loop4: detected capacity change from 0 to 164
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BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

read-write to 0xffff888237d26b30 of 8 bytes by task 12708 on cpu 1:
 bh_lru_install fs/buffer.c:1337 [inline]
 __find_get_block+0x430/0x8a0 fs/buffer.c:1400
 bdev_getblk+0x30/0x3b0 fs/buffer.c:1425
 __getblk include/linux/buffer_head.h:379 [inline]
 sb_getblk include/linux/buffer_head.h:385 [inline]
 __ext4_get_inode_loc+0x328/0x9a0 fs/ext4/inode.c:4455
 ext4_get_inode_loc+0x6a/0xe0 fs/ext4/inode.c:4583
 ext4_xattr_ibody_get+0xa0/0x2e0 fs/ext4/xattr.c:644
 ext4_xattr_get+0xf3/0x4d0 fs/ext4/xattr.c:705
 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+0xa2/0x320 security/commoncap.c:684
 get_file_caps security/commoncap.c:775 [inline]
 cap_bprm_creds_from_file+0x1a6/0xc80 security/commoncap.c:927
 security_bprm_creds_from_file+0x3d/0x80 security/security.c:1285
 bprm_creds_from_file fs/exec.c:1703 [inline]
 begin_new_exec+0x1fd/0x1150 fs/exec.c:1213
 load_elf_binary+0x65a/0x1a50 fs/binfmt_elf.c:1001
 search_binary_handler fs/exec.c:1778 [inline]
 exec_binprm fs/exec.c:1810 [inline]
 bprm_execve+0x48b/0x9c0 fs/exec.c:1862
 kernel_execve+0x694/0x6d0 fs/exec.c:2028
 call_usermodehelper_exec_async+0x19d/0x250 kernel/umh.c:109
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888237d26b30 of 8 bytes by task 12706 on cpu 0:
 has_bh_in_lru+0x35/0x1f0 fs/buffer.c:1521
 smp_call_function_many_cond+0x30a/0xbc0 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]
 set_blocksize+0x24f/0x270 block/bdev.c:175
 sb_set_blocksize+0x7e/0x100 block/bdev.c:186
 isofs_fill_super+0xa18/0x12c0 fs/isofs/inode.c:816
 get_tree_bdev_flags+0x2b4/0x330 fs/super.c:1636
 get_tree_bdev+0x1f/0x30 fs/super.c:1659
 isofs_get_tree+0x1c/0x30 fs/isofs/inode.c:1523
 vfs_get_tree+0x56/0x1e0 fs/super.c:1759
 do_new_mount+0x246/0x6b0 fs/namespace.c:3881
 path_mount+0x49b/0xb30 fs/namespace.c:4208
 do_mount fs/namespace.c:4221 [inline]
 __do_sys_mount fs/namespace.c:4432 [inline]
 __se_sys_mount+0x28f/0x2e0 fs/namespace.c:4409
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4409
 x64_sys_call+0xd11/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:166
 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: 0xffff8881058030d0 -> 0xffff88810076cb60

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 12706 Comm: syz.4.3355 Not tainted 6.15.0-rc2-syzkaller-00400-g3088d26962e8 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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