oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz0,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=28430,uid=0 Memory cgroup out of memory: Killed process 28445 (syz-executor.0) total-vm:49684kB, anon-rss:496kB, file-rss:8920kB, shmem-rss:0kB, UID:0 pgtables:92kB oom_score_adj:1000 ================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff860079c0 of 8 bytes by interrupt on cpu 0: tick_do_update_jiffies64+0x112/0x1b0 kernel/time/tick-sched.c:117 tick_sched_do_timer kernel/time/tick-sched.c:229 [inline] tick_nohz_handler+0x7c/0x2d0 kernel/time/tick-sched.c:287 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x210/0x7b0 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1a0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __rcu_read_lock+0x5/0x50 kernel/rcu/tree_plugin.h:401 rcu_read_lock include/linux/rcupdate.h:779 [inline] next_demotion_node+0x46/0x1c0 mm/memory-tiers.c:319 demote_folio_list mm/vmscan.c:957 [inline] shrink_folio_list+0x2114/0x2460 mm/vmscan.c:1463 shrink_inactive_list mm/vmscan.c:1926 [inline] shrink_list mm/vmscan.c:2163 [inline] shrink_lruvec+0xbbc/0x1640 mm/vmscan.c:5687 shrink_node_memcgs mm/vmscan.c:5873 [inline] shrink_node+0xa78/0x15a0 mm/vmscan.c:5908 shrink_zones mm/vmscan.c:6152 [inline] do_try_to_free_pages+0x3cc/0xca0 mm/vmscan.c:6214 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6529 try_charge_memcg+0x279/0xd10 mm/memcontrol.c:2783 try_charge mm/memcontrol.c:2931 [inline] charge_memcg mm/memcontrol.c:7284 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:7369 __read_swap_cache_async+0x2b9/0x520 mm/swap_state.c:514 swap_cluster_readahead+0x276/0x3f0 mm/swap_state.c:678 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:904 do_swap_page+0x3bb/0x15f0 mm/memory.c:4048 handle_pte_fault mm/memory.c:5303 [inline] __handle_mm_fault mm/memory.c:5441 [inline] handle_mm_fault+0x7fa/0x27e0 mm/memory.c:5606 do_user_addr_fault arch/x86/mm/fault.c:1362 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x3eb/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 read to 0xffffffff860079c0 of 8 bytes by task 2555 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x100 mm/memcontrol.c:772 count_shadow_nodes+0x69/0x3d0 mm/workingset.c:684 do_shrink_slab+0x5a/0x690 mm/shrinker.c:382 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0x4f7/0x870 mm/shrinker.c:626 shrink_node_memcgs mm/vmscan.c:5875 [inline] shrink_node+0xab2/0x15a0 mm/vmscan.c:5908 shrink_zones mm/vmscan.c:6152 [inline] do_try_to_free_pages+0x3cc/0xca0 mm/vmscan.c:6214 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6529 try_charge_memcg+0x279/0xd10 mm/memcontrol.c:2783 try_charge mm/memcontrol.c:2931 [inline] charge_memcg mm/memcontrol.c:7284 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:7369 __read_swap_cache_async+0x2b9/0x520 mm/swap_state.c:514 swap_cluster_readahead+0x276/0x3f0 mm/swap_state.c:678 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:904 do_swap_page+0x3bb/0x15f0 mm/memory.c:4048 handle_pte_fault mm/memory.c:5303 [inline] __handle_mm_fault mm/memory.c:5441 [inline] handle_mm_fault+0x7fa/0x27e0 mm/memory.c:5606 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x2f5/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 __get_user_8+0x11/0x20 arch/x86/lib/getuser.S:85 rseq_get_rseq_cs kernel/rseq.c:161 [inline] rseq_ip_fixup kernel/rseq.c:281 [inline] __rseq_handle_notify_resume+0xc8/0xc00 kernel/rseq.c:329 rseq_handle_notify_resume include/linux/rseq.h:38 [inline] resume_user_mode_work include/linux/resume_user_mode.h:62 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0xcb/0x130 kernel/entry/common.c:231 irqentry_exit+0x12/0x50 kernel/entry/common.c:334 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 value changed: 0x0000000100015c6f -> 0x0000000100015c70 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2555 Comm: syz-executor.0 Tainted: G W 6.9.0-rc3-syzkaller-00011-g20cb38a7af88 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ================================================================== syz-executor.0 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 0 PID: 2555 Comm: syz-executor.0 Tainted: G W 6.9.0-rc3-syzkaller-00011-g20cb38a7af88 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf2/0x150 lib/dump_stack.c:114 