A fix is available
APAR status
Closed as program error.
Error description
loopmount can crash the system. The stack trace: CRASH INFORMATION: CPU 0 CSA F00000002FF47600 at time of crash, error code for LEDs: 70000000 pvthread+02C800 STACK: [00022080]abend_trap+000000 () [005982AC]slock+00054C (??, ??) [00009558].simple_lock+000058 () [06B81F94]loopdd:loop_read+000054 (??, ??, ??, ??) [005BB7E4]rdevread+0001C4 (??, ??, ??, ??, ??) [007AE27C]gno_rw@AF17_5+00005C (??, ??, ??, ??, ??) [005ADAC8]rwuio+000108 (??, ??, ??, ??, ??, ??) [005AE520]fp_rdwr+000180 (??, ??, ??, ??, ??, ??, ??, ??) [005AEED4]fp_read+000034 (??, ??, ??, ??, ??, ??) [00014F50].kernel_add_gate_cstack+000030 () [F1000000C045E524]cfs.ext:cdrbread+0000A4 (??, ??, ??, ??) [F1000000C0462F38]cfs.ext:cdrgetname+000298 (??, ??, ??, ??, ??, ??) [F1000000C0463E10]cfs.ext:cdrlookup_rrg+000290 (??, ??, ??) [F1000000C04613A0]cfs.ext:cdr_lookup+0000E0 (??, ??, ??, ??, ??, ??) [00014D70].hkey_legacy_gate+00004C () [005EA6D4]vnop_lookup+0001D4 (??, ??, ??, ??, ??, ??) [005ABDD8]lookuppn+000918 (??, ??, ??, ??, ??, ??, ??, ??) [006841F8]openpnp+000238 (??, ??, ??, ??, ??, ??, ??, ??) [00684C40]openpath+000140 (??, ??, ??, ??, ??, ??, ??, ??) [0068585C]fp_open+00009C (??, ??, ??, ??, ??, ??) [00014F50].kernel_add_gate_cstack+000030 () [06B82C60]loopdd:loop_open+000200 (??, ??, ??, ??) [005BAF00]devcopen+000480 (??, ??, ??, ??, ??) [005BBE0C]fp_opendev+0001EC (??, ??, ??, ??, ??) [00014F50].kernel_add_gate_cstack+000030 () [F1000000C045D740]cfs.ext:cdr_mount+0001C0 (??, ??) [00014D70].hkey_legacy_gate+00004C () [005F0268]vfs_mount+000028 (??, ??) [005E10D0]smount+0004F0 (??) [005E1D34]vmount+0001F4 (??, ??) [000038A4]mfspurr_sc_flih01+0000E4 () [kdb_get_virtual_memory] no real storage @ 2FF201A8 [10007B24]10007B24 () [kdb_read_mem] no real storage @ FFFFFFFFFFF5FA0 Abend reason is : ESYSERROR_SL_RECURLOCK this happens if there is already a loopmounted iso image and another loopmount does search for the image file in this already loopmounted directory. Example: /tmp/iso1 is the already mounted image cd /tmp/iso1 loopmount -i i2.iso "-V cdrfs -o ro" -m /tmp/iso2 The current work directory is /tmp/iso1 and here we try to find i2.iso.
Local fix
make sure the loopmount will not search for the image to mount in an already loopmounted directory.
Problem summary
loopmount can crash the system. this happens if there is already a loopmounted iso image and another loopmount does search for the image file in this already loopmounted directory.
Problem conclusion
Logic added to avoid the system crash.
Temporary fix
Comments
6100-07 - use AIX APAR IV58244 6100-08 - use AIX APAR IV57935 6100-09 - use AIX APAR IV51885 6100-09 - use AIX APAR IV51885 6100-09 - use AIX APAR IV51885 7100-01 - use AIX APAR IV57552 7100-02 - use AIX APAR IV47155 7100-02 - use AIX APAR IV47155 7100-03 - use AIX APAR IV51480
APAR Information
APAR number
IV51480
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2013-10-30
Closed date
2013-10-30
Last modified date
2014-08-14
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX V7.1
Fixed component ID
5765H4000
Applicable component levels
R710 PSY U860282
UP14/05/22 I 1000
PTF to Fileset Mapping
U860282 devices.loopback.rte 7.1.3.15
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Document Information
Modified date:
14 August 2014