syzkaller login: [ 11.664128][ T22] audit: type=1400 audit(1580729589.597:12): avc: denied { map } for pid=1863 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. executing program [ 17.725447][ T22] audit: type=1400 audit(1580729595.657:13): avc: denied { map } for pid=1875 comm="syz-executor214" path="/root/syz-executor214812361" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 17.741883][ T22] audit: type=1400 audit(1580729595.677:14): avc: denied { prog_load } for pid=1876 comm="syz-executor214" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 17.749908][ T22] audit: type=1400 audit(1580729595.687:15): avc: denied { prog_run } for pid=1876 comm="syz-executor214" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 17.750101][ T1876] BUG: unable to handle page fault for address: ffffed101a08f5ff [ 17.780880][ T1876] #PF: supervisor read access in kernel mode [ 17.786950][ T1876] #PF: error_code(0x0000) - not-present page [ 17.792906][ T1876] PGD 21fff7067 P4D 21fff7067 PUD 21fff6067 PMD 0 [ 17.799390][ T1876] Oops: 0000 [#1] PREEMPT SMP KASAN [ 17.804606][ T1876] CPU: 1 PID: 1876 Comm: syz-executor214 Not tainted 5.4.17-syzkaller-01370-g83003512ab3b #0 [ 17.814750][ T1876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 17.824803][ T1876] RIP: 0010:do_xdp_generic+0x603/0x1500 [ 17.830324][ T1876] Code: 00 00 00 00 fc ff df 42 80 3c 30 00 74 05 e8 f4 95 96 fe 4c 89 a4 24 d8 00 00 00 4c 89 ac 24 18 01 00 00 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 ff e8 2e 95 96 fe 49 8b 37 83 e6 01 31 [ 17.849908][ T1876] RSP: 0018:ffff8881d04b7680 EFLAGS: 00010a07 [ 17.855998][ T1876] RAX: 1ffff1101a08f5ff RBX: ffff8881d04b7788 RCX: 1ffff1103a096ef1 [ 17.864001][ T1876] RDX: ffff8881d2e556b4 RSI: 0000000000000000 RDI: ffff8881d04b7798 [ 17.872019][ T1876] RBP: ffff8881d04b7830 R08: ffffffff82da44fb R09: ffffed103a08d65d [ 17.880026][ T1876] R10: ffffed103a08d65d R11: 0000000000000000 R12: ffff8880d046b13e [ 17.887983][ T1876] R13: ffff8881d046b000 R14: dffffc0000000000 R15: ffff8880d047afff [ 17.895948][ T1876] FS: 0000000001f47880(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 [ 17.904958][ T1876] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 17.911524][ T1876] CR2: ffffed101a08f5ff CR3: 00000001d5c24003 CR4: 00000000001606e0 [ 17.919535][ T1876] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 17.927494][ T1876] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 17.935885][ T1876] Call Trace: [ 17.939195][ T1876] ? __kasan_check_write+0x14/0x20 [ 17.944304][ T1876] ? _copy_from_iter+0x886/0xaa0 [ 17.949219][ T1876] ? generic_xdp_tx+0x4f0/0x4f0 [ 17.954209][ T1876] ? tun_get_user+0x3d10/0x3d10 [ 17.959185][ T1876] tun_get_user+0x2498/0x3d10 [ 17.963870][ T1876] ? tun_do_read+0x1f10/0x1f10 [ 17.968620][ T1876] ? netlink_detachskb+0x60/0x60 [ 17.973550][ T1876] ? put_pid+0x82/0xe0 [ 17.978313][ T1876] ? netlink_sendmsg+0xa28/0xd40 [ 17.983230][ T1876] ? __rcu_read_lock+0x50/0x50 [ 17.988054][ T1876] ? netlink_getsockopt+0x900/0x900 [ 17.993240][ T1876] tun_chr_write_iter+0x134/0x1c0 [ 17.998256][ T1876] do_iter_readv_writev+0x5fa/0x890 [ 18.003489][ T1876] ? vfs_dedupe_file_range+0xa00/0xa00 [ 18.008993][ T1876] ? security_file_permission+0x157/0x350 [ 18.014893][ T1876] ? rw_verify_area+0x1c2/0x360 [ 18.019777][ T1876] do_iter_write+0x180/0x590 [ 18.024444][ T1876] do_writev+0x2cd/0x560 [ 18.028673][ T1876] ? do_readv+0x400/0x400 [ 18.032990][ T1876] ? __up_read+0x6f/0x1b0 [ 18.037300][ T1876] ? __kasan_check_write+0x14/0x20 [ 18.042396][ T1876] ? __fpregs_load_activate+0x2fc/0x3b0 [ 18.047933][ T1876] ? switch_fpu_return+0x10/0x10 [ 18.052870][ T1876] ? __kasan_check_read+0x11/0x20 [ 18.057885][ T1876] __x64_sys_writev+0x7d/0x90 [ 18.062635][ T1876] do_syscall_64+0xc0/0x100 [ 18.067124][ T1876] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 18.073005][ T1876] RIP: 0033:0x441660 [ 18.076878][ T1876] Code: 05 48 3d 01 f0 ff ff 0f 83 fd 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d b1 99 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 0e fc ff c3 48 83 ec 08 e8 7a 2b 00 00 [ 18.097170][ T1876] RSP: 002b:00007ffc0a790428 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 18.105577][ T1876] RAX: ffffffffffffffda RBX: 00007ffc0a790440 RCX: 0000000000441660 [ 18.113560][ T1876] RDX: 0000000000000001 RSI: 00007ffc0a790470 RDI: 00000000000000f0 [ 18.121566][ T1876] RBP: 0000000000000003 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 18.129525][ T1876] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000000 [ 18.137535][ T1876] R13: 0000000000402a50 R14: 0000000000000000 R15: 0000000000000000 [ 18.145491][ T1876] Modules linked in: [ 18.149364][ T1876] CR2: ffffed101a08f5ff [ 18.153492][ T1876] ---[ end trace 06c5ba7c84844811 ]--- [ 18.158934][ T1876] RIP: 0010:do_xdp_generic+0x603/0x1500 [ 18.164469][ T1876] Code: 00 00 00 00 fc ff df 42 80 3c 30 00 74 05 e8 f4 95 96 fe 4c 89 a4 24 d8 00 00 00 4c 89 ac 24 18 01 00 00 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 ff e8 2e 95 96 fe 49 8b 37 83 e6 01 31 [ 18.184057][ T1876] RSP: 0018:ffff8881d04b7680 EFLAGS: 00010a07 [ 18.190111][ T1876] RAX: 1ffff1101a08f5ff RBX: ffff8881d04b7788 RCX: 1ffff1103a096ef1 [ 18.198067][ T1876] RDX: ffff8881d2e556b4 RSI: 0000000000000000 RDI: ffff8881d04b7798 [ 18.206024][ T1876] RBP: ffff8881d04b7830 R08: ffffffff82da44fb R09: ffffed103a08d65d [ 18.214054][ T1876] R10: ffffed103a08d65d R11: 0000000000000000 R12: ffff8880d046b13e [ 18.222009][ T1876] R13: ffff8881d046b000 R14: dffffc0000000000 R15: ffff8880d047afff [ 18.229996][ T1876] FS: 0000000001f47880(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 [ 18.238914][ T1876] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.245483][ T1876] CR2: ffffed101a08f5ff CR3: 00000001d5c24003 CR4: 00000000001606e0 [ 18.253482][ T1876] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.261442][ T1876] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.269414][ T1876] Kernel panic - not syncing: Fatal exception in interrupt [ 18.277558][ T1876] Kernel Offset: disabled [ 18.281877][ T1876] Rebooting in 86400 seconds..