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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1744122
and then change the status of the bug to 'Confirmed'.
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1744122
Title:
Ubuntu 16.04.3 LTS with kerne 4.4.0-109-generic, segfaults vsyscalls
Status in linux package in Ubuntu:
Incomplete
Bug description:
The following ubuntu xenial version segfaults any program trying to
read its own vsyscall memory segment. The affected ubuntu version:
Vagrant box: ubuntu/xenial64 (v20180112.0.0)
Kernel: 4.4.0-109-generic
Executing the following program segfaults:
// gcc -g -O0 <file>
int main() {
// You use gdb to pause the program and
// check through /proc/<pid>/maps that this
// memory addrs is mapped to [vsyscall]
return *(int*)(0xffffffffff600000);
}
The following two versions work fine:
Vagrant box: ubuntu/bionic64 (v20180115.1.0)
Kernel: 4.13.0-25-generic
Vagrant box: ubuntu/xenial64 (v20171028.0.0)
Kernel: 4.4.0-97-generic
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