BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 22999, name: syz-executor.4 3 locks held by syz-executor.4/22999: #0: 000000007752e41e (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 000000007752e41e (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 000000005003c7da (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000c3c26281 (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 250 hardirqs last enabled at (249): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (249): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (250): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (250): [] _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: 0 PID: 22999 Comm: syz-executor.4 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: 0033:0x7f3b225a0e99 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:00007f3b20f16168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f3b226b3f60 RCX: 00007f3b225a0e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f3b225faff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd53480edf R14: 00007f3b20f16300 R15: 0000000000022000 xt_cluster: node mask cannot exceed total number of nodes xt_cluster: node mask cannot exceed total number of nodes audit: type=1326 audit(1639528309.579:117): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f5ed9d53e99 code=0x7ffc0000 audit: type=1326 audit(1639528309.579:118): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f5ed9d53e99 code=0x7ffc0000 audit: type=1326 audit(1639528309.589:119): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=41 compat=0 ip=0x7f5ed9d53e99 code=0x7ffc0000 audit: type=1326 audit(1639528309.589:120): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f5ed9d53e99 code=0x7ffc0000 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 audit: type=1326 audit(1639528309.589:121): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f5ed9d53e99 code=0x7ffc0000 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 audit: type=1326 audit(1639528309.589:122): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=41 compat=0 ip=0x7f5ed9d55517 code=0x7ffc0000 BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 23053, name: syz-executor.3 3 locks held by syz-executor.3/23053: #0: 00000000d6ddd0a5 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000d6ddd0a5 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 000000005003c7da (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000049db46a (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 226 hardirqs last enabled at (225): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (225): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (226): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (226): [] _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: 0 PID: 23053 Comm: syz-executor.3 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 audit: type=1326 audit(1639528309.589:123): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=44 compat=0 ip=0x7f5ed9d06c5c code=0x7ffc0000 vfs_poll include/linux/poll.h:90 [inline] ep_item_poll+0x14a/0x3e0 fs/eventpoll.c:890 audit: type=1326 audit(1639528309.589:124): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=45 compat=0 ip=0x7f5ed9d06b94 code=0x7ffc0000 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 audit: type=1326 audit(1639528309.589:125): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=45 compat=0 ip=0x7f5ed9d06b94 code=0x7ffc0000 audit: type=1326 audit(1639528309.599:126): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=23011 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=3 compat=0 ip=0x7f5ed9d06adb code=0x7ffc0000 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fda4fc75e99 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:00007fda4e5eb168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007fda4fd88f60 RCX: 00007fda4fc75e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007fda4fccfff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0d4c734f R14: 00007fda4e5eb300 R15: 0000000000022000 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 kvm [23193]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x3ad6e37883b8e6ec kvm [23193]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xeeba025f48468bfa kvm [23232]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x3ad6e37883b8e6ec kvm [23231]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x3ad6e37883b8e6ec kvm [23231]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xeeba025f48468bfa kvm [23232]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xeeba025f48468bfa kvm: emulating exchange as write kvm [23267]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x3ad6e37883b8e6ec kvm [23266]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x3ad6e37883b8e6ec kvm [23266]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xeeba025f48468bfa kvm [23267]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xeeba025f48468bfa kvm [23300]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x3ad6e37883b8e6ec kvm [23298]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x3ad6e37883b8e6ec kvm [23300]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xeeba025f48468bfa kvm [23298]: vcpu0, guest rIP: 0xfff0 unimplemented MMIO_CONF_BASE wrmsr: 0xeeba025f48468bfa