BTRFS info (device loop1): enabling auto defrag BTRFS info (device loop1): using free space tree BTRFS info (device loop1): enabling ssd optimizations BTRFS info (device loop1): auto enabling async discard ===================================================== BUG: KMSAN: uninit-value in extent_fiemap+0x2ecf/0x5e30 fs/btrfs/extent_io.c:3408 extent_fiemap+0x2ecf/0x5e30 fs/btrfs/extent_io.c:3408 btrfs_fiemap+0x210/0x260 fs/btrfs/inode.c:7835 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x2f30/0x3cf0 fs/ioctl.c:810 __do_compat_sys_ioctl fs/ioctl.c:962 [inline] __se_compat_sys_ioctl+0x6e3/0x1000 fs/ioctl.c:910 __ia32_compat_sys_ioctl+0x93/0xd0 fs/ioctl.c:910 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was stored to memory at: read_extent_buffer fs/btrfs/extent_io.c:4652 [inline] btrfs_item_key fs/btrfs/accessors.h:489 [inline] btrfs_item_key_to_cpu fs/btrfs/accessors.h:603 [inline] extent_fiemap+0x206b/0x5e30 fs/btrfs/extent_io.c:3407 btrfs_fiemap+0x210/0x260 fs/btrfs/inode.c:7835 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x2f30/0x3cf0 fs/ioctl.c:810 __do_compat_sys_ioctl fs/ioctl.c:962 [inline] __se_compat_sys_ioctl+0x6e3/0x1000 fs/ioctl.c:910 __ia32_compat_sys_ioctl+0x93/0xd0 fs/ioctl.c:910 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: __alloc_pages+0x9f6/0xe90 mm/page_alloc.c:5615 __alloc_pages_bulk+0x1ad/0x20d0 mm/page_alloc.c:5540 alloc_pages_bulk_array include/linux/gfp.h:201 [inline] btrfs_alloc_page_array fs/btrfs/extent_io.c:852 [inline] btrfs_clone_extent_buffer+0x445/0x11e0 fs/btrfs/extent_io.c:3745 fiemap_search_slot fs/btrfs/extent_io.c:3135 [inline] extent_fiemap+0x1cbb/0x5e30 fs/btrfs/extent_io.c:3382 btrfs_fiemap+0x210/0x260 fs/btrfs/inode.c:7835 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x2f30/0x3cf0 fs/ioctl.c:810 __do_compat_sys_ioctl fs/ioctl.c:962 [inline] __se_compat_sys_ioctl+0x6e3/0x1000 fs/ioctl.c:910 __ia32_compat_sys_ioctl+0x93/0xd0 fs/ioctl.c:910 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 CPU: 0 PID: 6098 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-g81af97bdef5e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 =====================================================