Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.152' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.192332][ T6536] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN [ 73.204068][ T6536] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] [ 73.212479][ T6536] CPU: 0 PID: 6536 Comm: syz-executor955 Not tainted 5.16.0-rc3-syzkaller #0 [ 73.221502][ T6536] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.231554][ T6536] RIP: 0010:__lock_acquire+0xd7d/0x54a0 [ 73.237123][ T6536] Code: 0f 0e 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 99 bc 0f 0e e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 f3 2f 00 00 48 81 3b 20 65 17 8f 0f 84 52 f3 ff [ 73.256740][ T6536] RSP: 0018:ffffc90002a0f818 EFLAGS: 00010006 [ 73.262806][ T6536] RAX: dffffc0000000000 RBX: 0000000000000018 RCX: 0000000000000000 [ 73.270879][ T6536] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 [ 73.278839][ T6536] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 [ 73.286798][ T6536] R10: 0000000000000000 R11: 000000000000000a R12: 0000000000000000 [ 73.294763][ T6536] R13: ffff888023070000 R14: 0000000000000000 R15: 0000000000000001 [ 73.302736][ T6536] FS: 00007fb88dd59700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 73.311668][ T6536] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.318250][ T6536] CR2: 00007fb88dd37268 CR3: 000000007e9b4000 CR4: 00000000003506f0 [ 73.326240][ T6536] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.334209][ T6536] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.342175][ T6536] Call Trace: [ 73.345445][ T6536] [ 73.348367][ T6536] ? __lock_acquire+0x162f/0x54a0 [ 73.353395][ T6536] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 73.359371][ T6536] ? mark_lock+0xef/0x17b0 [ 73.363793][ T6536] lock_acquire+0x1ab/0x510 [ 73.368292][ T6536] ? finish_wait+0xc0/0x270 [ 73.372789][ T6536] ? lock_release+0x720/0x720 [ 73.377462][ T6536] ? find_held_lock+0x2d/0x110 [ 73.382225][ T6536] ? inet_csk_accept+0x3e1/0x9d0 [ 73.387176][ T6536] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 73.392568][ T6536] _raw_spin_lock_irqsave+0x39/0x50 [ 73.397770][ T6536] ? finish_wait+0xc0/0x270 [ 73.402275][ T6536] finish_wait+0xc0/0x270 [ 73.406607][ T6536] inet_csk_accept+0x7de/0x9d0 [ 73.411378][ T6536] ? reqsk_put+0x2f0/0x2f0 [ 73.415907][ T6536] ? release_sock+0x1b/0x1b0 [ 73.420497][ T6536] ? finish_wait+0x270/0x270 [ 73.425085][ T6536] mptcp_accept+0xe5/0x500 [ 73.429500][ T6536] inet_accept+0xe4/0x7b0 [ 73.433822][ T6536] ? rwlock_bug.part.0+0x90/0x90 [ 73.438756][ T6536] ? ipv4_mib_init_net+0x560/0x560 [ 73.443861][ T6536] ? __local_bh_enable_ip+0xa0/0x120 [ 73.449147][ T6536] mptcp_stream_accept+0x2e7/0x10e0 [ 73.454348][ T6536] ? do_raw_spin_unlock+0x171/0x230 [ 73.459541][ T6536] ? mptcp_subflow_delegate.constprop.0+0x440/0x440 [ 73.466130][ T6536] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.472373][ T6536] do_accept+0x382/0x510 [ 73.476615][ T6536] ? __ia32_sys_listen+0x70/0x70 [ 73.481566][ T6536] ? rwlock_bug.part.0+0x90/0x90 [ 73.486503][ T6536] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.492743][ T6536] ? _find_next_bit+0x1e3/0x260 [ 73.497588][ T6536] ? do_raw_spin_unlock+0x171/0x230 [ 73.502785][ T6536] ? _raw_spin_unlock+0x24/0x40 [ 73.507632][ T6536] ? alloc_fd+0x2f0/0x670 [ 73.511962][ T6536] __sys_accept4_file+0x7e/0xe0 [ 73.516813][ T6536] __sys_accept4+0xb0/0x100 [ 73.521313][ T6536] __x64_sys_accept+0x71/0xb0 [ 73.526507][ T6536] ? syscall_enter_from_user_mode+0x21/0x70 [ 73.532392][ T6536] do_syscall_64+0x35/0xb0 [ 73.536808][ T6536] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 73.542697][ T6536] RIP: 0033:0x7fb88dda78e9 [ 73.547101][ T6536] 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 b8 ff ff ff f7 d8 64 89 01 48 [ 73.566701][ T6536] RSP: 002b:00007fb88dd59308 EFLAGS: 00000246 ORIG_RAX: 000000000000002b [ 73.575104][ T6536] RAX: ffffffffffffffda RBX: 00007fb88de2f408 RCX: 00007fb88dda78e9 [ 73.583087][ T6536] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 73.591049][ T6536] RBP: 00007fb88de2f400 R08: 0000000000000000 R09: 0000000000000000 [ 73.599006][ T6536] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb88de2f40c [ 73.606981][ T6536] R13: 00007fb88ddfd004 R14: 6d705f706374706d R15: 0000000000022000 [ 73.614948][ T6536] [ 73.617968][ T6536] Modules linked in: [ 73.621853][ T6536] ---[ end trace b6516e7839a4cc43 ]--- [ 73.627295][ T6536] RIP: 0010:__lock_acquire+0xd7d/0x54a0 [ 73.632852][ T6536] Code: 0f 0e 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 99 bc 0f 0e e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 f3 2f 00 00 48 81 3b 20 65 17 8f 0f 84 52 f3 ff [ 73.652454][ T6536] RSP: 0018:ffffc90002a0f818 EFLAGS: 00010006 [ 73.658529][ T6536] RAX: dffffc0000000000 RBX: 0000000000000018 RCX: 0000000000000000 [ 73.666488][ T6536] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 [ 73.674449][ T6536] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 [ 73.682408][ T6536] R10: 0000000000000000 R11: 000000000000000a R12: 0000000000000000 [ 73.690372][ T6536] R13: ffff888023070000 R14: 0000000000000000 R15: 0000000000000001 [ 73.698331][ T6536] FS: 00007fb88dd59700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 73.707255][ T6536] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.713832][ T6536] CR2: 00007fb88dd37268 CR3: 000000007e9b4000 CR4: 00000000003506f0 [ 73.721806][ T6536] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.729765][ T6536] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.737726][ T6536] Kernel panic - not syncing: Fatal exception [ 73.744022][ T6536] Kernel Offset: disabled [ 73.748440][ T6536] Rebooting in 86400 seconds..