================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff868099c0 of 8 bytes by interrupt on cpu 0: tick_do_update_jiffies64+0x113/0x1c0 kernel/time/tick-sched.c:118 tick_sched_do_timer kernel/time/tick-sched.c:232 [inline] tick_nohz_handler+0x7f/0x2d0 kernel/time/tick-sched.c:290 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x20c/0x5a0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 addrconf_ifdown+0x3d4/0xf30 net/ipv6/addrconf.c:3892 addrconf_notify+0x222/0x930 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:85 [inline] raw_notifier_call_chain+0x6f/0x1b0 kernel/notifier.c:453 call_netdevice_notifiers_info+0xae/0x100 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0xd9a/0x16a0 net/core/dev.c:11972 unregister_netdevice_many+0x19/0x20 net/core/dev.c:12036 macsec_notify+0x2f9/0x340 drivers/net/macsec.c:4490 notifier_call_chain kernel/notifier.c:85 [inline] raw_notifier_call_chain+0x6f/0x1b0 kernel/notifier.c:453 call_netdevice_notifiers_info+0xae/0x100 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0xd9a/0x16a0 net/core/dev.c:11972 rtnl_delete_link net/core/rtnetlink.c:3522 [inline] rtnl_dellink+0x3cb/0x550 net/core/rtnetlink.c:3564 rtnetlink_rcv_msg+0x5fb/0x6d0 net/core/rtnetlink.c:6955 netlink_rcv_skb+0x120/0x220 net/netlink/af_netlink.c:2534 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6982 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x59e/0x670 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x142/0x180 net/socket.c:727 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2566 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2655 x64_sys_call+0x2999/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff868099c0 of 8 bytes by task 3325 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:643 count_shadow_nodes+0x6a/0x230 mm/workingset.c:680 do_shrink_slab+0x60/0x680 mm/shrinker.c:384 shrink_slab_memcg mm/shrinker.c:550 [inline] shrink_slab+0x448/0x760 mm/shrinker.c:628 shrink_node_memcgs mm/vmscan.c:5991 [inline] shrink_node+0x6c3/0x2110 mm/vmscan.c:6030 shrink_zones mm/vmscan.c:6274 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6336 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6664 try_charge_memcg+0x3ab/0x870 mm/memcontrol.c:2302 try_charge mm/memcontrol.c:2444 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4590 __mem_cgroup_charge+0x28/0xb0 mm/memcontrol.c:4607 mem_cgroup_charge include/linux/memcontrol.h:642 [inline] filemap_add_folio+0x4e/0x1b0 mm/filemap.c:964 page_cache_ra_unbounded+0x1f3/0x380 mm/readahead.c:275 do_page_cache_ra mm/readahead.c:327 [inline] page_cache_ra_order+0x102/0x120 mm/readahead.c:532 do_sync_mmap_readahead+0x249/0x280 mm/filemap.c:3262 filemap_fault+0x311/0xb40 mm/filemap.c:3403 __do_fault+0xb9/0x200 mm/memory.c:5098 do_read_fault mm/memory.c:5518 [inline] do_fault mm/memory.c:5652 [inline] do_pte_missing mm/memory.c:4160 [inline] handle_pte_fault mm/memory.c:5997 [inline] __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0x110c/0x2ae0 mm/memory.c:6309 do_user_addr_fault+0x636/0x1090 arch/x86/mm/fault.c:1337 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x54/0xc0 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 value changed: 0x00000000ffffdf9d -> 0x00000000ffffdf9e Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3325 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller-00175-g0f8c0258bf04 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ================================================================== syz-executor invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0 CPU: 0 UID: 0 PID: 3325 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller-00175-g0f8c0258bf04 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0xe8/0x140 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 dump_header+0x81/0x220 mm/oom_kill.c:467 oom_kill_process+0x334/0x3f0 mm/oom_kill.c:1040 out_of_memory+0x979/0xb80 mm/oom_kill.c:1178 mem_cgroup_out_of_memory+0x13d/0x190 mm/memcontrol.c:1665 mem_cgroup_oom mm/memcontrol.c:1688 [inline] try_charge_memcg+0x5e2/0x870 mm/memcontrol.c:2344 try_charge mm/memcontrol.c:2444 [inline] charge_memcg+0x51/0xc0 mm/memcontrol.c:4590 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4676 __read_swap_cache_async+0x1df/0x350 mm/swap_state.c:444 swap_cluster_readahead+0x376/0x3e0 mm/swap_state.c:635 swapin_readahead+0xde/0x6f0 mm/swap_state.c:814 do_swap_page+0x301/0x2460 mm/memory.c:4532 handle_pte_fault mm/memory.c:6000 [inline] __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0xb60/0x2ae0 mm/memory.c:6309 do_user_addr_fault+0x636/0x1090 arch/x86/mm/fault.c:1337 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x54/0xc0 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f047abe11e5 Code: 00 00 00 00 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 5e 33 1c 00 00 74 14 b8 e6 00 00 00 0f 05 f7 d8 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10 89 74 RSP: 002b:00007ffe9fd42048 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000000005e4 RCX: 00007f047abe11e3 RDX: 00007ffe9fd42060 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffe9fd420cc R08: 000000002323c3d8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000001388 R13: 00000000000927c0 R14: 0000000000034e6c R15: 00007ffe9fd42120 memory: usage 307200kB, limit 307200kB, failcnt 556 memory+swap: usage 308204kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307196kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz2: cache 0 rss 0 shmem 0 mapped_file 0 dirty 0 writeback 0 workingset_refault_anon 24 workingset_refault_file 3 swap 1028096 swapcached 4096 pgpgin 90286 pgpgout 90285 pgfault 121192 pgmajfault 24 inactive_anon 4096 active_anon 0 inactive_file 0 active_file 0 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 0 total_rss 0 total_shmem 0 total_mapped_file 0 total_dirty 0 total_writeback 0 total_workingset_refault_anon 24 total_workingset_refault_file 3 total_swap 1028096 total_swapcached 4096 total_pgpgin 90286 total_pgpgout 90285 total_pgfault 121192 total_pgmajfault 24 total_inactive_anon 4096 total_active_anon 0 total_inactive_file 0 total_active_file 0 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz2,task_memcg=/syz2,task=syz.2.2827,pid=11866,uid=0 Memory cgroup out of memory: Killed process 11866 (syz.2.2827) total-vm:93748kB, anon-rss:936kB, file-rss:22248kB, shmem-rss:0kB, UID:0 pgtables:132kB oom_score_adj:1000