Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.123' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.943733][ T8455] general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN [ 77.955726][ T8455] KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] [ 77.964208][ T8455] CPU: 1 PID: 8455 Comm: syz-executor893 Not tainted 5.13.0-rc3-syzkaller #0 [ 77.973058][ T8455] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.983477][ T8455] RIP: 0010:smc_tx_sendmsg+0x204/0x1ba0 [ 77.989095][ T8455] Code: 48 c1 ea 03 80 3c 02 00 0f 85 8b 17 00 00 49 8b 9d 08 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8f 17 00 00 48 63 5b 20 4c 8b [ 78.008687][ T8455] RSP: 0018:ffffc9000164f800 EFLAGS: 00010202 [ 78.014867][ T8455] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 78.022842][ T8455] RDX: 0000000000000004 RSI: ffffffff889cd6ae RDI: 0000000000000020 [ 78.030800][ T8455] RBP: ffff88801cf58000 R08: 0000000000000000 R09: 0000000000000000 [ 78.038767][ T8455] R10: ffffffff889cd6a1 R11: 0000000000000000 R12: 0000000000000000 [ 78.046798][ T8455] R13: ffff88801cf58000 R14: ffffc9000164fd90 R15: ffff88801cf58060 [ 78.054918][ T8455] FS: 0000000000ebf300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 78.064050][ T8455] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.070828][ T8455] CR2: 00007ffd43ca1328 CR3: 000000002acf2000 CR4: 00000000001506e0 [ 78.078793][ T8455] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.086759][ T8455] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.094722][ T8455] Call Trace: [ 78.097991][ T8455] ? lock_chain_count+0x20/0x20 [ 78.102895][ T8455] ? lock_release+0x720/0x720 [ 78.107556][ T8455] ? smc_tx_sndbuf_nonempty+0x640/0x640 [ 78.113098][ T8455] ? do_raw_spin_lock+0x120/0x2b0 [ 78.118113][ T8455] ? mark_held_locks+0x9f/0xe0 [ 78.123035][ T8455] ? __local_bh_enable_ip+0xa0/0x120 [ 78.128317][ T8455] smc_sendmsg+0x274/0x5b0 [ 78.132722][ T8455] ? security_socket_sendmsg+0x83/0xb0 [ 78.138295][ T8455] ? smc_switch_to_fallback+0x3d0/0x3d0 [ 78.143834][ T8455] sock_sendmsg+0xcf/0x120 [ 78.148437][ T8455] ____sys_sendmsg+0x331/0x810 [ 78.153206][ T8455] ? kernel_sendmsg+0x50/0x50 [ 78.157892][ T8455] ? do_recvmmsg+0x6d0/0x6d0 [ 78.162467][ T8455] ? mark_lock+0xef/0x17b0 [ 78.166987][ T8455] ___sys_sendmsg+0xf3/0x170 [ 78.171602][ T8455] ? sendmsg_copy_msghdr+0x160/0x160 [ 78.177011][ T8455] ? mark_lock+0xef/0x17b0 [ 78.181484][ T8455] ? find_held_lock+0x2d/0x110 [ 78.186358][ T8455] ? lock_chain_count+0x20/0x20 [ 78.191406][ T8455] ? lock_chain_count+0x20/0x20 [ 78.196255][ T8455] ? do_huge_pmd_anonymous_page+0x124b/0x2570 [ 78.202356][ T8455] ? lock_downgrade+0x6e0/0x6e0 [ 78.207299][ T8455] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 78.213560][ T8455] ? __fget_light+0x215/0x280 [ 78.218253][ T8455] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 78.224491][ T8455] __sys_sendmmsg+0x195/0x470 [ 78.229176][ T8455] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 78.234182][ T8455] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 78.240151][ T8455] ? find_held_lock+0x2d/0x110 [ 78.244909][ T8455] ? __context_tracking_exit+0xb8/0xe0 [ 78.250377][ T8455] ? lock_downgrade+0x6e0/0x6e0 [ 78.255224][ T8455] ? lock_downgrade+0x6e0/0x6e0 [ 78.260065][ T8455] __x64_sys_sendmmsg+0x99/0x100 [ 78.265013][ T8455] ? syscall_enter_from_user_mode+0x27/0x70 [ 78.270901][ T8455] do_syscall_64+0x3a/0xb0 [ 78.275386][ T8455] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 78.281279][ T8455] RIP: 0033:0x43ee89 [ 78.285266][ T8455] 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 [ 78.304969][ T8455] RSP: 002b:00007ffc82b20a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 78.313639][ T8455] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee89 [ 78.321612][ T8455] RDX: 0000000000000001 RSI: 0000000020003d80 RDI: 0000000000000003 [ 78.329688][ T8455] RBP: 0000000000402e70 R08: 0000000000000000 R09: 0000000000400488 [ 78.338189][ T8455] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402f00 [ 78.346149][ T8455] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 78.354117][ T8455] Modules linked in: [ 78.363732][ T8455] ---[ end trace 459b28282ae53115 ]--- [ 78.369735][ T8455] RIP: 0010:smc_tx_sendmsg+0x204/0x1ba0 [ 78.375723][ T8455] Code: 48 c1 ea 03 80 3c 02 00 0f 85 8b 17 00 00 49 8b 9d 08 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8f 17 00 00 48 63 5b 20 4c 8b [ 78.396086][ T8455] RSP: 0018:ffffc9000164f800 EFLAGS: 00010202 [ 78.402449][ T8455] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 78.410569][ T8455] RDX: 0000000000000004 RSI: ffffffff889cd6ae RDI: 0000000000000020 [ 78.418891][ T8455] RBP: ffff88801cf58000 R08: 0000000000000000 R09: 0000000000000000 [ 78.427028][ T8455] R10: ffffffff889cd6a1 R11: 0000000000000000 R12: 0000000000000000 [ 78.443321][ T8455] R13: ffff88801cf58000 R14: ffffc9000164fd90 R15: ffff88801cf58060 [ 78.451335][ T8455] FS: 0000000000ebf300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 78.460469][ T8455] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.467122][ T8455] CR2: 000055b7501be298 CR3: 000000002acf2000 CR4: 00000000001506f0 [ 78.475571][ T8455] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.483755][ T8455] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.491749][ T8455] Kernel panic - not syncing: Fatal exception [ 78.499532][ T8455] Kernel Offset: disabled [ 78.503853][ T8455] Rebooting in 86400 seconds..