BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 19667, name: syz-executor.5 3 locks held by syz-executor.5/19667: #0: 00000000fc4e8a07 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000fc4e8a07 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 000000002860f700 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000045eed71 (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 242 hardirqs last enabled at (241): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (241): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (242): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (242): [] _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: 19667 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: 0033:0x7fab444e3e99 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:00007fab42e59168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007fab445f6f60 RCX: 00007fab444e3e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007fab4453dff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0bd52f5f R14: 00007fab42e59300 R15: 0000000000022000 sd 0:0:1:0: [sg0] tag#3770 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#3770 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: [sg0] tag#3770 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: [sg0] tag#3770 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: [sg0] tag#3770 CDB[20]: ba audit: type=1804 audit(1640372040.717:6): pid=19685 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir576289443/syzkaller.OYvrYP/563/bus" dev="sda1" ino=14963 res=1 BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 19667, name: syz-executor.5 3 locks held by syz-executor.5/19667: #0: 00000000fc4e8a07 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000fc4e8a07 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 000000002860f700 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 0000000029b817e5 (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x199/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:628 irq event stamp: 464 hardirqs last enabled at (463): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (464): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (464): [] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:152 softirqs last enabled at (462): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (443): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (443): [] irq_exit+0x215/0x260 kernel/softirq.c:412 Preemption disabled at: [<0000000000000000>] (null) CPU: 1 PID: 19667 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+0x583/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:639 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: 0033:0x7fab444e3e99 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:00007fab42e59168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007fab445f6f60 RCX: 00007fab444e3e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007fab4453dff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0bd52f5f R14: 00007fab42e59300 R15: 0000000000022000 sd 0:0:1:0: [sg0] tag#3770 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#3770 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: [sg0] tag#3770 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: [sg0] tag#3770 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: [sg0] tag#3770 CDB[20]: ba audit: type=1804 audit(1640372042.097:7): pid=19737 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir576289443/syzkaller.OYvrYP/564/bus" dev="sda1" ino=14947 res=1 audit: type=1804 audit(1640372042.407:8): pid=19774 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir197920288/syzkaller.kxzzqq/600/bus" dev="sda1" ino=14972 res=1 audit: type=1800 audit(1640372042.407:9): pid=19774 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14972 res=0 kvm: vcpu 0: requested 128 ns lapic timer period limited to 200000 ns sd 0:0:1:0: [sg0] tag#3858 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#3858 CDB: opcode=0xe5 (vendor) sd 0:0:1:0: [sg0] tag#3858 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c sd 0:0:1:0: [sg0] tag#3858 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d sd 0:0:1:0: [sg0] tag#3858 CDB[20]: ba audit: type=1804 audit(1640372043.437:10): pid=19845 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir576289443/syzkaller.OYvrYP/565/bus" dev="sda1" ino=14084 res=1 audit: type=1804 audit(1640372043.537:11): pid=19843 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir197920288/syzkaller.kxzzqq/601/bus" dev="sda1" ino=13884 res=1 audit: type=1800 audit(1640372043.537:12): pid=19843 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=13884 res=0 kvm: vcpu 0: requested 128 ns lapic timer period limited to 200000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 200000 ns audit: type=1800 audit(1640372043.847:13): pid=19894 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13913 res=0 overlayfs: unrecognized mount option "lowN><×ì·"erdir=.:file0g²¥šD€ÁgÃÒ h±‰E2}RîÕw¦½ëA0×p½—}ÂÈfd *;=1ú\L@…IR.ÅRí§'…)þû³Ÿ³ý1YœL{èIÙ~…/$…Ø~˜Èb©=ë† vÓ“ÀÃÊM4¥|ÉÃ2F˸?ZŽXÔ"IŠâ|=‰‡ëíÏ" or missing value audit: type=1804 audit(1640372043.867:14): pid=19894 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir272741257/syzkaller.zti6aH/559/bus" dev="sda1" ino=13913 res=1 overlayfs: unrecognized mount option "lowN><×ì·"erdir=.:file0g²¥šD€ÁgÃÒ h±‰E2}RîÕw¦½ëA0×p½—}ÂÈfd *;=1ú\L@…IR.ÅRí§'…)þû³Ÿ³ý1YœL{èIÙ~…/$…Ø~˜Èb©=ë† vÓ“ÀÃÊM4¥|ÉÃ2F˸?ZŽXÔ"IŠâ|=‰‡ëíÏ" or missing value audit: type=1800 audit(1640372046.118:15): pid=19954 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=14976 res=0 overlayfs: unrecognized mount option "lowN><×ì·"erdir=.:file0g²¥šD€ÁgÃÒ h±‰E2}RîÕw¦½ëA0×p½—}ÂÈfd *;=1ú\L@…IR.ÅRí§'…)þû³Ÿ³ý1YœL{èIÙ~…/$…Ø~˜Èb©=ë† vÓ“ÀÃÊM4¥|ÉÃ2F˸?ZŽXÔ"IŠâ|=‰‡ëíÏ" or missing value kvm: emulating exchange as write audit: type=1804 audit(1640372046.138:16): pid=19948 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir272741257/syzkaller.zti6aH/560/bus" dev="sda1" ino=14976 res=1 audit: type=1804 audit(1640372046.138:17): pid=19941 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir197920288/syzkaller.kxzzqq/602/bus" dev="sda1" ino=14977 res=1 ptrace attach of ""[19993] was attempted by "/root/syz-executor.1 exec"[19996] audit: type=1800 audit(1640372046.138:18): pid=19941 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14977 res=0 audit: type=1800 audit(1640372046.958:19): pid=20030 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=14244 res=0 audit: type=1804 audit(1640372046.958:20): pid=20031 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir272741257/syzkaller.zti6aH/561/bus" dev="sda1" ino=14244 res=1 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): This looks like a DOS 1.x volume, but isn't a recognized floppy size (6 sectors) FAT-fs (loop5): Can't find a valid FAT filesystem IPVS: ftp: loaded support on port[0] = 21