===================================================== 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_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_to_page include/linux/highmem.h:427 [inline] hfsplus_bnode_write+0xee/0x2e0 fs/hfsplus/bnode.c:83 hfsplus_brec_insert+0xa9d/0x1400 fs/hfsplus/brec.c:133 hfsplus_create_cat+0x1309/0x1840 fs/hfsplus/catalog.c:308 hfsplus_link+0x7cf/0xcb0 fs/hfsplus/dir.c:342 vfs_link+0x936/0xb60 fs/namei.c:4601 do_linkat+0x573/0x1140 fs/namei.c:4672 __do_sys_link fs/namei.c:4706 [inline] __se_sys_link fs/namei.c:4704 [inline] __ia32_sys_link+0xdc/0x130 fs/namei.c:4704 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: hfsplus_cat_build_record fs/hfsplus/catalog.c:167 [inline] hfsplus_create_cat+0x11d1/0x1840 fs/hfsplus/catalog.c:300 hfsplus_link+0x7cf/0xcb0 fs/hfsplus/dir.c:342 vfs_link+0x936/0xb60 fs/namei.c:4601 do_linkat+0x573/0x1140 fs/namei.c:4672 __do_sys_link fs/namei.c:4706 [inline] __se_sys_link fs/namei.c:4704 [inline] __ia32_sys_link+0xdc/0x130 fs/namei.c:4704 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+0x9a4/0xe00 mm/page_alloc.c:4500 alloc_pages+0xd01/0x1040 alloc_slab_page mm/slub.c:1862 [inline] allocate_slab mm/slub.c:2009 [inline] new_slab+0x41e/0x1580 mm/slub.c:2062 ___slab_alloc+0x13c3/0x33b0 mm/slub.c:3215 __slab_alloc mm/slub.c:3314 [inline] __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc_lru+0x5ee/0xa10 mm/slub.c:3501 alloc_inode_sb include/linux/fs.h:2735 [inline] hfsplus_alloc_inode+0x5a/0xc0 fs/hfsplus/super.c:627 alloc_inode+0x83/0x440 fs/inode.c:259 iget_locked+0x2dd/0xe80 fs/inode.c:1327 hfsplus_iget+0x59/0xb00 fs/hfsplus/super.c:64 hfsplus_btree_open+0x13e/0x1d20 fs/hfsplus/btree.c:150 hfsplus_fill_super+0x1113/0x26f0 fs/hfsplus/super.c:473 mount_bdev+0x4ab/0x790 fs/super.c:1391 hfsplus_mount+0x4d/0x60 fs/hfsplus/super.c:641 legacy_get_tree+0x110/0x290 fs/fs_context.c:611 vfs_get_tree+0xa5/0x500 fs/super.c:1519 do_new_mount+0x68d/0x1550 fs/namespace.c:3335 path_mount+0x73d/0x1f20 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3861 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3861 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 32-35 of 3072 are uninitialized Memory access of size 3072 starts at ffff88806374c000 Data copied to user address 000055d9f1745ba8 CPU: 1 PID: 26894 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 =====================================================