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BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

read-write to 0xffff888237c2bb28 of 8 bytes by task 25810 on cpu 0:
 bh_lru_install fs/buffer.c:1343 [inline]
 __find_get_block+0x434/0x8a0 fs/buffer.c:1406
 bdev_getblk+0x30/0x3b0 fs/buffer.c:1431
 __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:1280
 bprm_creds_from_file fs/exec.c:1673 [inline]
 begin_new_exec+0x207/0x10b0 fs/exec.c:1228
 load_elf_binary+0x63b/0x19e0 fs/binfmt_elf.c:1002
 search_binary_handler fs/exec.c:1752 [inline]
 exec_binprm fs/exec.c:1794 [inline]
 bprm_execve+0x4e6/0xc30 fs/exec.c:1845
 kernel_execve+0x697/0x6d0 fs/exec.c:2012
 call_usermodehelper_exec_async+0x19d/0x250 kernel/umh.c:109
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffff888237c2bb28 of 8 bytes by task 21953 on cpu 1:
 has_bh_in_lru+0x35/0x1f0 fs/buffer.c:1527
 smp_call_function_many_cond+0x2d5/0xc20 kernel/smp.c:837
 on_each_cpu_cond_mask+0x3c/0x90 kernel/smp.c:1051
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1536
 invalidate_bdev+0x42/0x70 block/bdev.c:100
 ext4_put_super+0x571/0x840 fs/ext4/super.c:1356
 generic_shutdown_super+0xe5/0x220 fs/super.c:642
 kill_block_super+0x2a/0x70 fs/super.c:1710
 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7379
 deactivate_locked_super+0x7d/0x1c0 fs/super.c:473
 deactivate_super+0x9f/0xb0 fs/super.c:506
 cleanup_mnt+0x268/0x2e0 fs/namespace.c:1373
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1380
 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: 0xffff8881064ff068 -> 0xffff888100608bc8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 21953 Comm: syz-executor Not tainted 6.12.0-syzkaller-01782-gbf9aa14fc523 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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