protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_0 kernel tried to execute NX-protected page - exploit attempt? (uid: 0) kobject: 'loop5' (00000000ea619e75): kobject_uevent_env BUG: unable to handle kernel paging request at ffff888052020ff0 PGD b001067 P4D b001067 PUD 9b17e063 PMD 5c206063 PTE 8000000052020163 Oops: 0011 [#1] PREEMPT SMP KASAN CPU: 0 PID: 27369 Comm: syz-executor.3 Not tainted 4.19.53+ #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop5' (00000000ea619e75): fill_kobj_path: path = '/devices/virtual/block/loop5' RIP: 0010:0xffff888052020ff0 Code: 00 00 03 00 00 00 00 00 00 00 10 89 5c 89 80 88 ff ff d0 c3 b2 95 80 88 ff ff e0 ec 70 94 80 88 ff ff e0 ec 70 94 80 88 ff ff 0f 02 52 80 88 ff ff f0 0f 02 52 80 88 ff ff 00 10 02 52 80 88 RSP: 0018:ffff8880ae8078f0 EFLAGS: 00010246 RAX: 1ffff110117dc68a RBX: ffff888052020ff0 RCX: ffff88805a494480 RDX: ffff888052020fe0 RSI: ffff88805a494480 RDI: ffff88808bee3440 RBP: ffff8880ae807968 R08: ffff88808ebe01c0 R09: ffffed1015d00f0d R10: ffffed1015d00f0c R11: 0000000000000003 R12: dffffc0000000000 R13: ffff888052020fe0 R14: ffff88805a494480 R15: ffff88808bee3440 FS: 00007fa638373700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888052020ff0 CR3: 00000000a55a0000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xmit_one net/core/dev.c:3253 [inline] dev_hard_start_xmit+0xa7/0x980 net/core/dev.c:3273 __dev_queue_xmit+0x2705/0x3010 net/core/dev.c:3843 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876 hsr_xmit net/hsr/hsr_forward.c:237 [inline] hsr_forward_do net/hsr/hsr_forward.c:295 [inline] hsr_forward_skb+0xd2e/0x1c10 net/hsr/hsr_forward.c:373 send_hsr_supervision_frame+0x8c8/0xf30 net/hsr/hsr_device.c:319 hsr_announce+0x12f/0x3b0 net/hsr/hsr_device.c:348 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1682 [inline] __run_timers kernel/time/timer.c:1650 [inline] run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:869 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 48 36 72 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 0a c8 82 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 1c ca 59 fa 65 8b 05 75 7f 12 79 RSP: 0018:ffff88805c787050 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff10e46c9 RBX: 0000000000000286 RCX: 1ffff11011d7c14c RDX: dffffc0000000000 RSI: ffff88808ebe0a68 RDI: 0000000000000286 RBP: ffff88805c787060 R08: ffff88808ebe01c0 R09: ffff88808ebe0a60 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8879fa40 R13: 0000000000000000 R14: ffffffff8879fb00 R15: ffffffff8879fa40 rcu_read_unlock_special+0x679/0xea0 kernel/rcu/tree_plugin.h:587 __rcu_read_unlock+0x161/0x170 kernel/rcu/tree_plugin.h:428 rcu_read_unlock include/linux/rcupdate.h:680 [inline] is_bpf_text_address+0xb6/0x170 kernel/bpf/core.c:549 kernel_text_address+0x73/0xf0 kernel/extable.c:152 __kernel_text_address+0xd/0x40 kernel/extable.c:107 unwind_get_return_address arch/x86/kernel/unwind_frame.c:18 [inline] unwind_get_return_address+0x61/0xa0 arch/x86/kernel/unwind_frame.c:13 __save_stack_trace+0x99/0x100 arch/x86/kernel/stacktrace.c:45 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x700 mm/slab.c:3559 kmem_cache_zalloc include/linux/slab.h:699 [inline] inode_alloc_security security/selinux/hooks.c:255 [inline] selinux_inode_alloc_security+0xb6/0x2a0 security/selinux/hooks.c:3007 security_inode_alloc+0x8a/0xd0 security/security.c:448 inode_init_always+0x56e/0xb40 fs/inode.c:168 alloc_inode+0x81/0x190 fs/inode.c:217 new_inode_pseudo+0x19/0xf0 fs/inode.c:903 new_inode+0x1f/0x40 fs/inode.c:932 proc_pid_make_inode+0x22/0x230 fs/proc/base.c:1735 proc_pident_instantiate+0x82/0x2a0 fs/proc/base.c:2431 proc_pident_lookup+0x1c4/0x230 fs/proc/base.c:2469 proc_tgid_base_lookup+0x2a/0x30 fs/proc/base.c:3026 __lookup_slow+0x279/0x500 fs/namei.c:1671 lookup_slow+0x58/0x80 fs/namei.c:1688 walk_component+0x747/0x2000 fs/namei.c:1810 link_path_walk.part.0+0x980/0x1330 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x1f9/0x4690 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3564 do_sys_open+0x3fe/0x550 fs/open.c:1069 __do_sys_open fs/open.c:1087 [inline] __se_sys_open fs/open.c:1082 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1082 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4131b1 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fa638372bb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00000000004131b1 RDX: 00007fa638372be3 RSI: 0000000000000002 RDI: 00007fa638372bd0 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000013 R10: 0000000000000008 R11: 0000000000000293 R12: 00007fa6383736d4 R13: 00000000004c86c8 R14: 00000000004deff0 R15: 00000000ffffffff Modules linked in: CR2: ffff888052020ff0 ---[ end trace d10d695b4349324a ]--- RIP: 0010:0xffff888052020ff0 Code: 00 00 03 00 00 00 00 00 00 00 10 89 5c 89 80 88 ff ff d0 c3 b2 95 80 88 ff ff e0 ec 70 94 80 88 ff ff e0 ec 70 94 80 88 ff ff 0f 02 52 80 88 ff ff f0 0f 02 52 80 88 ff ff 00 10 02 52 80 88 RSP: 0018:ffff8880ae8078f0 EFLAGS: 00010246 RAX: 1ffff110117dc68a RBX: ffff888052020ff0 RCX: ffff88805a494480 RDX: ffff888052020fe0 RSI: ffff88805a494480 RDI: ffff88808bee3440 RBP: ffff8880ae807968 R08: ffff88808ebe01c0 R09: ffffed1015d00f0d R10: ffffed1015d00f0c R11: 0000000000000003 R12: dffffc0000000000 R13: ffff888052020fe0 R14: ffff88805a494480 R15: ffff88808bee3440 FS: 00007fa638373700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888052020ff0 CR3: 00000000a55a0000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400