race in ext2_file_write

[Oliver Neukum]

Hi,

is it possible, that there is a race in ext2_file_write ?

Are the following events possible ?

CPU1                            CPU2
sys_write
ext2_file_write
generic_file_write
                                executing binary written to by CPU1
remove_suid

I checked there is no lock_kernel() in sys_write.

        Regards
                Oliver Neukum