ldm_parse_privhead(): Cannot find PRIVHEAD structure. LDM database is corrupt. Aborting.
ldm_validate_privheads(): Cannot find PRIVHEAD 1.
 loop5: p2 < >
==================================================================
BUG: KCSAN: data-race in activate_page / lru_add_drain_all

write to 0xffff88812c128cc0 of 1 bytes by task 643 on cpu 1:
 pagevec_add include/linux/pagevec.h:81 [inline]
 activate_page+0x1a4/0x2d0 mm/swap.c:360
 mark_page_accessed+0x20e/0x340 mm/swap.c:442
 zap_pte_range+0x5e6/0x1630 mm/memory.c:1088
 zap_pmd_range mm/memory.c:1195 [inline]
 zap_pud_range mm/memory.c:1224 [inline]
 zap_p4d_range mm/memory.c:1245 [inline]
 unmap_page_range+0x751/0x870 mm/memory.c:1266
 unmap_single_vma+0x157/0x210 mm/memory.c:1311
 unmap_vmas+0xc0/0x150 mm/memory.c:1343
 exit_mmap+0x1c7/0x3b0 mm/mmap.c:3183
 __mmput+0xa2/0x220 kernel/fork.c:1076
 mmput+0x38/0x40 kernel/fork.c:1097
 exit_mm+0x2c8/0x330 kernel/exit.c:483
 do_exit+0x40f/0x16c0 kernel/exit.c:793
 do_group_exit+0xcb/0x180 kernel/exit.c:903
 get_signal+0xe9f/0x1650 kernel/signal.c:2757
 arch_do_signal+0x25/0x270 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:136 [inline]
 exit_to_user_mode_prepare+0x124/0x210 kernel/entry/common.c:167
 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:242
 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88812c128cc0 of 1 bytes by task 5076 on cpu 0:
 pagevec_count include/linux/pagevec.h:68 [inline]
 need_activate_page_drain mm/swap.c:348 [inline]
 lru_add_drain_all+0x20b/0x3b0 mm/swap.c:801
 invalidate_bdev+0x50/0x70 fs/block_dev.c:96
 blk_drop_partitions+0x5c/0x1e0 block/partitions/core.c:633
 bdev_disk_changed+0x88/0x320 fs/block_dev.c:1392
 blkdev_reread_part block/ioctl.c:103 [inline]
 blkdev_common_ioctl+0xd00/0x10b0 block/ioctl.c:549
 blkdev_ioctl+0x167/0x410 block/ioctl.c:618
 block_ioctl+0x6d/0x80 fs/block_dev.c:1871
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5076 Comm: systemd-udevd Not tainted 5.9.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================