netlink: 'syz.4.1016': attribute type 1 has an invalid length.
==================================================================
BUG: KCSAN: data-race in do_sync_mmap_readahead / do_sync_mmap_readahead

write to 0xffff888103f83080 of 4 bytes by task 7136 on cpu 1:
 do_sync_mmap_readahead+0x236/0x2a0 mm/filemap.c:3172
 filemap_fault+0x331/0xa60 mm/filemap.c:3313
 __do_fault+0xb6/0x200 mm/memory.c:4556
 do_cow_fault mm/memory.c:4950 [inline]
 do_fault mm/memory.c:5052 [inline]
 do_pte_missing mm/memory.c:3897 [inline]
 handle_pte_fault mm/memory.c:5380 [inline]
 __handle_mm_fault mm/memory.c:5523 [inline]
 handle_mm_fault+0x11a2/0x2a80 mm/memory.c:5688
 faultin_page mm/gup.c:1290 [inline]
 __get_user_pages+0x49d/0xf10 mm/gup.c:1589
 populate_vma_page_range mm/gup.c:2029 [inline]
 __mm_populate+0x25b/0x3b0 mm/gup.c:2132
 mm_populate include/linux/mm.h:3464 [inline]
 vm_mmap_pgoff+0x1d6/0x290 mm/util.c:578
 ksys_mmap_pgoff+0x292/0x340 mm/mmap.c:1443
 x64_sys_call+0x1835/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff888103f83080 of 4 bytes by task 7134 on cpu 0:
 do_sync_mmap_readahead+0x236/0x2a0 mm/filemap.c:3172
 filemap_fault+0x331/0xa60 mm/filemap.c:3313
 __do_fault+0xb6/0x200 mm/memory.c:4556
 do_cow_fault mm/memory.c:4950 [inline]
 do_fault mm/memory.c:5052 [inline]
 do_pte_missing mm/memory.c:3897 [inline]
 handle_pte_fault mm/memory.c:5380 [inline]
 __handle_mm_fault mm/memory.c:5523 [inline]
 handle_mm_fault+0x11a2/0x2a80 mm/memory.c:5688
 faultin_page mm/gup.c:1290 [inline]
 __get_user_pages+0x49d/0xf10 mm/gup.c:1589
 populate_vma_page_range mm/gup.c:2029 [inline]
 __mm_populate+0x25b/0x3b0 mm/gup.c:2132
 mm_populate include/linux/mm.h:3464 [inline]
 vm_mmap_pgoff+0x1d6/0x290 mm/util.c:578
 ksys_mmap_pgoff+0x292/0x340 mm/mmap.c:1443
 x64_sys_call+0x1835/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000 -> 0x00000020

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7134 Comm: syz.4.1016 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
==================================================================
syz.4.1016: attempt to access beyond end of device
loop4: rw=0, sector=263328, nr_sectors = 4 limit=164