====================================================== WARNING: possible circular locking dependency detected 5.0.0-rc2+ #28 Not tainted ------------------------------------------------------ syz-executor4/24586 is trying to acquire lock: 00000000f9077113 (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting+0x1d1/0xfe0 fs/proc/base.c:2711 but task is already holding lock: 00000000132f2484 (&p->lock){+.+.}, at: seq_read+0x71/0x1130 fs/seq_file.c:161 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x12f/0x1670 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 seq_read+0x71/0x1130 fs/seq_file.c:161 proc_reg_read+0x29a/0x3c0 fs/proc/inode.c:229 do_loop_readv_writev fs/read_write.c:700 [inline] do_loop_readv_writev fs/read_write.c:687 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:921 vfs_readv+0x175/0x1c0 fs/read_write.c:983 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x50c/0xac0 fs/splice.c:417 do_splice_to+0x12a/0x190 fs/splice.c:880 do_splice+0xff7/0x1410 fs/splice.c:1178 __do_sys_splice fs/splice.c:1419 [inline] __se_sys_splice fs/splice.c:1399 [inline] __x64_sys_splice+0x2c6/0x330 fs/splice.c:1399 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&pipe->mutex/1){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x12f/0x1670 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 __pipe_lock fs/pipe.c:83 [inline] fifo_open+0x159/0xb00 fs/pipe.c:905 do_dentry_open+0x48a/0x1210 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x144f/0x5650 fs/namei.c:3534 do_filp_open+0x26f/0x370 fs/namei.c:3564 do_open_execat+0x20e/0x930 fs/exec.c:856 __do_execve_file.isra.0+0x1966/0x2700 fs/exec.c:1758 do_execveat_common fs/exec.c:1865 [inline] do_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1963 [inline] __se_sys_execve fs/exec.c:1958 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1958 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&sig->cred_guard_mutex){+.+.}: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x12f/0x1670 kernel/locking/mutex.c:1072 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102 do_io_accounting+0x1d1/0xfe0 fs/proc/base.c:2711 proc_tgid_io_accounting+0x23/0x30 fs/proc/base.c:2760 kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env proc_single_show+0xf6/0x180 fs/proc/base.c:739 seq_read+0x4db/0x1130 fs/seq_file.c:229 __vfs_read+0x116/0xb20 fs/read_write.c:416 vfs_read+0x194/0x3e0 fs/read_write.c:452 kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' ksys_pread64+0x183/0x1c0 fs/read_write.c:626 __do_sys_pread64 fs/read_write.c:636 [inline] __se_sys_pread64 fs/read_write.c:633 [inline] __x64_sys_pread64+0x97/0xf0 fs/read_write.c:633 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &sig->cred_guard_mutex --> &pipe->mutex/1 --> &p->lock Possible unsafe locking scenario: CPU0 CPU1 kobject: 'loop0' (00000000daca63c1): kobject_uevent_env ---- ---- lock(&p->lock); lock(&pipe->mutex/1); lock(&p->lock); lock(&sig->cred_guard_mutex); *** DEADLOCK *** 1 lock held by syz-executor4/24586: #0: 00000000132f2484 (&p->lock){+.+.}, at: seq_read+0x71/0x1130 fs/seq_file.c:161 kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' stack backtrace: CPU: 0 PID: 24586 Comm: syz-executor4 Not tainted 5.0.0-rc2+ #28 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+0x1db/0x2d0 lib/dump_stack.c:113 kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224 kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' 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+0x3014/0x4a30 kernel/locking/lockdep.c:3338 lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x12f/0x1670 kernel/locking/mutex.c:1072 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102 do_io_accounting+0x1d1/0xfe0 fs/proc/base.c:2711 proc_tgid_io_accounting+0x23/0x30 fs/proc/base.c:2760 proc_single_show+0xf6/0x180 fs/proc/base.c:739 seq_read+0x4db/0x1130 fs/seq_file.c:229 __vfs_read+0x116/0xb20 fs/read_write.c:416 vfs_read+0x194/0x3e0 fs/read_write.c:452 ksys_pread64+0x183/0x1c0 fs/read_write.c:626 __do_sys_pread64 