[SCM] Hurd branch, master, updated. v0.8-87-g62953f1

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit 62953f120bcdc976a3dfb96505066228464a78dd
Author: Samuel Thibault <address@hidden>
Date:   Sun Nov 20 16:22:29 2016 +0100

    libpager, libstore: Fix crash on ENOSPC while writing data
    
    We need to save blocked signals, otherwise longjmp will not unblock
    SIGSEGV/SIGBUS, and thus next exception will kill us. Also, we need to
    make sure that the preemptor is set at the right window in main memory
    before letting a handler see it.
    
    * libpager/pager-memcpy.c (do_memcpy): Call __sync_synchronize()
    between aligning the fault preemptor and actually accessing data.
    (fault): Use siglongjmp instead of longjmp.
    (pager_memcpy): Use sigsetjmp instead of setjmp.
    * libstore/memobj.c (copy, fault, memobj_memcpy): Likewise.

commit 484a67719146e819ddad64fbda23b4b23afa3095
Author: Samuel Thibault <address@hidden>
Date:   Sun Nov 20 16:19:38 2016 +0100

    ext2fs: Fix crash on ENOSPC while extending a directory
    
    * ext2fs/dir.c (diskfs_direnter_hard): Call hurd_safe_memset on
    directory extension before using it, to actually reserve room.

-----------------------------------------------------------------------

Summary of changes:
 ext2fs/dir.c            |    8 ++++++++
 libpager/pager-memcpy.c |    5 +++--
 libstore/memobj.c       |    5 +++--
 3 files changed, 14 insertions(+), 4 deletions(-)


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