[ OK ] Started Daily apt download activities. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started Regular background program processing daemon. Starting Permit User Sessions... [ OK ] Started System Logging Service. [ OK ] Found device /dev/ttyS0. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. executing program [ 84.109071][ T37] audit: type=1400 audit(1622945233.582:8): avc: denied { execmem } for pid=8416 comm="syz-executor813" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 89.130500][ T8417] general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN [ 89.143575][ T8417] KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf] [ 89.152021][ T8417] CPU: 1 PID: 8417 Comm: syz-executor813 Not tainted 5.13.0-rc4-syzkaller #0 [ 89.161137][ T8417] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.171554][ T8417] RIP: 0010:kcm_sendmsg+0xdd7/0x2240 [ 89.176894][ T8417] Code: fb 05 0f 84 25 0b 00 00 e8 56 52 48 f9 48 8b 44 24 18 4c 8d a8 c8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 11 00 00 48 8b 44 24 18 48 8d a8 c4 00 00 00 [ 89.199258][ T8417] RSP: 0018:ffffc90000fbfa70 EFLAGS: 00010202 [ 89.205644][ T8417] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 89.213922][ T8417] RDX: 0000000000000019 RSI: ffffffff882bbf0a RDI: 0000000000000003 [ 89.223174][ T8417] RBP: ffff888035a8596a R08: 0000000000000000 R09: 0000000000000000 [ 89.231426][ T8417] R10: ffffffff882bc26b R11: 0000000000000000 R12: 00000000fffffe00 [ 89.239949][ T8417] R13: 00000000000000c8 R14: ffff88803abaaa80 R15: ffff888035a853c0 [ 89.247931][ T8417] FS: 00000000013f0300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 89.256877][ T8417] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.263585][ T8417] CR2: 00007f6150acfab4 CR3: 00000000233cc000 CR4: 00000000001506e0 [ 89.272471][ T8417] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 89.280472][ T8417] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 89.288812][ T8417] Call Trace: [ 89.292111][ T8417] ? __sanitizer_cov_trace_cmp2+0x22/0x80 [ 89.298225][ T8417] ? sock_has_perm+0x1ee/0x280 [ 89.303014][ T8417] ? selinux_socket_post_create+0x7d0/0x7d0 [ 89.308932][ T8417] ? tomoyo_socket_sendmsg_permission+0x130/0x3a0 [ 89.315851][ T8417] ? kcm_tx_work+0x160/0x160 [ 89.320502][ T8417] ? mark_lock+0xef/0x17b0 [ 89.325128][ T8417] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 89.332019][ T8417] ? kcm_tx_work+0x160/0x160 [ 89.336918][ T8417] sock_sendmsg+0xcf/0x120 [ 89.341539][ T8417] sock_write_iter+0x289/0x3c0 [ 89.346421][ T8417] ? sock_sendmsg+0x120/0x120 [ 89.351133][ T8417] ? file_has_perm+0x25a/0x340 [ 89.355917][ T8417] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 89.362373][ T8417] new_sync_write+0x426/0x650 [ 89.367078][ T8417] ? new_sync_read+0x6e0/0x6e0 [ 89.371866][ T8417] ? selinux_file_permission+0x92/0x520 [ 89.377542][ T8417] vfs_write+0x796/0xa30 [ 89.381839][ T8417] ksys_write+0x1ee/0x250 [ 89.386307][ T8417] ? __ia32_sys_read+0xb0/0xb0 [ 89.391096][ T8417] ? syscall_enter_from_user_mode+0x27/0x70 [ 89.397145][ T8417] do_syscall_64+0x3a/0xb0 [ 89.401591][ T8417] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 89.407541][ T8417] RIP: 0033:0x43fc29 [ 89.411467][ T8417] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 89.431622][ T8417] RSP: 002b:00007ffe42684be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 89.440079][ T8417] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043fc29 [ 89.448344][ T8417] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 89.456521][ T8417] RBP: 0000000000000000 R08: 00007ffe42684d88 R09: 00007ffe42684d88 [ 89.464510][ T8417] R10: 00007ffe42684d88 R11: 0000000000000246 R12: 00000000004034b0 [ 89.472502][ T8417] R13: 431bde82d7b634db R14: 00000000004ad018 R15: 0000000000400488 [ 89.480672][ T8417] Modules linked in: [ 89.486457][ T8417] ---[ end trace 89bff05d4272a26f ]--- [ 89.491948][ T8417] RIP: 0010:kcm_sendmsg+0xdd7/0x2240 [ 89.497851][ T8417] Code: fb 05 0f 84 25 0b 00 00 e8 56 52 48 f9 48 8b 44 24 18 4c 8d a8 c8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 11 00 00 48 8b 44 24 18 48 8d a8 c4 00 00 00 [ 89.519934][ T8417] RSP: 0018:ffffc90000fbfa70 EFLAGS: 00010202 [ 89.526270][ T8417] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 89.534749][ T8417] RDX: 0000000000000019 RSI: ffffffff882bbf0a RDI: 0000000000000003 [ 89.543208][ T8417] RBP: ffff888035a8596a R08: 0000000000000000 R09: 0000000000000000 [ 89.551418][ T8417] R10: ffffffff882bc26b R11: 0000000000000000 R12: 00000000fffffe00 [ 89.559621][ T8417] R13: 00000000000000c8 R14: ffff88803abaaa80 R15: ffff888035a853c0 [ 89.567764][ T8417] FS: 00000000013f0300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 89.577265][ T8417] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.583930][ T8417] CR2: 00000000013f02c0 CR3: 00000000233cc000 CR4: 00000000001506f0 [ 89.591916][ T8417] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 89.600112][ T8417] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 89.608331][ T8417] Kernel panic - not syncing: Fatal exception [ 89.615318][ T8417] Kernel Offset: disabled [ 89.619648][ T8417] Rebooting in 86400 seconds..