fs/read_write.c:636 [inline] __se_sys_pread64 fs/read_write.c:633 [inline] __x64_sys_pread64+0x97/0xf0 fs/read_write.c:633 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2c871d4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2c871d56d4 R13: 00000000004c4907 R14: 00000000004d7f58 R15: 00000000ffffffff 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 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' net_ratelimit: 12 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 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env protocol 88fb is buggy, dev hsr_slave_0 kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env syz-executor0 invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' CPU: 1 PID: 24856 Comm: syz-executor0 Not tainted 5.0.0-rc2+ #28 kobject: 'loop1' (00000000a6a9dc28): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 dump_header+0x1e6/0x116c mm/oom_kill.c:451 kobject: 'loop1' (00000000a6a9dc28): fill_kobj_path: path = '/devices/virtual/block/loop1' oom_kill_process.cold+0x10/0x9d4 mm/oom_kill.c:966 out_of_memory+0x885/0x1420 mm/oom_kill.c:1133 mem_cgroup_out_of_memory+0x160/0x210 mm/memcontrol.c:1393 mem_cgroup_oom mm/memcontrol.c:1721 [inline] try_charge+0x12a9/0x19b0 mm/memcontrol.c:2283 mem_cgroup_try_charge+0x43a/0xdb0 mm/memcontrol.c:5913 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:5928 shmem_getpage_gfp+0xa85/0x4b70 mm/shmem.c:1790 shmem_getpage mm/shmem.c:134 [inline] shmem_write_begin+0x105/0x1e0 mm/shmem.c:2385 generic_perform_write+0x2a0/0x6b0 mm/filemap.c:3208 __generic_file_write_iter+0x25e/0x630 mm/filemap.c:3333 generic_file_write_iter+0x34e/0x6a0 mm/filemap.c:3361 call_write_iter include/linux/fs.h:1862 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x764/0xb40 fs/read_write.c:487 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0x105/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcf1787dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 00000000ffdbc2ca RSI: 0000000020000080 RDI: 0000000000000003 kobject: 'loop3' (000000009c115182): kobject_uevent_env RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcf1787e6d4 kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' R13: 00000000004c7192 R14: 00000000004dca58 R15: 00000000ffffffff memory: usage 307168kB, limit 307200kB, failcnt 89 memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: cache:259256KB rss:39480KB rss_huge:36864KB shmem:259316KB mapped_file:3300KB dirty:0KB writeback:0KB swap:0KB inactive_anon:251232KB active_anon:47632KB inactive_file:0KB active_file:0KB unevictable:0KB oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=syz0,mems_allowed=0-1,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor0,pid=18844,uid=0 kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env Memory cgroup out of memory: Kill process 18844 (syz-executor0) score 1111 or sacrifice child kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' Killed process 18844 (syz-executor0) total-vm:70656kB, anon-rss:164kB, file-rss:33756kB, shmem-rss:3288kB oom_reaper: reaped process 18844 (syz-executor0), now anon-rss:0kB, file-rss:32796kB, shmem-rss:3288kB kobject: 'input39' (00000000e26c7f9f): kobject_cleanup, parent (null) kobject: 'input39' (00000000e26c7f9f): calling ktype release kobject: 'input39': free name kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'input35' (00000000fd77595d): kobject_cleanup, parent (null) kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'input30' (000000008af26b7a): kobject_cleanup, parent (null) kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'input35' (00000000fd77595d): calling ktype release kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'input35': free name kobject: 'input30' (000000008af26b7a): calling ktype release kobject: 'input30': free name kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (00000000d388f656): kobject_uevent_env kobject: 'kvm' (00000000d388f656): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000d388f656): kobject_uevent_env kobject: 