================================================================== BUG: KCSAN: data-race in __filemap_remove_folio / folio_mapping write to 0xffffea000498ddd8 of 8 bytes by task 15071 on cpu 0: page_cache_delete mm/filemap.c:144 [inline] __filemap_remove_folio+0x1a5/0x2a0 mm/filemap.c:224 filemap_remove_folio+0x6d/0x1d0 mm/filemap.c:253 truncate_inode_folio+0x42/0x50 mm/truncate.c:176 shmem_undo_range+0x244/0xa80 mm/shmem.c:1153 shmem_truncate_range mm/shmem.c:1269 [inline] shmem_evict_inode+0x134/0x520 mm/shmem.c:1397 evict+0x2e0/0x550 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x447/0x5b0 fs/inode.c:1923 dentry_unlink_inode+0x24f/0x260 fs/dcache.c:466 __dentry_kill+0x18d/0x4b0 fs/dcache.c:669 dput+0x5e/0xd0 fs/dcache.c:911 __fput+0x444/0x650 fs/file_table.c:476 ____fput+0x1c/0x30 fs/file_table.c:496 task_work_run+0x12e/0x1a0 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x483/0x15c0 kernel/exit.c:961 __do_sys_exit kernel/exit.c:1069 [inline] __se_sys_exit kernel/exit.c:1067 [inline] __x64_sys_exit+0x1f/0x20 kernel/exit.c:1067 x64_sys_call+0x2fca/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:61 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 0xffffea000498ddd8 of 8 bytes by task 15053 on cpu 1: folio_mapping+0xa1/0x120 mm/util.c:702 folio_evictable mm/internal.h:499 [inline] sort_folio mm/vmscan.c:4479 [inline] scan_folios mm/vmscan.c:4606 [inline] isolate_folios mm/vmscan.c:4702 [inline] evict_folios+0xdd9/0x3520 mm/vmscan.c:4732 try_to_shrink_lruvec+0x5b5/0x950 mm/vmscan.c:4907 lru_gen_shrink_lruvec mm/vmscan.c:5056 [inline] shrink_lruvec+0x22e/0x1b50 mm/vmscan.c:5815 shrink_node_memcgs mm/vmscan.c:6051 [inline] shrink_node+0x686/0x2120 mm/vmscan.c:6092 shrink_zones mm/vmscan.c:6336 [inline] do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6398 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6726 try_charge_memcg+0x358/0x9e0 mm/memcontrol.c:2357 obj_cgroup_charge_pages+0xa6/0x150 mm/memcontrol.c:2800 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2844 __alloc_frozen_pages_noprof+0x188/0x360 mm/page_alloc.c:5165 alloc_pages_mpol+0xb3/0x250 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:3642 [inline] __vmalloc_area_node mm/vmalloc.c:3720 [inline] __vmalloc_node_range_noprof+0x6f2/0xe00 mm/vmalloc.c:3893 __kvmalloc_node_noprof+0x30f/0x4e0 mm/slub.c:5089 ip_set_alloc+0x1f/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+0x3c9/0x960 net/netfilter/ipset/ip_set_core.c:1109 nfnetlink_rcv_msg+0x4c3/0x590 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2552 nfnetlink_rcv+0x16b/0x1690 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5bd/0x690 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x142/0x180 net/socket.c:729 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2614 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2703 x64_sys_call+0x191e/0x2ff0 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: 0xffff888109a0e1e8 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 15053 Comm: syz.8.3176 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 ================================================================== syz.8.3176 invoked oom-killer: gfp_mask=0x402dc2(GFP_KERNEL_ACCOUNT|__GFP_HIGHMEM|__GFP_ZERO|__GFP_NOWARN), order=0, oom_score_adj=1000 CPU: 1 UID: 0 PID: 15053 Comm: syz.8.3176 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 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+0x342/0x400 mm/oom_kill.c:1040 out_of_memory+0x979/0xb80 mm/oom_kill.c:1178 mem_cgroup_out_of_memory mm/memcontrol.c:1649 [inline] mem_cgroup_oom mm/memcontrol.c:1672 [inline] try_charge_memcg+0x5e6/0x9e0 mm/memcontrol.c:2399 obj_cgroup_charge_pages+0xa6/0x150 mm/memcontrol.c:2800 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2844 __alloc_frozen_pages_noprof+0x188/0x360 mm/page_alloc.c:5165 alloc_pages_mpol+0xb3/0x250 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:3642 [inline] __vmalloc_area_node mm/vmalloc.c:3720 [inline] __vmalloc_node_range_noprof+0x6f2/0xe00 mm/vmalloc.c:3893 __kvmalloc_node_noprof+0x30f/0x4e0 mm/slub.c:5089 ip_set_alloc+0x1f/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+0x3c9/0x960 net/netfilter/ipset/ip_set_core.c:1109 nfnetlink_rcv_msg+0x4c3/0x590 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2552 nfnetlink_rcv+0x16b/0x1690 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5bd/0x690 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x142/0x180 net/socket.c:729 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2614 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2703 x64_sys_call+0x191e/0x2ff0 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 RIP: 0033:0x7f4e18d3ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4e177a7038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4e18f75fa0 RCX: 00007f4e18d3ebe9 RDX: 0000000000000800 RSI: 0000200000000040 RDI: 0000000000000003 RBP: 00007f4e18dc1e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4e18f76038 R14: 00007f4e18f75fa0 R15: 00007fffb62078c8 memory: usage 307200kB, limit 307200kB, failcnt 1915 memory+swap: usage 324596kB, limit 9007199254740988kB, failcnt 0 kmem: usage 299952kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz8: cache 7417856 rss 0 shmem 7417856 mapped_file 0 dirty 0 writeback 0 workingset_refault_anon 2294 workingset_refault_file 0 swap 17813504 swapcached 0 pgpgin 301188 pgpgout 299376 pgfault 322152 pgmajfault 373 inactive_anon 1380352 active_anon 1843200 inactive_file 0 active_file 0 unevictable 4194304 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 7417856 total_rss 0 total_shmem 7417856 total_mapped_file 0 total_dirty 0 total_writeback 0 total_workingset_refault_anon 2294 total_workingset_refault_file 0 total_swap 17813504 total_swapcached 0 total_pgpgin 301188 total_pgpgout 299376 total_pgfault 322152 total_pgmajfault 373 total_inactive_anon 1380352 total_active_anon 1843200 total_inactive_file 0 total_active_file 0 total_unevictable 4194304 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz8,task_memcg=/syz8,task=syz.8.3176,pid=15052,uid=0 Memory cgroup out of memory: Killed process 15052 (syz.8.3176) total-vm:96008kB, anon-rss:1140kB, file-rss:22328kB, shmem-rss:0kB, UID:0 pgtables:148kB oom_score_adj:1000 syz.8.3176 (15053) used greatest stack depth: 6400 bytes left