EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue overlayfs: workdir and upperdir must reside under the same mount ====================================================== WARNING: possible circular locking dependency detected 4.19.84 #0 Not tainted ------------------------------------------------------ syz-executor.2/23972 is trying to acquire lock: 000000004c002253 (&mm->mmap_sem){++++}, at: __might_fault+0xfb/0x1e0 mm/memory.c:4637 but task is already holding lock: 000000004f7d20b0 (&rp->fetch_lock){+.+.}, at: mon_bin_read+0x60/0x640 drivers/usb/mon/mon_bin.c:813 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&rp->fetch_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 mon_bin_vma_fault+0x73/0x2d0 drivers/usb/mon/mon_bin.c:1237 __do_fault+0x111/0x480 mm/memory.c:3269 do_cow_fault mm/memory.c:3710 [inline] do_fault mm/memory.c:3812 [inline] handle_pte_fault mm/memory.c:4041 [inline] __handle_mm_fault+0xf6d/0x3f80 mm/memory.c:4165 handle_mm_fault+0x1b5/0x690 mm/memory.c:4202 faultin_page mm/gup.c:530 [inline] __get_user_pages+0x609/0x17a0 mm/gup.c:730 populate_vma_page_range+0x20d/0x2a0 mm/gup.c:1234 __mm_populate+0x204/0x380 mm/gup.c:1282 mm_populate include/linux/mm.h:2323 [inline] vm_mmap_pgoff+0x213/0x230 mm/util.c:362 ksys_mmap_pgoff+0x4aa/0x630 mm/mmap.c:1586 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&mm->mmap_sem){++++}: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __might_fault mm/memory.c:4638 [inline] __might_fault+0x15e/0x1e0 mm/memory.c:4623 _copy_to_user+0x30/0x120 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:155 [inline] mon_bin_read+0x329/0x640 drivers/usb/mon/mon_bin.c:825 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x490/0x640 fs/read_write.c:925 vfs_readv+0xf0/0x160 fs/read_write.c:987 do_preadv+0x1c4/0x280 fs/read_write.c:1071 __do_sys_preadv fs/read_write.c:1121 [inline] __se_sys_preadv fs/read_write.c:1116 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1116 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rp->fetch_lock); lock(&mm->mmap_sem); lock(&rp->fetch_lock); lock(&mm->mmap_sem); *** DEADLOCK *** 1 lock held by syz-executor.2/23972: #0: 000000004f7d20b0 (&rp->fetch_lock){+.+.}, at: mon_bin_read+0x60/0x640 drivers/usb/mon/mon_bin.c:813 stack backtrace: CPU: 1 PID: 23972 Comm: syz-executor.2 Not tainted 4.19.84 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1861 [inline] check_prevs_add kernel/locking/lockdep.c:1974 [inline] validate_chain kernel/locking/lockdep.c:2415 [inline] __lock_acquire+0x2e19/0x49c0 kernel/locking/lockdep.c:3411 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __might_fault mm/memory.c:4638 [inline] __might_fault+0x15e/0x1e0 mm/memory.c:4623 _copy_to_user+0x30/0x120 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:155 [inline] mon_bin_read+0x329/0x640 drivers/usb/mon/mon_bin.c:825 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x490/0x640 fs/read_write.c:925 vfs_readv+0xf0/0x160 fs/read_write.c:987 syz-executor.1 invoked oom-killer: gfp_mask=0x6000c0(GFP_KERNEL), nodemask=(null), order=0, oom_score_adj=1000 do_preadv+0x1c4/0x280 fs/read_write.c:1071 __do_sys_preadv fs/read_write.c:1121 [inline] __se_sys_preadv fs/read_write.c:1116 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1116 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a639 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8bd9466c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045a639 RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8bd94676d4 R13: 00000000004c7eb1 R14: 00000000004dddd0 R15: 00000000ffffffff protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop1' (00000000f4125086): kobject_uevent_env kobject: 'loop1' (00000000f4125086): fill_kobj_path: path = '/devices/virtual/block/loop1' syz-executor.1 cpuset=syz1 mems_allowed=0-1 kobject: 'loop0' (0000000000a34441): kobject_uevent_env CPU: 0 PID: 23987 Comm: syz-executor.1 Not tainted 4.19.84 #0 kobject: 'loop0' (0000000000a34441): fill_kobj_path: path = '/devices/virtual/block/loop0' Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 dump_header+0x15e/0xa55 mm/oom_kill.c:441 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954 out_of_memory mm/oom_kill.c:1130 [inline] out_of_memory+0x362/0x1330 mm/oom_kill.c:1062 mem_cgroup_out_of_memory+0x1d2/0x240 mm/memcontrol.c:1416 memory_max_write+0x169/0x300 mm/memcontrol.c:5594 cgroup_file_write+0x241/0x790 kernel/cgroup/cgroup.c:3465 kernfs_fop_write+0x2b8/0x480 fs/kernfs/file.c:316 __vfs_write+0x114/0x810 fs/read_write.c:485 vfs_write+0x20c/0x560 fs/read_write.c:549 ksys_write+0x14f/0x2d0 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:608 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a639 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f32711bbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a639 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f32711bc6d4 R13: 00000000004caf76 R14: 00000000004e3440 R15: 00000000ffffffff kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000a5db3557): kobject_cleanup, parent (null) kobject: 'loop3' (00000000a5db3557): calling ktype release kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop3': free name overlayfs: unrecognized mount option "workdiÒ./file1" or missing value Task in /syz1 