Christoph Pleger: > > - aufs4-mmap.patch is applied in-correctly, > > or in-correct version is applied, > > or bad aufs version which contained a in-correct version is used. > > > > The last part of mm/nommu.c:do_mmap(), > > fput(vma->vm_file); > > should be > > vma_fput(vma); > > Changing that did not solve the problem.
Tomas M kindly told me that it is AppArmor who blocked the file access. And I found these lines from Christoph's very big logfile. [ 278.101295] audit: type=1400 audit(1571757260.203:7): apparmor="DENIED" operation="open" profile="man_groff" name="/live/image/etc/ld.so.cache" pid=1431 comm="preconv" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 [ 278.101481] audit: type=1400 audit(1571757260.203:8): apparmor="DENIED" operation="open" profile="man_groff" name="/live/image/usr/lib/x86_64-linux-gnu/libuchardet.so.0.0.6" pid=1431 comm="preconv" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 [ 278.126956] audit: type=1400 audit(1571757260.231:9): apparmor="DENIED" operation="open" profile="man_groff" name="/live/image/etc/ld.so.cache" pid=1432 comm="tbl" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 [ 278.127080] audit: type=1400 audit(1571757260.231:10): apparmor="DENIED" operation="open" profile="man_groff" name="/live/image/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.25" pid=1432 comm="tbl" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 [ 278.289710] audit: type=1400 audit(1571757260.391:11): apparmor="DENIED" operation="open" profile="man_groff" name="/live/image/etc/ld.so.cache" pid=1441 comm="troff" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 [ 278.347156] audit: type=1400 audit(1571757260.451:12): apparmor="DENIED" operation="open" profile="man_groff" name="/live/image/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.25" pid=1441 comm="troff" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 These msgs looks matching the strace logfile, and expains the problem. But I don't know why AppArmor denied the access. Does your AppArmor setting allow reading "/etc/ld.so.cache" and "/usr/lib/x86_64-linux-gnu/*.so*", but deny for "/live/image/..."? J. R. Okajima
