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BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]
BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:167 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x376/0x1c60 lib/iov_iter.c:316
 instrument_copy_to_user include/linux/instrumented.h:114 [inline]
 copyout lib/iov_iter.c:167 [inline]
 _copy_to_iter+0x376/0x1c60 lib/iov_iter.c:316
 copy_page_to_iter+0x420/0x880 lib/iov_iter.c:481
 copy_folio_to_iter include/linux/uio.h:185 [inline]
 filemap_read+0xbcc/0x1470 mm/filemap.c:2709
 blkdev_read_iter+0x6c0/0x8e0 block/fops.c:617
 call_read_iter include/linux/fs.h:1871 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x8fc/0xf50 fs/read_write.c:470
 ksys_read+0x20f/0x4c0 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+0xc4d/0x1c60 lib/iov_iter.c:316
 copy_page_to_iter+0x420/0x880 lib/iov_iter.c:481
 shmem_file_read_iter+0xac5/0x1310 mm/shmem.c:2696
 do_iter_read+0x61e/0x14a0 fs/read_write.c:795
 vfs_iter_read+0x8e/0xe0 fs/read_write.c:837
 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:1915 [inline]
 loop_process_work+0x12cf/0x39a0 drivers/block/loop.c:1950
 loop_rootcg_workfn+0x2b/0x30 drivers/block/loop.c:1981
 process_one_work+0xbf6/0x17c0 kernel/workqueue.c:2600
 worker_thread+0x107e/0x1d60 kernel/workqueue.c:2751
 kthread+0x3e8/0x540 kernel/kthread.c:389
 ret_from_fork+0x57/0x80 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Uninit was stored to memory at:
 memcpy_from_iter lib/iov_iter.c:380 [inline]
 copy_page_from_iter_atomic+0x1271/0x26d0 lib/iov_iter.c:581
 generic_perform_write+0x4b3/0xc50 mm/filemap.c:3931
 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4018
 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4044
 do_iter_write+0x60c/0x1420 fs/read_write.c:860
 vfs_iter_write+0x8e/0xe0 fs/read_write.c:901
 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:1915 [inline]
 loop_process_work+0x2076/0x39a0 drivers/block/loop.c:1950
 loop_workfn+0x48/0x60 drivers/block/loop.c:1974
 process_one_work+0xbf6/0x17c0 kernel/workqueue.c:2600
 worker_thread+0x107e/0x1d60 kernel/workqueue.c:2751
 kthread+0x3e8/0x540 kernel/kthread.c:389
 ret_from_fork+0x57/0x80 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

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+0xe52/0x8f40 fs/jfs/jfs_txnmgr.c:1255
 jfs_set_acl+0x301/0x7b0 fs/jfs/acl.c:122
 set_posix_acl fs/posix_acl.c:956 [inline]
 vfs_set_acl+0xf38/0x1270 fs/posix_acl.c:1135
 do_set_acl+0x194/0x300 fs/posix_acl.c:1280
 do_setxattr fs/xattr.c:627 [inline]
 setxattr+0x4c5/0x540 fs/xattr.c:653
 path_setxattr+0x1f5/0x3c0 fs/xattr.c:672
 __do_sys_setxattr fs/xattr.c:688 [inline]
 __se_sys_setxattr fs/xattr.c:684 [inline]
 __ia32_sys_setxattr+0xf4/0x170 fs/xattr.c:684
 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+0x1877/0x1b90 fs/jfs/xattr.c:783
 __jfs_set_acl+0x21f/0x3c0 fs/jfs/acl.c:87
 jfs_set_acl+0x490/0x7b0 fs/jfs/acl.c:115
 set_posix_acl fs/posix_acl.c:956 [inline]
 vfs_set_acl+0xf38/0x1270 fs/posix_acl.c:1135
 do_set_acl+0x194/0x300 fs/posix_acl.c:1280
 do_setxattr fs/xattr.c:627 [inline]
 setxattr+0x4c5/0x540 fs/xattr.c:653
 path_setxattr+0x1f5/0x3c0 fs/xattr.c:672
 __do_sys_setxattr fs/xattr.c:688 [inline]
 __se_sys_setxattr fs/xattr.c:684 [inline]
 __ia32_sys_setxattr+0xf4/0x170 fs/xattr.c:684
 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+0x5d/0x1b90 fs/jfs/xattr.c:660
 __jfs_set_acl+0x21f/0x3c0 fs/jfs/acl.c:87

Bytes 2153-2155 of 4096 are uninitialized
Memory access of size 4096 starts at ffff8880a6ccf000
Data copied to user address 00005642c08a9bb8

CPU: 0 PID: 5215 Comm: udevd Not tainted 6.5.0-rc7-syzkaller-00004-gf7757129e3de #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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