killed as a result of limit of /syz1 memory: usage 17004kB, limit 0kB, failcnt 0 kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop0' (0000000000a34441): kobject_uevent_env kobject: 'loop0' (0000000000a34441): fill_kobj_path: path = '/devices/virtual/block/loop0' Memory cgroup stats for /syz1: cache:60KB rss:10928KB rss_huge:10240KB shmem:0KB mapped_file:132KB dirty:0KB writeback:0KB swap:0KB inactive_anon:0KB active_anon:10952KB inactive_file:4KB active_file:8KB unevictable:0KB kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env Memory cgroup out of memory: Kill process 23777 (syz-executor.1) score 9536000 or sacrifice child kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' Killed process 23777 (syz-executor.1) total-vm:72720kB, anon-rss:2208kB, file-rss:35804kB, shmem-rss:0kB kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000002d802301): kobject_uevent_env syz-executor.1 invoked oom-killer: gfp_mask=0x6000c0(GFP_KERNEL), nodemask=(null), order=0, oom_score_adj=1000 kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' syz-executor.1 cpuset=syz1 mems_allowed=0-1 EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock CPU: 0 PID: 23984 Comm: syz-executor.1 Not tainted 4.19.84 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 EXT4-fs (loop3): ext4_check_descriptors: Inode table for group 0 overlaps superblock Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 dump_header+0x15e/0xa55 mm/oom_kill.c:441 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954 out_of_memory mm/oom_kill.c:1130 [inline] out_of_memory+0x362/0x1330 mm/oom_kill.c:1062 mem_cgroup_out_of_memory+0x1d2/0x240 mm/memcontrol.c:1416 mem_cgroup_oom mm/memcontrol.c:1742 [inline] try_charge+0xec5/0x1490 mm/memcontrol.c:2313 mem_cgroup_try_charge+0x259/0x6b0 mm/memcontrol.c:5991 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:6006 do_anonymous_page mm/memory.c:3182 [inline] handle_pte_fault mm/memory.c:4039 [inline] __handle_mm_fault+0x1e50/0x3f80 mm/memory.c:4165 handle_mm_fault+0x1b5/0x690 mm/memory.c:4202 __do_page_fault+0x62a/0xe90 arch/x86/mm/fault.c:1390 do_page_fault+0x71/0x57d arch/x86/mm/fault.c:1465 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1204 RIP: 0033:0x411e2f Code: 0f 84 c8 02 00 00 48 83 bd 78 ff ff ff 00 0f 84 f9 04 00 00 48 8b 95 68 ff ff ff 44 89 95 38 ff ff ff 4c 8d ac 10 00 f7 ff ff <49> 89 85 90 06 00 00 49 8d 85 10 03 00 00 49 89 95 98 06 00 00 41 RSP: 002b:00007ffc80710980 EFLAGS: 00010206 RAX: 00007f327117b000 RBX: 0000000000020000 RCX: 000000000045a68a RDX: 0000000000021000 RSI: 0000000000021000 RDI: 0000000000000000 RBP: 00007ffc80710a60 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc80710b50 R13: 00007f327119b700 R14: 0000000000000002 R15: 000000000075c07c kobject: 'loop3' (00000000118eb424): kobject_add_internal: parent: 'ext4', set: '' EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue kobject: 'loop3' (000000002d802301): kobject_uevent_env XFS (loop2): Invalid superblock magic number kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' Task in /syz1 killed as a result of limit of /syz1 memory: usage 14588kB, limit 0kB, failcnt 8 kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000118eb424): kobject_cleanup, parent (null) overlayfs: unrecognized mount option "workdiÒ./file1" or missing value kobject: 'loop3' (00000000118eb424): calling ktype release kobject: 'loop3': free name memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (0000000000a34441): kobject_uevent_env kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop0' (0000000000a34441): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' EXT4-fs (loop4): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop4): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock kobject: 'loop4' (000000006cb5aab1): kobject_add_internal: parent: 'ext4', set: '' EXT4-fs (loop3): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue kobject: 'loop3' (00000000e2b0e01a): kobject_add_internal: parent: 'ext4', set: '' kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' Memory cgroup stats for /syz1: cache:60KB rss:8780KB rss_huge:8192KB shmem:0KB mapped_file:132KB dirty:0KB writeback:0KB swap:0KB inactive_anon:0KB active_anon:8772KB inactive_file:0KB active_file:8KB unevictable:0KB EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue XFS (loop2): Invalid superblock magic number Memory cgroup out of memory: Kill process 23303 (syz-executor.1) score 9535000 or sacrifice child Killed process 23303 (syz-executor.1) total-vm:72588kB, anon-rss:2200kB, file-rss:35808kB, shmem-rss:0kB kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000006cb5aab1): kobject_cleanup, parent (null) kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop4' (000000006cb5aab1): calling ktype release kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4': free name kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000e2b0e01a): kobject_cleanup, parent (null) syz-executor.1 invoked oom-killer: gfp_mask=0x7080c0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), nodemask=(null), order=3, oom_score_adj=0 kobject: 'loop3' (00000000e2b0e01a): calling ktype release kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop1' (00000000f4125086): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000f4125086): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3': free