netlink cap_dac* diff -upr a/grsecurity/gracl_cap.c c/grsecurity/gracl_cap.c --- a/grsecurity/gracl_cap.c 2007-12-01 00:54:57.312774500 +0000 +++ c/grsecurity/gracl_cap.c 2007-12-01 01:09:34.923621750 +0000 @@ -110,3 +110,19 @@ gr_is_capable_nolog(const int cap) return 0; } +void +gr_log_cap_pid(const int cap, const pid_t pid) +{ + struct task_struct *p; + + if (gr_acl_is_enabled()) { + read_lock(&tasklist_lock); + p = find_task_by_vpid(pid); + if (p) { + get_task_struct(p); + gr_log_cap(GR_DONT_AUDIT, GR_CAP_ACL_MSG, p, captab_log[cap]); + } + read_unlock(&tasklist_lock); + } + return; +} --- a/grsecurity/grsec_sock.c 2008-03-24 00:24:22.482633101 +0100 +++ c/grsecurity/grsec_sock.c 2008-03-24 00:27:01.971671763 +0100 @@ -247,23 +247,26 @@ gr_cap_rtnetlink(struct sock *sock) { #ifdef CONFIG_GRKERNSEC + struct acl_subject_label *curracl; + kernel_cap_t cap_dropp = __cap_empty_set, cap_mask = __cap_empty_set; + if (!gr_acl_is_enabled()) return current_cap(); - else if (sock->sk_protocol == NETLINK_ISCSI && - cap_raised(current_cap(), CAP_SYS_ADMIN) && - gr_is_capable(CAP_SYS_ADMIN)) - return current_cap(); - else if (sock->sk_protocol == NETLINK_AUDIT && - cap_raised(current_cap(), CAP_AUDIT_WRITE) && - gr_is_capable(CAP_AUDIT_WRITE) && - cap_raised(current_cap(), CAP_AUDIT_CONTROL) && - gr_is_capable(CAP_AUDIT_CONTROL)) - return current_cap(); - else if (cap_raised(current_cap(), CAP_NET_ADMIN) && - gr_is_capable(CAP_NET_ADMIN)) - return current_cap(); - else - return __cap_empty_set; + else { + curracl = current->acl; + + cap_dropp = curracl->cap_lower; + cap_mask = curracl->cap_mask; + + while ((curracl = curracl->parent_subject)) { + cap_dropp = cap_combine(cap_dropp, + cap_intersect(curracl->cap_lower, + cap_drop(cap_mask, curracl->cap_mask))); + cap_mask = cap_combine(cap_mask, curracl->cap_mask); + } + return cap_drop(current_cap(), + cap_intersect(cap_dropp, cap_mask)); + } #else return current_cap(); #endif diff -upr a/include/linux/grsecurity.h c/include/linux/grsecurity.h --- a/include/linux/grsecurity.h 2007-12-01 00:54:57.224769000 +0000 +++ c/include/linux/grsecurity.h 2007-12-01 01:09:34.923621750 +0000 @@ -76,6 +76,7 @@ void gr_log_semrm(const uid_t uid, const void gr_log_shmget(const int err, const int shmflg, const size_t size); void gr_log_shmrm(const uid_t uid, const uid_t cuid); void gr_log_textrel(struct vm_area_struct *vma); +void gr_log_cap_pid(const int cap, pid_t pid); int gr_handle_follow_link(const struct inode *parent, const struct inode *inode, diff -upr a/security/commoncap.c c/security/commoncap.c --- a/security/commoncap.c 2007-12-01 00:54:57.300773750 +0000 +++ c/security/commoncap.c 2007-12-01 01:09:34.923621750 +0000 @@ -55,8 +55,12 @@ int cap_netlink_recv(struct sk_buff *skb, int cap) { - if (!cap_raised(NETLINK_CB(skb).eff_cap, cap)) + if (!cap_raised(NETLINK_CB(skb).eff_cap, cap)) { +#ifdef CONFIG_GRKERNSEC + gr_log_cap_pid(cap, NETLINK_CREDS(skb)->pid); +#endif return -EPERM; + } return 0; } === === cap_dac_ succession with capable_nolog === diff -upr a/fs./namei.c a/fs/namei.c --- a/fs./namei.c 2008-04-05 01:23:49.741310000 +0200 +++ a/fs/namei.c 2008-04-05 14:36:39.350275977 +0200 @@ -215,6 +215,13 @@ int generic_permission(struct inode *ino check_capabilities: /* + * Searching includes executable on directories, else just read. + */ + if (mask == MAY_READ || (S_ISDIR(inode->i_mode) && !(mask & MAY_WRITE))) + if (capable_nolog(CAP_DAC_OVERRIDE) || capable(CAP_DAC_READ_SEARCH)) + return 0; + + /* * Read/write DACs are always overridable. * Executable DACs are overridable if at least one exec bit is set. */ @@ -223,13 +230,6 @@ int generic_permission(struct inode *ino if (capable(CAP_DAC_OVERRIDE)) return 0; - /* - * Searching includes executable on directories, else just read. - */ - if (mask == MAY_READ || (S_ISDIR(inode->i_mode) && !(mask & MAY_WRITE))) - if (capable(CAP_DAC_READ_SEARCH)) - return 0; - return -EACCES; } @@ -498,13 +498,13 @@ static int exec_permission_lite(struct i if (mode & MAY_EXEC) goto ok; - if ((inode->i_mode & S_IXUGO) && capable(CAP_DAC_OVERRIDE)) + if (S_ISDIR(inode->i_mode) && capable_nolog(CAP_DAC_OVERRIDE)) goto ok; - if (S_ISDIR(inode->i_mode) && capable(CAP_DAC_OVERRIDE)) + if (S_ISDIR(inode->i_mode) && capable(CAP_DAC_READ_SEARCH)) goto ok; - if (S_ISDIR(inode->i_mode) && capable(CAP_DAC_READ_SEARCH)) + if ((inode->i_mode & S_IXUGO) && capable(CAP_DAC_OVERRIDE)) goto ok; return -EACCES; --- linux-2.6.30/kernel/vserver/context.c~ 2009-07-31 12:07:52.365267958 +0200 +++ linux-2.6.30/kernel/vserver/context.c 2009-07-31 12:43:04.991723596 +0200 @@ -122,7 +122,7 @@ // preconfig fs entries for (index = 0; index < VX_SPACES; index++) { write_lock(&init_fs.lock); - init_fs.users++; + atomic_inc(&init_fs.users); write_unlock(&init_fs.lock); new->vx_fs[index] = &init_fs; } @@ -196,7 +196,7 @@ fs = xchg(&vxi->vx_fs[index], NULL); write_lock(&fs->lock); - kill = !--fs->users; + kill = !atomic_dec_return(&fs->users); write_unlock(&fs->lock); if (kill) free_fs_struct(fs); --- linux-2.6.30/kernel/vserver/space.c~ 2009-07-31 12:07:52.398601243 +0200 +++ linux-2.6.30/kernel/vserver/space.c 2009-07-31 12:47:48.638394441 +0200 @@ -220,7 +220,7 @@ if (mask & CLONE_FS) { write_lock(&fs_cur->lock); current->fs = fs; - kill = !--fs_cur->users; + kill = !atomic_dec_return(&fs_cur->users); write_unlock(&fs_cur->lock); } @@ -278,7 +278,7 @@ if (mask & CLONE_FS) { write_lock(&fs_vxi->lock); vxi->vx_fs[index] = fs; - kill = !--fs_vxi->users; + kill = !atomic_dec_return(&fs_vxi->users); write_unlock(&fs_vxi->lock); }