BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 27376, name: syz-executor.5 3 locks held by syz-executor.5/27376: #0: 0000000075645661 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 0000000075645661 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 0000000083eedb72 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 0000000018b7b4c4 (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 264 hardirqs last enabled at (263): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (263): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (264): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (264): [] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:152 softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1856 softirqs last disabled at (0): [<0000000000000000>] (null) Preemption disabled at: [<0000000000000000>] (null) CPU: 1 PID: 27376 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6192 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x26d/0x370 mm/slab.c:3557 ep_ptable_queue_proc+0xaf/0x390 fs/eventpoll.c:1242 poll_wait include/linux/poll.h:51 [inline] v4l2_m2m_poll+0x633/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:625 v4l2_m2m_fop_poll+0xa4/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1058 v4l2_poll+0x146/0x1f0 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:90 [inline] ep_item_poll+0x14a/0x3e0 fs/eventpoll.c:890 ep_insert fs/eventpoll.c:1479 [inline] __do_sys_epoll_ctl fs/eventpoll.c:2112 [inline] __se_sys_epoll_ctl+0x1b04/0x2b90 fs/eventpoll.c:1997 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8bfed47e99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8bfd6bd168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f8bfee5af60 RCX: 00007f8bfed47e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f8bfeda1ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6d842f2f R14: 00007f8bfd6bd300 R15: 0000000000022000 IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 netlink: 'syz-executor.3': attribute type 1 has an invalid length. ebtables: ebtables: counters copy to user failed while replacing table 8021q: adding VLAN 0 to HW filter on device bond1 bond0: Enslaving bond1 as an active interface with an up link netlink: 'syz-executor.3': attribute type 1 has an invalid length. BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 27458, name: syz-executor.5 3 locks held by syz-executor.5/27458: #0: 00000000da5d7428 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000da5d7428 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 0000000083eedb72 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000e9c7b5a3 (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 246 hardirqs last enabled at (245): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (245): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (246): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (246): [] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:152 softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1856 softirqs last disabled at (0): [<0000000000000000>] (null) Preemption disabled at: [<0000000000000000>] (null) CPU: 1 PID: 27458 Comm: syz-executor.5 Tainted: G W 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6192 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x26d/0x370 mm/slab.c:3557 ep_ptable_queue_proc+0xaf/0x390 fs/eventpoll.c:1242 poll_wait include/linux/poll.h:51 [inline] v4l2_m2m_poll+0x633/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:625 v4l2_m2m_fop_poll+0xa4/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1058 v4l2_poll+0x146/0x1f0 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:90 [inline] ep_item_poll+0x14a/0x3e0 fs/eventpoll.c:890 ep_insert fs/eventpoll.c:1479 [inline] __do_sys_epoll_ctl fs/eventpoll.c:2112 [inline] __se_sys_epoll_ctl+0x1b04/0x2b90 fs/eventpoll.c:1997 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8bfed47e99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 8021q: adding VLAN 0 to HW filter on device bond2 RSP: 002b:00007f8bfd6bd168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f8bfee5af60 RCX: 00007f8bfed47e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f8bfeda1ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6d842f2f R14: 00007f8bfd6bd300 R15: 0000000000022000 bond0: Enslaving bond2 as an active interface with an up link IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 ebtables: ebtables: counters copy to user failed while replacing table netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. bond2: The slave device specified does not support setting the MAC address nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 netlink: 'syz-executor.3': attribute type 1 has an invalid length. 8021q: adding VLAN 0 to HW filter on device bond3 ebtables: ebtables: counters copy to user failed while replacing table bond0: Enslaving bond3 as an active interface with an up link netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. bond3: The slave device specified does not support setting the MAC address IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 ebtables: ebtables: counters copy to user failed while replacing table IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 ebtables: ebtables: counters copy to user failed while replacing table IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 ebtables: ebtables: counters copy to user failed while replacing table netlink: 'syz-executor.4': attribute type 1 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 ebtables: ebtables: counters copy to user failed while replacing table ebtables: ebtables: counters copy to user failed while replacing table netlink: 'syz-executor.3': attribute type 1 has an invalid length. netlink: 'syz-executor.4': attribute type 1 has an invalid length. 8021q: adding VLAN 0 to HW filter on device bond4 bond0: Enslaving bond4 as an active interface with an up link 8021q: adding VLAN 0 to HW filter on device bond1 bond0: Enslaving bond1 as an active interface with an up link netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. bond4: The slave device specified does not support setting the MAC address netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. bond1: The slave device specified does not support setting the MAC address IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 netlink: 'syz-executor.4': attribute type 1 has an invalid length. ebtables: ebtables: counters copy to user failed while replacing table 8021q: adding VLAN 0 to HW filter on device bond2 bond0: Enslaving bond2 as an active interface with an up link ebtables: ebtables: counters copy to user failed while replacing table ebtables: ebtables: counters copy to user failed while replacing table netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. bond2: The slave device specified does not support setting the MAC address IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 ebtables: ebtables: counters copy to user failed while replacing table IPVS: set_ctl: invalid protocol: 1 172.20.20.170:20004 ebtables: ebtables: counters copy to user failed while replacing table bridge0: port 3(bond0) entered blocking state bridge0: port 3(bond0) entered disabled state device bond0 entered promiscuous mode device bond_slave_0 entered promiscuous mode device bond_slave_1 entered promiscuous mode bridge0: port 3(bond0) entered blocking state bridge0: port 3(bond0) entered forwarding state