On 12/12/23 14:44, Greg Kroah-Hartman wrote: > On Tue, Dec 12, 2023 at 11:17:21AM +0000, Gavrilov Ilia wrote: >> Syzkaller reports memory leak issue at gsmld_attach_gsm() in >> 5.10 stable releases. The reproducer injects the memory allocation >> errors to tty_register_device(); as a result, tty_kref_get() isn't called >> after this error, which leads to tty_struct leak. >> The issue has been fixed by the following patches that can be cleanly >> applied to the 5.10 branch. >> >> Found by InfoTeCS on behalf of Linux Verification Center >> (linuxtesting.org) with Syzkaller > > Do you actually have any hardware for this protocol running on the > 5.10.y kernel? How was this tested? Why was just this specific set of > patches picked to be backported? > No, I don't have any hardware for this protocol. I tested this manually on virtual machines and using a reproducer (generated by syzkaller). The first patch fixes the main problem(memory leak). The third patch fixes the problem with а null pointer dereference. I added this patch because it has a "fixes" tag that references to the first patch. The third patch can't be applied cleanly without the second patch. > thanks, > > greg k-h
