squashfs: SQUASHFS error: Major/Minor mismatch, older Squashfs 0.0 filesystems are unsupported capability: warning: `syz-executor.4' uses 32-bit capabilities (legacy support in use) EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue INFO: task syz-executor.0:16372 blocked for more than 140 seconds. Not tainted 4.19.149-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D25656 16372 6521 0x80000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x8e5/0x22e0 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline] _synchronize_rcu_expedited+0x667/0x7b0 kernel/rcu/tree_exp.h:667 synchronize_rcu+0xd5/0x170 kernel/rcu/tree_plugin.h:818 synchronize_net+0x47/0x50 net/core/dev.c:9268 xfrm_user_net_exit+0x94/0x150 net/xfrm/xfrm_user.c:3353 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156 setup_net+0x3d1/0x720 net/core/net_namespace.c:332 copy_net_ns+0x22c/0x36a net/core/net_namespace.c:438 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107 copy_namespaces+0x37f/0x420 kernel/nsproxy.c:165 copy_process.part.0+0x3e1f/0x7fb0 kernel/fork.c:1900 copy_process kernel/fork.c:1694 [inline] _do_fork+0x22f/0x1020 kernel/fork.c:2207 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45dd99 Code: 89 0c 24 89 44 24 08 e8 45 00 00 00 48 8b 44 24 10 48 89 04 24 e8 07 0a 00 00 48 8b 44 24 10 48 8b 4c 24 08 48 89 4c 24 30 48 <89> 44 24 38 48 8b 6c 24 18 48 83 c4 20 c3 e8 44 73 00 00 e9 ff fe RSP: 002b:00007f4b726d8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000001fc0 RCX: 000000000045dd99 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000000050000103 RBP: 000000000118c0c0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118c07c R13: 00007ffd76b608af R14: 00007f4b726d99c0 R15: 000000000118c07c Showing all locks held in the system: 1 lock held by khungtaskd/1095: #0: 00000000b601b0d9 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x291 kernel/locking/lockdep.c:4440 1 lock held by in:imklog/6191: 1 lock held by syz-executor.0/16372: #0: 000000001dc21e29 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x20d/0x36a net/core/net_namespace.c:434 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1095 Comm: khungtaskd Not tainted 4.19.149-syzkaller #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+0x22c/0x33e lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x18/0x3d lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0xa62/0x1020 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3704 Comm: systemd-journal Not tainted 4.19.149-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:task_irq_context kernel/locking/lockdep.c:3038 [inline] RIP: 0010:__lock_acquire+0x3da/0x3ff0 kernel/locking/lockdep.c:3360 Code: 54 08 00 00 49 8d be 74 08 00 00 ba 02 00 00 00 48 89 f9 85 c0 0f 45 c2 48 c1 e9 03 48 ba 00 00 00 00 00 fc ff df 0f b6 0c 11 <48> 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 18 29 00 00 41 RSP: 0018:ffff888094497808 EFLAGS: 00000807 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff888094488e08 RDI: ffff888094488df4 RBP: 0000000000000000 R08: 0000000000000099 R09: fffffbfff19c162f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888094488e08 R14: ffff888094488580 R15: ffffffff89846c80 FS: 00007fd182fde8c0(0000) GS:ffff8880ae300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd1803fb000 CR3: 0000000095e76000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3907 __fs_reclaim_acquire mm/page_alloc.c:3758 [inline] fs_reclaim_acquire+0x105/0x130 mm/page_alloc.c:3769 slab_pre_alloc_hook mm/slab.h:419 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x25/0x4a0 mm/slab.c:3557 kmem_cache_zalloc include/linux/slab.h:699 [inline] file_alloc_security security/selinux/hooks.c:390 [inline] selinux_file_alloc_security+0xe4/0x1c0 security/selinux/hooks.c:3612 security_file_alloc+0x40/0x90 security/security.c:880 __alloc_file+0xc9/0x330 fs/file_table.c:105 alloc_empty_file+0x6d/0x170 fs/file_table.c:150 path_openat+0x12b/0x2e90 fs/namei.c:3526 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd18256e840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffcaa6e53e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffcaa6e56f0 RCX: 00007fd18256e840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055e090bba320 RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055e090bae060 R14: 00007ffcaa6e56b0 R15: 000055e090bbb460