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(parent: 085354f) | patch
arc: don't leak bits of kernel stack into coredump
authorAl Viro <viro@zeniv.linux.org.uk>
Sat, 10 Sep 2016 20:31:04 +0000 (16:31 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Thu, 15 Sep 2016 23:51:55 +0000 (19:51 -0400)
commit7798bf2140ebcc36eafec6a4194fffd8d585d471
treef3babde13b19f0f95ba1f27d5af1569404722444tree | snapshot (tar.gz zip)
parent085354f907969fb3ee33f236368f6e1dd4c74d62commit | diff
arc: don't leak bits of kernel stack into coredump

On faulting sigreturn we do get SIGSEGV, all right, but anything
we'd put into pt_regs could end up in the coredump.  And since
__copy_from_user() never zeroed on arc, we'd better bugger off
on its failure without copying random uninitialized bits of
kernel stack into pt_regs...

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
arch/arc/kernel/signal.c diff | blob | blame | history