name syz-executor.1 cpuset=syz1 mems_allowed=0-1 CPU: 1 PID: 21383 Comm: syz-executor.1 Not tainted 4.19.84 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 dump_header+0x15e/0xa55 mm/oom_kill.c:441 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954 out_of_memory mm/oom_kill.c:1130 [inline] out_of_memory+0x362/0x1330 mm/oom_kill.c:1062 mem_cgroup_out_of_memory+0x1d2/0x240 mm/memcontrol.c:1416 mem_cgroup_oom mm/memcontrol.c:1742 [inline] try_charge+0xec5/0x1490 mm/memcontrol.c:2313 memcg_kmem_charge_memcg+0x83/0x170 mm/memcontrol.c:2643 memcg_kmem_charge+0x136/0x370 mm/memcontrol.c:2686 __alloc_pages_nodemask+0x3c3/0x750 mm/page_alloc.c:4421 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] alloc_pages_node include/linux/gfp.h:523 [inline] alloc_thread_stack_node kernel/fork.c:241 [inline] dup_task_struct kernel/fork.c:806 [inline] copy_process.part.0+0x3e0/0x7a30 kernel/fork.c:1732 copy_process kernel/fork.c:1689 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2202 __do_sys_clone kernel/fork.c:2309 [inline] __se_sys_clone kernel/fork.c:2303 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2303 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c0a Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 RSP: 002b:00007ffc80710bd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc80710bd0 RCX: 0000000000458c0a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc80710c10 R08: 0000000000000001 R09: 0000000001141940 R10: 0000000001141c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc80710c60 Task in /syz1 killed as a result of limit of /syz1 memory: usage 9952kB, limit 0kB, failcnt 25 kobject: 'loop3' (000000002d802301): kobject_uevent_env memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz1: cache:60KB rss:4596KB rss_huge:4096KB shmem:0KB mapped_file:132KB dirty:0KB writeback:0KB swap:0KB inactive_anon:0KB active_anon:4504KB inactive_file:4KB active_file:4KB unevictable:0KB Memory cgroup out of memory: Kill process 23131 (syz-executor.1) score 9534000 or sacrifice child Killed process 23131 (syz-executor.1) total-vm:72720kB, anon-rss:2208kB, file-rss:35796kB, shmem-rss:0kB kobject: 'loop4' (000000004643c0f2): kobject_uevent_env oom_reaper: reaped process 23131 (syz-executor.1), now anon-rss:0kB, file-rss:34836kB, shmem-rss:0kB kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' syz-executor.1 invoked oom-killer: gfp_mask=0x7080c0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), nodemask=(null), order=3, oom_score_adj=0 syz-executor.1 cpuset=syz1 mems_allowed=0-1 CPU: 1 PID: 21383 Comm: syz-executor.1 Not tainted 4.19.84 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 dump_header+0x15e/0xa55 mm/oom_kill.c:441 kobject: 'loop0' (0000000000a34441): kobject_uevent_env oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954 kobject: 'loop0' (0000000000a34441): fill_kobj_path: path = '/devices/virtual/block/loop0' out_of_memory mm/oom_kill.c:1130 [inline] out_of_memory+0x362/0x1330 mm/oom_kill.c:1062 kobject: 'loop3' (000000002d802301): kobject_uevent_env mem_cgroup_out_of_memory+0x1d2/0x240 mm/memcontrol.c:1416 kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' mem_cgroup_oom mm/memcontrol.c:1742 [inline] try_charge+0xec5/0x1490 mm/memcontrol.c:2313 memcg_kmem_charge_memcg+0x83/0x170 mm/memcontrol.c:2643 memcg_kmem_charge+0x136/0x370 mm/memcontrol.c:2686 __alloc_pages_nodemask+0x3c3/0x750 mm/page_alloc.c:4421 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] alloc_pages_node include/linux/gfp.h:523 [inline] alloc_thread_stack_node kernel/fork.c:241 [inline] dup_task_struct kernel/fork.c:806 [inline] copy_process.part.0+0x3e0/0x7a30 kernel/fork.c:1732 copy_process kernel/fork.c:1689 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2202 __do_sys_clone kernel/fork.c:2309 [inline] __se_sys_clone kernel/fork.c:2303 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2303 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c0a Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 RSP: 002b:00007ffc80710bd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc80710bd0 RCX: 0000000000458c0a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc80710c10 R08: 0000000000000001 R09: 0000000001141940 R10: 0000000001141c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc80710c60 Task in EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock /syz1 killed as a result of limit of EXT4-fs (loop3): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop3): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock kobject: 'loop3' (00000000626885e6): kobject_add_internal: parent: 'ext4', set: '' EXT4-fs (loop4): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop4): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs: failed to create workqueue /syz1 memory: usage 7596kB, limit 0kB, failcnt 33 EXT4-fs (loop4): mount failed memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz1: cache:60KB rss:2332KB rss_huge:2048KB shmem:0KB mapped_file:132KB dirty:0KB writeback:0KB swap:0KB inactive_anon:0KB active_anon:2320KB inactive_file:0KB active_file:0KB unevictable:0KB Memory cgroup out of memory: Kill process 21448 (syz-executor.1) score 9530000 or sacrifice