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author | Daniel Borkmann <daniel@iogearbox.net> | 2019-11-02 00:17:56 +0100 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2019-11-02 12:39:12 -0700 |
commit | 1d1585ca0f48fe7ed95c3571f3e4a82b2b5045dc (patch) | |
tree | 0e36ebafa09168d30407e3b5fb06905647f91262 /mm/gup.c | |
parent | e1cb7d2d60d536baf24d2f0fd58786324ce92331 (diff) | |
download | linux-1d1585ca0f48fe7ed95c3571f3e4a82b2b5045dc.tar.bz2 |
uaccess: Add non-pagefault user-space write function
Commit 3d7081822f7f ("uaccess: Add non-pagefault user-space read functions")
missed to add probe write function, therefore factor out a probe_write_common()
helper with most logic of probe_kernel_write() except setting KERNEL_DS, and
add a new probe_user_write() helper so it can be used from BPF side.
Again, on some archs, the user address space and kernel address space can
co-exist and be overlapping, so in such case, setting KERNEL_DS would mean
that the given address is treated as being in kernel address space.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Link: https://lore.kernel.org/bpf/9df2542e68141bfa3addde631441ee45503856a8.1572649915.git.daniel@iogearbox.net
Diffstat (limited to 'mm/gup.c')
0 files changed, 0 insertions, 0 deletions