From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Price <anprice@redhat.com>
Date: Fri, 4 May 2018 11:06:59 +0100
Subject: [Cluster-devel] gfs2-utils: mkfs segfault with 4.16 kernel
In-Reply-To: <20180504095011.GP4608@gavran.carpriv.carnet.hr>
References: <20180504094231.GN4608@gavran.carpriv.carnet.hr>
	<20180504095011.GP4608@gavran.carpriv.carnet.hr>
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Hi Valentin,

On 04/05/18 10:50, Valentin Vidic wrote:
> On Fri, May 04, 2018 at 11:42:31AM +0200, Valentin Vidic wrote:
>> We are starting to see mkfs segfaults after updating
>> linux-libc-dev from 4.15.17-1 to 4.16.5-1 due to a
>> change in gfs2_ondisk.h.  Hope there is enough info
>> below for a fix? :)

Can you reproduce it with the master branch? Also, what is the size of 
your test file? And what architecture is this on?

Andy

> Here goes another trace:
> 
> (gdb) run -p lock_nolock -b 512 test
> Starting program: /build/gfs2-utils-7xEZHP/gfs2-utils-3.1.10/gfs2/mkfs/mkfs.gfs2 -p lock_nolock -b 512 test
> This will destroy any data on test
> Are you sure you want to proceed? [y/n] y
> Adding journals: Done
> Building resource groups: Done
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x000055555555bdc0 in brelse (bh=0x555555773730) at buf.c:108
> 108     buf.c: No such file or directory.
> (gdb) bt
> #0  0x000055555555bdc0 in brelse (bh=0x555555773730) at buf.c:108
> #1  0x00005555555599f5 in gfs2_rgrp_relse (rgd=rgd at entry=0x5555557723c0) at rgrp.c:206
> #2  0x000055555555d936 in block_alloc (sdp=sdp at entry=0x7fffffffe560, blksreq=blksreq at entry=1, state=state at entry=3, blkno=blkno at entry=0x7fffffffe160, dinode=dinode at entry=1) at fs_ops.c:197
> #3  0x000055555555df77 in lgfs2_dinode_alloc (sdp=sdp at entry=0x7fffffffe560, blksreq=blksreq at entry=1, blkno=blkno at entry=0x7fffffffe160) at fs_ops.c:204
> #4  0x000055555556128f in build_master (sdp=0x7fffffffe560) at structures.c:28
> #5  0x00005555555574fc in main (argc=<optimized out>, argv=<optimized out>) at main_mkfs.c:996
>