child Killed process 21448 (syz-executor.1) total-vm:72588kB, anon-rss:2192kB, file-rss:35796kB, shmem-rss:0kB kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env syz-executor.0 invoked oom-killer: gfp_mask=0x6000c0(GFP_KERNEL), nodemask=(null), order=0, oom_score_adj=1000 oom_reaper: reaped process 21448 (syz-executor.1), now anon-rss:0kB, file-rss:34836kB, shmem-rss:0kB syz-executor.0 cpuset= kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' syz0 mems_allowed=0-1 CPU: 0 PID: 24097 Comm: syz-executor.0 Not tainted 4.19.84 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 dump_header+0x15e/0xa55 mm/oom_kill.c:441 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954 out_of_memory mm/oom_kill.c:1130 [inline] out_of_memory+0x362/0x1330 mm/oom_kill.c:1062 mem_cgroup_out_of_memory+0x1d2/0x240 mm/memcontrol.c:1416 memory_max_write+0x169/0x300 mm/memcontrol.c:5594 cgroup_file_write+0x241/0x790 kernel/cgroup/cgroup.c:3465 kernfs_fop_write+0x2b8/0x480 fs/kernfs/file.c:316 __vfs_write+0x114/0x810 fs/read_write.c:485 vfs_write+0x20c/0x560 fs/read_write.c:549 ksys_write+0x14f/0x2d0 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:608 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 kobject: 'loop3' (000000002d802301): kobject_uevent_env entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a639 kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2c28d19c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a639 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2c28d1a6d4 R13: 00000000004caf76 R14: 00000000004e3440 R15: 00000000ffffffff EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000626885e6): kobject_cleanup, parent (null) kobject: 'loop3' (00000000626885e6): calling ktype release kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop3': free name kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' Task in /syz0 killed as a result of limit of /syz0 memory: usage 6968kB, limit 0kB, failcnt 0 kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop4): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop3' (000000002d802301): kobject_uevent_env EXT4-fs (loop4): ext4_check_descriptors: Inode table for group 0 overlaps superblock kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' Memory cgroup stats for /syz0: cache:40KB rss:2296KB rss_huge:2048KB shmem:144KB mapped_file:0KB dirty:0KB writeback:0KB swap:0KB inactive_anon:4KB active_anon:2224KB inactive_file:12KB active_file:16KB unevictable:0KB kobject: 'loop4' (00000000d126e1e0): kobject_add_internal: parent: 'ext4', set: '' kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' Memory cgroup out of memory: Kill process 24090 (syz-executor.0) score 9276000 or sacrifice child kobject: 'loop4' (000000004643c0f2): kobject_uevent_env Killed process 24097 (syz-executor.0) total-vm:72720kB, anon-rss:2208kB, file-rss:35852kB, shmem-rss:0kB kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' oom_reaper: reaped process 24097 (syz-executor.0), now anon-rss:0kB, file-rss:34892kB, shmem-rss:0kB XFS (loop2): Invalid superblock magic number syz-executor.0 invoked oom-killer: gfp_mask=0x604050(GFP_NOFS|__GFP_COMP|__GFP_RECLAIMABLE), nodemask=(null), order=0, oom_score_adj=0 syz-executor.0 cpuset=syz0 mems_allowed=0-1 kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop4' (00000000d126e1e0): kobject_cleanup, parent (null) kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000d126e1e0): calling ktype release CPU: 1 PID: 23873 Comm: syz-executor.0 Not tainted 4.19.84 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 dump_header+0x15e/0xa55 mm/oom_kill.c:441 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954 out_of_memory mm/oom_kill.c:1130 [inline] out_of_memory+0x362/0x1330 mm/oom_kill.c:1062 mem_cgroup_out_of_memory+0x1d2/0x240 mm/memcontrol.c:1416 mem_cgroup_oom mm/memcontrol.c:1742 [inline] try_charge+0xec5/0x1490 mm/memcontrol.c:2313 memcg_kmem_charge_memcg+0x83/0x170 mm/memcontrol.c:2643 memcg_charge_slab mm/slab.h:284 [inline] kmem_getpages mm/slab.c:1418 [inline] cache_grow_begin+0x3fa/0x8c0 mm/slab.c:2682 fallback_alloc+0x1fd/0x2d0 mm/slab.c:3224 ____cache_alloc_node+0x1be/0x1e0 mm/slab.c:3292 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc+0x1f3/0x700 mm/slab.c:3557 ext4_alloc_inode+0x1f/0x630 fs/ext4/super.c:1070 alloc_inode+0x64/0x190 fs/inode.c:210 iget_locked+0x196/0x4a0 fs/inode.c:1168 __ext4_iget+0x27b/0x3f80 fs/ext4/inode.c:4838 ext4_lookup fs/ext4/namei.c:1590 [inline] ext4_lookup+0x389/0x6b0 fs/ext4/namei.c:1560 __lookup_slow+0x279/0x500 fs/namei.c:1671 lookup_slow+0x58/0x80 fs/namei.c:1688 mountpoint_last fs/namei.c:2665 [inline] path_mountpoint+0x5d2/0x1e60 fs/namei.c:2695 filename_mountpoint+0x18e/0x390 fs/namei.c:2717 kobject: 'loop4': free name user_path_mountpoint_at+0x3a/0x50 fs/namei.c:2747 ksys_umount+0x164/0xe70 fs/namespace.c:1645 __do_sys_umount fs/namespace.c:1671 [inline] __se_sys_umount fs/namespace.c:1669 [inline] __x64_sys_umount+0x54/0x80 fs/namespace.c:1669 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45d067 Code: 64 89 04 25 d0 02 00 00 58 5f ff d0 48 89 c7 e8 2f be ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 4d 8c fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffebbdbdf78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 