Warning: Permanently added '10.128.1.41' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 432.400404] kauditd_printk_skb: 2 callbacks suppressed [ 432.400419] audit: type=1400 audit(1571260246.929:36): avc: denied { map } for pid=7502 comm="syz-executor054" path="/root/syz-executor054405388" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program [ 432.463611] audit: type=1400 audit(1571260246.989:37): avc: denied { map } for pid=7515 comm="syz-executor054" path="/dev/usbmon0" dev="devtmpfs" ino=16542 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbmon_device_t:s0 tclass=chr_file permissive=1 [ 432.463753] [ 432.490884] ====================================================== [ 432.497197] WARNING: possible circular locking dependency detected [ 432.503515] 4.19.79 #0 Not tainted [ 432.507053] ------------------------------------------------------ executing program executing program executing program executing program executing program executing program executing program [ 432.513371] syz-executor054/7516 is trying to acquire lock: [ 432.519086] 000000003e794a2d (&rp->fetch_lock){+.+.}, at: mon_bin_vma_fault+0x73/0x2d0 [ 432.527353] [ 432.527353] but task is already holding lock: [ 432.533330] 00000000cbb33e13 (&mm->mmap_sem){++++}, at: __mm_populate+0x270/0x380 [ 432.541119] [ 432.541119] which lock already depends on the new lock. [ 432.541119] [ 432.549491] [ 432.549491] the existing dependency chain (in reverse order) is: [ 432.557271] [ 432.557271] -> #1 (&mm->mmap_sem){++++}: executing program executing program executing program executing program [ 432.562846] __might_fault+0x15e/0x1e0 [ 432.567324] _copy_to_user+0x30/0x120 [ 432.571644] mon_bin_read+0x329/0x640 [ 432.576002] __vfs_read+0x114/0x800 [ 432.580140] vfs_read+0x194/0x3d0 [ 432.584110] ksys_read+0x14f/0x2d0 [ 432.588174] __x64_sys_read+0x73/0xb0 [ 432.592567] do_syscall_64+0xfd/0x620 [ 432.597008] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 432.603188] [ 432.603188] -> #0 (&rp->fetch_lock){+.+.}: [ 432.609355] lock_acquire+0x16f/0x3f0 executing program executing program executing program executing program [ 432.613814] __mutex_lock+0xf7/0x1300 [ 432.618221] mutex_lock_nested+0x16/0x20 [ 432.625768] mon_bin_vma_fault+0x73/0x2d0 [ 432.630451] __do_fault+0x111/0x480 [ 432.634587] __handle_mm_fault+0xf6d/0x3f80 [ 432.639421] handle_mm_fault+0x1b5/0x690 [ 432.644031] __get_user_pages+0x609/0x17a0 [ 432.648798] populate_vma_page_range+0x20d/0x2a0 [ 432.654091] __mm_populate+0x204/0x380 [ 432.658581] vm_mmap_pgoff+0x213/0x230 executing program executing program executing program executing program [ 432.662992] ksys_mmap_pgoff+0x4aa/0x630 [ 432.667643] __x64_sys_mmap+0xe9/0x1b0 [ 432.672074] do_syscall_64+0xfd/0x620 [ 432.676406] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 432.682104] [ 432.682104] other info that might help us debug this: [ 432.682104] [ 432.690234] Possible unsafe locking scenario: [ 432.690234] [ 432.696276] CPU0 CPU1 [ 432.700935] ---- ---- [ 432.705582] lock(&mm->mmap_sem); executing program executing program executing program [ 432.709121] lock(&rp->fetch_lock); [ 432.715471] lock(&mm->mmap_sem); [ 432.721514] lock(&rp->fetch_lock); [ 432.725218] [ 432.725218] *** DEADLOCK *** [ 432.725218] [ 432.731298] 1 lock held by syz-executor054/7516: [ 432.736053] #0: 00000000cbb33e13 (&mm->mmap_sem){++++}, at: __mm_populate+0x270/0x380 [ 432.745844] [ 432.745844] stack backtrace: [ 432.750336] CPU: 0 PID: 7516 Comm: syz-executor054 Not tainted 4.19.79 #0 executing program executing program executing program executing program [ 432.757270] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 432.768862] Call