linux-ext4 - Re: e2fsprogs.git dumpe2fs / mke2fs sigserv on sparc64

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Date:   Sat, 28 Dec 2019 21:02:23 +0300
From:   Anatoly Pugachev <matorola@...il.com>
To:     "Theodore Y. Ts'o" <tytso@....edu>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: e2fsprogs.git dumpe2fs / mke2fs sigserv on sparc64

On Sat, Dec 28, 2019 at 8:17 PM Anatoly Pugachev <matorola@...il.com> wrote:
>
> On Fri, Dec 27, 2019 at 7:49 AM Theodore Y. Ts'o <tytso@....edu> wrote:
> >
> > On Wed, Dec 18, 2019 at 03:01:03AM +0300, Anatoly Pugachev wrote:
> > > On Tue, Dec 17, 2019 at 9:01 PM Anatoly Pugachev <matorola@...il.com> wrote:
> > > >
> > > > Getting current git e2fsprogs of dumpe2fs/mke2fs (and probably others)
> > > > segfaults (via make check) with the following backtrace...
> >
> > Hi,
> >
> > Thanks for reporting this bug.  It should be fixed with this commit:
> >
> > commit c9a8c53b17ccc4543509d55ff3b343ddbfe805e5
>
> Theodore, thanks.
> This patch fixes issue with all e2fsprogs test suite.
>
> PS: there's another one which is failed:
> 366 tests succeeded     1 tests failed
>
> i_bitmaps: e2image bitmap read/write test: failed
>
>
> e2fsprogs.git$ git desc
> v1.45.4-57-g523219f2
>
> $ cd e2fsprogs.git/tests/i_bitmaps
>
> e2fsprogs.git/tests/i_bitmaps$ ulimit -c unlimited
>
> e2fsprogs.git/tests/i_bitmaps$ ../../misc/e2image /tmp/image  /tmp/image.e2i
> e2image 1.46-WIP (09-Oct-2019)
> Segmentation fault (core dumped)
>
> e2fsprogs.git/tests/i_bitmaps$ gdb -q ../../misc/e2image
> Reading symbols from ../../misc/e2image...
> (gdb) set args /tmp/image /tmp/image.e2i
> (gdb) run
> Starting program: e2fsprogs.git/misc/e2image /tmp/image /tmp/image.e2i
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/sparc64-linux-gnu/libthread_db.so.1".
> e2image 1.46-WIP (09-Oct-2019)
>
> Program received signal SIGSEGV, Segmentation fault.
> ext2fs_swap_group_desc2 (fs=0x10000148a90, gdp=0x0) at swapfs.c:145
> 145             gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap);
> (gdb) br
> Breakpoint 1 at 0x1000001bb10: file swapfs.c, line 145.

this was meant to be bt (backtrace), not br (brakepoint):

Program received signal SIGSEGV, Segmentation fault.
ext2fs_swap_group_desc2 (fs=0x10000148a90, gdp=0x0) at swapfs.c:145
145             gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap);
(gdb) bt
#0  ext2fs_swap_group_desc2 (fs=0x10000148a90, gdp=0x0) at swapfs.c:145
#1  0x00000100000080fc in ext2fs_image_super_write (fs=0x10000148a90,
fd=<optimized out>, flags=<optimized out>) at imager.c:248
#2  0x0000010000004cc8 in write_image_file (fd=<optimized out>,
fs=<optimized out>) at e2image.c:245
#3  main (argc=<optimized out>, argv=<optimized out>) at e2image.c:1717
(gdb)