INFO: trying to register non-static key in free_ipcs

[syzbot]

Hello,

syzkaller hit the following crash on
6084b576dca2e898f5c101baef151f7bfdbb606d
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.

Unfortunately, I don't have any reproducer for this bug yet.


9pnet_virtio: no channels available for device ./file0
Buffer I/O error on dev loop0, logical block 0, async page read
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 21631 Comm: syz-executor2 Not tainted 4.15.0-rc3-next-20171214+
#67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0xe9/0x14b lib/dump_stack.c:53
register_lock_class+0x164/0x5d0 kernel/locking/lockdep.c:752
__lock_acquire+0xb4/0x1430 kernel/locking/lockdep.c:3314
lock_acquire+0xbf/0x220 kernel/locking/lockdep.c:3914
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
spin_lock include/linux/spinlock.h:310 [inline]
ipc_lock_object ipc/util.h:171 [inline]
free_ipcs+0xc5/0x140 ipc/namespace.c:123
sem_exit_ns+0x20/0x40 ipc/sem.c:200
free_ipc_ns ipc/namespace.c:132 [inline]
put_ipc_ns+0x55/0xd0 ipc/namespace.c:164
free_nsproxy+0x63/0x100 kernel/nsproxy.c:180
switch_task_namespaces+0x80/0x90 kernel/nsproxy.c:229
exit_task_namespaces+0x17/0x20 kernel/nsproxy.c:234
do_exit+0x3e1/0x1050 kernel/exit.c:868
do_group_exit+0x60/0x100 kernel/exit.c:972
get_signal+0x36c/0xad0 kernel/signal.c:2337
do_signal+0x23/0x670 arch/x86/kernel/signal.c:809
exit_to_usermode_loop+0x13c/0x160 arch/x86/entry/common.c:161
prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
syscall_return_slowpath+0x1b4/0x1e0 arch/x86/entry/common.c:264
entry_SYSCALL_64_fastpath+0x94/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f0c9c350c58 EFLAGS: 00000212 ORIG_RAX: 000000000000011d
RAX: fffffffffffffffb RBX: 00000000007580d8 RCX: 0000000000452a39
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 000000000000001c
RBP: 000000000000006c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000044400004 R11: 0000000000000212 R12: 00000000006eeac0
R13: 00000000ffffffff R14: 00007f0c9c3516d4 R15: 000000000000000c
audit: type=1400 audit(1513383346.376:11455): avc: denied { sys_ptrace }
for pid=21695 comm="ps" capability=19
scontext=system_u:system_r:kernel_t:s0
tcontext=system_u:system_r:kernel_t:s0 tclass=cap_userns permissive=1
QAT: Invalid ioctl
QAT: Invalid ioctl
QAT: Invalid ioctl
QAT: Invalid ioctl


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[Dmitry Vyukov]

old bug bankruptcy

#syz invalid

On Tue, Dec 19, 2017 at 11:52 AM, syzbot
<bot+020b386f35de269c77...@syzkaller.appspotmail.com>
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