syzbot

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BUG: KCSAN: data-race in __filemap_remove_folio / filemap_write_and_wait_range

read-write to 0xffff888144c7ae00 of 8 bytes by task 7962 on cpu 0:
 page_cache_delete mm/filemap.c:145 [inline]
 __filemap_remove_folio+0x216/0x2f0 mm/filemap.c:223
 __remove_mapping+0x35c/0x480 mm/vmscan.c:1379
 shrink_folio_list+0x11d4/0x1e90 mm/vmscan.c:2016
 shrink_inactive_list+0x422/0x760 mm/vmscan.c:2489
 shrink_list mm/vmscan.c:2728 [inline]
 shrink_lruvec+0x2ba/0x6f0 mm/vmscan.c:5923
 shrink_node_memcgs+0x253/0x470 mm/vmscan.c:6110
 shrink_node+0x1d7/0x930 mm/vmscan.c:6141
 shrink_zones+0x2c1/0x5d0 mm/vmscan.c:6379
 do_try_to_free_pages+0x195/0x760 mm/vmscan.c:6441
 try_to_free_mem_cgroup_pages+0x1d1/0x420 mm/vmscan.c:6756
 try_charge_memcg+0x2cc/0x9c0 mm/memcontrol.c:2681
 try_charge mm/memcontrol.c:2823 [inline]
 mem_cgroup_charge_skmem+0x4d/0x130 mm/memcontrol.c:7209
 sock_reserve_memory+0xb0/0x3a0 net/core/sock.c:1018
 sk_setsockopt+0xf7f/0x1cc0 net/core/sock.c:1518
 sock_setsockopt+0x38/0x50 net/core/sock.c:1542
 __sys_setsockopt+0x242/0x2b0 net/socket.c:2248
 __do_sys_setsockopt net/socket.c:2263 [inline]
 __se_sys_setsockopt net/socket.c:2260 [inline]
 __x64_sys_setsockopt+0x62/0x70 net/socket.c:2260
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888144c7ae00 of 8 bytes by task 7861 on cpu 1:
 mapping_needs_writeback mm/filemap.c:627 [inline]
 filemap_write_and_wait_range+0x34/0x1d0 mm/filemap.c:673
 __iomap_dio_rw+0x5dc/0x1000 fs/iomap/direct-io.c:573
 iomap_dio_rw+0x3c/0x80 fs/iomap/direct-io.c:690
 ext4_dio_write_iter fs/ext4/file.c:587 [inline]
 ext4_file_write_iter+0xa27/0x1170 fs/ext4/file.c:698
 do_iter_write+0x494/0x750 fs/read_write.c:861
 vfs_iter_write+0x4c/0x70 fs/read_write.c:902
 iter_file_splice_write+0x44a/0x7c0 fs/splice.c:686
 do_splice_from fs/splice.c:764 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:931
 splice_direct_to_actor+0x305/0x620 fs/splice.c:886
 do_splice_direct+0xfb/0x180 fs/splice.c:974
 do_sendfile+0x3bf/0x910 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64 fs/read_write.c:1309 [inline]
 __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000000000c0 -> 0x00000000000000b8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7861 Comm: syz-executor.0 Not tainted 6.1.0-rc6-syzkaller-00308-g644e9524388a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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