BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 16787, name: syz-executor.0 IPVS: ftp: loaded support on port[0] = 21 3 locks held by syz-executor.0/16787: #0: 0000000057fee165 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 0000000057fee165 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 00000000f814a56a (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 000000002a1458c7 (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 48 hardirqs last enabled at (47): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (47): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (48): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (48): [] _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: 16787 Comm: syz-executor.0 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: 0033:0x7f34eafd1e99 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:00007f34e9926168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f34eb0e5030 RCX: 00007f34eafd1e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f34eb02bff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe8d2d1a4f R14: 00007f34e9926300 R15: 0000000000022000 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 16931, name: syz-executor.0 3 locks held by syz-executor.0/16931: #0: 00000000863e7f06 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000863e7f06 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 00000000f814a56a (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000ec0edb0c (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 28 hardirqs last enabled at (27): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (27): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (28): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (28): [] _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: 16931 Comm: syz-executor.0 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: 0033:0x7f34eafd1e99 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:00007f34e9926168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f34eb0e5030 RCX: 00007f34eafd1e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f34eb02bff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe8d2d1a4f R14: 00007f34e9926300 R15: 0000000000022000 audit: type=1804 audit(1640288312.954:66): pid=17008 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir286648075/syzkaller.ZzrU3H/19/bus" dev="sda1" ino=14716 res=1 audit: type=1804 audit(1640288313.074:67): pid=17024 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir286648075/syzkaller.ZzrU3H/19/bus" dev="sda1" ino=14716 res=1 print_req_error: I/O error, dev loop7, sector 128 Buffer I/O error on dev loop7, logical block 16, lost async page write print_req_error: I/O error, dev loop7, sector 136 Buffer I/O error on dev loop7, logical block 17, lost async page write print_req_error: I/O error, dev loop7, sector 144 Buffer I/O error on dev loop7, logical block 18, lost async page write print_req_error: I/O error, dev loop7, sector 152 Buffer I/O error on dev loop7, logical block 19, lost async page write print_req_error: I/O error, dev loop7, sector 160 Buffer I/O error on dev loop7, logical block 20, lost async page write print_req_error: I/O error, dev loop7, sector 168 Buffer I/O error on dev loop7, logical block 21, lost async page write print_req_error: I/O error, dev loop7, sector 176 Buffer I/O error on dev loop7, logical block 22, lost async page write print_req_error: I/O error, dev loop7, sector 184 Buffer I/O error on dev loop7, logical block 23, lost async page write print_req_error: I/O error, dev loop7, sector 192 Buffer I/O error on dev loop7, logical block 24, lost async page write print_req_error: I/O error, dev loop7, sector 0 Buffer I/O error on dev loop7, logical block 0, lost async page write overlayfs: failed to resolve './file1': -2 audit: type=1804 audit(1640288314.384:68): pid=17138 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir286648075/syzkaller.ZzrU3H/21/bus" dev="sda1" ino=14707 res=1 Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout audit: type=1804 audit(1640288314.494:69): pid=17145 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir286648075/syzkaller.ZzrU3H/21/bus" dev="sda1" ino=14707 res=1 Bluetooth: hci2: command 0x0406 tx timeout audit: type=1804 audit(1640288314.814:70): pid=17145 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir286648075/syzkaller.ZzrU3H/21/bus" dev="sda1" ino=14707 res=1 SQUASHFS error: squashfs_read_data failed to read block 0x0 squashfs: SQUASHFS error: unable to read squashfs_super_block overlayfs: failed to resolve './file0': -2 Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated SQUASHFS error: squashfs_read_data failed to read block 0x0 loop_reread_partitions: partition scan of loop1 () failed (rc=-5) squashfs: SQUASHFS error: unable to read squashfs_super_block Dev loop1: unable to read RDB block 1 SQUASHFS error: squashfs_read_data failed to read block 0x0 SQUASHFS error: squashfs_read_data failed to read block 0x0 loop1: unable to read partition table squashfs: SQUASHFS error: unable to read squashfs_super_block squashfs: SQUASHFS error: unable to read squashfs_super_block loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Dev loop1: unable to read RDB block 1 loop1: unable to read partition table SQUASHFS error: squashfs_read_data failed to read block 0x0 loop1: partition table beyond EOD, truncated squashfs: SQUASHFS error: unable to read squashfs_super_block SQUASHFS error: squashfs_read_data failed to read block 0x0 squashfs: SQUASHFS error: unable to read squashfs_super_block Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Dev loop1: unable to read RDB block 1 loop1: unable to read partition table SQUASHFS error: squashfs_read_data failed to read block 0x0 squashfs: SQUASHFS error: unable to read squashfs_super_block SQUASHFS error: squashfs_read_data failed to read block 0x0 loop1: partition table beyond EOD, truncated squashfs: SQUASHFS error: unable to read squashfs_super_block squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 SQUASHFS error: squashfs_read_data failed to read block 0x0 squashfs: SQUASHFS error: unable to read squashfs_super_block squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 bridge0: port 3(bond0) entered blocking state squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 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 device bond0 left promiscuous mode device bond_slave_0 left promiscuous mode device bond_slave_1 left promiscuous mode bridge0: port 3(bond0) entered disabled state squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5 bridge0: port 3(bond0) entered blocking state bridge0: port 3(bond0) entered disabled state squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 device bond0 entered promiscuous mode squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5 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 IPv6: sit1: Disabled Multicast RS squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5 device bond0 left promiscuous mode device bond_slave_0 left promiscuous mode squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 device bond_slave_1 left promiscuous mode bridge0: port 3(bond0) entered disabled state squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop2 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5 audit: type=1804 audit(1640288319.854:71): pid=17744 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir286648075/syzkaller.ZzrU3H/34/file1/bus" dev="sda1" ino=13941 res=1 IPv6: sit1: Disabled Multicast RS BTRFS: device fsid f90cac8b-044b-4fa8-8bee-4b8d3da88dc2 devid 0 transid 7 /dev/loop3 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5 squashfs: SQUASHFS error: unable to read xattr id index table squashfs: SQUASHFS error: unable to read xattr id index table squashfs: SQUASHFS error: unable to read xattr id index table