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Arjun Shankar d13a7a6f10 socket: Check lengths before advancing pointer in CMSG_NXTHDR 
The inline and library functions that the CMSG_NXTHDR macro may expand
to increment the pointer to the header before checking the stride of
the increment against available space.  Since C only allows incrementing
pointers to one past the end of an array, the increment must be done
after a length check.  This commit fixes that and includes a regression
test for CMSG_FIRSTHDR and CMSG_NXTHDR.

The Linux, Hurd, and generic headers are all changed.

Tested on Linux on armv7hl, i686, x86_64, aarch64, ppc64le, and s390x.

[BZ #28846]

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
(cherry picked from commit 9c443ac4559a47ed99859bd80d14dc4b6dd220a1)
2022-08-22 16:32:13 +02:00
..
types
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atomic_wide_counter.h
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byteswap.h
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confname.h
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dirent_ext.h
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dirent.h
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dl_find_object.h
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dlfcn.h
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elfclass.h
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endian.h
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environments.h
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errno.h
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fcntl.h
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fenv.h
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floatn-common.h
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floatn.h
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flt-eval-method.h
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fp-fast.h
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fp-logb.h
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hwcap.h
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in.h
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indirect-return.h
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ioctl-types.h
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ioctls.h
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ipc.h
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ipctypes.h
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iscanonical.h
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libc-header-start.h
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libm-simd-decl-stubs.h
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link_lavcurrent.h
elf: Issue la_symbind for bind-now (BZ #23734)
2022-02-01 14:49:46 -03:00
link.h
* csu/elf-init.c (__libc_csu_fini): Don't do anything here.
2005-01-06 22:40:27 +00:00
local_lim.h
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long-double.h
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math-vector.h
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mathdef.h
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mman_ext.h
linux: Add process_madvise
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mman.h
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mqueue.h
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param.h
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poll.h
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posix_opt.h
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pthreadtypes.h
2002-11-10 Roland McGrath <roland@redhat.com>
2002-11-10 23:22:35 +00:00
resource.h
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sched.h
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select.h
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sem.h
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setjmp.h
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shm.h
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sigaction.h
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sigcontext.h
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siginfo-consts.h
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signal_ext.h
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sockaddr.h
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socket.h
socket: Check lengths before advancing pointer in CMSG_NXTHDR
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ss_flags.h
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stat.h
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stdlib-bsearch.h
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syslog-path.h
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wordsize.h
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