[Bug runtime/4849] New: Seeing vfree freeing bad address in /var/log/messages

["wcohen at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

With the snapshot from 20070721 and the 2.6.23-rc1 kernel seeing that some of
the tests are generating messages in the /var/log/messages like the following
for testsuite/systemtap.base/equal.stp:

Jul 26 15:45:00 calfee kernel: Trying to vfree() bad address (ffffc200001ee710)
Jul 26 15:45:00 calfee kernel: WARNING: at mm/vmalloc.c:330 __vunmap()
Jul 26 15:45:00 calfee kernel: 
Jul 26 15:45:00 calfee kernel: Call Trace:
Jul 26 15:45:00 calfee kernel:  [<ffffffff8044fa69>] text_poke+0xc7/0xd2
Jul 26 15:45:00 calfee kernel:  [<ffffffff8044fd4b>] arch_arm_kprobe+0x19/0x1b
Jul 26 15:45:00 calfee kernel:  [<ffffffff8045178f>] __register_kprobe+0x2ea/0x318
Jul 26 15:45:00 calfee kernel:  [<ffffffff881eda0a>]
:stap_fb9cb7fbad36a1b0c2a26a0623f51ade_765:systemtap_module_init+0x2c9/0x2cb
Jul 26 15:45:00 calfee kernel:  [<ffffffff881eda12>]
:stap_fb9cb7fbad36a1b0c2a26a0623f51ade_765:probe_start+0x6/0xf
Jul 26 15:45:00 calfee kernel:  [<ffffffff881eda3c>]
:stap_fb9cb7fbad36a1b0c2a26a0623f51ade_765:_stp_handle_start+0x21/0x7e
Jul 26 15:45:00 calfee kernel:  [<ffffffff881edc21>]
:stap_fb9cb7fbad36a1b0c2a26a0623f51ade_765:_stp_ctl_write_cmd+0x188/0x816
Jul 26 15:45:00 calfee kernel:  [<ffffffff80225d80>] activate_task+0x66/0x7b
Jul 26 15:45:00 calfee kernel:  [<ffffffff802268ee>] wake_up_new_task+0xaa/0xb5
Jul 26 15:45:00 calfee kernel:  [<ffffffff8022c7db>] do_fork+0x123/0x1f6
Jul 26 15:45:00 calfee kernel:  [<ffffffff8027d19d>] vfs_write+0xd4/0x158
Jul 26 15:45:00 calfee kernel:  [<ffffffff8027d2d4>] sys_write+0x45/0x6e
Jul 26 15:45:00 calfee kernel:  [<ffffffff8020b38e>] system_call+0x7e/0x83
Jul 26 15:45:00 calfee kernel:  [<ffffffff8020b38e>] system_call+0x7e/0x83
Jul 26 15:45:00 calfee kernel: 
Jul 26 15:45:00 calfee kernel: Trying to vfree() bad address (ffffc200001f1710)
Jul 26 15:45:00 calfee kernel: WARNING: at mm/vmalloc.c:330 __vunmap()
Jul 26 15:45:00 calfee kernel: 
Jul 26 15:45:00 calfee kernel: Call Trace:
Jul 26 15:45:00 calfee kernel:  [<ffffffff8044fa69>] text_poke+0xc7/0xd2
Jul 26 15:45:00 calfee kernel:  [<ffffffff881ee42c>]
:stap_fb9cb7fbad36a1b0c2a26a0623f51ade_765:_stp_work_queue+0x0/0xc6
Jul 26 15:45:00 calfee kernel:  [<ffffffff8045184c>] unregister_kprobe+0x86/0x1d4
Jul 26 15:45:00 calfee kernel:  [<ffffffff881ee3a0>]
:stap_fb9cb7fbad36a1b0c2a26a0623f51ade_765:systemtap_module_exit+0xf1/0xf3
Jul 26 15:45:00 calfee kernel:  [<ffffffff881ee40a>]
:stap_fb9cb7fbad36a1b0c2a26a0623f51ade_765:_stp_cleanup_and_exit+0x63/0x85
Jul 26 15:45:00 calfee kernel:  [<ffffffff881ee4b2>]
:stap_fb9cb7fbad36a1b0c2a26a0623f51ade_765:_stp_work_queue+0x86/0xc6
Jul 26 15:45:00 calfee kernel:  [<ffffffff8023bbd0>] run_workqueue+0x90/0x115
Jul 26 15:45:00 calfee kernel:  [<ffffffff8023bc55>] worker_thread+0x0/0xf4
Jul 26 15:45:00 calfee kernel:  [<ffffffff8023bd3f>] worker_thread+0xea/0xf4
Jul 26 15:45:00 calfee kernel:  [<ffffffff8023f04f>]
autoremove_wake_function+0x0/0x2e
Jul 26 15:45:00 calfee kernel:  [<ffffffff8023f04f>]
autoremove_wake_function+0x0/0x2e
Jul 26 15:45:00 calfee kernel:  [<ffffffff8023eb04>] kthread+0x3d/0x63
Jul 26 15:45:00 calfee kernel:  [<ffffffff8020c1a8>] child_rip+0xa/0x12
Jul 26 15:45:00 calfee kernel:  [<ffffffff8023eac7>] kthread+0x0/0x63
Jul 26 15:45:00 calfee kernel:  [<ffffffff8020c19e>] child_rip+0x0/0x12
Jul 26 15:45:00 calfee kernel:

-- 
           Summary: Seeing vfree freeing bad address in /var/log/messages
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: wcohen at redhat dot com
  GCC host triplet: x86_64


http://sourceware.org/bugzilla/show_bug.cgi?id=4849

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