00000000000c35d1 RCX: 000000000045d067 RDX: 0000000000403a60 RSI: 0000000000000002 RDI: 00007ffebbdbe020 RBP: 000000000000001a R08: 0000000000000000 R09: 000000000000000e R10: 000000000000000a R11: 0000000000000202 R12: 00007ffebbdbf0b0 R13: 0000000001a0a940 R14: 0000000000000000 R15: 00007ffebbdbf0b0 net_ratelimit: 20 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 Task in /syz0 killed as a result of limit of /syz0 memory: usage 4552kB, limit 0kB, failcnt 12 memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: cache:40KB rss:180KB rss_huge:0KB shmem:144KB mapped_file:0KB dirty:0KB writeback:0KB swap:0KB inactive_anon:4KB active_anon:68KB inactive_file:16KB active_file:12KB unevictable:0KB kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' Memory cgroup out of memory: Kill process 23873 (syz-executor.0) score 9002000 or sacrifice child kobject: 'loop3' (000000002d802301): kobject_uevent_env Killed process 23873 (syz-executor.0) total-vm:72456kB, anon-rss:108kB, file-rss:35776kB, shmem-rss:0kB kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' syz-executor.1 invoked oom-killer: gfp_mask=0x7080c0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), nodemask=(null), order=3, oom_score_adj=0 oom_reaper: reaped process 23873 (syz-executor.0), now anon-rss:0kB, file-rss:34880kB, shmem-rss:0kB syz-executor.1 cpuset=syz1 mems_allowed=0-1 CPU: 0 PID: 21383 Comm: syz-executor.1 Not tainted 4.19.84 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 dump_header+0x15e/0xa55 mm/oom_kill.c:441 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954 out_of_memory mm/oom_kill.c:1130 [inline] out_of_memory+0x362/0x1330 mm/oom_kill.c:1062 mem_cgroup_out_of_memory+0x1d2/0x240 mm/memcontrol.c:1416 mem_cgroup_oom mm/memcontrol.c:1742 [inline] try_charge+0xec5/0x1490 mm/memcontrol.c:2313 memcg_kmem_charge_memcg+0x83/0x170 mm/memcontrol.c:2643 memcg_kmem_charge+0x136/0x370 mm/memcontrol.c:2686 __alloc_pages_nodemask+0x3c3/0x750 mm/page_alloc.c:4421 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] alloc_pages_node include/linux/gfp.h:523 [inline] alloc_thread_stack_node kernel/fork.c:241 [inline] dup_task_struct kernel/fork.c:806 [inline] copy_process.part.0+0x3e0/0x7a30 kernel/fork.c:1732 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 copy_process kernel/fork.c:1689 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2202 __do_sys_clone kernel/fork.c:2309 [inline] __se_sys_clone kernel/fork.c:2303 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2303 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c0a Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 protocol 88fb is buggy, dev hsr_slave_0 RSP: 002b:00007ffc80710bd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc80710bd0 RCX: 0000000000458c0a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc80710c10 R08: 0000000000000001 R09: 0000000001141940 R10: 0000000001141c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc80710c60 Task in protocol 88fb is buggy, dev hsr_slave_1 /syz1 killed as a result of limit of /syz1 kobject: 'loop4' (000000004643c0f2): kobject_uevent_env memory: usage 5044kB, limit 0kB, failcnt 39 kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock Memory cgroup stats for /syz1: cache:60KB rss:152KB rss_huge:0KB shmem:0KB mapped_file:132KB dirty:0KB writeback:0KB swap:0KB inactive_anon:0KB active_anon:156KB inactive_file:0KB active_file:0KB unevictable:0KB kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env EXT4-fs (loop4): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' Memory cgroup out of memory: Kill process 21383 (syz-executor.1) score 9002000 or sacrifice child kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' Killed process 23297 (syz-executor.1) total-vm:72588kB, anon-rss:120kB, file-rss:34816kB, shmem-rss:0kB EXT4-fs (loop4): ext4_check_descriptors: Inode table for group 0 overlaps superblock syz-executor.1 invoked oom-killer: gfp_mask=0x7080c0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), nodemask=(null), order=3, oom_score_adj=0 kobject: 'loop4' (00000000426a13b6): kobject_add_internal: parent: 'ext4', set: '' kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' syz-executor.1 cpuset=syz1 mems_allowed=0-1 EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue CPU: 0 PID: 21383 Comm: syz-executor.1 Not tainted 4.19.84 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 dump_header+0x15e/0xa55 mm/oom_kill.c:441 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954 out_of_memory mm/oom_kill.c:1130 [inline] out_of_memory+0x362/0x1330 mm/oom_kill.c:1062 mem_cgroup_out_of_memory+0x1d2/0x240 mm/memcontrol.c:1416 mem_cgroup_oom mm/memcontrol.c:1742 [inline] try_charge+0xec5/0x1490 mm/memcontrol.c:2313 memcg_kmem_charge_memcg+0x83/0x170 mm/memcontrol.c:2643 memcg_kmem_charge+0x136/0x370 mm/memcontrol.c:2686 __alloc_pages_nodemask+0x3c3/0x750 mm/page_alloc.c:4421 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] alloc_pages_node include/linux/gfp.h:523 [inline] alloc_thread_stack_node kernel/fork.c:241 [inline] dup_task_struct kernel/fork.c:806 [inline] copy_process.part.0+0x3e0/0x7a30 kernel/fork.c:1732 copy_process kernel/fork.c:1689 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2202 __do_sys_clone kernel/fork.c:2309 [inline] __se_sys_clone kernel/fork.c:2303 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2303 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c0a Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 RSP: 002b:00007ffc80710bd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc80710bd0 RCX: 0000000000458c0a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc80710c10 R08: 0000000000000001 R09: 0000000001141940 R10: 0000000001141c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc80710c60 kobject: 'batman_adv' (00000000d63f14b8): kobject_uevent_env kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'batman_adv' (00000000d63f14b8): kobject_uevent_env: filter function caused the event to drop! kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' Task in /syz1 killed as a result of limit of /syz1 kobject: 'batman_adv' (00000000d63f14b8): kobject_cleanup, parent (null) memory: usage 4796kB, limit 0kB, failcnt 45 XFS (loop2): Invalid superblock magic number kobject: 'batman_adv' (00000000d63f14b8): calling ktype release memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop4' (00000000426a13b6): kobject_cleanup, parent (null) kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 kobject: 'loop4' (00000000426a13b6): calling ktype release kobject: 'loop4': free name kobject: (00000000d63f14b8): dynamic_kobj_release Memory cgroup stats for /syz1: cache:60KB rss:152KB rss_huge:0KB shmem:0KB mapped_file:132KB dirty:0KB writeback:0KB swap:0KB inactive_anon:0KB active_anon:60KB inactive_file:0KB active_file:0KB unevictable:0KB kobject: 'loop3' (000000002d802301): kobject_uevent_env Memory cgroup out of memory: Kill process 21383 (syz-executor.1) score 9002000 or sacrifice child Killed process 21383 (syz-executor.1) total-vm:72456kB, anon-rss:108kB, file-rss:35776kB, shmem-rss:0kB kobject: 'batman_adv': free name oom_reaper: reaped process 21383 (syz-executor.1), now anon-rss:0kB, file-rss:34880kB, shmem-rss:0kB kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'rx-0' (000000005934a8e8): kobject_cleanup, parent 000000008c74c591 kobject: 'rx-0' (000000005934a8e8): auto cleanup 'remove' event kobject: 'rx-0' (000000005934a8e8): kobject_uevent_env kobject: 'rx-0' (000000005934a8e8): fill_kobj_path: path = '/devices/virtual/net/syz_tun/queues/rx-0' kobject: 'rx-0' (000000005934a8e8): auto cleanup kobject_del kobject: 'rx-0' (000000005934a8e8): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (00000000a29636b8): kobject_cleanup, parent 000000008c74c591 kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'tx-0' (00000000a29636b8): auto cleanup 'remove' event kobject: 'tx-0' (00000000a29636b8): kobject_uevent_env kobject: 'tx-0' (00000000a29636b8): fill_kobj_path: path = '/devices/virtual/net/syz_tun/queues/tx-0' kobject: 'tx-0' (00000000a29636b8): auto cleanup kobject_del kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'tx-0' (00000000a29636b8): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (000000008c74c591): kobject_cleanup, parent (null) kobject: 'queues' (000000008c74c591): calling ktype release kobject: 'queues' (000000008c74c591): kset_release kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'queues': free name kobject: 'syz_tun' (00000000e045ebce): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'syz_tun' (00000000e045ebce): fill_kobj_path: path = '/devices/virtual/net/syz_tun' kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'batman_adv' (00000000316db1c8): kobject_uevent_env kobject: 'batman_adv' (00000000316db1c8): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000316db1c8): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000316db1c8): calling ktype release kobject: (00000000316db1c8): dynamic_kobj_release kobject: 'batman_adv': free name kobject: 'rx-0' (000000000f70c27a): kobject_cleanup, parent 00000000feff5c63 kobject: 'rx-0' (000000000f70c27a): auto cleanup 'remove' event kobject: 'rx-0' (000000000f70c27a): kobject_uevent_env kobject: 'rx-0' (000000000f70c27a): fill_kobj_path: path = '/devices/virtual/net/syz_tun/queues/rx-0' kobject: 'rx-0' (000000000f70c27a): auto cleanup kobject_del kobject: 'rx-0' (000000000f70c27a): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (00000000cd127fc8): kobject_cleanup, parent 00000000feff5c63 kobject: 'tx-0' (00000000cd127fc8): auto cleanup 'remove' event kobject: 'tx-0' (00000000cd127fc8): kobject_uevent_env kobject: 'tx-0' (00000000cd127fc8): fill_kobj_path: path = '/devices/virtual/net/syz_tun/queues/tx-0' kobject: 'tx-0' (00000000cd127fc8): auto cleanup kobject_del kobject: 'tx-0' (00000000cd127fc8): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000feff5c63): kobject_cleanup, parent (null) kobject: 'queues' (00000000feff5c63): calling ktype release kobject: 'queues' (00000000feff5c63): kset_release kobject: 'queues': free name kobject: 'syz_tun' (00000000ac678b67): kobject_uevent_env kobject: 'syz_tun' (00000000ac678b67): fill_kobj_path: path = '/devices/virtual/net/syz_tun' kobject: 'syz_tun' (00000000e045ebce): kobject_cleanup, parent (null) kobject: 'syz_tun' (00000000e045ebce): calling ktype release kobject: 'syz_tun': free name kobject: 'rx-0' (000000009e43550b): kobject_cleanup, parent 0000000096d655c9 kobject: 'rx-0' (000000009e43550b): auto cleanup 