audit: type=1400 audit(1571600271.102:117): avc: denied { associate } for pid=7638 comm="syz-executor.3" name="file0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 ====================================================== WARNING: possible circular locking dependency detected 4.14.150 #0 Not tainted ------------------------------------------------------ syz-executor.2/7637 is trying to acquire lock: (&mm->mmap_sem){++++}, at: [] __might_fault+0xe0/0x1d0 mm/memory.c:4583 but task is already holding lock: (&rp->fetch_lock){+.+.}, at: [] mon_bin_read+0x5d/0x5e0 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){+.+.}: lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xe8/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 mon_bin_vma_fault+0x6f/0x280 drivers/usb/mon/mon_bin.c:1236 __do_fault+0x104/0x390 mm/memory.c:3223 do_cow_fault mm/memory.c:3662 [inline] do_fault mm/memory.c:3761 [inline] handle_pte_fault mm/memory.c:3989 [inline] __handle_mm_fault+0xde1/0x3470 mm/memory.c:4113 handle_mm_fault+0x293/0x7c0 mm/memory.c:4150 faultin_page mm/gup.c:514 [inline] __get_user_pages+0x465/0x1220 mm/gup.c:714 populate_vma_page_range+0x18e/0x230 mm/gup.c:1231 __mm_populate+0x198/0x2c0 mm/gup.c:1279 mm_populate include/linux/mm.h:2187 [inline] vm_mmap_pgoff+0x1be/0x1d0 mm/util.c:338 SYSC_mmap_pgoff mm/mmap.c:1551 [inline] SyS_mmap_pgoff+0x3ca/0x520 mm/mmap.c:1509 SYSC_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #0 (&mm->mmap_sem){++++}: check_prev_add kernel/locking/lockdep.c:1901 [inline] check_prevs_add kernel/locking/lockdep.c:2018 [inline] validate_chain kernel/locking/lockdep.c:2460 [inline] __lock_acquire+0x2cb3/0x4620 kernel/locking/lockdep.c:3487 lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994 __might_fault mm/memory.c:4584 [inline] __might_fault+0x143/0x1d0 mm/memory.c:4569 _copy_to_user+0x2c/0xd0 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:155 [inline] mon_bin_read+0x2fb/0x5e0 drivers/usb/mon/mon_bin.c:825 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3e2/0x5b0 fs/read_write.c:919 vfs_readv+0xd3/0x130 fs/read_write.c:981 do_preadv+0x15d/0x200 fs/read_write.c:1065 SYSC_preadv fs/read_write.c:1115 [inline] SyS_preadv+0x31/0x40 fs/read_write.c:1110 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 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.2/7637: #0: (&rp->fetch_lock){+.+.}, at: [] mon_bin_read+0x5d/0x5e0 drivers/usb/mon/mon_bin.c:813 stack backtrace: CPU: 1 PID: 7637 Comm: syz-executor.2 Not tainted 4.14.150 #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+0x138/0x197 lib/dump_stack.c:53 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1901 [inline] check_prevs_add kernel/locking/lockdep.c:2018 [inline] validate_chain kernel/locking/lockdep.c:2460 [inline] __lock_acquire+0x2cb3/0x4620 kernel/locking/lockdep.c:3487 lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994 __might_fault mm/memory.c:4584 [inline] __might_fault+0x143/0x1d0 mm/memory.c:4569 _copy_to_user+0x2c/0xd0 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:155 [inline] mon_bin_read+0x2fb/0x5e0 drivers/usb/mon/mon_bin.c:825 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3e2/0x5b0 fs/read_write.c:919 vfs_readv+0xd3/0x130 fs/read_write.c:981 do_preadv+0x15d/0x200 fs/read_write.c:1065 SYSC_preadv fs/read_write.c:1115 [inline] SyS_preadv+0x31/0x40 fs/read_write.c:1110 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459a59 RSP: 002b:00007f9afdccdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459a59 RDX: 0000000000000004 RSI: 0000000020000300 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000246 R12: 00007f9afdcce6d4 R13: 00000000004c6fcb R14: 00000000004dc818 R15: 00000000ffffffff kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' netlink: 104 bytes leftover after parsing attributes in process `syz-executor.2'. kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env audit: type=1800 audit(1571600271.912:118): pid=7662 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="sda1" ino=16569 res=0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1297 sclass=netlink_route_socket pig=7662 comm=syz-executor.2 kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' netlink: 104 bytes leftover after parsing attributes in process `syz-executor.2'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1297 sclass=netlink_route_socket pig=7662 comm=syz-executor.2 kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' EXT4-fs (loop1): bad geometry: block count 580964351930795064 exceeds size of device (66048 blocks) kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' audit: type=1326 audit(1571600272.752:119): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7720 comm="syz-executor.2" exe="/root/syz-executor.2" sig=31 arch=c000003e syscall=228 compat=0 ip=0x45c89a code=0x0 kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' ptrace attach of "/root/syz-executor.4"[7744] was attempted by "/root/syz-executor.4"[7745] kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env audit: type=1400 audit(1571600273.072:120): avc: denied { create } for pid=7752 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1400 