diff options
| author | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2024-03-15 00:17:30 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-03-22 11:40:56 +0100 |
| commit | 4e51653d5d871f40f1bd5cf95cc7f2d8b33d063b (patch) | |
| tree | 4b75c36977acabb1b31101b3f58c47f6248235e8 /tools/perf/scripts/python/libxed.py | |
| parent | e3f269ed0accbb22aa8f25d2daffa23c3fccd407 (diff) | |
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. ]
Fixes: cc66bb914578 ("x86/ibt,kprobes: Cure sym+0 equals fentry woes")
Reported-by: Qiang Zhang <zzqq0103.hey@gmail.com>
Tested-by: Jinghao Jia <jinghao7@illinois.edu>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/171042945004.154897.2221804961882915806.stgit@devnote2
Diffstat (limited to 'tools/perf/scripts/python/libxed.py')
0 files changed, 0 insertions, 0 deletions