'kvm' (00000000d388f656): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'batman_adv' (0000000005c251f7): kobject_uevent_env kobject: 'batman_adv' (0000000005c251f7): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (0000000005c251f7): kobject_cleanup, parent (null) kobject: 'batman_adv' (0000000005c251f7): calling ktype release kobject: (0000000005c251f7): dynamic_kobj_release kobject: 'batman_adv': free name kobject: 'rx-0' (000000004326b4ed): kobject_cleanup, parent 0000000025d2f915 kobject: 'rx-0' (000000004326b4ed): auto cleanup 'remove' event kobject: 'rx-0' (000000004326b4ed): kobject_uevent_env kobject: 'rx-0' (000000004326b4ed): fill_kobj_path: path = '/devices/virtual/net/syz_tun/queues/rx-0' kobject: 'rx-0' (000000004326b4ed): auto cleanup kobject_del kobject: 'rx-0' (000000004326b4ed): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (00000000a6f0b307): kobject_cleanup, parent 0000000025d2f915 kobject: 'tx-0' (00000000a6f0b307): auto cleanup 'remove' event kobject: 'tx-0' (00000000a6f0b307): kobject_uevent_env kobject: 'tx-0' (00000000a6f0b307): fill_kobj_path: path = '/devices/virtual/net/syz_tun/queues/tx-0' kobject: 'tx-0' (00000000a6f0b307): auto cleanup kobject_del kobject: 'tx-0' (00000000a6f0b307): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (0000000025d2f915): kobject_cleanup, parent (null) kobject: 'queues' (0000000025d2f915): calling ktype release kobject: 'queues' (0000000025d2f915): kset_release kobject: 'queues': free name kobject: 'syz_tun' (000000002f60395c): kobject_uevent_env kobject: 'syz_tun' (000000002f60395c): fill_kobj_path: path = '/devices/virtual/net/syz_tun' kobject: 'syz_tun' (000000002f60395c): kobject_cleanup, parent (null) kobject: 'syz_tun' (000000002f60395c): calling ktype release kobject: 'syz_tun': free name kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' IPVS: ftp: loaded support on port[0] = 21 kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'lo' (000000004c4dccd8): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'loop2' (0000000074f62c3c): kobject_uevent_env kobject: 'loop2' (0000000074f62c3c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'lo' (000000004c4dccd8): kobject_uevent_env kobject: 'lo' (000000004c4dccd8): fill_kobj_path: path = '/devices/virtual/net/lo' kobject: 'loop5' (000000000a6e0b37): kobject_uevent_env kobject: 'queues' (000000008540f1fe): kobject_add_internal: parent: 'lo', set: '' kobject: 'loop5' (000000000a6e0b37): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'queues' (000000008540f1fe): kobject_uevent_env kobject: 'queues' (000000008540f1fe): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000e6453243): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'loop0' (00000000daca63c1): kobject_uevent_env kobject: 'rx-0' (00000000e6453243): kobject_uevent_env kobject: 'rx-0' (00000000e6453243): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' kobject: 'tx-0' (0000000036d43a9f): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'loop0' (00000000daca63c1): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'tx-0' (0000000036d43a9f): kobject_uevent_env kobject: 'tx-0' (0000000036d43a9f): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' kobject: 'loop4' (00000000bd4be30e): kobject_uevent_env kobject: 'tunl0' (00000000d6d704e2): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'loop4' (00000000bd4be30e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'tunl0' (00000000d6d704e2): kobject_uevent_env kobject: 'tunl0' (00000000d6d704e2): fill_kobj_path: path = '/devices/virtual/net/tunl0' kobject: 'queues' (00000000e4b0677f): kobject_add_internal: parent: 'tunl0', set: '' kobject: 'queues' (00000000e4b0677f): kobject_uevent_env kobject: 'queues' (00000000e4b0677f): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000008c762c9f): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000008c762c9f): kobject_uevent_env kobject: 'rx-0' (000000008c762c9f): fill_kobj_path: path = '/devices/virtual/net/tunl0/queues/rx-0' kobject: 