===================================================== BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:30 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:300 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:328 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0xf0e/0x32f0 lib/iov_iter.c:185 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0xf0e/0x32f0 lib/iov_iter.c:185 copy_page_to_iter+0x43c/0x8b0 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:198 [inline] filemap_read+0x1b6e/0x2190 mm/filemap.c:2753 blkdev_read_iter+0x89d/0xa70 block/fops.c:796 new_sync_read fs/read_write.c:489 [inline] vfs_read+0x845/0xef0 fs/read_write.c:570 ksys_read fs/read_write.c:713 [inline] __do_sys_read fs/read_write.c:722 [inline] __se_sys_read fs/read_write.c:720 [inline] __x64_sys_read+0x1fb/0x4d0 fs/read_write.c:720 x64_sys_call+0x39db/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: memcpy_to_iter lib/iov_iter.c:65 [inline] iterate_bvec include/linux/iov_iter.h:123 [inline] iterate_and_advance2 include/linux/iov_iter.h:304 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x12eb/0x32f0 lib/iov_iter.c:185 copy_page_to_iter+0x43c/0x8b0 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:198 [inline] shmem_file_read_iter+0x88f/0x1070 mm/shmem.c:3412 lo_rw_aio+0x113e/0x1700 drivers/block/loop.c:-1 do_req_filebacked drivers/block/loop.c:-1 [inline] loop_handle_cmd drivers/block/loop.c:1866 [inline] loop_process_work+0xe30/0x1ee0 drivers/block/loop.c:1901 loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1932 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xb97/0x1d90 kernel/workqueue.c:3319 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400 kthread+0xd59/0xf00 kernel/kthread.c:464 ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:73 [inline] iterate_bvec include/linux/iov_iter.h:123 [inline] iterate_and_advance2 include/linux/iov_iter.h:304 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] __copy_from_iter lib/iov_iter.c:249 [inline] copy_page_from_iter_atomic+0x1710/0x37f0 lib/iov_iter.c:483 copy_folio_from_iter_atomic include/linux/uio.h:210 [inline] generic_perform_write+0x8eb/0x10c0 mm/filemap.c:4121 shmem_file_write_iter+0x2b7/0x2f0 mm/shmem.c:3464 lo_rw_aio+0x113e/0x1700 drivers/block/loop.c:-1 do_req_filebacked drivers/block/loop.c:-1 [inline] loop_handle_cmd drivers/block/loop.c:1866 [inline] loop_process_work+0xe30/0x1ee0 drivers/block/loop.c:1901 loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1932 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xb97/0x1d90 kernel/workqueue.c:3319 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400 kthread+0xd59/0xf00 kernel/kthread.c:464 ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was stored to memory at: memcpy_to_page include/linux/highmem.h:433 [inline] hfsplus_bnode_write+0x129/0x3e0 fs/hfsplus/bnode.c:89 hfsplus_brec_insert+0xaec/0x1540 fs/hfsplus/brec.c:133 hfsplus_create_cat+0x1396/0x1910 fs/hfsplus/catalog.c:308 hfsplus_link+0x79e/0xc30 fs/hfsplus/dir.c:342 vfs_link+0x8e8/0xb30 fs/namei.c:4847 do_linkat+0x4af/0x1040 fs/namei.c:4917 __do_sys_link fs/namei.c:4951 [inline] __se_sys_link fs/namei.c:4949 [inline] __ia32_sys_link+0xd7/0x140 fs/namei.c:4949 ia32_sys_call+0x3fb6/0x42c0 arch/x86/include/generated/asm/syscalls_32.h:10 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Uninit was stored to memory at: hfsplus_cat_build_record fs/hfsplus/catalog.c:167 [inline] hfsplus_create_cat+0x1748/0x1910 fs/hfsplus/catalog.c:300 hfsplus_link+0x79e/0xc30 fs/hfsplus/dir.c:342 vfs_link+0x8e8/0xb30 fs/namei.c:4847 do_linkat+0x4af/0x1040 fs/namei.c:4917 __do_sys_link fs/namei.c:4951 [inline] __se_sys_link fs/namei.c:4949 [inline] __ia32_sys_link+0xd7/0x140 fs/namei.c:4949 ia32_sys_call+0x3fb6/0x42c0 arch/x86/include/generated/asm/syscalls_32.h:10 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Uninit was created at: __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:4993 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2301 alloc_frozen_pages_noprof+0xf7/0x200 mm/mempolicy.c:2372 alloc_slab_page mm/slub.c:2468 [inline] allocate_slab+0x24d/0x1210 mm/slub.c:2632 new_slab mm/slub.c:2686 [inline] ___slab_alloc+0xfec/0x3480 mm/slub.c:3872 __slab_alloc mm/slub.c:3962 [inline] __slab_alloc_node mm/slub.c:4037 [inline] slab_alloc_node mm/slub.c:4198 [inline] kmem_cache_alloc_lru_noprof+0x922/0xed0 mm/slub.c:4229 hfsplus_alloc_inode+0x5a/0xd0 fs/hfsplus/super.c:627 alloc_inode+0x87/0x4a0 fs/inode.c:346 iget_locked+0x239/0x12d0 fs/inode.c:1439 hfsplus_iget+0x5c/0xb80 fs/hfsplus/super.c:65 hfsplus_btree_open+0x132/0x1c90 fs/hfsplus/btree.c:150 hfsplus_fill_super+0x1161/0x2740 fs/hfsplus/super.c:474 get_tree_bdev_flags+0x6e3/0x920 fs/super.c:1636 get_tree_bdev+0x38/0x50 fs/super.c:1659 hfsplus_get_tree+0x35/0x40 fs/hfsplus/super.c:640 vfs_get_tree+0xb0/0x5c0 fs/super.c:1759 do_new_mount+0x73c/0x1620 fs/namespace.c:3881 path_mount+0x6db/0x1e90 fs/namespace.c:4208 do_mount fs/namespace.c:4221 [inline] __do_sys_mount fs/namespace.c:4432 [inline] __se_sys_mount+0x6eb/0x7d0 fs/namespace.c:4409 __ia32_sys_mount+0xe2/0x150 fs/namespace.c:4409 ia32_sys_call+0x2733/0x42c0 arch/x86/include/generated/asm/syscalls_32.h:22 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Bytes 598-601 of 3072 are uninitialized Memory access of size 3072 starts at ffff88801e631000 Data copied to user address 000056271925c5b8 CPU: 1 UID: 0 PID: 10062 Comm: udevd Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 =====================================================