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From: "ldv at altlinux dot org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug libc/18877] New: arm: mmap offset regression
Date: Thu, 27 Aug 2015 17:27:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=18877

            Bug ID: 18877
           Summary: arm: mmap offset regression
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: ldv at altlinux dot org
                CC: adhemerval.zanella at linaro dot org, drepper.fsp at gmail dot com
  Target Milestone: ---
              Host: armv7hl-redhat-linux-gnu

Commit glibc-2.22-7-g2aa6c8af26e65695e9daf382a6e508574a30cdf2 introduced a
regression in mmap on arm.
If mmap is called with negative offset, it now performs a right shift operation
with sign extension, resulting to incorrect offset being passed to mmap2
syscall.

This regression was detected by strace testsuite.

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