[LU-16000] llog_reader: "Segmentation fault" while reading updatelog llog record

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.2
• Labels: llog
• Environment: VMs + lustre 2.15 (ldiskfs)
• Severity: 3
• Assignee: Etienne Aujames
• Reporter: Etienne Aujames

Description

[root@mds1 update_log_dir]# llog_reader /tmp/\[0x200000401\:0x3\:0x0\]
rec #28073 type=106a0000 len=1024 offset 28452864
rec #28074 type=106a0000 len=1024 offset 28453888
rec #28075 type=106a0000 len=1024 offset 28454912
rec #28076 type=106a0000 len=1024 offset 28455936
Header size : 32768      llh_size : 424
Time : Wed Jul  6 11:18:39 2022
Number of records: 4    cat_idx: 1      last_idx: 28076
Target uuid : 
-----------------------
#28073 (1024)updatelog record master_transno:4301469635 batchid:27247 
        [0x200000401:0x2:0x0] type:delete/11 params:1 p_0:0 
        [0x200000401:0x2:0x0] type:ref_del/4 params:0 
        [0x24000040e:0x5f03:0x0] type:ref_del/4 params:0 
        [0x24000040e:0x5f03:0x0] type:ref_del/4 params:0 
        [0x200000401:0x2:0x0] type:attr_set/5 params:1 p_0:1 
        [0x24000040e:0x5f03:0x0] type:attr_set/5 params:1 p_0:2 
        [0x240000400:0x18bc:0x0] type:attr_set/5 params:1 p_0:2 
        [0x200000401:0x18bc:0x0] type:attr_set/5 params:1 p_0:2 
        [0x24000040e:0x5f03:0x0] type:ref_del/4 params:0 
        [0x24000040e:0x5f03:0x0] type:delete/11 params:1 p_0:3 
        [0x24000040e:0x5f03:0x0] type:ref_del/4 params:0 
        [0x24000040e:0x5f03:0x0] type:delete/11 params:1 p_0:4 
        [0x24000040e:0x5f03:0x0] type:destroy/2 params:0 
        [0x240000400:0x18bc:0x0] type:ref_del/4 params:0 
        [0x240000400:0x18bc:0x0] type:destroy/2 params:0 
        [0x200000401:0x18bc:0x0] type:ref_del/4 params:0 
        [0x200000401:0x18bc:0x0] type:destroy/2 params:0 
        [0x200000001:0x15:0x0] type:write/12 params:2 p_0:5 p_1:6 
        p_0 - 7/toto48
Segmentation fault (core dumped)