Hello,
After mounting securityfs like this:
uml# mount securityfs -t securityfs /sys/kernel/security
I load a module which performs these operations:
static void securityfs_init(void)
{
struct dentry *de;
printk(KERN_ALERT "securityfs_init\n");
de = securityfs_create_dir("berlinfw2", NULL);
if(!de) {
printk(KERN_ALERT "Can't create security directory\n");
}
}
Then I've got a deadlock, interruption uml, and showing the stackstrace
gives that:
#0 hard_handler (sig=11) at arch/um/os-Linux/sys-i386/signal.c:11
#1 <signal handler called>
#2 0x081b76da in mutex_lock (lock=0x40162068) at
include/asm/arch/atomic.h:189
#3 0x0812dfbb in create_by_name (name=0xa81b09c "<1>securityfs_init\n",
mode=16877, parent=0x95a3f1c,
dentry=0x95a3ec8) at security/inode.c:173
#4 0x0812e0e0 in securityfs_create_file (name=0xa81b09c
"<1>securityfs_init\n", mode=16877, parent=0x95a3f1c,
data=0x0, fops=0x0) at security/inode.c:231
#5 0x0812e160 in securityfs_create_dir (name=0xa81b09c
"<1>securityfs_init\n", parent=0x95a3f1c)
at security/inode.c:272
#6 0x0a81b04a in ?? ()
#7 0x0a81b09c in ?? ()
#8 0x095a3f1c in ?? ()
#9 0x0809de76 in sys_init_module (umod=0x821aab4, len=1, uargs=0xa81b440
"\001") at kernel/module.c:1991
The module works fine on the host. The host kernel is
2.6.20-16-generic(ubuntu feisty fawn), the uml kernel is compiled from
ubuntu sources.
It seems there is a memory problem in the frame #5, the argument of the call
is wrong!
Any ideas ?
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