audit(1571600273.112:121): avc: denied { write } for pid=7752 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' audit: type=1326 audit(1571600273.542:122): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7720 comm="syz-executor.2" exe="/root/syz-executor.2" sig=31 arch=c000003e syscall=228 compat=0 ip=0x45c89a code=0x0 kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' binder: BINDER_SET_CONTEXT_MGR already set kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env binder: 7781:7790 ioctl 40046207 0 returned -16 kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'input8' (ffff88805112aea0): kobject_cleanup, parent (null) kobject: 'input8' (ffff88805112aea0): calling ktype release kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'input8': free name kobject: 'input9' (ffff8880a81d10a0): kobject_cleanup, parent (null) kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'input9' (ffff8880a81d10a0): calling ktype release kobject: 'input9': free name kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: '0:43' (ffff88808174c4d0): kobject_add_internal: parent: 'bdi', set: 'devices' kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: '0:43' (ffff88808174c4d0): kobject_uevent_env kobject: '0:43' (ffff88808174c4d0): fill_kobj_path: path = '/devices/virtual/bdi/0:43' kobject: 'loop0' (ffff888055520de0): kobject_uevent_env kobject: 'loop0' (ffff888055520de0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: '0:44' (ffff8880523bb2d0): kobject_add_internal: parent: 'bdi', set: 'devices' kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: '0:44' (ffff8880523bb2d0): kobject_uevent_env kobject: '0:44' (ffff8880523bb2d0): fill_kobj_path: path = '/devices/virtual/bdi/0:44' kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (ffff8880a4a9e920): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: '0:44' (ffff8880523bb2d0): kobject_uevent_env kobject: '0:44' (ffff8880523bb2d0): fill_kobj_path: path = '/devices/virtual/bdi/0:44' kobject: '0:44' (ffff8880523bb2d0): kobject_cleanup, parent (null) kobject: '0:44' (ffff8880523bb2d0): calling ktype release kobject: '0:44': free name kobject: '0:43' (ffff88808174c4d0): kobject_uevent_env kobject: '0:43' (ffff88808174c4d0): fill_kobj_path: path = '/devices/virtual/bdi/0:43' kobject: '0:43' (ffff88808174c4d0): kobject_cleanup, parent (null) kobject: '0:43' (ffff88808174c4d0): calling ktype release kobject: '0:43': free name kobject: 'loop5' (ffff8880a4b40a20): kobject_uevent_env kobject: 'loop5' (ffff8880a4b40a20): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (ffff8880a4a657a0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a657a0): fill_kobj_path: path = '/devices/virtual/block/loop2' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 binder: 8159:8161 ioctl c0306201 0 returned -14 CPU: 1 PID: 8158 Comm: syz-executor.3 Not tainted 4.14.150 #0 kobject: 'loop4' (ffff8880a4adc9a0): kobject_uevent_env 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+0x138/0x197 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10f/0x159 lib/fault-inject.c:149 should_failslab+0xdb/0x130 mm/failslab.c:32 kobject: 'loop4' (ffff8880a4adc9a0): fill_kobj_path: path = '/devices/virtual/block/loop4' slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3297 [inline] kmem_cache_alloc_node+0x287/0x780 mm/slab.c:3640 __alloc_skb+0x9c/0x500 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:980 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1158 [inline] netlink_sendmsg+0x874/0xc60 net/netlink/af_netlink.c:1852 kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env binder: 8168:8170 ioctl c0306201 0 returned -14 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' binder: 8173:8174 ioctl c0306201 0 returned -14 kobject: 'loop1' (ffff8880a4a18ea0): kobject_uevent_env kobject: 'loop1' (ffff8880a4a18ea0): fill_kobj_path: path = '/devices/virtual/block/loop1' __sys_sendmsg+0xb9/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2103 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459a59 RSP: 002b:00007fb8c308cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fb8c308cc90 RCX: 0000000000459a59 RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb8c308d6d4 R13: 00000000004c7be6 R14: 00000000004ddaa8 R15: 0000000000000004 kobject: 'loop5' (ffff8880a4b40a20): kobject_uevent_env kobject: 'loop5' (ffff8880a4b40a20): fill_kobj_path: path = '/devices/virtual/block/loop5' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 8186 Comm: syz-executor.3 Not tainted 4.14.150 #0 kobject: 'loop3' (ffff8880a4a9e920): kobject_uevent_env 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+0x138/0x197 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10f/0x159 lib/fault-inject.c:149 should_failslab+0xdb/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3297 [inline] kmem_cache_alloc_node_trace+0x280/0x770 mm/slab.c:3659 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x3d/0x80 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137 __alloc_skb+0xcf/0x500 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1158 [inline] netlink_sendmsg+0x874/0xc60 net/netlink/af_netlink.c:1852 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062