Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.223059][ T8461] [U]  [ 57.230792][ T8461] ------------[ cut here ]------------ [ 57.249546][ T8461] WARNING: CPU: 1 PID: 8461 at lib/iov_iter.c:1090 iov_iter_revert+0x2e3/0x8e0 [ 57.296068][ T8461] Modules linked in: [ 57.300376][ T8461] CPU: 1 PID: 8461 Comm: syz-executor778 Not tainted 5.11.0-rc7-syzkaller #0 [ 57.335421][ T8461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.346944][ T8461] RIP: 0010:iov_iter_revert+0x2e3/0x8e0 [ 57.352530][ T8461] 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 [ 57.375373][ T8461] RSP: 0018:ffffc9000168fc30 EFLAGS: 00010293 [ 57.382416][ T8461] RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000000 [ 57.408752][ T8461] RDX: ffff88801b6c1bc0 RSI: ffffffff83bdef03 RDI: 0000000000000003 [ 57.417502][ T8461] RBP: ffffc9000168fd68 R08: 000000007ffff000 R09: ffffffff8f86683f [ 57.429586][ T8461] R10: ffffffff83bdec5e R11: 0000000000000000 R12: 0000000000000001 [ 57.480572][ T8461] R13: 0000000000000000 R14: ffffc9000168fd68 R15: ffff88801b6c1bc0 [ 57.510315][ T8461] FS: 00000000016f5300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 57.543394][ T8461] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.555922][ T8461] CR2: 00007f5d4c03d0d8 CR3: 0000000013adc000 CR4: 0000000000350ef0 [ 57.565260][ T8461] Call Trace: [ 57.569889][ T8461] file_tty_write.constprop.0+0x55f/0x8f0 [ 57.579898][ T8461] ? gsmld_close+0x260/0x260 [ 57.584589][ T8461] new_sync_write+0x426/0x650 [ 57.592831][ T8461] ? new_sync_read+0x6e0/0x6e0 [ 57.597950][ T8461] ? apparmor_file_permission+0x26e/0x4e0 [ 57.609852][ T8461] ? build_open_flags+0x680/0x680 [ 57.615399][ T8461] vfs_write+0x791/0xa30 [ 57.620129][ T8461] ksys_write+0x12d/0x250 [ 57.624480][ T8461] ? __ia32_sys_read+0xb0/0xb0 [ 57.629830][ T8461] ? syscall_enter_from_user_mode+0x1d/0x50 [ 57.635772][ T8461] do_syscall_64+0x2d/0x70 [ 57.640532][ T8461] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.646507][ T8461] RIP: 0033:0x43ee99 [ 57.650507][ T8461] 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 [ 57.670209][ T8461] RSP: 002b:00007fffc3cb0628 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 57.678914][ T8461] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee99 [ 57.686985][ T8461] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 57.694972][ T8461] RBP: 0000000000402e80 R08: 0000000000400488 R09: 0000000000400488 [ 57.703037][ T8461] R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000402f10 [ 57.711137][ T8461] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 57.719222][ T8461] Kernel panic - not syncing: panic_on_warn set ... [ 57.726072][ T8461] CPU: 1 PID: 8461 Comm: syz-executor778 Not tainted 5.11.0-rc7-syzkaller #0 [ 57.734816][ T8461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.744954][ T8461] Call Trace: [ 57.748237][ T8461] dump_stack+0x107/0x163 [ 57.752569][ T8461] panic+0x306/0x73d [ 57.756461][ T8461] ? __warn_printk+0xf3/0xf3 [ 57.761051][ T8461] ? __warn.cold+0x1a/0x44 [ 57.765466][ T8461] ? iov_iter_revert+0x2e3/0x8e0 [ 57.770408][ T8461] __warn.cold+0x35/0x44 [ 57.774678][ T8461] ? iov_iter_revert+0x2e3/0x8e0 [ 57.779634][ T8461] report_bug+0x1bd/0x210 [ 57.783969][ T8461] handle_bug+0x3c/0x60 [ 57.788121][ T8461] exc_invalid_op+0x14/0x40 [ 57.792641][ T8461] asm_exc_invalid_op+0x12/0x20 [ 57.797506][ T8461] RIP: 0010:iov_iter_revert+0x2e3/0x8e0 [ 57.803159][ T8461] 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 [ 57.822784][ T8461] RSP: 0018:ffffc9000168fc30 EFLAGS: 00010293 [ 57.828880][ T8461] RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000000 [ 57.836847][ T8461] RDX: ffff88801b6c1bc0 RSI: ffffffff83bdef03 RDI: 0000000000000003 [ 57.844827][ T8461] RBP: ffffc9000168fd68 R08: 000000007ffff000 R09: ffffffff8f86683f [ 57.852932][ T8461] R10: ffffffff83bdec5e R11: 0000000000000000 R12: 0000000000000001 [ 57.860895][ T8461] R13: 0000000000000000 R14: ffffc9000168fd68 R15: ffff88801b6c1bc0 [ 57.868862][ T8461] ? iov_iter_revert+0x3e/0x8e0 [ 57.873708][ T8461] ? iov_iter_revert+0x2e3/0x8e0 [ 57.878641][ T8461] file_tty_write.constprop.0+0x55f/0x8f0 [ 57.884447][ T8461] ? gsmld_close+0x260/0x260 [ 57.889058][ T8461] new_sync_write+0x426/0x650 [ 57.893733][ T8461] ? new_sync_read+0x6e0/0x6e0 [ 57.898503][ T8461] ? apparmor_file_permission+0x26e/0x4e0 [ 57.904229][ T8461] ? build_open_flags+0x680/0x680 [ 57.909248][ T8461] vfs_write+0x791/0xa30 [ 57.913504][ T8461] ksys_write+0x12d/0x250 [ 57.917849][ T8461] ? __ia32_sys_read+0xb0/0xb0 [ 57.922627][ T8461] ? syscall_enter_from_user_mode+0x1d/0x50 [ 57.928528][ T8461] do_syscall_64+0x2d/0x70 [ 57.932961][ T8461] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.938958][ T8461] RIP: 0033:0x43ee99 [ 57.942857][ T8461] 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 [ 57.962459][ T8461] RSP: 002b:00007fffc3cb0628 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 57.970869][ T8461] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee99 [ 57.978828][ T8461] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 57.986788][ T8461] RBP: 0000000000402e80 R08: 0000000000400488 R09: 0000000000400488 [ 57.994749][ T8461] R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000402f10 [ 58.002728][ T8461] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 58.014671][ T8461] Kernel Offset: disabled [ 58.019101][ T8461] Rebooting in 86400 seconds..