[ 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... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.202' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 75.116893][ T8483] [U]  [ 75.120215][ T8483] ------------[ cut here ]------------ [ 75.130322][ T8483] WARNING: CPU: 1 PID: 8483 at lib/iov_iter.c:1090 iov_iter_revert+0x2e3/0x8e0 [ 75.161749][ T8483] Modules linked in: [ 75.168603][ T8483] CPU: 1 PID: 8483 Comm: syz-executor231 Not tainted 5.11.0-rc7-syzkaller #0 [ 75.188860][ T8483] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.230024][ T8483] RIP: 0010:iov_iter_revert+0x2e3/0x8e0 [ 75.236771][ T8483] Code: 05 00 00 45 8b 74 24 08 48 89 de 4c 89 6d 20 49 83 c5 01 4c 89 f7 e8 bc eb b4 fd 49 39 de 72 ba e9 2c ff ff ff e8 9d e5 b4 fd <0f> 0b e9 30 ff ff ff e8 91 e5 b4 fd 48 8d 7d 18 48 b8 00 00 00 00 [ 75.294352][ T8483] RSP: 0018:ffffc90001a0fc30 EFLAGS: 00010293 [ 75.392164][ T8483] RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000000 [ 75.423679][ T8483] RDX: ffff88801d668000 RSI: ffffffff83bdef03 RDI: 0000000000000003 [ 75.432027][ T8483] RBP: ffffc90001a0fd68 R08: 000000007ffff000 R09: ffffffff8f86683f [ 75.548496][ T8483] R10: ffffffff83bdec5e R11: 0000000000000000 R12: 0000000000000001 [ 75.559369][ T8483] R13: 0000000000000000 R14: ffffc90001a0fd68 R15: ffff88801d668000 [ 75.603629][ T8483] FS: 0000000001ca3300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 75.615930][ T8483] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.622609][ T8483] CR2: 0000563252500fa8 CR3: 0000000014a46000 CR4: 00000000001506e0 [ 75.631405][ T8483] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.640426][ T8483] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.648767][ T8483] Call Trace: [ 75.652122][ T8483] file_tty_write.constprop.0+0x55f/0x8f0 [ 75.658724][ T8483] ? gsmld_close+0x260/0x260 [ 75.663377][ T8483] new_sync_write+0x426/0x650 [ 75.668731][ T8483] ? new_sync_read+0x6e0/0x6e0 [ 75.674338][ T8483] ? apparmor_file_permission+0x26e/0x4e0 [ 75.680153][ T8483] ? build_open_flags+0x680/0x680 [ 75.685377][ T8483] vfs_write+0x791/0xa30 [ 75.689669][ T8483] ksys_write+0x12d/0x250 [ 75.694153][ T8483] ? __ia32_sys_read+0xb0/0xb0 [ 75.699028][ T8483] ? syscall_enter_from_user_mode+0x1d/0x50 [ 75.705083][ T8483] do_syscall_64+0x2d/0x70 [ 75.709555][ T8483] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 75.715732][ T8483] RIP: 0033:0x43ee99 [ 75.719835][ T8483] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 [ 75.739921][ T8483] RSP: 002b:00007ffd41ab0238 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 75.748515][ T8483] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee99 [ 75.756687][ T8483] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 75.764806][ T8483] RBP: 0000000000402e80 R08: 0000000000400488 R09: 0000000000400488 [ 75.772910][ T8483] R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000402f10 [ 75.781081][ T8483] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 75.789220][ T8483] Kernel panic - not syncing: panic_on_warn set ... [ 75.795826][ T8483] CPU: 1 PID: 8483 Comm: syz-executor231 Not tainted 5.11.0-rc7-syzkaller #0 [ 75.804701][ T8483] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.814869][ T8483] Call Trace: [ 75.818171][ T8483] dump_stack+0x107/0x163 [ 75.822529][ T8483] panic+0x306/0x73d [ 75.826456][ T8483] ? __warn_printk+0xf3/0xf3 [ 75.831102][ T8483] ? __warn.cold+0x1a/0x44 [ 75.835548][ T8483] ? iov_iter_revert+0x2e3/0x8e0 [ 75.840619][ T8483] __warn.cold+0x35/0x44 [ 75.844915][ T8483] ? iov_iter_revert+0x2e3/0x8e0 [ 75.849898][ T8483] report_bug+0x1bd/0x210 [ 75.854261][ T8483] handle_bug+0x3c/0x60 [ 75.858441][ T8483] exc_invalid_op+0x14/0x40 [ 75.862951][ T8483] asm_exc_invalid_op+0x12/0x20 [ 75.867814][ T8483] RIP: 0010:iov_iter_revert+0x2e3/0x8e0 [ 75.878223][ T8483] Code: 05 00 00 45 8b 74 24 08 48 89 de 4c 89 6d 20 49 83 c5 01 4c 89 f7 e8 bc eb b4 fd 49 39 de 72 ba e9 2c ff ff ff e8 9d e5 b4 fd <0f> 0b e9 30 ff ff ff e8 91 e5 b4 fd 48 8d 7d 18 48 b8 00 00 00 00 [ 75.898006][ T8483] RSP: 0018:ffffc90001a0fc30 EFLAGS: 00010293 [ 75.904098][ T8483] RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000000 [ 75.912263][ T8483] RDX: ffff88801d668000 RSI: ffffffff83bdef03 RDI: 0000000000000003 [ 75.920275][ T8483] RBP: ffffc90001a0fd68 R08: 000000007ffff000 R09: ffffffff8f86683f [ 75.928395][ T8483] R10: ffffffff83bdec5e R11: 0000000000000000 R12: 0000000000000001 [ 75.936531][ T8483] R13: 0000000000000000 R14: ffffc90001a0fd68 R15: ffff88801d668000 [ 75.944520][ T8483] ? iov_iter_revert+0x3e/0x8e0 [ 75.949579][ T8483] ? iov_iter_revert+0x2e3/0x8e0 [ 75.955496][ T8483] file_tty_write.constprop.0+0x55f/0x8f0 [ 75.961734][ T8483] ? gsmld_close+0x260/0x260 [ 75.966763][ T8483] new_sync_write+0x426/0x650 [ 75.973378][ T8483] ? new_sync_read+0x6e0/0x6e0 [ 75.978347][ T8483] ? apparmor_file_permission+0x26e/0x4e0 [ 75.984734][ T8483] ? build_open_flags+0x680/0x680 [ 75.989796][ T8483] vfs_write+0x791/0xa30 [ 75.994528][ T8483] ksys_write+0x12d/0x250 [ 75.999000][ T8483] ? __ia32_sys_read+0xb0/0xb0 [ 76.003813][ T8483] ? syscall_enter_from_user_mode+0x1d/0x50 [ 76.009869][ T8483] do_syscall_64+0x2d/0x70 [ 76.014308][ T8483] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 76.020395][ T8483] RIP: 0033:0x43ee99 [ 76.024324][ T8483] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 [ 76.044139][ T8483] RSP: 002b:00007ffd41ab0238 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 76.059287][ T8483] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee99 [ 76.067525][ T8483] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 76.075786][ T8483] RBP: 0000000000402e80 R08: 0000000000400488 R09: 0000000000400488 [ 76.084653][ T8483] R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000402f10 [ 76.092630][ T8483] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 76.101236][ T8483] Kernel Offset: disabled [ 76.106043][ T8483] Rebooting in 86400 seconds..