BUG: sleeping function called from invalid context at mm/slab.h:419
in_atomic(): 1, irqs_disabled(): 1, pid: 11459, name: syz-executor.2
3 locks held by syz-executor.2/11459:
#0: (&ep->mtx){+.+.}, at: [<ffffffff8196a276>] SYSC_epoll_ctl fs/eventpoll.c:2080 [inline]
#0: (&ep->mtx){+.+.}, at: [<ffffffff8196a276>] SyS_epoll_ctl+0x516/0x2780 fs/eventpoll.c:2002
#1: (&dev->dev_mutex){+.+.}, at: [<ffffffff84c03bd1>] v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:802
#2: (&(&q->done_lock)->rlock){....}, at: [<ffffffff84c02f86>] v4l2_m2m_poll+0x116/0x670 drivers/media/v4l2-core/v4l2-mem2mem.c:536
irq event stamp: 236
hardirqs last enabled at (235): [<ffffffff8723fb99>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last enabled at (235): [<ffffffff8723fb99>] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:192
hardirqs last disabled at (236): [<ffffffff8723f826>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (236): [<ffffffff8723f826>] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:160
softirqs last enabled at (0): [<ffffffff81304b90>] copy_process.part.0+0x12d0/0x71c0 kernel/fork.c:1734
softirqs last disabled at (0): [< (null)>] (null)
Preemption disabled at:
[< (null)>] (null)
CPU: 1 PID: 11459 Comm: syz-executor.2 Not tainted 4.14.260-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: 0033:0x7fb19c905e99
RSP: 002b:00007fb19b27b168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9
RAX: ffffffffffffffda RBX: 00007fb19ca18f60 RCX: 00007fb19c905e99
RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 00007fb19c95fff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea9bdcfaf R14: 00007fb19b27b300 R15: 0000000000022000
block nbd5: Attempted send on invalid socket
print_req_error: I/O error, dev nbd5, sector 0
XFS (nbd5): SB validate failed with error -5.
block nbd5: shutting down sockets
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
block nbd0: shutting down sockets
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
block nbd5: shutting down sockets
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
block nbd5: shutting down sockets
EXT4-fs (loop4): mounted filesystem without journal. Opts: max_dir_size_kb=0x0000000000000000,,errors=continue
block nbd0: shutting down sockets
block nbd5: shutting down sockets
block nbd0: shutting down sockets
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
capability: warning: `syz-executor.3' uses deprecated v2 capabilities in a way that may be insecure
EXT4-fs (loop4): mounted filesystem without journal. Opts: max_dir_size_kb=0x0000000000000000,,errors=continue
overlayfs: failed to resolve './file1': -2
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
EXT4-fs (loop4): mounted filesystem without journal. Opts: max_dir_size_kb=0x0000000000000000,,errors=continue
EXT4-fs (loop4): mounted filesystem without journal. Opts: max_dir_size_kb=0x0000000000000000,,errors=continue
ip6_tables: ip6tables: counters copy to user failed while replacing table
Cannot find add_set index 0 as target
Cannot find add_set index 0 as target
Cannot find add_set index 0 as target
Cannot find add_set index 0 as target
BTRFS: device fsid f90cac8b-044b-4fa8-8bee-4b8d3da88dc2 devid 1 transid 7 /dev/loop3
BTRFS info (device loop3): disk space caching is enabled
BTRFS info (device loop3): has skinny extents
syz-executor.2 uses obsolete (PF_INET,SOCK_PACKET)
BTRFS error (device loop3): bad tree block start 0 1052672
BTRFS error (device loop3): failed to read chunk root
device syzkaller1 entered promiscuous mode
BTRFS error (device loop3): open_ctree failed
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
BTRFS: device label :��+���q�z�����X�Q��0� devid 1099511627779 transid 7 /dev/loop5
BTRFS error (device loop5): superblock checksum mismatch
BTRFS error (device loop5): open_ctree failed
audit: type=1804 audit(1640796026.037:20): pid=12230 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir442678709/syzkaller.QuTZN0/101/bus" dev="sda1" ino=14287 res=1