Trace: [ 432.771547] dump_stack+0x172/0x1f0 [ 432.775210] print_circular_bug.isra.0.cold+0x1cc/0x28f [ 432.780694] __lock_acquire+0x2e19/0x49c0 [ 432.784995] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 432.790178] ? depot_save_stack+0x1de/0x44f [ 432.794618] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 432.799722] ? lockdep_hardirqs_on+0x415/0x5d0 [ 432.804528] ? mark_held_locks+0x100/0x100 [ 432.808864] ? save_stack+0x45/0xd0 executing program executing program executing program executing program executing program [ 432.812549] ? kasan_kmalloc+0xce/0xf0 [ 432.816441] ? kasan_slab_alloc+0xf/0x20 [ 432.820558] ? kmem_cache_alloc+0x12e/0x700 [ 432.824888] ? __lock_is_held+0xb6/0x140 [ 432.828962] ? __mm_populate+0x204/0x380 [ 432.833025] ? mon_bin_vma_fault+0x73/0x2d0 [ 432.837356] lock_acquire+0x16f/0x3f0 [ 432.841156] ? mon_bin_vma_fault+0x73/0x2d0 [ 432.845475] ? mon_bin_vma_fault+0x73/0x2d0 [ 432.849893] __mutex_lock+0xf7/0x1300 [ 432.853699] ? mon_bin_vma_fault+0x73/0x2d0 [ 432.858007] ? __lock_is_held+0xb6/0x140 executing program executing program executing program executing program executing program [ 432.862230] ? mon_bin_vma_fault+0x73/0x2d0 [ 432.866545] ? mutex_trylock+0x1e0/0x1e0 [ 432.870602] ? __lock_is_held+0xb6/0x140 [ 432.874732] ? rcu_read_lock_sched_held+0x110/0x130 [ 432.879748] ? kmem_cache_alloc+0x32a/0x700 [ 432.884082] mutex_lock_nested+0x16/0x20 [ 432.888147] ? mutex_lock_nested+0x16/0x20 [ 432.892390] mon_bin_vma_fault+0x73/0x2d0 [ 432.896595] __do_fault+0x111/0x480 [ 432.900281] ? mem_cgroup_try_charge_delay+0x6c/0xa0 [ 432.905382] __handle_mm_fault+0xf6d/0x3f80 [ 432.909699] ? vmf_insert_mixed_mkwrite+0x90/0x90 executing program executing program executing program executing program executing program [ 432.914529] ? count_memcg_event_mm+0x2b1/0x4d0 [ 432.919185] handle_mm_fault+0x1b5/0x690 [ 432.923235] __get_user_pages+0x609/0x17a0 [ 432.927468] ? follow_page_mask+0x19d0/0x19d0 [ 432.932045] ? bond_handle_frame+0x5b0/0xbe0 [ 432.936447] ? memset+0x32/0x40 [ 432.939726] populate_vma_page_range+0x20d/0x2a0 [ 432.944492] __mm_populate+0x204/0x380 [ 432.948394] ? populate_vma_page_range+0x2a0/0x2a0 [ 432.953330] vm_mmap_pgoff+0x213/0x230 [ 432.957227] ? vma_is_stack_for_current+0xd0/0xd0 [ 432.962157] ? iterate_fd+0x360/0x360 executing program executing program [ 432.965969] ksys_mmap_pgoff+0x4aa/0x630 [ 432.970051] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 432.974969] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 432.979714] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 432.984473] ? do_syscall_64+0x26/0x620 [ 432.988440] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 432.993800] __x64_sys_mmap+0xe9/0x1b0 [ 432.997681] do_syscall_64+0xfd/0x620 [ 433.001468] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 433.006646] RIP: 0033:0x44a729 executing program executing program executing program executing program executing program [ 433.009842] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 7b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 433.028765] RSP: 002b:00007fce14dd5cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 433.036484] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044a729 [ 433.043841] RDX: 000000000300001f RSI: 0000000000003000 RDI: 0000000020ffa000 [ 433.051241] RBP: 00000000006dbc20 R08: 0000000000000004 R09: 0000000000000000 [ 433.058508] R10: 0000000000002012 R11: 0000000000000246 R12: 00000000006dbc2c executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 433.065763] R13: 00007fffd153fabf R14: 00007fce14dd69c0 R15: 00000000006dbc20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program