======================================================
WARNING: possible circular locking dependency detected
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
4.19.85-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.5/12075 is trying to acquire lock:
0000000050f736f8 (&mm->mmap_sem){++++}, at: __might_fault+0xfb/0x1e0 mm/memory.c:4637
but task is already holding lock:
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
000000005cd47723 (&rp->fetch_lock){+.+.}, at: mon_bin_read+0x60/0x640 drivers/usb/mon/mon_bin.c:813
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&rp->fetch_lock){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:925 [inline]
__mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
mon_bin_vma_fault+0x73/0x2d0 drivers/usb/mon/mon_bin.c:1237
__do_fault+0x111/0x480 mm/memory.c:3269
do_read_fault mm/memory.c:3681 [inline]
do_fault mm/memory.c:3810 [inline]
handle_pte_fault mm/memory.c:4041 [inline]
__handle_mm_fault+0x2d78/0x3f80 mm/memory.c:4165
handle_mm_fault+0x1b5/0x690 mm/memory.c:4202
faultin_page mm/gup.c:530 [inline]
__get_user_pages+0x609/0x17a0 mm/gup.c:730
populate_vma_page_range+0x20d/0x2a0 mm/gup.c:1234
__mm_populate+0x204/0x380 mm/gup.c:1282
mm_populate include/linux/mm.h:2323 [inline]
vm_mmap_pgoff+0x213/0x230 mm/util.c:362
ksys_mmap_pgoff+0x4aa/0x630 mm/mmap.c:1586
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline]
__x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #0 (&mm->mmap_sem){++++}:
lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903
__might_fault mm/memory.c:4638 [inline]
__might_fault+0x15e/0x1e0 mm/memory.c:4623
_copy_to_user+0x30/0x120 lib/usercopy.c:25
copy_to_user include/linux/uaccess.h:155 [inline]
mon_bin_read+0x329/0x640 drivers/usb/mon/mon_bin.c:825
do_loop_readv_writev fs/read_write.c:701 [inline]
do_loop_readv_writev fs/read_write.c:688 [inline]
do_iter_read+0x490/0x640 fs/read_write.c:925
vfs_readv+0xf0/0x160 fs/read_write.c:987
do_readv+0x15e/0x370 fs/read_write.c:1020
__do_sys_readv fs/read_write.c:1107 [inline]
__se_sys_readv fs/read_write.c:1104 [inline]
__x64_sys_readv+0x75/0xb0 fs/read_write.c:1104
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rp->fetch_lock);
lock(&mm->mmap_sem);
lock(&rp->fetch_lock);
lock(&mm->mmap_sem);
*** DEADLOCK ***
1 lock held by syz-executor.5/12075:
#0: 000000005cd47723 (&rp->fetch_lock){+.+.}, at: mon_bin_read+0x60/0x640 drivers/usb/mon/mon_bin.c:813
stack backtrace:
CPU: 0 PID: 12075 Comm: syz-executor.5 Not tainted 4.19.85-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+0x197/0x210 lib/dump_stack.c:118
print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1221
check_prev_add kernel/locking/lockdep.c:1861 [inline]
check_prevs_add kernel/locking/lockdep.c:1974 [inline]
validate_chain kernel/locking/lockdep.c:2415 [inline]
__lock_acquire+0x2e19/0x49c0 kernel/locking/lockdep.c:3411
lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903
__might_fault mm/memory.c:4638 [inline]
__might_fault+0x15e/0x1e0 mm/memory.c:4623
_copy_to_user+0x30/0x120 lib/usercopy.c:25
copy_to_user include/linux/uaccess.h:155 [inline]
mon_bin_read+0x329/0x640 drivers/usb/mon/mon_bin.c:825
do_loop_readv_writev fs/read_write.c:701 [inline]
do_loop_readv_writev fs/read_write.c:688 [inline]
do_iter_read+0x490/0x640 fs/read_write.c:925
vfs_readv+0xf0/0x160 fs/read_write.c:987
do_readv+0x15e/0x370 fs/read_write.c:1020
__do_sys_readv fs/read_write.c:1107 [inline]
__se_sys_readv fs/read_write.c:1104 [inline]
__x64_sys_readv+0x75/0xb0 fs/read_write.c:1104
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a639
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f06d094ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a639
RDX: 0000000000000002 RSI: 0000000020000600 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f06d094f6d4
R13: 00000000004c7ecd R14: 00000000004de160 R15: 00000000ffffffff
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
net_ratelimit: 20 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kvm_hv_set_msr: 446 callbacks suppressed
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x4000003e data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x4000000d data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x4000007a data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x40000049 data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x40000018 data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x40000085 data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x40000054 data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x4000005f data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x4000002e data 0x4d00000000f
kvm [13221]: vcpu0, guest rIP: 0x8a Hyper-V uhandled wrmsr: 0x4000006a data 0x4d00000000f
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (00000000740650dd): kobject_uevent_env
kobject: 'kvm' (00000000740650dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000a28620b5): kobject_uevent_env
kobject: 'loop0' (00000000a28620b5): fill_kobj_path: path = '/devices/virtual/block/loop0'