================================================================== BUG: KCSAN: data-race in __filemap_remove_folio / folio_mapping write to 0xffffea0005533358 of 8 bytes by task 12361 on cpu 1: 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:1121 shmem_fallocate+0x799/0x840 mm/shmem.c:3753 vfs_fallocate+0x410/0x450 fs/open.c:338 ksys_fallocate fs/open.c:362 [inline] __do_sys_fallocate fs/open.c:367 [inline] __se_sys_fallocate fs/open.c:365 [inline] __x64_sys_fallocate+0x7a/0xd0 fs/open.c:365 x64_sys_call+0x2b88/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:286 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 0xffffea0005533358 of 8 bytes by task 12370 on cpu 0: folio_mapping+0xa1/0x120 mm/util.c:701 folio_evictable mm/internal.h:480 [inline] evict_folios+0x2986/0x33d0 mm/vmscan.c:4708 try_to_shrink_lruvec+0x45a/0x7e0 mm/vmscan.c:4859 lru_gen_shrink_lruvec mm/vmscan.c:5008 [inline] shrink_lruvec+0x22e/0x1a40 mm/vmscan.c:5753 shrink_node_memcgs mm/vmscan.c:5989 [inline] shrink_node+0x686/0x2110 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:2304 obj_cgroup_charge_pages+0xb7/0x1a0 mm/memcontrol.c:2695 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2739 __alloc_frozen_pages_noprof+0x188/0x360 mm/page_alloc.c:4987 alloc_pages_mpol+0xb3/0x250 mm/mempolicy.c:2301 alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline] alloc_pages_noprof+0x90/0x130 mm/mempolicy.c:2392 vm_area_alloc_pages mm/vmalloc.c:3591 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0x6a4/0xdf0 mm/vmalloc.c:3844 __kvmalloc_node_noprof+0x2f3/0x4d0 mm/slub.c:5034 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+0x120/0x220 net/netlink/af_netlink.c:2534 nfnetlink_rcv+0x16b/0x1690 net/netfilter/nfnetlink.c:667 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 value changed: 0xffff8881189dcaa8 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 12370 Comm: syz.5.3424 Tainted: G W 6.15.0-rc4-syzkaller-00296-ge8ab83e34bdc #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 ================================================================== syz.5.3424 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: 12370 Comm: syz.5.3424 Tainted: G W 6.15.0-rc4-syzkaller-00296-ge8ab83e34bdc #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 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:1667 mem_cgroup_oom mm/memcontrol.c:1690 [inline] try_charge_memcg+0x5e2/0x870 mm/memcontrol.c:2346 obj_cgroup_charge_pages+0xb7/0x1a0 mm/memcontrol.c:2695 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2739 __alloc_frozen_pages_noprof+0x188/0x360 mm/page_alloc.c:4987 alloc_pages_mpol+0xb3/0x250 mm/mempolicy.c:2301 alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline] alloc_pages_noprof+0x90/0x130 mm/mempolicy.c:2392 vm_area_alloc_pages mm/vmalloc.c:3591 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0x6a4/0xdf0 mm/vmalloc.c:3844 __kvmalloc_node_noprof+0x2f3/0x4d0 mm/slub.c:5034 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+0x120/0x220 net/netlink/af_netlink.c:2534 nfnetlink_rcv+0x16b/0x1690 net/netfilter/nfnetlink.c:667 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 RIP: 0033:0x7ffa599be969 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:00007ffa58006038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ffa59be6080 RCX: 00007ffa599be969 RDX: 0000000000000800 RSI: 0000200000000040 RDI: 0000000000000004 RBP: 00007ffa59a40ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffa59be6080 R15: 00007ffd45576738 memory: usage 307200kB, limit 307200kB, failcnt 228 memory+swap: usage 307404kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307200kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: cache 0 rss 0 shmem 0 mapped_file 0 dirty 0 writeback 0 workingset_refault_anon 1187 workingset_refault_file 0 swap 208896 swapcached 0 pgpgin 58988 pgpgout 58988 pgfault 26442 pgmajfault 213 inactive_anon 0 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 1187 total_workingset_refault_file 0 total_swap 208896 total_swapcached 0 total_pgpgin 58988 total_pgpgout 58988 total_pgfault 26443 total_pgmajfault 213 total_inactive_anon 0 total_active_anon 0 total_inactive_file 0 total_active_file 0 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz5,mems_allowed=0,oom_memcg=/syz5,task_memcg=/syz5,task=syz.5.3424,pid=12359,uid=0 Memory cgroup out of memory: Killed process 12359 (syz.5.3424) total-vm:95796kB, anon-rss:936kB, file-rss:22196kB, shmem-rss:0kB, UID:0 pgtables:120kB oom_score_adj:1000