Hi Laurent,

Few patches I'v been writting while trying to figure out this issue:
http://lists.nongnu.org/archive/html/qemu-arm/2018-01/msg00514.html

As usual with linux-user files, this series will trigger some checkpatch
benign warnings.

Regards,

Phil.

Since v1:
- addressed Laurent comments
- added 'last' argument to print_sockaddr()
- reordered series, so patches already correct can get applied directly
- dropped "linux-user/syscall: simplify recvfrom()" for now

v1: http://lists.nongnu.org/archive/html/qemu-devel/2018-01/msg05855.html

$ git backport-diff
[----] : patches are identical
[####] : number of functional differences between upstream/downstream patch
[down] : patch is downstream-only
The flags [FC] indicate (F)unctional and (C)ontextual differences, respectively

001/12:[0010] [FC] 'linux-user/strace: Dump AF_NETLINK sockaddr content'
002/12:[down] 'linux-user/strace: Let print_sockaddr() have a 'last' argument'
003/12:[0002] [FC] 'linux-user/strace: Improve sendto() output'
004/12:[0036] [FC] 'linux-user/strace: Add print_sockaddr_ptr() to handle plain/pointer addrlen'
005/12:[0002] [FC] 'linux-user/strace: Improve recvfrom() output'
006/12:[0002] [FC] 'linux-user/strace: Improve getsockname() output'
007/12:[----] [--] 'linux-user/strace: Improve recvmsg() output'
008/12:[0002] [FC] 'linux-user/strace: Improve bind() output'
009/12:[down] 'linux-user/strace: Add print_timezone()'
010/12:[0016] [FC] 'linux-user/strace: Improve gettimeofday() and settimeofday() output'
011/12:[----] [--] 'linux-user/strace: Improve capget()/capset() output'
012/12:[----] [--] 'linux-user/syscall: Verify recvfrom(addr) is user-writable'

Philippe Mathieu-Daudé (12):
  linux-user/syscall: Verify recvfrom(addr) is user-writable
  linux-user/strace: Improve capget()/capset() output
  linux-user/strace: Add print_timezone()
  linux-user/strace: Improve gettimeofday() and settimeofday() output
  linux-user/strace: Dump AF_NETLINK sockaddr content
  linux-user/strace: Improve recvmsg() output
  linux-user/strace: Improve bind() output
  linux-user/strace: improve sendto() output
  linux-user/strace: Let print_sockaddr() have a 'last' argument
  linux-user/strace: Add print_sockaddr_ptr() to handle plain/pointer addrlen
  linux-user/strace: Improve getsockname() output
  linux-user/strace: Improve recvfrom() output

 linux-user/syscall_defs.h |   7 ++
 linux-user/strace.c       | 159 ++++++++++++++++++++++++++++++++++++--
 linux-user/syscall.c      |  11 ++-
 linux-user/strace.list    |  18 ++---
 4 files changed, 179 insertions(+), 16 deletions(-)

-- 
2.18.0