syzbot

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BUG: KCSAN: data-race in __filemap_remove_folio / folio_mapping

write to 0xffffea0004620d58 of 8 bytes by task 13749 on cpu 1:
 page_cache_delete mm/filemap.c:152 [inline]
 __filemap_remove_folio+0x1ac/0x2c0 mm/filemap.c:232
 filemap_remove_folio+0x6b/0x1f0 mm/filemap.c:264
 truncate_inode_folio+0x42/0x50 mm/truncate.c:162
 shmem_undo_range+0x25b/0xa70 mm/shmem.c:1036
 shmem_truncate_range mm/shmem.c:1152 [inline]
 shmem_evict_inode+0x14d/0x530 mm/shmem.c:1280
 evict+0x2f0/0x570 fs/inode.c:796
 iput_final fs/inode.c:1946 [inline]
 iput+0x42a/0x5b0 fs/inode.c:1972
 dentry_unlink_inode+0x24f/0x260 fs/dcache.c:422
 __dentry_kill+0x18b/0x4c0 fs/dcache.c:625
 dput+0x5c/0xd0 fs/dcache.c:867
 __fput+0x3fb/0x6d0 fs/file_table.c:458
 ____fput+0x1c/0x30 fs/file_table.c:478
 task_work_run+0x13a/0x1a0 kernel/task_work.c:239
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x5dd/0x17f0 kernel/exit.c:938
 do_group_exit+0x102/0x150 kernel/exit.c:1087
 get_signal+0xeb9/0x1000 kernel/signal.c:3017
 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 irqentry_exit_to_user_mode+0xa7/0x120 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

read to 0xffffea0004620d58 of 8 bytes by task 13776 on cpu 0:
 folio_mapping+0xa0/0x120 mm/util.c:847
 folio_evictable mm/internal.h:435 [inline]
 move_folios_to_lru+0x12a/0x680 mm/vmscan.c:1844
 evict_folios+0x2a21/0x3240 mm/vmscan.c:4630
 try_to_shrink_lruvec+0x5d2/0x750 mm/vmscan.c:4789
 lru_gen_shrink_lruvec mm/vmscan.c:4938 [inline]
 shrink_lruvec+0x22d/0x1840 mm/vmscan.c:5693
 shrink_node_memcgs mm/vmscan.c:5929 [inline]
 shrink_node+0x603/0x1d80 mm/vmscan.c:5970
 shrink_zones mm/vmscan.c:6215 [inline]
 do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6277
 try_to_free_mem_cgroup_pages+0x1e3/0x490 mm/vmscan.c:6609
 try_charge_memcg+0x2bc/0x7f0 mm/memcontrol.c:2238
 obj_cgroup_charge_pages+0xbd/0x1a0 mm/memcontrol.c:2646
 __memcg_kmem_charge_page+0x9d/0x170 mm/memcontrol.c:2673
 __alloc_pages_noprof+0x1bc/0x340 mm/page_alloc.c:4768
 alloc_pages_mpol_noprof+0xb1/0x1e0 mm/mempolicy.c:2269
 alloc_pages_noprof+0xe1/0x100 mm/mempolicy.c:2348
 vm_area_alloc_pages mm/vmalloc.c:3589 [inline]
 __vmalloc_area_node mm/vmalloc.c:3667 [inline]
 __vmalloc_node_range_noprof+0x6eb/0xe80 mm/vmalloc.c:3844
 __kvmalloc_node_noprof+0x121/0x170 mm/util.c:672
 ip_set_alloc+0x1f/0x30 net/netfilter/ipset/ip_set_core.c:261
 hash_netiface_create+0x273/0x730 net/netfilter/ipset/ip_set_hash_gen.h:1568
 ip_set_create+0x359/0x8a0 net/netfilter/ipset/ip_set_core.c:1109
 nfnetlink_rcv_msg+0x4a9/0x570 net/netfilter/nfnetlink.c:302
 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2542
 nfnetlink_rcv+0x16c/0x15d0 net/netfilter/nfnetlink.c:667
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:726
 ____sys_sendmsg+0x312/0x410 net/socket.c:2583
 ___sys_sendmsg net/socket.c:2637 [inline]
 __sys_sendmsg+0x19d/0x230 net/socket.c:2669
 __do_sys_sendmsg net/socket.c:2674 [inline]
 __se_sys_sendmsg net/socket.c:2672 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2672
 x64_sys_call+0x2734/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffff8881041c7358 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 13776 Comm: syz.6.3285 Not tainted 6.13.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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syz.6.3285 (13776) used greatest stack depth: 6112 bytes left