syz-executor.2 (12672) used greatest stack depth: 23344 bytes left BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 12720, name: syz-executor.3 3 locks held by syz-executor.3/12720: #0: 00000000fd3889e5 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000fd3889e5 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 00000000a7374771 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000e17f1747 (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 244 hardirqs last enabled at (243): [<ffffffff881950e9>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (243): [<ffffffff881950e9>] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (244): [<ffffffff88194d76>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (244): [<ffffffff88194d76>] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:152 softirqs last enabled at (0): [<ffffffff81370d39>] 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: 12720 Comm: syz-executor.3 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: 0033:0x7f8c5cd91e99 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:00007f8c5b707168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f8c5cea4f60 RCX: 00007f8c5cd91e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 00007f8c5cdebff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff97772e7f R14: 00007f8c5b707300 R15: 0000000000022000 F2FS-fs (loop4): Invalid Fs Meta Ino: node(0) meta(0) root(0) F2FS-fs (loop4): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop4): Unrecognized mount option "aRloc_mode=�" or missing value F2FS-fs (loop4): Invalid Fs Meta Ino: node(0) meta(0) root(0) F2FS-fs (loop4): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop4): Unrecognized mount option "aRloc_mode=�" or missing value F2FS-fs (loop4): Invalid Fs Meta Ino: node(0) meta(0) root(0) F2FS-fs (loop4): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop4): Unrecognized mount option "aRloc_mode=�" or missing value F2FS-fs (loop4): Invalid Fs Meta Ino: node(0) meta(0) root(0) team0: Device vlan0 is already an upper device of the team interface team0: Device vlan0 is already an upper device of the team interface netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. x86/PAT: syz-executor.2:12954 map pfn RAM range req write-combining for [mem 0x38e00000-0x38e01fff], got write-back netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. team0: Device vlan0 is already an upper device of the team interface x86/PAT: syz-executor.2:13006 map pfn RAM range req write-combining for [mem 0x37c00000-0x37c01fff], got write-back TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. x86/PAT: syz-executor.1:13045 map pfn RAM range req write-combining for [mem 0x37800000-0x37801fff], got write-back kauditd_printk_skb: 1 callbacks suppressed audit: type=1804 audit(1639902229.708:25): pid=13106 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir386990462/syzkaller.2Xvz1v/169/bus" dev="sda1" ino=14317 res=1 audit: type=1800 audit(1639902229.738:26): pid=13106 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=14317 res=0 EXT4-fs (loop0): fragment/cluster size (16384) != block size (1024) EXT4-fs (loop0): fragment/cluster size (16384) != block size (1024) EXT4-fs (loop0): fragment/cluster size (16384) != block size (1024) EXT4-fs (loop0): fragment/cluster size (16384) != block size (1024) audit: type=1804 audit(1639902232.279:27): pid=13401 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir083495899/syzkaller.cH5dMq/185/bus" dev="sda1" ino=14427 res=1 audit: type=1804 audit(1639902232.849:28): pid=13429 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir083495899/syzkaller.cH5dMq/186/bus" dev="sda1" ino=14415 res=1 f2fs_msg: 44 callbacks suppressed F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock audit: type=1804 audit(1639902233.049:29): pid=13480 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir083495899/syzkaller.cH5dMq/187/bus" dev="sda1" ino=14404 res=1 F2FS-fs (loop2): invalid crc value F2FS-fs (loop2): invalid crc value F2FS-fs (loop2): Failed to get valid F2FS checkpoint can: request_module (can-proto-4) failed. F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop2): invalid crc value netlink: 32 bytes leftover after parsing attributes in process `syz-executor.5'. F2FS-fs (loop2): invalid crc value F2FS-fs (loop2): Failed to get valid F2FS checkpoint netlink: 32 bytes leftover after parsing attributes in process `syz-executor.5'. can: request_module (can-proto-4) failed. jfs: Unrecognized mount option "���" or missing value EXT4-fs (sda1): re-mounted. Opts: (null) EXT4-fs (sda1): re-mounted. Opts: (null) can: request_module (can-proto-4) failed. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 32 bytes leftover after parsing attributes in process `syz-executor.5'. EXT4-fs (sda1): re-mounted. Opts: (null) jfs: Unrecognized mount option "���" or missing value EXT4-fs (sda1): re-mounted. Opts: (null) jfs: Unrecognized mount option "���" or missing value EXT4-fs (sda1): re-mounted. Opts: (null) EXT4-fs (sda1): re-mounted. Opts: (null) EXT4-fs (sda1): re-mounted. Opts: (null) audit: type=1800 audit(1639902235.169:30): pid=13832 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="sda1" ino=14460 res=0 audit: type=1804 audit(1639902235.219:31): pid=13848 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir386990462/syzkaller.2Xvz1v/176/bus" dev="sda1" ino=14461 res=1 audit: type=1800 audit(1639902235.219:32): pid=13848 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=14461 res=0 audit: type=1804 audit(1639902235.289:33): pid=13832 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir631694655/syzkaller.ulme1E/171/file0" dev="sda1" ino=14460 res=1 netlink: 60 bytes leftover after parsing attributes in process `syz-executor.1'. audit: type=1800 audit(1639902235.769:34): pid=13919 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="sda1" ino=14465 res=0 audit: type=1804 audit(1639902235.789:35): pid=13920 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir631694655/syzkaller.ulme1E/172/file0" dev="sda1" ino=14465 res=1 netlink: 60 bytes leftover after parsing attributes in process `syz-executor.1'.