EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
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BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

read-write to 0xffff888237d2b9e8 of 8 bytes by task 4170 on cpu 1:
 bh_lru_install fs/buffer.c:1337 [inline]
 __find_get_block+0x42e/0x890 fs/buffer.c:1400
 bdev_getblk+0x30/0x3b0 fs/buffer.c:1425
 __getblk include/linux/buffer_head.h:380 [inline]
 sb_getblk include/linux/buffer_head.h:386 [inline]
 __ext4_get_inode_loc+0x2f7/0x910 fs/ext4/inode.c:4440
 ext4_get_inode_loc+0x65/0xe0 fs/ext4/inode.c:4568
 ext4_xattr_ibody_get+0x99/0x430 fs/ext4/xattr.c:647
 ext4_xattr_get+0xd4/0x580 fs/ext4/xattr.c:711
 ext4_xattr_security_get+0x32/0x40 fs/ext4/xattr_security.c:20
 __vfs_getxattr+0x29f/0x2b0 fs/xattr.c:423
 get_vfs_caps_from_disk+0x9f/0x310 security/commoncap.c:655
 get_file_caps security/commoncap.c:746 [inline]
 cap_bprm_creds_from_file+0x19e/0xc80 security/commoncap.c:898
 security_bprm_creds_from_file+0x3d/0x80 security/security.c:1279
 bprm_creds_from_file fs/exec.c:1692 [inline]
 begin_new_exec+0x1fd/0x10e0 fs/exec.c:1222
 load_elf_binary+0x63b/0x1a10 fs/binfmt_elf.c:1002
 search_binary_handler fs/exec.c:1767 [inline]
 exec_binprm fs/exec.c:1799 [inline]
 bprm_execve+0x4b0/0x980 fs/exec.c:1851
 kernel_execve+0x697/0x6d0 fs/exec.c:2018
 call_usermodehelper_exec_async+0x19d/0x250 kernel/umh.c:109
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffff888237d2b9e8 of 8 bytes by task 3297 on cpu 0:
 has_bh_in_lru+0x35/0x1f0 fs/buffer.c:1521
 smp_call_function_many_cond+0x305/0xbb0 kernel/smp.c:838
 on_each_cpu_cond_mask+0x3c/0x90 kernel/smp.c:1052
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1530
 kill_bdev block/bdev.c:90 [inline]
 blkdev_flush_mapping+0x9b/0x1a0 block/bdev.c:670
 blkdev_put_whole block/bdev.c:677 [inline]
 bdev_release+0x2f9/0x420 block/bdev.c:1102
 blkdev_release+0x15/0x20 block/fops.c:660
 __fput+0x17a/0x6d0 fs/file_table.c:450
 ____fput+0x1c/0x30 fs/file_table.c:478
 task_work_run+0x13a/0x1a0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xa8/0x120 kernel/entry/common.c:218
 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000000 -> 0xffff888100567c98

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3297 Comm: syz-executor Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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