Public bug reported:

Issue found on 3.13.0-190.241 lowlatency kernel with node gonzo (passed
with generic kernel on another node rizzo)

Test fail rate 4 out of 4 attempts.

Test log:
 test_brk_collision (__main__.KernelASLRCollisionsTest)
 Check if brk crashes into mmap in 10,000 execs (i386, nx-emu only) (LP: 
#452175) ... FAIL
 test_stack_collision (__main__.KernelASLRCollisionsTest)
 
 Check if stack crashes into mmap in 100,000 execs (amd64 only?) (LP: #504164) 
... ok
 
 ======================================================================
 FAIL: test_brk_collision (__main__.KernelASLRCollisionsTest)
 Check if brk crashes into mmap in 10,000 execs (i386, nx-emu only) (LP: 
#452175)
 ----------------------------------------------------------------------
 Traceback (most recent call last):
   File "./test-kernel-aslr-collisions.py", line 95, in test_brk_collision
     self.assertShellExitEquals(0, ['./explode-brk'])
   File 
"/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_aslr_collisions/src/qa-regression-testing/scripts/testlib.py",
 line 1203, in assertShellExitEquals
     self.assertEqual(expected, rc, msg + result + report)
 AssertionError: Got exit code 1, expected 0
 Command: './explode-brk'
 Output:
 7f59c8fd8000-7f59c9196000 r-xp 00000000 08:01 3281122                    
/lib/x86_64-linux-gnu/libc-2.19.so
 7f59c9196000-7f59c9396000 ---p 001be000 08:01 3281122                    
/lib/x86_64-linux-gnu/libc-2.19.so
 7f59c9396000-7f59c939a000 r--p 001be000 08:01 3281122                    
/lib/x86_64-linux-gnu/libc-2.19.so
 7f59c939a000-7f59c939c000 rw-p 001c2000 08:01 3281122                    
/lib/x86_64-linux-gnu/libc-2.19.so
 7f59c939c000-7f59c93a1000 rw-p 00000000 00:00 0 
 7f59c93a8000-7f59c93cb000 r-xp 00000000 08:01 3281111                    
/lib/x86_64-linux-gnu/ld-2.19.so
 7f59c95ca000-7f59c95cb000 r--p 00022000 08:01 3281111                    
/lib/x86_64-linux-gnu/ld-2.19.so
 7f59c95cb000-7f59c95cc000 rw-p 00023000 08:01 3281111                    
/lib/x86_64-linux-gnu/ld-2.19.so
 7f59c95cc000-7f59c95cd000 rw-p 00000000 00:00 0 
 7f59c95d0000-7f59c95d1000 r-xp 00000000 08:01 15470803                   
/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_aslr_collisions/src/qa-regression-testing/scripts/kernel-aslr-collisions/explode-brk
 7f59c97d0000-7f59c97d1000 r--p 00000000 08:01 15470803                   
/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_aslr_collisions/src/qa-regression-testing/scripts/kernel-aslr-collisions/explode-brk
 7f59c97d1000-7f59c97d2000 rw-p 00001000 08:01 15470803                   
/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_aslr_collisions/src/qa-regression-testing/scripts/kernel-aslr-collisions/explode-brk
 7f59c97d4000-7f59c97d8000 rw-p 00000000 00:00 0                          [heap]
 7fffd59ff000-7fffd5a20000 rw-p 00000000 00:00 0                          
[stack]
 7fffd5a20000-7fffd5a22000 r-xp 00000000 00:00 0                          [vdso]
 ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  
[vsyscall]
 FAIL: unable to use brk area at 0x7f59c97d4000 - 0x7f59c97dc000
 
 
 ----------------------------------------------------------------------
 Ran 5 tests in 467.450s
 
 FAILED (failures=1)

** Affects: ubuntu-kernel-tests
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu Trusty)
     Importance: Undecided
         Status: New


** Tags: 3.13 sru-20220509 trusty ubuntu-qrt-kernel-aslr-collisions

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Tags added: 3.13 sru-20220509 trusty ubuntu-qrt-kernel-aslr-
collisions

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https://bugs.launchpad.net/bugs/1978038

Title:
  test_brk_collision in ubuntu_qrt_kernel_aslr_collisions failed on T

Status in ubuntu-kernel-tests:
  New
Status in linux package in Ubuntu:
  New
Status in linux source package in Trusty:
  New

Bug description:
  Issue found on 3.13.0-190.241 lowlatency kernel with node gonzo
  (passed with generic kernel on another node rizzo)

  Test fail rate 4 out of 4 attempts.

