| commit | 7695650a924a6859910c8c19dfa43b4d08224d66 | |
| author | Alexey Dobriyan <adobriyan@openvz.org> | |
| Tue, 8 May 2007 07:25:45 +0000 (8 00:25 -0700) | ||
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | |
| Tue, 8 May 2007 18:15:01 +0000 (8 11:15 -0700) | ||
| tree | 5947c3e1b24600b6440468c11b30feeef31eee2c | treesnapshot (tar.gz zip) |
| parent | 79c0b2df79eb56fc71e54c75cd7fb3acf84370f9 | commitdiff |
Fix race between proc_get_inode() and remove_proc_entry()
proc_lookup remove_proc_entry
=========== =================
lock_kernel();
spin_lock(&proc_subdir_lock);
[find PDE with refcount 0]
spin_unlock(&proc_subdir_lock);
spin_lock(&proc_subdir_lock);
[find PDE with refcount 0]
[check refcount and free PDE]
spin_unlock(&proc_subdir_lock);
proc_get_inode:
de_get(de); /* boom */
Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
proc_lookup remove_proc_entry
=========== =================
lock_kernel();
spin_lock(&proc_subdir_lock);
[find PDE with refcount 0]
spin_unlock(&proc_subdir_lock);
spin_lock(&proc_subdir_lock);
[find PDE with refcount 0]
[check refcount and free PDE]
spin_unlock(&proc_subdir_lock);
proc_get_inode:
de_get(de); /* boom */
Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| fs/proc/generic.c | diffblobblamehistory | |
| fs/proc/inode.c | diffblobblamehistory | |
| include/linux/proc_fs.h | diffblobblamehistory |