cefd5b8eb2ba88d20e5bd295881293894 before 24861ef8b517a309a4225f2793be0cd8fa0bec9e
b45b262cefd5b8eb2ba88d20e5bd295881293894 before f366b36c5e3ce29c9a3c8eed3d1631908e4fc8bb
b45b262cefd5b8eb2ba88d20e5bd295881293894 before 4bb016438335ec02b01f96bf1367378c2bfe03e5
b45b262cefd5b8eb2ba88d20e5bd295881293894 before 122160289adf8ebf15060f1cbf6265b55a914948
b45b262cefd5b8eb2ba88d20e5bd295881293894 before d6bbd67ab5de37a74ac85c83c5a26664b62034dd
b45b262cefd5b8eb2ba88d20e5bd295881293894 before 188c6ba1dd925849c5d94885c8bbdeb0b3dcf510
3.17
Any version before 3.17
5.4.297
5.10.241
5.15.190
6.1.147
6.6.100
6.12.40
6.15.8
6.16
References
git.kernel.org/...c/84fff8e6f11b9af1407e273995b5257d99ff0cff
git.kernel.org/...c/aec396b4f736f3f8d2c28a9cd2924a4ada57ae87
git.kernel.org/...c/24861ef8b517a309a4225f2793be0cd8fa0bec9e
git.kernel.org/...c/f366b36c5e3ce29c9a3c8eed3d1631908e4fc8bb
git.kernel.org/...c/4bb016438335ec02b01f96bf1367378c2bfe03e5
git.kernel.org/...c/122160289adf8ebf15060f1cbf6265b55a914948
git.kernel.org/...c/d6bbd67ab5de37a74ac85c83c5a26664b62034dd
git.kernel.org/...c/188c6ba1dd925849c5d94885c8bbdeb0b3dcf510