dump_stack+0x15/0x20 lib/dump_stack.c:123 dump_header+0x83/0x2d0 mm/oom_kill.c:462 oom_kill_process+0x33e/0x4c0 mm/oom_kill.c:1036 out_of_memory+0x9cb/0xc00 mm/oom_kill.c:1174 mem_cgroup_out_of_memory+0x13e/0x190 mm/memcontrol.c:1817 mem_cgroup_oom mm/memcontrol.c:2047 [inline] try_charge_memcg+0x752/0xd10 mm/memcontrol.c:2831 try_charge mm/memcontrol.c:2931 [inline] charge_memcg mm/memcontrol.c:7284 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:7369 __read_swap_cache_async+0x2b9/0x520 mm/swap_state.c:514 swap_cluster_readahead+0x276/0x3f0 mm/swap_state.c:678 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:904 do_swap_page+0x3bb/0x15f0 mm/memory.c:4048 handle_pte_fault mm/memory.c:5303 [inline] __handle_mm_fault mm/memory.c:5441 [inline] handle_mm_fault+0x7fa/0x27e0 mm/memory.c:5606 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x2f5/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__get_user_8+0x11/0x20 arch/x86/lib/getuser.S:88 Code: ca c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 89 c2 48 c1 fa 3f 48 09 d0 0f 01 cb <48> 8b 10 31 c0 0f 01 ca c3 cc cc cc cc 66 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000e8be58 EFLAGS: 00050202 RAX: 0000555569315da8 RBX: ffffc90000e8be60 RCX: ffffffff814a1df4 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888100f85c68 RBP: ffffc90000e8bf20 R08: 0001888100f85c6f R09: 0000000000000000 R10: 0001ffffffffffff R11: 0001c90000e8bee8 R12: ffff888100f85280 R13: ffff888100f85c68 R14: ffffc90000e8bf58 R15: ffffc90000e8bfd8 rseq_get_rseq_cs kernel/rseq.c:161 [inline] rseq_ip_fixup kernel/rseq.c:281 [inline] __rseq_handle_notify_resume+0xc8/0xc00 kernel/rseq.c:329 rseq_handle_notify_resume include/linux/rseq.h:38 [inline] resume_user_mode_work include/linux/resume_user_mode.h:62 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0xcb/0x130 kernel/entry/common.c:231 irqentry_exit+0x12/0x50 kernel/entry/common.c:334 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fe5629f1bde Code: d2 0f 84 65 01 00 00 83 c0 01 41 39 c2 75 da 89 e8 25 ff 1f 00 00 41 89 2c 86 89 ef 41 83 c4 01 e8 67 e6 fe ff 83 44 24 08 01 <44> 3b 63 04 0f 82 37 ff ff ff 44 8b 4c 24 08 48 8b 2c 24 49 89 df RSP: 002b:00007ffdca570540 EFLAGS: 00010202 RAX: 0000001b31522bb0 RBX: 00007fe562b64018 RCX: 0000001b31520000 RDX: 0000001b31522bb4 RSI: 0000000080000000 RDI: 00000000819ea4b3 RBP: 00000000819ea4b3 R08: 0000001b31920000 R09: 00000000000004b3 R10: 00000000819ea4b7 R11: 0000000000037f4e R12: 0000000000000007 R13: 0000000000000001 R14: 00007fe562b58000 R15: ffffffff819ead4a memory: usage 307200kB, limit 307200kB, failcnt 33263 memory+swap: usage 307876kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307184kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: cache 8192 rss 0 shmem 0 mapped_file 0 dirty 0 writeback 0 workingset_refault_anon 1126 workingset_refault_file 151 swap 692224 swapcached 8192 pgpgin 714619 pgpgout 714615 pgfault 886814 pgmajfault 414 inactive_anon 8192 active_anon 0 inactive_file 0 active_file 8192 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 8192 total_rss 0 total_shmem 0 total_mapped_file 0 total_dirty 0 total_writeback 0 total_workingset_refault_anon 1126 total_workingset_refault_file 151 total_swap 692224 total_swapcached 8192 total_pgpgin 714619 total_pgpgout 714615 total_pgfault 886814 total_pgmajfault 414 total_inactive_anon 8192 total_active_anon 0 total_inactive_file 0 total_active_file 8192 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz0,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=2555,uid=0 Memory cgroup out of memory: Killed process 2555 (syz-executor.0) total-vm:46344kB, anon-rss:384kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:80kB oom_score_adj:1000 ---------------- Code disassembly (best guess): 0: ca c3 cc lret $0xccc3 3: cc int3 4: cc int3 5: cc int3 6: 0f 1f 00 nopl (%rax) 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: f3 0f 1e fa endbr64 1d: 48 89 c2 mov %rax,%rdx 20: 48 c1 fa 3f sar $0x3f,%rdx 24: 48 09 d0 or %rdx,%rax 27: 0f 01 cb stac * 2a: 48 8b 10 mov (%rax),%rdx <-- trapping instruction 2d: 31 c0 xor %eax,%eax 2f: 0f 01 ca clac 32: c3 ret 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 66 90 xchg %ax,%ax 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop