audit: type=1804 audit(1641404091.980:51): pid=11641 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir384215819/syzkaller.Lclz1b/85/bus" dev="sda1" ino=14233 res=1 BUG: sleeping function called from invalid context at mm/slab.h:419 in_atomic(): 1, irqs_disabled(): 1, pid: 11648, name: syz-executor.5 3 locks held by syz-executor.5/11648: #0: (&ep->mtx){+.+.}, at: [] SYSC_epoll_ctl fs/eventpoll.c:2080 [inline] #0: (&ep->mtx){+.+.}, at: [] SyS_epoll_ctl+0x516/0x2780 fs/eventpoll.c:2002 #1: (&dev->dev_mutex){+.+.}, at: [] v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:802 #2: (&(&q->done_lock)->rlock){....}, at: [] v4l2_m2m_poll+0x116/0x670 drivers/media/v4l2-core/v4l2-mem2mem.c:536 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:192 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:160 softirqs last enabled at (0): [] copy_process.part.0+0x12d0/0x71c0 kernel/fork.c:1734 softirqs last disabled at (0): [< (null)>] (null) Preemption disabled at: [< (null)>] (null) CPU: 0 PID: 11648 Comm: syz-executor.5 Not tainted 4.14.261-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6041 slab_pre_alloc_hook mm/slab.h:419 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc+0x284/0x3c0 mm/slab.c:3550 ep_ptable_queue_proc+0x9e/0x370 fs/eventpoll.c:1255 poll_wait include/linux/poll.h:50 [inline] v4l2_m2m_poll+0x583/0x670 drivers/media/v4l2-core/v4l2-mem2mem.c:538 v4l2_m2m_fop_poll+0xa4/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:804 v4l2_poll+0x133/0x1d0 drivers/media/v4l2-core/v4l2-dev.c:342 ep_item_poll fs/eventpoll.c:885 [inline] ep_insert fs/eventpoll.c:1490 [inline] SYSC_epoll_ctl fs/eventpoll.c:2117 [inline] SyS_epoll_ctl+0x14af/0x2780 fs/eventpoll.c:2002 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f8585f91e99 RSP: 002b:00007f8584907168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f85860a4f60 RCX: 00007f8585f91e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f8585febff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdd012f82f R14: 00007f8584907300 R15: 0000000000022000 audit: type=1804 audit(1641404092.030:52): pid=11641 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir384215819/syzkaller.Lclz1b/85/bus" dev="sda1" ino=14233 res=1 audit: type=1804 audit(1641404092.680:53): pid=11660 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir384215819/syzkaller.Lclz1b/86/bus" dev="sda1" ino=14221 res=1 audit: type=1804 audit(1641404092.690:54): pid=11660 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir384215819/syzkaller.Lclz1b/86/bus" dev="sda1" ino=14221 res=1 audit: type=1804 audit(1641404093.130:55): pid=11688 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir384215819/syzkaller.Lclz1b/87/bus" dev="sda1" ino=14212 res=1 audit: type=1804 audit(1641404093.130:56): pid=11688 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir384215819/syzkaller.Lclz1b/87/bus" dev="sda1" ino=14212 res=1 audit: type=1804 audit(1641404093.400:57): pid=11713 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir384215819/syzkaller.Lclz1b/88/bus" dev="sda1" ino=14230 res=1 audit: type=1804 audit(1641404093.430:58): pid=11713 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir384215819/syzkaller.Lclz1b/88/bus" dev="sda1" ino=14230 res=1 block nbd4: shutting down sockets audit: type=1800 audit(1641404094.720:59): pid=11779 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="loop5" ino=161 res=0 block nbd4: shutting down sockets FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) block nbd4: shutting down sockets block nbd0: shutting down sockets FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) block nbd4: shutting down sockets block nbd0: shutting down sockets FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) block nbd0: shutting down sockets FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) IPVS: ftp: loaded support on port[0] = 21 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) hid-generic 0000:0000:0000.0001: unknown main item tag 0x0 hid-generic 0000:0000:0000.0001: unknown main item tag 0x0