  Test log:
   test_brk_collision (__main__.KernelASLRCollisionsTest)
   Check if brk crashes into mmap in 10,000 execs (i386, nx-emu only) (LP: 
#452175) ... FAIL
   test_stack_collision (__main__.KernelASLRCollisionsTest)
   
   Check if stack crashes into mmap in 100,000 execs (amd64 only?) (LP: 
#504164) ... ok
   
   ======================================================================
   FAIL: test_brk_collision (__main__.KernelASLRCollisionsTest)
   Check if brk crashes into mmap in 10,000 execs (i386, nx-emu only) (LP: 
#452175)
   ----------------------------------------------------------------------
   Traceback (most recent call last):
     File "./test-kernel-aslr-collisions.py", line 95, in test_brk_collision
       self.assertShellExitEquals(0, ['./explode-brk'])
     File 
"/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_aslr_collisions/src/qa-regression-testing/scripts/testlib.py",
 line 1203, in assertShellExitEquals
       self.assertEqual(expected, rc, msg + result + report)
   AssertionError: Got exit code 1, expected 0
   Command: './explode-brk'
   Output:
   7f59c8fd8000-7f59c9196000 r-xp 00000000 08:01 3281122                    
/lib/x86_64-linux-gnu/libc-2.19.so
   7f59c9196000-7f59c9396000 ---p 001be000 08:01 3281122                    
/lib/x86_64-linux-gnu/libc-2.19.so
   7f59c9396000-7f59c939a000 r--p 001be000 08:01 3281122                    
/lib/x86_64-linux-gnu/libc-2.19.so
   7f59c939a000-7f59c939c000 rw-p 001c2000 08:01 3281122                    
/lib/x86_64-linux-gnu/libc-2.19.so
   7f59c939c000-7f59c93a1000 rw-p 00000000 00:00 0 
   7f59c93a8000-7f59c93cb000 r-xp 00000000 08:01 3281111                    
/lib/x86_64-linux-gnu/ld-2.19.so
   7f59c95ca000-7f59c95cb000 r--p 00022000 08:01 3281111                    
/lib/x86_64-linux-gnu/ld-2.19.so
   7f59c95cb000-7f59c95cc000 rw-p 00023000 08:01 3281111                    
/lib/x86_64-linux-gnu/ld-2.19.so
   7f59c95cc000-7f59c95cd000 rw-p 00000000 00:00 0 
   7f59c95d0000-7f59c95d1000 r-xp 00000000 08:01 15470803                   
/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_aslr_collisions/src/qa-regression-testing/scripts/kernel-aslr-collisions/explode-brk
   7f59c97d0000-7f59c97d1000 r--p 00000000 08:01 15470803                   
/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_aslr_collisions/src/qa-regression-testing/scripts/kernel-aslr-collisions/explode-brk
   7f59c97d1000-7f59c97d2000 rw-p 00001000 08:01 15470803                   
/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_aslr_collisions/src/qa-regression-testing/scripts/kernel-aslr-collisions/explode-brk
   7f59c97d4000-7f59c97d8000 rw-p 00000000 00:00 0                          
[heap]
   7fffd59ff000-7fffd5a20000 rw-p 00000000 00:00 0                          
[stack]
   7fffd5a20000-7fffd5a22000 r-xp 00000000 00:00 0                          
[vdso]
   ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  
[vsyscall]
   FAIL: unable to use brk area at 0x7f59c97d4000 - 0x7f59c97dc000
   
   
   ----------------------------------------------------------------------
   Ran 5 tests in 467.450s
   
   FAILED (failures=1)

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