Re: [PATCH v2] kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address

On Sun, 17 Mar 2024 10:53:59 -0500 Jinghao Jia wrote: > > > On 3/16/24 08:46, Masami Hiramatsu (Google) wrote: > > On Thu, 14 Mar 2024 18:56:35 -0500 > > Jinghao Jia wrote: > > > >> On 3/14/24 10:17, Masami Hiramatsu (Google) wrote: > >>> From: Masami Hiramatsu (Google) > >>> > >>> Read

Re: [PATCH v2] kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address

On 3/16/24 08:46, Masami Hiramatsu (Google) wrote: > On Thu, 14 Mar 2024 18:56:35 -0500 > Jinghao Jia wrote: > >> On 3/14/24 10:17, Masami Hiramatsu (Google) wrote: >>> From: Masami Hiramatsu (Google) >>> >>> Read from an unsafe address with copy_from_kernel_nofault() in >>>

Re: [PATCH v2] kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address

On 3/14/24 10:17, Masami Hiramatsu (Google) wrote: > From: Masami Hiramatsu (Google) > > Read from an unsafe address with copy_from_kernel_nofault() in > arch_adjust_kprobe_addr() because this function is used before checking > the address is in text or not. Syzcaller bot found a bug and