IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 audit: type=1400 audit(1546626149.778:38): avc: denied { associate } for pid=8625 comm="syz-executor0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 ===================================== WARNING: bad unlock balance detected! 4.20.0+ #9 Not tainted ------------------------------------- syz-executor0/10396 is trying to release lock (&file->mut) at: [] ucma_destroy_id+0x269/0x540 drivers/infiniband/core/ucma.c:628 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor0/10396: #0: 000000008fb5d1c5 (&file->mut){+.+.}, at: ucma_destroy_id+0x209/0x540 drivers/infiniband/core/ucma.c:626 stack backtrace: CPU: 0 PID: 10396 Comm: syz-executor0 Not tainted 4.20.0+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 print_unlock_imbalance_bug kernel/locking/lockdep.c:3391 [inline] print_unlock_imbalance_bug.cold+0xd0/0xdf kernel/locking/lockdep.c:3368 __lock_release kernel/locking/lockdep.c:3601 [inline] lock_release+0x77a/0xc40 kernel/locking/lockdep.c:3860 __mutex_unlock_slowpath+0xe9/0x870 kernel/locking/mutex.c:1197 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:713 ucma_destroy_id+0x269/0x540 drivers/infiniband/core/ucma.c:628 ucma_write+0x36b/0x480 drivers/infiniband/core/ucma.c:1689 __vfs_write+0x116/0xb40 fs/read_write.c:485 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0x105/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe028b73c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000018 RSI: 00000000200002c0 RDI: 0000000000000005 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe028b746d4 R13: 00000000004cd3c8 R14: 00000000004dc1c0 R15: 00000000ffffffff