'tx-0' (0000000097b27ed7): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (0000000097b27ed7): kobject_uevent_env kobject: 'tx-0' (0000000097b27ed7): fill_kobj_path: path = '/devices/virtual/net/tunl0/queues/tx-0' kobject: 'gre0' (00000000ca907b4f): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'gre0' (00000000ca907b4f): kobject_uevent_env kobject: 'gre0' (00000000ca907b4f): fill_kobj_path: path = '/devices/virtual/net/gre0' kobject: 'queues' (000000005806b9f9): kobject_add_internal: parent: 'gre0', set: '' kobject: 'queues' (000000005806b9f9): kobject_uevent_env kobject: 'queues' (000000005806b9f9): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000e9305464): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000e9305464): kobject_uevent_env kobject: 'rx-0' (00000000e9305464): fill_kobj_path: path = '/devices/virtual/net/gre0/queues/rx-0' kobject: 'tx-0' (0000000094dba1fb): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (0000000094dba1fb): kobject_uevent_env kobject: 'tx-0' (0000000094dba1fb): fill_kobj_path: path = '/devices/virtual/net/gre0/queues/tx-0' kobject: 'gretap0' (00000000f6f33b8b): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'gretap0' (00000000f6f33b8b): kobject_uevent_env kobject: 'gretap0' (00000000f6f33b8b): fill_kobj_path: path = '/devices/virtual/net/gretap0' kobject: 'queues' (00000000ea5b176d): kobject_add_internal: parent: 'gretap0', set: '' kobject: 'queues' (00000000ea5b176d): kobject_uevent_env kobject: 'queues' (00000000ea5b176d): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000b710bc57): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000b710bc57): kobject_uevent_env kobject: 'rx-0' (00000000b710bc57): fill_kobj_path: path = '/devices/virtual/net/gretap0/queues/rx-0' kobject: 'tx-0' (00000000e187cf43): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000e187cf43): kobject_uevent_env kobject: 'tx-0' (00000000e187cf43): fill_kobj_path: path = '/devices/virtual/net/gretap0/queues/tx-0' kobject: 'batman_adv' (0000000056935d90): kobject_add_internal: parent: 'gretap0', set: '' kobject: 'erspan0' (00000000f841840a): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'erspan0' (00000000f841840a): kobject_uevent_env kobject: 'erspan0' (00000000f841840a): fill_kobj_path: path = '/devices/virtual/net/erspan0' kobject: 'queues' (000000006342826a): kobject_add_internal: parent: 'erspan0', set: '' kobject: 'queues' (000000006342826a): kobject_uevent_env kobject: 'queues' (000000006342826a): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (0000000078427ee1): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (0000000078427ee1): kobject_uevent_env kobject: 'rx-0' (0000000078427ee1): fill_kobj_path: path = '/devices/virtual/net/erspan0/queues/rx-0' kobject: 'tx-0' (000000005e331b9b): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000005e331b9b): kobject_uevent_env kobject: 'tx-0' (000000005e331b9b): fill_kobj_path: path = '/devices/virtual/net/erspan0/queues/tx-0' kobject: 'batman_adv' (000000001c03f36c): kobject_add_internal: parent: 'erspan0', set: '' kobject: 'ip_vti0' (000000002030c566): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'loop3' (000000009c115182): kobject_uevent_env kobject: 'ip_vti0' (000000002030c566): kobject_uevent_env kobject: 'loop3' (000000009c115182): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'ip_vti0' (000000002030c566): fill_kobj_path: path = '/devices/virtual/net/ip_vti0' kobject: 'queues' (00000000399d1589): kobject_add_internal: parent: 'ip_vti0', set: '' kobject: 'queues' (00000000399d1589): kobject_uevent_env kobject: 'queues' (00000000399d1589): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (0000000076fedbe5): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (0000000076fedbe5): kobject_uevent_env kobject: 'rx-0' (0000000076fedbe5): fill_kobj_path: path = '/devices/virtual/net/ip_vti0/queues/rx-0' kobject: 'tx-0' (00000000c9593942): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000c9593942): kobject_uevent_env kobject: 