===================================================== BUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:30 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:302 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:330 [inline] BUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0xef3/0x33f0 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:302 [inline] iterate_and_advance include/linux/iov_iter.h:330 [inline] _copy_to_iter+0xef3/0x33f0 lib/iov_iter.c:185 copy_page_to_iter+0x482/0x910 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:204 [inline] filemap_read+0xcfd/0x2300 mm/filemap.c:2763 blkdev_read_iter+0x89f/0xb00 block/fops.c:852 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x8ea/0xf90 fs/read_write.c:572 ksys_read fs/read_write.c:715 [inline] __do_sys_read fs/read_write.c:724 [inline] __se_sys_read fs/read_write.c:722 [inline] __x64_sys_read+0x1fb/0x4d0 fs/read_write.c:722 x64_sys_call+0x2f9c/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: ntfs_write_bh+0x6ae/0xe90 fs/ntfs3/fsntfs.c:1430 mi_write+0xb4/0x2f0 fs/ntfs3/record.c:402 ni_write_inode+0xd95/0x1ca0 fs/ntfs3/frecord.c:3325 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1036 write_inode fs/fs-writeback.c:1525 [inline] __writeback_single_inode+0x88f/0x1190 fs/fs-writeback.c:1745 writeback_sb_inodes+0xac1/0x1cb0 fs/fs-writeback.c:1976 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2156 wb_do_writeback fs/fs-writeback.c:2303 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2343 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xb8e/0x1d80 kernel/workqueue.c:3319 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400 kthread+0xd59/0xf00 kernel/kthread.c:463 ret_from_fork+0x233/0x380 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was stored to memory at: al_update+0x3a9/0x570 fs/ntfs3/attrlist.c:404 ni_write_inode+0x1adc/0x1ca0 fs/ntfs3/frecord.c:3293 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1036 write_inode fs/fs-writeback.c:1525 [inline] __writeback_single_inode+0x88f/0x1190 fs/fs-writeback.c:1745 writeback_sb_inodes+0xac1/0x1cb0 fs/fs-writeback.c:1976 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2156 wb_do_writeback fs/fs-writeback.c:2303 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2343 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xb8e/0x1d80 kernel/workqueue.c:3319 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400 kthread+0xd59/0xf00 kernel/kthread.c:463 ret_from_fork+0x233/0x380 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was created at: slab_free_hook mm/slub.c:2348 [inline] slab_free mm/slub.c:4695 [inline] kfree+0x252/0xec0 mm/slub.c:4894 ieee80211_inform_bss+0x1415/0x1540 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0x1858/0x2870 net/wireless/scan.c:2380 cfg80211_inform_bss_data+0x29b/0x7e60 net/wireless/scan.c:3235 cfg80211_inform_bss_frame_data+0x6cd/0xaa0 net/wireless/scan.c:3326 ieee80211_bss_info_update+0x8a4/0xaa0 net/mac80211/scan.c:226 ieee80211_scan_rx+0xa23/0xd70 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5186 [inline] ieee80211_rx_list+0x464e/0x6630 net/mac80211/rx.c:5423 ieee80211_rx_napi+0x84/0x400 net/mac80211/rx.c:5446 ieee80211_rx include/net/mac80211.h:5210 [inline] ieee80211_handle_queued_frames+0x14f/0x350 net/mac80211/main.c:453 ieee80211_tasklet_handler+0x25/0x30 net/mac80211/main.c:472 tasklet_action_common+0x35f/0xd70 kernel/softirq.c:829 tasklet_action+0x2d/0x40 kernel/softirq.c:855 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x66/0x180 kernel/softirq.c:680 irq_exit_rcu+0x12/0x20 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x84/0x90 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 Bytes 202-207 of 1024 are uninitialized Memory access of size 1024 starts at ffff888046435000 Data copied to user address 00007faa0fd50000 CPU: 1 UID: 0 PID: 6005 Comm: udevd Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 =====================================================