[ 30.063267] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 30.071806] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 30.080515] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 30.087654] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 30.191723] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 30.262432] syz-executor.0 (7965) used greatest stack depth: 24376 bytes left [ 30.646768] can: request_module (can-proto-0) failed. [ 30.656751] can: request_module (can-proto-0) failed. [ 30.664744] can: request_module (can-proto-0) failed. [ 40.484117] unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 [ 50.520533] unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Warning: Permanently added '10.128.10.33' (ECDSA) to the list of known hosts. [ 51.283128] BUG: sleeping function called from invalid context at mm/slab.h:419 [ 51.290655] in_atomic(): 1, irqs_disabled(): 1, pid: 8295, name: syz-executor484 [ 51.298219] 3 locks held by syz-executor484/8295: [ 51.303030] #0: (&ep->mtx){+.+.}, at: [] SyS_epoll_ctl+0x4bc/0x27e0 [ 51.311188] #1: (&dev->dev_mutex){+.+.}, at: [] v4l2_m2m_fop_poll+0x8c/0x100 [ 51.320090] #2: (&(&q->done_lock)->rlock){....}, at: [] v4l2_m2m_poll+0x103/0x650 [ 51.329428] irq event stamp: 7634 [ 51.332854] hardirqs last enabled at (7633): [] _raw_spin_unlock_irqrestore+0x82/0xd0 [ 51.342442] hardirqs last disabled at (7634): [] _raw_spin_lock_irqsave+0x74/0xd0 [ 51.351609] softirqs last enabled at (6364): [] __do_softirq+0x644/0x9a2 [ 51.360100] softirqs last disabled at (6345): [] irq_exit+0x15f/0x1a0 [ 51.368226] Preemption disabled at: [ 51.368236] [] v4l2_m2m_poll+0x103/0x650 [ 51.377789] CPU: 1 PID: 8295 Comm: syz-executor484 Not tainted 4.14.275-syzkaller #0 [ 51.385646] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.394985] Call Trace: [ 51.397584] dump_stack+0x14b/0x1e7 [ 51.401189] ? v4l2_m2m_poll+0x103/0x650 [ 51.405225] ___might_sleep.cold.19+0x1f1/0x265 [ 51.409871] __might_sleep+0x93/0xb0 [ 51.413561] kmem_cache_alloc+0x2a1/0x3e0 [ 51.417681] ep_ptable_queue_proc+0xbd/0x3d0 [ 51.422066] v4l2_m2m_poll+0x4c5/0x650 [ 51.425928] v4l2_m2m_fop_poll+0x9a/0x100 [ 51.430048] ? v4l2_m2m_ctx_release+0x30/0x30 [ 51.434538] v4l2_poll+0x122/0x1f0 [ 51.438069] SyS_epoll_ctl+0x13c6/0x27e0 [ 51.442121] ? SyS_epoll_create+0x20/0x20 [ 51.446314] ? __fd_install+0x1f0/0x5b0 [ 51.450365] ? get_unused_fd_flags+0xd0/0xd0 [ 51.454764] ? anon_inodefs_mount+0x30/0x30 [ 51.459059] ? __lockdep_init_map+0x105/0x550 [ 51.463548] ? ep_send_events_proc+0x9c0/0x9c0 [ 51.468117] ? do_syscall_64+0x4c/0x5b0 [ 51.472077] ? SyS_epoll_create+0x20/0x20 [ 51.476642] do_syscall_64+0x1c7/0x5b0 [ 51.480506] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.485346] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 51.490547] RIP: 0033:0x7f08748b0d09 [ 51.494234] RSP: 002b:00007fff295fda28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 51.502091] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f08748b0d09 [ 51.509336] RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 [ 51.516595] RBP: 00007f0874874eb0 R08: 0000000000000000 R09: 0000000000000000 [ 51.523837] R10: 00000000200000c0 R11: 0000000000000246 R12: 00007f0874874f40 [ 51.531081] R13: 0000000000000000 R