FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value attempt to access beyond end of device ====================================================== WARNING: possible circular locking dependency detected 5.0.0-rc6+ #74 Not tainted ------------------------------------------------------ syz-executor.5/7311 is trying to acquire lock: 00000000a4373017 (&mm->mmap_sem){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] 00000000a4373017 (&mm->mmap_sem){++++}, at: __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 but task is already holding lock: 00000000ad9a2b9c (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:757 [inline] 00000000ad9a2b9c (&sb->s_type->i_mutex_key#12){+.+.}, at: generic_file_write_iter+0xdf/0x610 mm/filemap.c:3358 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sb->s_type->i_mutex_key#12){+.+.}: down_write+0x38/0x90 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:757 [inline] shmem_fallocate+0x15a/0xc60 mm/shmem.c:2633 ashmem_shrink_scan drivers/staging/android/ashmem.c:455 [inline] ashmem_shrink_scan+0x1d7/0x4f0 drivers/staging/android/ashmem.c:439 ashmem_ioctl+0x2f0/0x11a0 drivers/staging/android/ashmem.c:797 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (ashmem_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 ashmem_mmap+0x55/0x520 drivers/staging/android/ashmem.c:361 call_mmap include/linux/fs.h:1868 [inline] mmap_region+0xc37/0x1760 mm/mmap.c:1786 do_mmap+0x8e2/0x1080 mm/mmap.c:1559 do_mmap_pgoff include/linux/mm.h:2379 [inline] vm_mmap_pgoff+0x1c5/0x230 mm/util.c:350 ksys_mmap_pgoff+0x4aa/0x630 mm/mmap.c:1609 __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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&mm->mmap_sem){++++}: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 down_read+0x3b/0x90 kernel/locking/rwsem.c:24 do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 do_page_fault+0x71/0x581 arch/x86/mm/fault.c:1572 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 fault_in_pages_readable include/linux/pagemap.h:603 [inline] iov_iter_fault_in_readable+0x1ba/0x450 lib/iov_iter.c:425 generic_perform_write+0x195/0x530 mm/filemap.c:3198 __generic_file_write_iter+0x25e/0x630 mm/filemap.c:3333 generic_file_write_iter+0x360/0x610 mm/filemap.c:3361 call_write_iter include/linux/fs.h:1863 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x613/0x8e0 fs/read_write.c:487 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_pwrite64+0x183/0x1c0 fs/read_write.c:652 __do_sys_pwrite64 fs/read_write.c:662 [inline] __se_sys_pwrite64 fs/read_write.c:659 [inline] __x64_sys_pwrite64+0x97/0xf0 fs/read_write.c:659 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &mm->mmap_sem --> ashmem_mutex --> &sb->s_type->i_mutex_key#12 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#12); lock(ashmem_mutex); lock(&sb->s_type->i_mutex_key#12); lock(&mm->mmap_sem); *** DEADLOCK *** 2 locks held by syz-executor.5/7311: #0: 000000001c432673 (sb_writers#5){.+.+}, at: file_start_write include/linux/fs.h:2816 [inline] #0: 000000001c432673 (sb_writers#5){.+.+}, at: vfs_write+0x429/0x580 fs/read_write.c:548 #1: 00000000ad9a2b9c (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:757 [inline] #1: 00000000ad9a2b9c (&sb->s_type->i_mutex_key#12){+.+.}, at: generic_file_write_iter+0xdf/0x610 mm/filemap.c:3358 stack backtrace: CPU: 0 PID: 7311 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #74 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+0x172/0x1f0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2350 [inline] __lock_acquire+0x2f00/0x4700 kernel/locking/lockdep.c:3338 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 down_read+0x3b/0x90 kernel/locking/rwsem.c:24 do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 do_page_fault+0x71/0x581 arch/x86/mm/fault.c:1572 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:603 [inline] RIP: 0010:iov_iter_fault_in_readable+0x1ba/0x450 lib/iov_iter.c:425 Code: 4c 39 f3 76 17 eb 3b e8 04 2b 47 fe 48 81 c3 00 10 00 00 48 39 9d 68 ff ff ff 72 2d e8 ef 2a 47 fe 0f 1f 00 0f ae e8 45 31 f6 <8a> 13 0f 1f 00 31 ff 44 89 f6 41 88 57 d0 e8 53 2c 47 fe 45 85 f6 RSP: 0018:ffff888090ce79b8 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000020200000 RCX: ffffc90005b41000 RDX: 0000000000040000 RSI: ffffffff8328b621 RDI: 0000000000000005 RBP: ffff888090ce7a58 R08: ffff888086c58400 R09: fffff9400037b177 R10: fffff9400037b176 R11: ffffea0001bd8bb7 R12: 0000000000001000 R13: 0000000000001000 R14: 0000000000000000 R15: ffff888090ce7a30 generic_perform_write+0x195/0x530 mm/filemap.c:3198 __generic_file_write_iter+0x25e/0x630 mm/filemap.c:3333 generic_file_write_iter+0x360/0x610 mm/filemap.c:3361 call_write_iter include/linux/fs.h:1863 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x613/0x8e0 fs/read_write.c:487 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_pwrite64+0x183/0x1c0 fs/read_write.c:652 __do_sys_pwrite64 fs/read_write.c:662 [inline] __se_sys_pwrite64 fs/read_write.c:659 [inline] __x64_sys_pwrite64+0x97/0xf0 fs/read_write.c:659 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411f77 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 c7 f9 ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 0d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f6538b52a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 0000000020000110 RCX: 0000000000411f77 RDX: 0000000008100000 RSI: 0000000020010000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000118 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004dbcb0 R15: 00000000ffffffff loop3: rw=2049, want=130, limit=112 kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' attempt to access beyond end of device loop3: rw=2049, want=130, limit=112 kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' audit: type=1804 audit(1550366800.475:216): pid=7339 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/472/file0" dev="sda1" ino=17516 res=1 kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' FAT-fs (loop3): bogus number