=====================================================
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:
 _copy_to_iter+0xdc2/0x1fd0 lib/iov_iter.c:529
 copy_page_to_iter+0x49d/0xb40 lib/iov_iter.c:727
 shmem_file_read_iter+0xb0f/0x1380 mm/shmem.c:2676
 do_iter_read+0x642/0x1300 fs/read_write.c:796
 vfs_iter_read+0x88/0xe0 fs/read_write.c:838
 lo_read_simple drivers/block/loop.c:290 [inline]
 do_req_filebacked drivers/block/loop.c:500 [inline]
 loop_handle_cmd drivers/block/loop.c:1873 [inline]
 loop_process_work+0x2e95/0x3ba0 drivers/block/loop.c:1908
 loop_rootcg_workfn+0x2b/0x30 drivers/block/loop.c:1939
 process_one_work+0xb0d/0x1410 kernel/workqueue.c:2289
 worker_thread+0x107b/0x1d60 kernel/workqueue.c:2436
 kthread+0x31f/0x430 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Uninit was stored to memory at:
 copy_page_from_iter_atomic+0x1255/0x27f0 lib/iov_iter.c:821
 generic_perform_write+0x4b2/0xbf0 mm/filemap.c:3781
 __generic_file_write_iter+0x393/0x920 mm/filemap.c:3901
 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:3933
 do_iter_write+0xc70/0x1310 fs/read_write.c:861
 vfs_iter_write+0x88/0xe0 fs/read_write.c:902
 lo_write_bvec drivers/block/loop.c:249 [inline]
 lo_write_simple drivers/block/loop.c:271 [inline]
 do_req_filebacked drivers/block/loop.c:495 [inline]
 loop_handle_cmd drivers/block/loop.c:1873 [inline]
 loop_process_work+0x1643/0x3ba0 drivers/block/loop.c:1908
 loop_workfn+0x48/0x60 drivers/block/loop.c:1932
 process_one_work+0xb0d/0x1410 kernel/workqueue.c:2289
 worker_thread+0x107b/0x1d60 kernel/workqueue.c:2436
 kthread+0x31f/0x430 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Uninit was stored to memory at:
 copy_to_dinode+0x88d/0xb40 fs/jfs/jfs_imap.c:3148
 diWrite+0x1bf0/0x1f00 fs/jfs/jfs_imap.c:786
 txCommit+0xf20/0x9760 fs/jfs/jfs_txnmgr.c:1250
 __jfs_xattr_set+0x1d3/0x210 fs/jfs/xattr.c:919
 jfs_xattr_set+0x79/0x90 fs/jfs/xattr.c:941
 __vfs_setxattr+0x7aa/0x8b0 fs/xattr.c:202
 __vfs_setxattr_noperm+0x24f/0xa30 fs/xattr.c:236
 __vfs_setxattr_locked+0x441/0x480 fs/xattr.c:297
 vfs_setxattr+0x2a5/0x680 fs/xattr.c:323
 do_setxattr fs/xattr.c:608 [inline]
 setxattr+0x514/0x610 fs/xattr.c:631
 path_setxattr+0x202/0x3f0 fs/xattr.c:650
 __do_sys_setxattr fs/xattr.c:666 [inline]
 __se_sys_setxattr fs/xattr.c:662 [inline]
 __ia32_sys_setxattr+0xf4/0x170 fs/xattr.c:662
 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:
 ea_put fs/jfs/xattr.c:637 [inline]
 __jfs_setxattr+0x1925/0x1c50 fs/jfs/xattr.c:783
 __jfs_xattr_set+0xf3/0x210 fs/jfs/xattr.c:917
 jfs_xattr_set+0x79/0x90 fs/jfs/xattr.c:941
 __vfs_setxattr+0x7aa/0x8b0 fs/xattr.c:202
 __vfs_setxattr_noperm+0x24f/0xa30 fs/xattr.c:236
 __vfs_setxattr_locked+0x441/0x480 fs/xattr.c:297
 vfs_setxattr+0x2a5/0x680 fs/xattr.c:323
 do_setxattr fs/xattr.c:608 [inline]
 setxattr+0x514/0x610 fs/xattr.c:631
 path_setxattr+0x202/0x3f0 fs/xattr.c:650
 __do_sys_setxattr fs/xattr.c:666 [inline]
 __se_sys_setxattr fs/xattr.c:662 [inline]
 __ia32_sys_setxattr+0xf4/0x170 fs/xattr.c:662
 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

Local variable ea_buf created at:
 __jfs_setxattr+0x67/0x1c50 fs/jfs/xattr.c:660
 __jfs_xattr_set+0xf3/0x210 fs/jfs/xattr.c:917

Bytes 3689-3691 of 4096 are uninitialized
Memory access of size 4096 starts at ffff8880a68c3000
Data copied to user address 000055ee9884d4b8

CPU: 1 PID: 9142 Comm: udevd Not tainted 6.2.0-syzkaller-81151-g224e1375d540 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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