=====================================================
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]
BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:169 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x870/0x1fd0 lib/iov_iter.c:529
 instrument_copy_to_user include/linux/instrumented.h:121 [inline]
 copyout lib/iov_iter.c:169 [inline]
 _copy_to_iter+0x870/0x1fd0 lib/iov_iter.c:529
 copy_page_to_iter+0x49d/0xb40 lib/iov_iter.c:727
 copy_folio_to_iter include/linux/uio.h:172 [inline]
 filemap_read+0x38b0/0x43a0 mm/filemap.c:2746
 blkdev_read_iter+0xa1b/0xbc0 block/fops.c:591
 call_read_iter include/linux/fs.h:2183 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x8cd/0xf40 fs/read_write.c:470
 ksys_read+0x21f/0x4f0 fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __x64_sys_read+0x93/0xd0 fs/read_write.c:621
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was stored to memory at:
 do_journal_end+0x4bee/0x8770 fs/reiserfs/journal.c:4214
 journal_end+0x31a/0x3c0 fs/reiserfs/journal.c:3416
 restart_transaction+0x199/0x2c0 fs/reiserfs/inode.c:268
 reiserfs_get_block+0x3427/0x6c50 fs/reiserfs/inode.c:1106
 __block_write_begin_int+0x6b1/0x2670 fs/buffer.c:1991
 __block_write_begin+0xcb/0x260 fs/buffer.c:2041
 reiserfs_write_begin+0x6ec/0x1170 fs/reiserfs/inode.c:2775
 generic_cont_expand_simple+0x178/0x360 fs/buffer.c:2347
 reiserfs_setattr+0xdae/0x2280 fs/reiserfs/inode.c:3305
 notify_change+0x21ef/0x22f0 fs/attr.c:482
 do_truncate+0x240/0x2d0 fs/open.c:65
 do_sys_ftruncate+0x7ed/0xac0 fs/open.c:193
 __do_compat_sys_ftruncate fs/open.c:210 [inline]
 __se_compat_sys_ftruncate fs/open.c:208 [inline]
 __ia32_compat_sys_ftruncate+0x70/0xa0 fs/open.c:208
 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:5572
 alloc_pages+0xab0/0xd80 mm/mempolicy.c:2287
 folio_alloc+0x42/0x120 mm/mempolicy.c:2297
 filemap_alloc_folio+0xb2/0x460 mm/filemap.c:972
 __filemap_get_folio+0xe4b/0x1920 mm/filemap.c:1966
 pagecache_get_page+0x4f/0x290 mm/folio-compat.c:98
 find_or_create_page include/linux/pagemap.h:612 [inline]
 grow_dev_page fs/buffer.c:946 [inline]
 grow_buffers fs/buffer.c:1011 [inline]
 __getblk_slow fs/buffer.c:1038 [inline]
 __getblk_gfp+0x375/0x17f0 fs/buffer.c:1333
 sb_getblk include/linux/buffer_head.h:356 [inline]
 get_empty_nodes+0xa65/0xe40 fs/reiserfs/fix_node.c:890
 fix_nodes+0xb946/0x13ec0 fs/reiserfs/fix_node.c:2662
 reiserfs_paste_into_item+0x7f6/0xc30 fs/reiserfs/stree.c:2130
 reiserfs_get_block+0x30dd/0x6c50 fs/reiserfs/inode.c:1069
 __block_write_begin_int+0x6b1/0x2670 fs/buffer.c:1991
 __block_write_begin+0xcb/0x260 fs/buffer.c:2041
 reiserfs_write_begin+0x6ec/0x1170 fs/reiserfs/inode.c:2775
 generic_cont_expand_simple+0x178/0x360 fs/buffer.c:2347
 reiserfs_setattr+0xdae/0x2280 fs/reiserfs/inode.c:3305
 notify_change+0x21ef/0x22f0 fs/attr.c:482
 do_truncate+0x240/0x2d0 fs/open.c:65
 do_sys_ftruncate+0x7ed/0xac0 fs/open.c:193
 __do_compat_sys_ftruncate fs/open.c:210 [inline]
 __se_compat_sys_ftruncate fs/open.c:208 [inline]
 __ia32_compat_sys_ftruncate+0x70/0xa0 fs/open.c:208
 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

Bytes 6-23 of 512 are uninitialized
Memory access of size 512 starts at ffff88803cf50000
Data copied to user address 0000559fbc9843c8

CPU: 0 PID: 27016 Comm: udevd Tainted: G        W          6.2.0-syzkaller-81152-g97e36f4aa06f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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