Re: [PATCH (2.4)] atomic use count for proc_dir_entry

[Francois romieu]

CPU A: assume de->count = 1 (in de_put)
fs/proc/inode.c::44 if (!--de->count) {
de->count = 0

CPU B: (in remove_proc_entry)
fs/proc/generic.c::577         if (!de->count)
fs/proc/generic.c::578             free_proc_entry(de);

CPU A: (in de_put)
fs/proc/inode.c::45 if (de->deleted) { <-- dereferencing kfreed pointer

What does protect us from the preceding if lock_kernel is thrown ?

-- 
Ueimor
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
Please read the FAQ at http://www.tux.org/lkml/