of reserved sectors kobject: 'loop5' (00000000d2795490): kobject_uevent_env FAT-fs (loop3): Can't find a valid FAT filesystem kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' audit: type=1804 audit(1550366801.179:217): pid=7339 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/472/file0" dev="sda1" ino=17516 res=1 Process accounting resumed audit: type=1804 audit(1550366801.179:218): pid=7398 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/472/file0" dev="sda1" ino=17516 res=1 Process accounting resumed kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem audit: type=1804 audit(1550366801.526:219): pid=7417 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/473/file0" dev="sda1" ino=17518 res=1 kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' attempt to access beyond end of device loop3: rw=2049, want=130, limit=112 kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' attempt to access beyond end of device FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value loop3: rw=2049, want=130, limit=112 kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' attempt to access beyond end of device loop5: rw=2049, want=130, limit=112 kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' attempt to access beyond end of device loop5: rw=2049, want=130, limit=112 kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' Process accounting resumed kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' audit: type=1804 audit(1550366802.458:220): pid=7500 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/474/file0" dev="sda1" ino=17553 res=1 FAT-fs (loop5): invalid media value (0x24) FAT-fs (loop5): Can't find a valid FAT filesystem kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value attempt to access beyond end of device loop3: rw=2049, want=130, limit=112 kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' attempt to access beyond end of device kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' loop3: rw=2049, want=130, limit=112 kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' FAT-fs (loop5): invalid media value (0x24) Process accounting resumed FAT-fs (loop5): Can't find a valid FAT filesystem kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' audit: type=1804 audit(1550366803.410:221): pid=7561 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/475/file0" dev="sda1" ino=17549 res=1 kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' Process accounting resumed kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' attempt to access beyond end of device kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env loop5: rw=2049, want=130, limit=112 kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env audit: type=1804 audit(1550366804.382:222): pid=7610 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/476/file0" dev="sda1" ino=17564 res=1 kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env Process accounting resumed kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' audit: type=1804 audit(1550366805.295:223): pid=7667 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/477/file0" dev="sda1" ino=17546 res=1 kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' Process accounting resumed kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' audit: type=1804 audit(1550366806.257:224): pid=7721 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/478/file0" dev="sda1" ino=17509 res=1 kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' audit: type=1804 audit(1550366806.435:225): pid=7728 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir028851061/syzkaller.Hhd1Mv/912/file0" dev="sda1" ino=17512 res=1 audit: type=1804 audit(1550366806.435:226): pid=7728 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir028851061/syzkaller.Hhd1Mv/912/file0" dev="sda1" ino=17512 res=1 kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' Process accounting resumed kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env audit: type=1804 audit(1550366807.228:227): pid=7778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/479/file0" dev="sda1" ino=17112 res=1 kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' FAT-fs (loop1): Unrecognized mount option "euid<18446744073709551615" or missing value kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' FAT-fs (loop1): bogus number of reserved sectors kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env FAT-fs (loop1): Can't find a valid FAT filesystem kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' Process accounting resumed kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env FAT-fs (loop1): bogus number of reserved sectors kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' FAT-fs (loop1): Can't find a valid FAT filesystem audit: type=1804 audit(1550366808.151:228): pid=7831 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/480/file0" dev="sda1" ino=17126 res=1 kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3' Process accounting resumed kobject: 'loop2' (00000000d10f5727): kobject_uevent_env kobject: 'loop2' (00000000d10f5727): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000b5f1ef33): kobject_uevent_env kobject: 'loop4' (00000000b5f1ef33): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d613e4b3): kobject_uevent_env kobject: 'loop1' (00000000d613e4b3): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000d2795490): kobject_uevent_env audit: type=1804 audit(1550366809.152:229): pid=7885 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir822558294/syzkaller.JxzSQy/481/file0" dev="sda1" ino=17586 res=1 kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000d2795490): kobject_uevent_env kobject: 'loop5' (00000000d2795490): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (00000000acbeb39a): kobject_uevent_env kobject: 'loop0' (00000000acbeb39a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000ffe49bf0): kobject_uevent_env kobject: 'loop3' (00000000ffe49bf0): fill_kobj_path: path = '/devices/virtual/block/loop3'