syzbot

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BUG: KCSAN: data-race in __filemap_remove_folio / invalidate_bdev

read-write to 0xffff8881004c11f0 of 8 bytes by task 16440 on cpu 0:
 page_cache_delete mm/filemap.c:146 [inline]
 __filemap_remove_folio+0x1c7/0x2c0 mm/filemap.c:224
 __remove_mapping+0x33f/0x470 mm/vmscan.c:813
 remove_mapping+0x22/0x90 mm/vmscan.c:846
 mapping_evict_folio mm/truncate.c:310 [inline]
 mapping_try_invalidate+0x267/0x3f0 mm/truncate.c:531
 invalidate_mapping_pages+0x27/0x40 mm/truncate.c:573
 invalidate_bdev+0x58/0x70 block/bdev.c:102
 loop_set_status+0x12b/0x5d0 drivers/block/loop.c:1211
 lo_ioctl+0x81a/0x15e0 drivers/block/loop.c:-1
 blkdev_ioctl+0x35b/0x450 block/ioctl.c:698
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xc9/0x140 fs/ioctl.c:892
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:892
 x64_sys_call+0x168d/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881004c11f0 of 8 bytes by task 15547 on cpu 1:
 invalidate_bdev+0x25/0x70 block/bdev.c:99
 bdev_disk_changed+0xe1/0xcd0 block/partitions/core.c:657
 blkdev_get_whole+0x1eb/0x2d0 block/bdev.c:710
 bdev_open+0x289/0x860 block/bdev.c:919
 blkdev_open+0x258/0x290 block/fops.c:652
 do_dentry_open+0x621/0xa20 fs/open.c:956
 vfs_open+0x38/0x1e0 fs/open.c:1086
 do_open fs/namei.c:3845 [inline]
 path_openat+0x1b1c/0x2000 fs/namei.c:4004
 do_filp_open+0x115/0x240 fs/namei.c:4031
 do_sys_openat2+0xaa/0x110 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0xf8/0x120 fs/open.c:1455
 x64_sys_call+0x1ac/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000000005c0 -> 0x00000000000005ba

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 15547 Comm: syz-executor Not tainted 6.15.0-rc2-syzkaller-00404-g8560697b23dc #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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