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BUG: KCSAN: data-race in mem_cgroup_flush_stats / tick_do_update_jiffies64

read-write to 0xffffffff85a079c0 of 8 bytes by interrupt on cpu 0:
 tick_do_update_jiffies64+0x112/0x1b0 kernel/time/tick-sched.c:118
 tick_sched_do_timer kernel/time/tick-sched.c:210 [inline]
 tick_sched_timer+0x7b/0x2c0 kernel/time/tick-sched.c:1485
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x217/0x700 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x20d/0x7b0 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline]
 __sysvec_apic_timer_interrupt+0x52/0x190 arch/x86/kernel/apic/apic.c:1080
 sysvec_apic_timer_interrupt+0x68/0x80 arch/x86/kernel/apic/apic.c:1074
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
 kcsan_setup_watchpoint+0x3fe/0x410 kernel/kcsan/core.c:705
 batadv_nc_purge_paths+0x227/0x260 net/batman-adv/network-coding.c:437
 batadv_nc_worker+0x402/0xac0 net/batman-adv/network-coding.c:722
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703
 worker_thread+0x525/0x730 kernel/workqueue.c:2784
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

read to 0xffffffff85a079c0 of 8 bytes by task 31340 on cpu 1:
 do_flush_stats mm/memcontrol.c:653 [inline]
 mem_cgroup_flush_stats+0x5d/0xd0 mm/memcontrol.c:664
 count_shadow_nodes+0x67/0x3d0 mm/workingset.c:667
 do_shrink_slab+0x56/0x640 mm/vmscan.c:847
 shrink_slab_memcg mm/vmscan.c:969 [inline]
 shrink_slab+0x2c1/0x550 mm/vmscan.c:1048
 shrink_node_memcgs mm/vmscan.c:6507 [inline]
 shrink_node+0xaf2/0x15c0 mm/vmscan.c:6540
 shrink_zones mm/vmscan.c:6779 [inline]
 do_try_to_free_pages+0x43d/0xce0 mm/vmscan.c:6841
 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:7156
 try_charge_memcg+0x280/0xd30 mm/memcontrol.c:2691
 try_charge mm/memcontrol.c:2833 [inline]
 charge_memcg+0x51/0x200 mm/memcontrol.c:6996
 __mem_cgroup_charge+0x29/0xa0 mm/memcontrol.c:7017
 mem_cgroup_charge include/linux/memcontrol.h:686 [inline]
 __filemap_add_folio+0x48d/0x750 mm/filemap.c:857
 filemap_add_folio+0x70/0x160 mm/filemap.c:939
 __filemap_get_folio+0x31f/0x500 mm/filemap.c:1944
 ext4_da_write_begin+0x2eb/0x550 fs/ext4/inode.c:2881
 generic_perform_write+0x1c9/0x410 mm/filemap.c:3969
 ext4_buffered_write_iter+0x1f6/0x370 fs/ext4/file.c:299
 ext4_file_write_iter+0xd6/0x1200
 call_write_iter include/linux/fs.h:1956 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x4ab/0x7d0 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 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

value changed: 0x0000000100041e05 -> 0x0000000100041e06

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 31340 Comm: syz-executor.2 Tainted: G        W          6.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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