'tx-0' (00000000c9593942): fill_kobj_path: path = '/devices/virtual/net/ip_vti0/queues/tx-0' kobject: 'ip6_vti0' (00000000a31fb5d4): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'ip6_vti0' (00000000a31fb5d4): kobject_uevent_env kobject: 'ip6_vti0' (00000000a31fb5d4): fill_kobj_path: path = '/devices/virtual/net/ip6_vti0' kobject: 'queues' (00000000399d51cb): kobject_add_internal: parent: 'ip6_vti0', set: '' kobject: 'queues' (00000000399d51cb): kobject_uevent_env kobject: 'queues' (00000000399d51cb): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000a282b16a): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000a282b16a): kobject_uevent_env kobject: 'rx-0' (00000000a282b16a): fill_kobj_path: path = '/devices/virtual/net/ip6_vti0/queues/rx-0' kobject: 'tx-0' (00000000be155a69): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000be155a69): kobject_uevent_env kobject: 'tx-0' (00000000be155a69): fill_kobj_path: path = '/devices/virtual/net/ip6_vti0/queues/tx-0' kobject: 'sit0' (00000000ec8d3114): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'sit0' (00000000ec8d3114): kobject_uevent_env kobject: 'sit0' (00000000ec8d3114): fill_kobj_path: path = '/devices/virtual/net/sit0' kobject: 'queues' (0000000008e23879): kobject_add_internal: parent: 'sit0', set: '' kobject: 'queues' (0000000008e23879): kobject_uevent_env kobject: 'queues' (0000000008e23879): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000ffb26778): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000ffb26778): kobject_uevent_env kobject: 'rx-0' (00000000ffb26778): fill_kobj_path: path = '/devices/virtual/net/sit0/queues/rx-0' kobject: 'tx-0' (0000000090e89f5c): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (0000000090e89f5c): kobject_uevent_env kobject: 'tx-0' (0000000090e89f5c): fill_kobj_path: path = '/devices/virtual/net/sit0/queues/tx-0' kobject: 'ip6tnl0' (000000000c26b0f5): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'ip6tnl0' (000000000c26b0f5): kobject_uevent_env kobject: 'ip6tnl0' (000000000c26b0f5): fill_kobj_path: path = '/devices/virtual/net/ip6tnl0' kobject: 'queues' (00000000724b6ee5): kobject_add_internal: parent: 'ip6tnl0', set: '' kobject: 'queues' (00000000724b6ee5): kobject_uevent_env kobject: 'queues' (00000000724b6ee5): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000b4e35e9a): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000b4e35e9a): kobject_uevent_env kobject: 'rx-0' (00000000b4e35e9a): fill_kobj_path: path = '/devices/virtual/net/ip6tnl0/queues/rx-0' kobject: 'tx-0' (000000006bd03a44): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000006bd03a44): kobject_uevent_env kobject: 'tx-0' (000000006bd03a44): fill_kobj_path: path = '/devices/virtual/net/ip6tnl0/queues/tx-0' kobject: 'ip6gre0' (000000001c61d139): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'ip6gre0' (000000001c61d139): kobject_uevent_env kobject: 'ip6gre0' (000000001c61d139): fill_kobj_path: path = '/devices/virtual/net/ip6gre0' kobject: 'queues' (000000000f576aab): kobject_add_internal: parent: 'ip6gre0', set: '' kobject: 'queues' (000000000f576aab): kobject_uevent_env kobject: 'queues' (000000000f576aab): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000004796c6e9): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000004796c6e9): kobject_uevent_env kobject: 'rx-0' (000000004796c6e9): fill_kobj_path: path = '/devices/virtual/net/ip6gre0/queues/rx-0' kobject: 'tx-0' (00000000d423af06): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000d423af06): kobject_uevent_env kobject: 'tx-0' (00000000d423af06): fill_kobj_path: path = '/devices/virtual/net/ip6gre0/queues/tx-0' kobject: 'syz_tun' (0000000004c4b759): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'syz_tun' (0000000004c4b759): kobject_uevent_env kobject: 'syz_tun' (0000000004c4b759): fill_kobj_path: path = '/devices/virtual/net/syz_tun' kobject: 'queues' (00000000e64d21d4): kobject_add_internal: parent: 'syz_tun', set: '' kobject: 'queues' (00000000e64d21d4): kobject_uevent_env