syzbot

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BUG: KCSAN: data-race in __filemap_remove_folio / folio_mapping

write to 0xffffea0004d9b8d8 of 8 bytes by task 16534 on cpu 1:
 page_cache_delete mm/filemap.c:145 [inline]
 __filemap_remove_folio+0x205/0x320 mm/filemap.c:225
 invalidate_complete_folio2 mm/truncate.c:587 [inline]
 invalidate_inode_pages2_range+0x506/0x790 mm/truncate.c:674
 __iomap_dio_rw+0x6a8/0x1100 fs/iomap/direct-io.c:579
 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:688
 ext4_dio_write_iter fs/ext4/file.c:597 [inline]
 ext4_file_write_iter+0x9e6/0x10e0 fs/ext4/file.c:708
 do_iter_write+0x4ae/0x770 fs/read_write.c:860
 vfs_iter_write+0x50/0x70 fs/read_write.c:901
 iter_file_splice_write+0x456/0x7d0 fs/splice.c:795
 do_splice_from fs/splice.c:873 [inline]
 direct_splice_actor+0x84/0xa0 fs/splice.c:1039
 splice_direct_to_actor+0x2ee/0x5f0 fs/splice.c:994
 do_splice_direct+0x104/0x180 fs/splice.c:1082
 do_sendfile+0x3b8/0x950 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffffea0004d9b8d8 of 8 bytes by task 16535 on cpu 0:
 folio_mapping+0x92/0x110 mm/util.c:775
 folio_evictable mm/internal.h:156 [inline]
 move_folios_to_lru+0x132/0x690 mm/vmscan.c:2490
 shrink_inactive_list mm/vmscan.c:2606 [inline]
 shrink_list mm/vmscan.c:2844 [inline]
 shrink_lruvec+0xd98/0x17a0 mm/vmscan.c:6280
 shrink_node_memcgs mm/vmscan.c:6467 [inline]
 shrink_node+0xaa0/0x1500 mm/vmscan.c:6502
 shrink_zones mm/vmscan.c:6737 [inline]
 do_try_to_free_pages+0x40d/0xc80 mm/vmscan.c:6799
 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:7114
 memory_high_write+0x136/0x1d0 mm/memcontrol.c:6541
 cgroup_file_write+0x16b/0x310 kernel/cgroup/cgroup.c:4071
 kernfs_fop_write_iter+0x1ca/0x2b0 fs/kernfs/file.c:334
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x47b/0x780 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0xffff88810a3c4db0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 16535 Comm: syz-executor.2 Tainted: G        W          6.4.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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