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 2804 static int emit_fiemap_extent(struct fiemap_extent_info *fieinfo, 2805 struct fiemap_cache *cache, 2806 u64 offset, u64 phys, u64 len, u32 flags) 2807 { 2808 int ret = 0; 2809 2810 /* Set at the end of extent_fiemap(). */ 2811 ASSERT((flags & FIEMAP_EXTENT_LAST) == 0); 2812 2813 if (!cache->cached) 2814 goto assign; 2815 2816 /* 2817 * Sanity check, extent_fiemap() should have ensured that new 2818 * fiemap extent won't overlap with cached one. 2819 * Not recoverable. 2820 * 2821 * NOTE: Physical address can overlap, due to compression 2822 */ 2823 if (cache->offset + cache->len > offset) { 2824 WARN_ON(1); 2825 return -EINVAL; 2826 } Either we can drop the warning as the error is handled, or there was another issue that was supposed to be caught earlier.
