Re: [PATCH 5.10.y 0/1] bpf: fix warning ftrace_verify_code
From: <hidden>
Date: 2024-01-29 18:34:03
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bpf, lkml, stable
29.01.2024 19:20, Greg KH wrote:
On Mon, Jan 29, 2024 at 12:17:45PM +0300, kovalev@altlinux.org wrote:quoted
Syzkaller hit 'WARNING in ftrace_verify_code' bug. This bug is not a vulnerability and is reproduced only when running with root privileges on stable 5.10 kernel.What about 5.15.y? We can't take a patch for older kernels and not for newer ones, right?
Indeed, this patch was not backported at 5.15. I fixed it, successfully tested it on the 5.15.148 kernel and sent the patch [1] However, at the time of the kernel build, I noticed a compiler warning about an unused "*tmp" variable, that I fixed in the patch for 5.15, but remained in this patch 5.10: ... + void *new, *tmp; ... need to fix on ... + void *new; ... Therefore, I resend the patch with a fix (deleted the unused tmp pointer). [2] [1] https://lore.kernel.org/bpf/20240129180108.284057-1-kovalev@altlinux.org/T/#u (local) [2] https://lore.kernel.org/bpf/20240129183120.284801-1-kovalev@altlinux.org/T/#u (local) -- Regards, Vasiliy Kovalev