Re: [syzbot] [btrfs?] WARNING in emit_fiemap_extent

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On Tue, Jun 20, 2023 at 02:34:46PM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    40f71e7cd3c6 Merge tag 'net-6.4-rc7' of git://git.kernel.o..
> git tree:       upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=166d2acf280000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=7ff8f87c7ab0e04e
> dashboard link: https://syzkaller.appspot.com/bug?extid=9992306148b06272f3bb
> compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10c65e87280000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1094a78b280000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/2dc89d5fee38/disk-40f71e7c.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/0ced5a475218/vmlinux-40f71e7c.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/d543a4f69684/bzImage-40f71e7c.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/7cde8d2312ae/mount_0.gz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+9992306148b06272f3bb@xxxxxxxxxxxxxxxxxxxxxxxxx
> 
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 5351 at fs/btrfs/extent_io.c:2824 emit_fiemap_extent+0xee/0x410

#syx fix: btrfs: fix race between ordered extent completion and fiemap




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