sparc32: fix register window handling in genregs32_[gs]et()
authorAl Viro <viro@zeniv.linux.org.uk>
Sun, 17 May 2020 16:20:40 +0000 (12:20 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 20 May 2020 17:29:37 +0000 (13:29 -0400)
commitcf51e129b96847f969bfb8af1ee1516a01a70b39
tree4311086f82c37df73c174cc71c3a8849079a84a5
parent142cd25293f6a7ecbdff4fb0af17de6438d46433
sparc32: fix register window handling in genregs32_[gs]et()

It needs access_process_vm() if the traced process does not share
mm with the caller.  Solution is similar to what sparc64 does.
Note that genregs32_set() is only ever called with pos being 0
or 32 * sizeof(u32) (the latter - as part of PTRACE_SETREGS
handling).

Cc: stable@kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
arch/sparc/kernel/ptrace_32.c