Re: [BUG] general protection fault in orangefs_writepages

[Mike Marshall]

Thanks for the oops report. I have a potential patch. Please
send your reproducer program.

-Mike

On Fri, Aug 28, 2026 at 2:11 AM Farhad Alemi <farhad.alemi@xxxxxxxxxxxx> wrote:
>
> Hello,
>
> As part of the kernel research at ASU's SEFCOM
> lab, we hit the crash below. Crash reports can be found here:
>
>   https://github.com/farhad-alemi/public_bug_reports/tree/main/176-general-protection-fault-in-orangefs-writepages/
>
>   Oops: general protection fault, probably for non-canonical address
> 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI
>   KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
>   RIP: 0010:orangefs_writepages_callback fs/orangefs/inode.c:144 [inline]
>   RIP: 0010:orangefs_writepages+0x642/0xc60 fs/orangefs/inode.c:205
>   Call Trace:
>    orangefs_writepages+0x642/0xc60 fs/orangefs/inode.c:205
>    do_writepages+0x328/0x550 mm/page-writeback.c:2571
>    filemap_write_and_wait_range+0x332/0x3f0 mm/filemap.c:685
>    orangefs_flush+0x44/0x60 fs/orangefs/file.c:566
>    filp_flush+0xbd/0x190 fs/open.c:1467
>    filp_close+0x1d/0x40 fs/open.c:1480
>    close_files fs/file.c:494 [inline]
>    put_files_struct+0x1b6/0x340 fs/file.c:509
>    do_exit+0x6a8/0x2360 kernel/exit.c:971
>
> Our reproducer.c is available upon request.
>
> Happy to test a patch if that would help.
>
> Regards,
>