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Change History

In the Linux kernel, the following vulnerability has been resolved:

kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address

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 reported
the case if user specifies inaccessible data area,
arch_adjust_kprobe_addr() will cause a kernel panic.

[ mingo: Clarified the comment. ]

kernel.org https://git.kernel.org/stable/c/20fdb21eabaeb8f78f8f701f56d14ea0836ec861 [No types assigned]

kernel.org https://git.kernel.org/stable/c/4e51653d5d871f40f1bd5cf95cc7f2d8b33d063b [No types assigned]

kernel.org https://git.kernel.org/stable/c/6417684315087904fffe8966d27ca74398c57dd6 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b69f577308f1070004cafac106dd1a44099e5483 [No types assigned]

kernel.org https://git.kernel.org/stable/c/f13edd1871d4fb4ab829aff629d47914e251bae3 [No types assigned]