================================================================== 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:1777 [inline] __hrtimer_run_queues+0x20f/0x5a0 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x5f/0x1d0 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 console_flush_all+0x51b/0x6a0 arch/x86/include/asm/irqflags.h:-1 __console_flush_and_unlock kernel/printk/printk.c:3258 [inline] console_unlock+0xa1/0x2e0 kernel/printk/printk.c:3298 vprintk_emit+0x3b5/0x580 kernel/printk/printk.c:2423 vprintk_default+0x26/0x30 kernel/printk/printk.c:2438 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x79/0xa0 kernel/printk/printk.c:2448 __ext4_error+0x248/0x320 fs/ext4/super.c:822 ext4_validate_block_bitmap+0x547/0x580 fs/ext4/balloc.c:-1 ext4_wait_block_bitmap+0xda/0x150 fs/ext4/balloc.c:591 ext4_mb_init_cache+0x2f1/0xba0 fs/ext4/mballoc.c:1421 ext4_mb_init_group+0x25b/0x3f0 fs/ext4/mballoc.c:1612 ext4_mb_load_buddy_gfp+0x72a/0x790 fs/ext4/mballoc.c:1682 ext4_mb_load_buddy fs/ext4/mballoc.c:1802 [inline] ext4_mb_find_by_goal+0xfe/0x710 fs/ext4/mballoc.c:2415 ext4_mb_regular_allocator+0x9a/0x15e0 fs/ext4/mballoc.c:2976 ext4_mb_new_blocks+0x800/0x2080 fs/ext4/mballoc.c:6295 ext4_ext_map_blocks+0xff5/0x38a0 fs/ext4/extents.c:4383 ext4_map_create_blocks fs/ext4/inode.c:609 [inline] ext4_map_blocks+0x5ee/0xd00 fs/ext4/inode.c:811 mpage_map_one_extent fs/ext4/inode.c:2374 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2468 [inline] ext4_do_writepages+0xef6/0x2750 fs/ext4/inode.c:2931 ext4_writepages+0x176/0x300 fs/ext4/inode.c:3025 do_writepages+0x1c6/0x310 mm/page-writeback.c:2604 filemap_fdatawrite_wbc mm/filemap.c:389 [inline] __filemap_fdatawrite_range+0xfb/0x140 mm/filemap.c:422 generic_fadvise+0x312/0x430 mm/fadvise.c:114 vfs_fadvise mm/fadvise.c:185 [inline] ksys_fadvise64_64 mm/fadvise.c:198 [inline] __do_sys_fadvise64 mm/fadvise.c:210 [inline] __se_sys_fadvise64 mm/fadvise.c:208 [inline] __x64_sys_fadvise64+0xcb/0x110 mm/fadvise.c:208 x64_sys_call+0x29c5/0x3000 arch/x86/include/generated/asm/syscalls_64.h:222 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff868099c0 of 8 bytes by task 31226 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:635 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678 do_shrink_slab+0x63/0x680 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:6056 [inline] shrink_node+0x6c3/0x2120 mm/vmscan.c:6095 shrink_zones mm/vmscan.c:6339 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6401 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6729 try_charge_memcg+0x383/0xa10 mm/memcontrol.c:2356 obj_cgroup_charge_pages+0xa6/0x150 mm/memcontrol.c:2799 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2843 __alloc_frozen_pages_noprof+0x188/0x360 mm/page_alloc.c:5200 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2416 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0x90/0x130 mm/mempolicy.c:2507 vm_area_alloc_pages mm/vmalloc.c:3647 [inline] __vmalloc_area_node mm/vmalloc.c:3724 [inline] __vmalloc_node_range_noprof+0x7a5/0xed0 mm/vmalloc.c:3897 __kvmalloc_node_noprof+0x483/0x670 mm/slub.c:7111 ip_set_alloc+0x24/0x30 net/netfilter/ipset/ip_set_core.c:261 hash_netiface_create+0x282/0x740 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0x3cc/0x970 net/netfilter/ipset/ip_set_core.c:1109 nfnetlink_rcv_msg+0x4c6/0x590 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2552 nfnetlink_rcv+0x167/0x16c0 net/netfilter/nfnetlink.c:669 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5c0/0x690 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x145/0x180 net/socket.c:742 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2630 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2719 x64_sys_call+0x191e/0x3000 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x000000010000ad23 -> 0x000000010000ad25 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 31226 Comm: syz.5.9276 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ==================================================================