'remove' event kobject: 'rx-0' (000000009e43550b): kobject_uevent_env kobject: 'rx-0' (000000009e43550b): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (000000009e43550b): auto cleanup kobject_del kobject: 'rx-0' (000000009e43550b): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (000000006d3a74b3): kobject_cleanup, parent 0000000096d655c9 kobject: 'tx-0' (000000006d3a74b3): auto cleanup 'remove' event kobject: 'tx-0' (000000006d3a74b3): kobject_uevent_env kobject: 'tx-0' (000000006d3a74b3): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (000000006d3a74b3): auto cleanup kobject_del kobject: 'tx-0' (000000006d3a74b3): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (0000000096d655c9): kobject_cleanup, parent (null) kobject: 'queues' (0000000096d655c9): calling ktype release kobject: 'queues' (0000000096d655c9): kset_release kobject: 'queues': free name kobject: 'ip6gre0' (00000000016a1968): kobject_uevent_env kobject: 'ip6gre0' (00000000016a1968): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (00000000b718a17b): kobject_uevent_env kobject: 'batman_adv' (00000000b718a17b): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000b718a17b): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000b718a17b): calling ktype release kobject: (00000000b718a17b): dynamic_kobj_release kobject: 'batman_adv': free name kobject: 'rx-0' (0000000028dd3aee): kobject_cleanup, parent 00000000e0ee263a kobject: 'rx-0' (0000000028dd3aee): auto cleanup 'remove' event kobject: 'rx-0' (0000000028dd3aee): kobject_uevent_env kobject: 'rx-0' (0000000028dd3aee): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (0000000028dd3aee): auto cleanup kobject_del kobject: 'rx-0' (0000000028dd3aee): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (00000000ee83db62): kobject_cleanup, parent 00000000e0ee263a kobject: 'tx-0' (00000000ee83db62): auto cleanup 'remove' event kobject: 'tx-0' (00000000ee83db62): kobject_uevent_env kobject: 'tx-0' (00000000ee83db62): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (00000000ee83db62): auto cleanup kobject_del kobject: 'tx-0' (00000000ee83db62): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000e0ee263a): kobject_cleanup, parent (null) kobject: 'queues' (00000000e0ee263a): calling ktype release kobject: 'queues' (00000000e0ee263a): kset_release kobject: 'queues': free name kobject: 'ip6gretap0' (00000000eb8633ab): kobject_uevent_env kobject: 'ip6gretap0' (00000000eb8633ab): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'syz_tun' (00000000ac678b67): kobject_cleanup, parent (null) kobject: 'syz_tun' (00000000ac678b67): calling ktype release kobject: 'syz_tun': free name kobject: 'ip6gre0' (00000000016a1968): kobject_cleanup, parent (null) kobject: 'ip6gre0' (00000000016a1968): calling ktype release kobject: 'ip6gre0': free name kobject: 'ip6gretap0' (00000000eb8633ab): kobject_cleanup, parent (null) kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'ip6gretap0' (00000000eb8633ab): calling ktype release kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'ip6gretap0': free name kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock XFS (loop2): Invalid superblock magic number EXT4-fs (loop4): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop3): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop4): ext4_check_descriptors: Inode table for group 0 overlaps superblock kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000004a813800): kobject_add_internal: parent: 'ext4', set: '' kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'rx-0' (0000000098c20efb): kobject_cleanup, parent 00000000a863debc kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000fab5f838): kobject_add_internal: parent: 'ext4', set: '' EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue kobject: 'rx-0' (0000000098c20efb): auto cleanup 'remove' event kobject: 'rx-0' (0000000098c20efb): kobject_uevent_env kobject: 'rx-0' (0000000098c20efb): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop3' (000000002d802301): kobject_uevent_env EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue kobject: 'rx-0' (0000000098c20efb): auto cleanup kobject_del kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'rx-0' (0000000098c20efb): calling ktype release kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'rx-0': free name kobject: 'tx-0' (000000001c6fc8d9): kobject_cleanup, parent 00000000a863debc kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop4' (00000000fab5f838): kobject_cleanup, parent (null) kobject: 'tx-0' (000000001c6fc8d9): auto cleanup 'remove' event kobject: 'loop4' (00000000fab5f838): calling ktype release kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'tx-0' (000000001c6fc8d9): kobject_uevent_env kobject: 'loop4': free name kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'tx-0' (000000001c6fc8d9): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop3' (000000004a813800): kobject_cleanup, parent (null) kobject: 'tx-0' (000000001c6fc8d9): auto cleanup kobject_del kobject: 'loop3' (000000004a813800): calling ktype release kobject: 'tx-0' (000000001c6fc8d9): calling ktype release kobject: 'loop3': free name kobject: 'tx-0': free name kobject: 'queues' (00000000a863debc): kobject_cleanup, parent (null) kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'queues' (00000000a863debc): calling ktype release kobject: 'queues' (00000000a863debc): kset_release kobject: 'queues': free name kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'ip6tnl0' (0000000048c1505a): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'ip6tnl0' (0000000048c1505a): kobject_uevent_env: uevent_suppress caused the event to drop! XFS (loop2): Invalid superblock magic number kobject: 'ip6tnl0' (0000000048c1505a): kobject_cleanup, parent (null) kobject: 'ip6tnl0' (0000000048c1505a): calling ktype release kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'ip6tnl0': free name kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env EXT4-fs (loop4): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' EXT4-fs (loop3): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop4): ext4_check_descriptors: Inode table for group 0 overlaps superblock kobject: 'rx-0' (0000000049134e8f): kobject_cleanup, parent 00000000860fa256 kobject: 'loop4' (0000000033d0c0cf): kobject_add_internal: parent: 'ext4', set: '' kobject: 'loop3' (000000007b2f8b38): kobject_add_internal: parent: 'ext4', set: '' kobject: 'rx-0' (0000000049134e8f): auto cleanup 'remove' event EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue kobject: 'rx-0' (0000000049134e8f): kobject_uevent_env kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'rx-0' (0000000049134e8f): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' XFS (loop2): Invalid superblock magic number kobject: 'rx-0' (0000000049134e8f): auto cleanup kobject_del kobject: 'rx-0' (0000000049134e8f): calling ktype release kobject: 'rx-0': free name kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'tx-0' (0000000089e6888e): kobject_cleanup, parent 00000000860fa256 kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'tx-0' (0000000089e6888e): auto cleanup 'remove' event kobject: 'loop3' (000000007b2f8b38): kobject_cleanup, parent (null) kobject: 'loop3' (000000007b2f8b38): calling ktype release kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'tx-0' (0000000089e6888e): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3': free name kobject: 'tx-0' (0000000089e6888e): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop4' (0000000033d0c0cf): kobject_cleanup, parent (null) kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop4' (0000000033d0c0cf): calling ktype release kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4': free name kobject: 'tx-0' (0000000089e6888e): auto cleanup kobject_del kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'tx-0' (0000000089e6888e): calling ktype release kobject: 'tx-0': free name kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'queues' (00000000860fa256): kobject_cleanup, parent (null) kobject: 'queues' (00000000860fa256): calling ktype release kobject: 'queues' (00000000860fa256): kset_release kobject: 'queues': free name kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'sit0' (00000000cccb6774): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'sit0' (00000000cccb6774): kobject_uevent_env: uevent_suppress caused the event to drop! EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' EXT4-fs (loop3): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'sit0' (00000000cccb6774): kobject_cleanup, parent (null) kobject: 'sit0' (00000000cccb6774): calling ktype release EXT4-fs (loop3): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop4): bad geometry: block count 4664 exceeds size of device (32 blocks) kobject: 'sit0': free name kobject: 'loop3' (0000000093c9e38f): kobject_add_internal: parent: 'ext4', set: '' kobject: 'loop4' (000000004643c0f2): kobject_uevent_env EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000002d802301): kobject_uevent_env XFS (loop2): Invalid superblock magic number kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000093c9e38f): kobject_cleanup, parent (null) kobject: 'loop3' (0000000093c9e38f): calling ktype release kobject: 'loop3': free name kobject: 'loop3' (000000002d802301): kobject_uevent_env kobject: 'loop3' (000000002d802301): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'rx-0' (000000004d0871aa): kobject_cleanup, parent 00000000a8bb4e50 kobject: 'rx-0' (000000004d0871aa): auto cleanup 'remove' event kobject: 'rx-0' (000000004d0871aa): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'rx-0' (000000004d0871aa): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000005dad9ea9): kobject_uevent_env kobject: 'rx-0' (000000004d0871aa): auto cleanup kobject_del kobject: 'loop2' (000000005dad9ea9): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'rx-0' (000000004d0871aa): calling ktype release EXT4-fs (loop4): bad geometry: block count 4664 exceeds size of device (32 blocks) kobject: 'rx-0': free name kobject: 'tx-0' (00000000fbcbf0da): kobject_cleanup, parent 00000000a8bb4e50 kobject: 'tx-0' (00000000fbcbf0da): auto cleanup 'remove' event kobject: 'tx-0' (00000000fbcbf0da): kobject_uevent_env kobject: 'tx-0' (00000000fbcbf0da): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop4' (000000004643c0f2): kobject_uevent_env kobject: 'loop4' (000000004643c0f2): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'tx-0' (00000000fbcbf0da): auto cleanup kobject_del