BTRFS info (device loop3): using crc32c (crc32c-generic) checksum algorithm
BTRFS info (device loop3): using free space tree
BTRFS info (device loop3): enabling ssd optimizations
BTRFS info (device loop3): auto enabling async discard
=====================================================
BUG: KMSAN: uninit-value in iterate_inode_refs fs/btrfs/backref.c:2551 [inline]
BUG: KMSAN: uninit-value in paths_from_inode+0xd1b/0x1f50 fs/btrfs/backref.c:2685
 iterate_inode_refs fs/btrfs/backref.c:2551 [inline]
 paths_from_inode+0xd1b/0x1f50 fs/btrfs/backref.c:2685
 btrfs_ioctl_ino_to_path+0x308/0x7a0 fs/btrfs/ioctl.c:3334
 btrfs_ioctl+0x2d8/0x10e0 fs/btrfs/ioctl.c:4589
 btrfs_compat_ioctl+0x61/0x70 fs/btrfs/ioctl.c:4701
 __do_compat_sys_ioctl fs/ioctl.c:968 [inline]
 __se_compat_sys_ioctl+0x781/0xfa0 fs/ioctl.c:910
 __ia32_compat_sys_ioctl+0x8f/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+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 __alloc_pages+0x9f1/0xe80 mm/page_alloc.c:5572
 __alloc_pages_bulk+0x1f60/0x2500 mm/page_alloc.c:5497
 alloc_pages_bulk_array include/linux/gfp.h:201 [inline]
 btrfs_alloc_page_array fs/btrfs/extent_io.c:1227 [inline]
 btrfs_clone_extent_buffer+0x441/0x11d0 fs/btrfs/extent_io.c:4199
 iterate_inode_refs fs/btrfs/backref.c:2542 [inline]
 paths_from_inode+0x22d/0x1f50 fs/btrfs/backref.c:2685
 btrfs_ioctl_ino_to_path+0x308/0x7a0 fs/btrfs/ioctl.c:3334
 btrfs_ioctl+0x2d8/0x10e0 fs/btrfs/ioctl.c:4589
 btrfs_compat_ioctl+0x61/0x70 fs/btrfs/ioctl.c:4701
 __do_compat_sys_ioctl fs/ioctl.c:968 [inline]
 __se_compat_sys_ioctl+0x781/0xfa0 fs/ioctl.c:910
 __ia32_compat_sys_ioctl+0x8f/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+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 0 PID: 14227 Comm: syz-executor.3 Not tainted 6.2.0-rc3-syzkaller-79342-g219e919e391d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
=====================================================