Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.75' (ECDSA) to the list of known hosts. 2021/04/24 05:11:44 fuzzer started 2021/04/24 05:11:45 dialing manager at 10.128.0.169:43581 2021/04/24 05:11:45 syscalls: 3560 2021/04/24 05:11:45 code coverage: enabled 2021/04/24 05:11:45 comparison tracing: enabled 2021/04/24 05:11:45 extra coverage: enabled 2021/04/24 05:11:45 setuid sandbox: enabled 2021/04/24 05:11:45 namespace sandbox: enabled 2021/04/24 05:11:45 Android sandbox: /sys/fs/selinux/policy does not exist 2021/04/24 05:11:45 fault injection: enabled 2021/04/24 05:11:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/04/24 05:11:45 net packet injection: enabled 2021/04/24 05:11:45 net device setup: enabled 2021/04/24 05:11:45 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2021/04/24 05:11:45 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/04/24 05:11:45 USB emulation: enabled 2021/04/24 05:11:45 hci packet injection: enabled 2021/04/24 05:11:45 wifi device emulation: enabled 2021/04/24 05:11:45 802.15.4 emulation: enabled 2021/04/24 05:11:45 fetching corpus: 0, signal 0/2000 (executing program) syzkaller login: [ 72.745962][ C1] ================================================================== [ 72.752724][ T8468] BUG: kernel NULL pointer dereference, address: 00000000000000c0 [ 72.754280][ C1] BUG: KASAN: use-after-free in skb_try_coalesce+0x1335/0x1440 [ 72.762077][ T8468] #PF: supervisor read access in kernel mode [ 72.769597][ C1] Write of size 4 at addr ffff88801cba8008 by task ksoftirqd/1/19 [ 72.775550][ T8468] #PF: error_code(0x0000) - not-present page [ 72.783341][ C1] [ 72.783351][ C1] CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 [ 72.789389][ T8468] PGD 0 P4D 0 [ 72.791704][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.801135][ T8468] [ 72.801142][ T8468] Oops: 0000 [#1] PREEMPT SMP KASAN [ 72.804495][ C1] Call Trace: [ 72.814542][ T8468] CPU: 0 PID: 8468 Comm: systemd-sysctl Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 [ 72.816865][ C1] dump_stack+0x141/0x1d7 [ 72.822032][ T8468] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.825401][ C1] ? skb_try_coalesce+0x1335/0x1440 [ 72.835261][ T8468] RIP: 0010:qlist_free_all+0x35/0xc0 [ 72.839568][ C1] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 72.849602][ T8468] Code: f5 48 83 ec 08 48 8b 37 48 85 f6 0f 84 96 00 00 00 49 be 00 00 00 00 00 ea ff ff 49 89 fd 49 bc 00 00 00 00 00 fc ff df eb 2d <48> 63 87 c0 00 00 00 48 c7 c2 a5 00 ba 81 4c 8b 3e 48 29 c6 48 89 [ 72.854776][ C1] ? skb_try_coalesce+0x1335/0x1440 [ 72.860032][ T8468] RSP: 0018:ffffc900016bfb90 EFLAGS: 00010246 [ 72.867026][ C1] ? skb_try_coalesce+0x1335/0x1440 [ 72.886607][ T8468] [ 72.886613][ T8468] RAX: ffffea0007ffff80 RBX: ffff888024239d68 RCX: ffffea0007ffff87 [ 72.891785][ C1] kasan_report.cold+0x7c/0xd8 [ 72.897836][ T8468] RDX: 0000000000000000 RSI: ffff8881ffffea00 RDI: 0000000000000000 [ 72.903032][ C1] ? __sanitizer_cov_trace_cmp8+0x51/0x70 [ 72.905335][ T8468] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000002e [ 72.913375][ C1] ? skb_try_coalesce+0x1335/0x1440 [ 72.918112][ T8468] R10: ffffffff81342fea R11: 000000000000003f R12: dffffc0000000000 [ 72.926065][ C1] skb_try_coalesce+0x1335/0x1440 [ 72.931757][ T8468] R13: ffffc900016bfbc8 R14: ffffea0000000000 R15: ffff8881ffffea00 [ 72.939715][ C1] tcp_try_coalesce+0x393/0x920 [ 72.944879][ T8468] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 72.952828][ C1] ? mark_held_locks+0x9f/0xe0 [ 72.957828][ T8468] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.965776][ C1] ? tcp_urg.part.0+0x2d0/0x2d0 [ 72.970604][ T8468] CR2: 00000000000000c0 CR3: 00000000159ce000 CR4: 00000000001506f0 [ 72.979508][ C1] ? ktime_get+0x38a/0x470 [ 72.984247][ T8468] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.990806][ C1] ? lockdep_hardirqs_on+0x79/0x100 [ 72.995627][ T8468] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.003577][ C1] tcp_queue_rcv+0x8a/0x6e0 [ 73.007966][ T8468] Call Trace: [ 73.007977][ T8468] kasan_quarantine_reduce+0x180/0x200 [ 73.015930][ C1] tcp_rcv_established+0x1756/0x1eb0 [ 73.021107][ T8468] __kasan_slab_alloc+0x8e/0xa0 [ 73.029056][ C1] ? tcp_data_queue+0x4b10/0x4b10 [ 73.033556][ T8468] kmem_cache_alloc+0x219/0x3a0 [ 73.036820][ C1] ? do_raw_spin_lock+0x120/0x2b0 [ 73.042253][ T8468] vm_area_alloc+0x1c/0x110 [ 73.047519][ C1] tcp_v4_do_rcv+0x5d1/0x870 [ 73.052348][ T8468] mmap_region+0x9a4/0x1730 [ 73.057354][ C1] tcp_v4_rcv+0x3298/0x3950 [ 73.062183][ T8468] ? get_unmapped_area+0x2ae/0x3d0 [ 73.067190][ C1] ? tcp_v4_early_demux+0x8f0/0x8f0 [ 73.071664][ T8468] do_mmap+0xcff/0x11d0 [ 73.076227][ C1] ? lock_release+0x720/0x720 [ 73.080808][ T8468] vm_mmap_pgoff+0x1b7/0x290 [ 73.085285][ C1] ip_protocol_deliver_rcu+0xa7/0xa20 [ 73.090369][ T8468] ? randomize_stack_top+0x100/0x100 [ 73.095627][ C1] ip_local_deliver_finish+0x20a/0x370 [ 73.099755][ T8468] ? __fget_files+0x23d/0x3e0 [ 73.104431][ C1] ip_local_deliver+0x1b3/0x200 [ 73.108997][ T8468] ksys_mmap_pgoff+0x4a8/0x620 [ 73.114344][ C1] ip_sublist_rcv_finish+0x9a/0x2c0 [ 73.119602][ T8468] ? mlock_future_check+0x120/0x120 [ 73.125039][ C1] ip_list_rcv_finish.constprop.0+0x51e/0x6e0 [ 73.129689][ T8468] ? __secure_computing+0x104/0x360 [ 73.134529][ C1] ? ip_rcv_finish_core.constprop.0+0x1e80/0x1e80 [ 73.139264][ T8468] do_syscall_64+0x3a/0xb0 [ 73.144436][ C1] ? ip_list_rcv_finish.constprop.0+0x6e0/0x6e0 [ 73.149608][ T8468] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 73.155678][ C1] ? ip_rcv_core+0x867/0xcb0 [ 73.160851][ T8468] RIP: 0033:0x7fd7fd8e030a [ 73.167241][ C1] ip_list_rcv+0x34e/0x490 [ 73.171635][ T8468] Code: 89 f5 41 54 49 89 fc 55 53 74 35 49 63 e8 48 63 da 4d 89 f9 49 89 e8 4d 63 d6 48 89 da 4c 89 ee 4c 89 e7 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 4e 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 1f 00 [ 73.177846][ C1] ? ip_rcv+0xd0/0xd0 [ 73.183710][ T8468] RSP: 002b:00007ffcb8e9f428 EFLAGS: 00000246 [ 73.188286][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 73.192675][ T8468] ORIG_RAX: 0000000000000009 [ 73.192685][ T8468] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fd7fd8e030a [ 73.197066][ C1] ? find_held_lock+0x2d/0x110 [ 73.216918][ T8468] RDX: 0000000000000005 RSI: 000000000039e960 RDI: 0000000000000000 [ 73.220876][ C1] ? ip_rcv+0xd0/0xd0 [ 73.226914][ T8468] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000 [ 73.232867][ C1] __netif_receive_skb_list_core+0x549/0x8e0 [ 73.237513][ T8468] R10: 0000000000000802 R11: 0000000000000246 R12: 0000000000000000 [ 73.245464][ C1] ? process_backlog+0x6c0/0x6c0 [ 73.250221][ T8468] R13: 000000000039e960 R14: 0000000000000802 R15: 0000000000000000 [ 73.258168][ C1] ? ktime_get_with_offset+0x3f2/0x500 [ 73.262131][ T8468] Modules linked in: [ 73.270073][ C1] ? lockdep_hardirqs_on+0x79/0x100 [ 73.276046][ T8468] [ 73.276055][ T8468] CR2: 00000000000000c0 [ 73.284109][ C1] netif_receive_skb_list_internal+0x75e/0xd80 [ 73.289261][ T8468] ---[ end trace a1b9623473ab9cc2 ]--- [ 73.296986][ C1] ? __netif_receive_skb_list_core+0x8e0/0x8e0 [ 73.302443][ T8468] RIP: 0010:qlist_free_all+0x35/0xc0 [ 73.306293][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 73.311479][ T8468] Code: f5 48 83 ec 08 48 8b 37 48 85 f6 0f 84 96 00 00 00 49 be 00 00 00 00 00 ea ff ff 49 89 fd 49 bc 00 00 00 00 00 fc ff df eb 2d <48> 63 87 c0 00 00 00 48 c7 c2 a5 00 ba 81 4c 8b 3e 48 29 c6 48 89 [ 73.313773][ C1] ? detach_buf_split+0x599/0x7b0 [ 73.317901][ T8468] RSP: 0018:ffffc900016bfb90 EFLAGS: 00010246 [ 73.324031][ C1] ? __sanitizer_cov_trace_cmp2+0x22/0x80 [ 73.329490][ T8468] [ 73.335609][ C1] napi_complete_done+0x1f1/0x880 [ 73.340884][ T8468] RAX: ffffea0007ffff80 RBX: ffff888024239d68 RCX: ffffea0007ffff87 [ 73.347088][ C1] virtnet_poll+0xbeb/0x1180 [ 73.366691][ T8468] RDX: 0000000000000000 RSI: ffff8881ffffea00 RDI: 0000000000000000 [ 73.371679][ C1] ? receive_buf+0x6250/0x6250 [ 73.377729][ T8468] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000002e [ 73.383426][ C1] ? finish_task_switch.isra.0+0x15d/0x810 [ 73.385738][ T8468] R10: ffffffff81342fea R11: 000000000000003f R12: dffffc0000000000 [ 73.390734][ C1] ? lock_downgrade+0x6e0/0x6e0 [ 73.398722][ T8468] R13: ffffc900016bfbc8 R14: ffffea0000000000 R15: ffff8881ffffea00 [ 73.403274][ C1] __napi_poll+0xaf/0x440 [ 73.411235][ T8468] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 73.415961][ C1] net_rx_action+0x801/0xb40 [ 73.423926][ T8468] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.429693][ C1] ? napi_threaded_poll+0x5b0/0x5b0 [ 73.441832][ T8468] CR2: 00000000000000c0 CR3: 00000000159ce000 CR4: 00000000001506f0 [ 73.446644][ C1] ? sched_clock_cpu+0x18/0x1f0 [ 73.454603][ T8468] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.458897][ C1] __do_softirq+0x29b/0x9fe [ 73.467896][ T8468] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.472463][ C1] ? __irq_exit_rcu+0x200/0x200 [ 73.479130][ T8468] Kernel panic - not syncing: Fatal exception [ 73.484287][ C1] run_ksoftirqd+0x2d/0x60 [ 73.532822][ C1] smpboot_thread_fn+0x655/0x9e0 [ 73.537765][ C1] ? __smpboot_create_thread.part.0+0x370/0x370 [ 73.544003][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 73.550242][ C1] ? __kthread_parkme+0x13f/0x1e0 [ 73.555275][ C1] ? __smpboot_create_thread.part.0+0x370/0x370 [ 73.561510][ C1] kthread+0x3b1/0x4a0 [ 73.565836][ C1] ? __kthread_bind_mask+0xc0/0xc0 [ 73.570937][ C1] ret_from_fork+0x1f/0x30 [ 73.575356][ C1] [ 73.577668][ C1] Allocated by task 6452: [ 73.581975][ C1] kasan_save_stack+0x1b/0x40 [ 73.586652][ C1] __kasan_kmalloc+0x9b/0xd0 [ 73.591241][ C1] tomoyo_realpath_from_path+0xc3/0x620 [ 73.596777][ C1] tomoyo_check_open_permission+0x272/0x380 [ 73.602659][ C1] tomoyo_file_open+0xa3/0xd0 [ 73.607353][ C1] security_file_open+0x52/0x4f0 [ 73.612286][ C1] do_dentry_open+0x358/0x11b0 [ 73.617043][ C1] path_openat+0x1c09/0x27d0 [ 73.621627][ C1] do_filp_open+0x190/0x3d0 [ 73.626123][ C1] do_sys_openat2+0x16d/0x420 [ 73.630802][ C1] __x64_sys_open+0x119/0x1c0 [ 73.635469][ C1] do_syscall_64+0x3a/0xb0 [ 73.639893][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 73.645794][ C1] [ 73.648106][ C1] The buggy address belongs to the object at ffff88801cba8000 [ 73.648106][ C1] which belongs to the cache kmalloc-4k of size 4096 [ 73.662238][ C1] The buggy address is located 8 bytes inside of [ 73.662238][ C1] 4096-byte region [ffff88801cba8000, ffff88801cba9000) [ 73.682542][ C1] The buggy address belongs to the page: [ 73.688242][ C1] page:ffffea000072ea00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801cba8000 pfn:0x1cba8 [ 73.699811][ C1] head:ffffea000072ea00 order:3 compound_mapcount:0 compound_pincount:0 [ 73.708130][ C1] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) [ 73.716111][ C1] raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888011042140 [ 73.724686][ C1] raw: ffff88801cba8000 0000000080040002 00000001ffffffff 0000000000000000 [ 73.733253][ C1] page dumped because: kasan: bad access detected [ 73.739644][ C1] [ 73.741952][ C1] Memory state around the buggy address: [ 73.747563][ C1] ffff88801cba7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.755625][ C1] ffff88801cba7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.763672][ C1] >ffff88801cba8000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.771714][ C1] ^ [ 73.776025][ C1] ffff88801cba8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.784072][ C1] ffff88801cba8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.792116][ C1] ================================================================== [ 73.800765][ T8468] Kernel Offset: disabled [ 73.805086][ T8468] Rebooting in 86400 seconds..