On Tue, Jun 20, 2017 at 8:14 AM, Andrey Konovalov <andreyk...@google.com> wrote: > Hi, > > I've got the following error report while fuzzing the kernel with syzkaller. > > On commit 9705596d08ac87c18aee32cc97f2783b7d14624e (4.12-rc6+). > > A reproducer and .config are attached. > > INFO: trying to register non-static key. > the code is fine but needs lockdep annotation. > turning off the locking correctness validator. > CPU: 1 PID: 4099 Comm: a.out Not tainted 4.12.0-rc6+ #9 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:16 > dump_stack+0x292/0x395 lib/dump_stack.c:52 > register_lock_class+0x717/0x1aa0 kernel/locking/lockdep.c:755 > ? 0xffffffffa0000000 > __lock_acquire+0x269/0x3690 kernel/locking/lockdep.c:3255 > lock_acquire+0x22d/0x560 kernel/locking/lockdep.c:3855 > __raw_spin_lock_bh ./include/linux/spinlock_api_smp.h:135 > _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:175 > spin_lock_bh ./include/linux/spinlock.h:304 > ip_mc_clear_src+0x27/0x1e0 net/ipv4/igmp.c:2076
Although triggered by my commit, but it is not fault of missing spin_lock_init()... :-D I will send a fix. Thanks! > igmpv3_clear_delrec+0xee/0x4f0 net/ipv4/igmp.c:1194 > ip_mc_destroy_dev+0x4e/0x190 net/ipv4/igmp.c:1736 > inetdev_destroy net/ipv4/devinet.c:294 > inetdev_event+0x5f5/0x1260 net/ipv4/devinet.c:1487 > notifier_call_chain+0x14a/0x2e0 kernel/notifier.c:93 > __raw_notifier_call_chain kernel/notifier.c:394 > raw_notifier_call_chain+0x32/0x40 kernel/notifier.c:401 > call_netdevice_notifiers_info+0x56/0x90 net/core/dev.c:1650 > call_netdevice_notifiers net/core/dev.c:1666 > dev_set_mtu+0x3be/0x5e0 net/core/dev.c:6733 > dev_ifsioc+0x798/0x9f0 net/core/dev_ioctl.c:261 > dev_ioctl+0x24e/0x1160 net/core/dev_ioctl.c:532 > sock_do_ioctl+0x99/0xb0 net/socket.c:913 > sock_ioctl+0x294/0x440 net/socket.c:1004 > vfs_ioctl fs/ioctl.c:45 > do_vfs_ioctl+0x1c4/0x1660 fs/ioctl.c:685 > SYSC_ioctl fs/ioctl.c:700 > SyS_ioctl+0x94/0xc0 fs/ioctl.c:691 > entry_SYSCALL_64_fastpath+0x1f/0xbe arch/x86/entry/entry_64.S:203 > RIP: 0033:0x7efe2c1a4b79 > RSP: 002b:00007ffe2305a218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007ffe2305a320 RCX: 00007efe2c1a4b79 > RDX: 0000000020dc4000 RSI: 0000000000008922 RDI: 0000000000000005 > RBP: 00000000004004e0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007ffe2305a320 R14: 0000000000000000 R15: 0000000000000000 > qemu: terminating on signal 15 from pid 174244
