[SSI-devel] [ ssic-linux-Bugs-996897 ] Downed soft mounts can panic

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Bugs item #996897, was opened at 2004-07-23 19:32
Message generated for change (Comment added) made by rogertsang
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>Category: Filesystem
Group: None
Status: Open
>Resolution: Out of Date
Priority: 5
Private: No
Submitted By: David Zafman (dzafman)
Assigned to: Nobody/Anonymous (nobody)
Summary: Downed soft mounts can panic

Initial Comment:
0xc232c000   263493   263447  1    1   R  0xc232c420 *find                      
EBP        EIP        Function (args)
0xc232df2c 0xc023bf45 cfs_reqlist_free+0x55 (0xc32ff760, 
0xc365f000, 0xc232c000,
 0xc365f050)
                               kernel .text 
0xc0100000 0xc023bef0 0xc023bf80
0xc232df44 0xc022279f cfs_put_super+0x1f (0xc365f000, 
0xc0511360, 0xc05113cc, 0x
c127cc00, 0xc365f000)
                               kernel .text 
0xc0100000 0xc0222780 0xc02227d0
0xc232df64 0xc0158773 kill_super+0x193 (0xc365f000, 
0xc127cc00, 0xc36104e0, 0xc36c2720, 0x0)
                               kernel .text 
0xc0100000 0xc01585e0 0xc01587a0
0xc232df80 0xc016df50 __mntput+0x20 (0xc127cc00, 0xc232c000, 
0x100, 0x1)
                               kernel .text 
0xc0100000 0xc016df30 0xc016df60
0xc232df98 0xc0127b46 do_exit+0x216 (0x100, 0xc232c000, 
0x42130910, 0x1)
                               kernel .text 
0xc0100000 0xc0127930 0xc0127ce0
0xc232dfb0 0xc0127e23 do_group_exit+0x83 (0x100)
                               kernel .text 
0xc0100000 0xc0127da0 0xc0127e50
0xc232dfbc 0xc0127e61 sys_exit_group+0x11 (0x1, 0x1, 
0x4212e130, 0x42130910, 0x1
)
                               kernel .text 
0xc0100000 0xc0127e50 0xc0127e70
           0xc010b3f3 system_call+0x33
                               kernel .text 
0xc0100000 0xc010b3c0 0xc010b400

The super_block here has an a flags 0x81 which is MI_SB_DOWN | 
MI_CLEANED.  This means that the routine super_clean_node() has 
been run because it is a soft mount.  It has mi_server of 1 which is 
the node that just went down.  The super block may have already 
been killed at this point which may mean that the code isn't 
handling refcounts properly.

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>Comment By: Roger Tsang (rogertsang)
Date: 2008-01-01 20:58

Message:
Logged In: YES 
user_id=1246761
Originator: NO

Bug report is outdated (w.r.t. SSI-1.9) since we moved to newer base
kernel-2.6.

Before we close this bug we need to verify whether this problem exists in
SSI-1.9 / 2.0.0preX

----------------------------------------------------------------------

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