[ 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 Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts. syzkaller login: [ 131.902549][ T8211] IPVS: ftp: loaded support on port[0] = 21 executing program [ 131.984250][ T8234] ===================================================== [ 131.991312][ T8234] BUG: KMSAN: uninit-value in __ethtool_get_link_ksettings+0x503/0x5a0 [ 131.999575][ T8234] CPU: 1 PID: 8234 Comm: syz-executor681 Not tainted 5.12.0-rc6-syzkaller #0 [ 132.008339][ T8234] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 132.018423][ T8234] Call Trace: [ 132.021748][ T8234] dump_stack+0x24c/0x2e0 [ 132.026079][ T8234] kmsan_report+0xfb/0x1e0 [ 132.030517][ T8234] __msan_warning+0x5c/0xa0 [ 132.035007][ T8234] __ethtool_get_link_ksettings+0x503/0x5a0 [ 132.040895][ T8234] linkinfo_prepare_data+0x1e8/0x4b0 [ 132.046175][ T8234] ? strset_cleanup_data+0x190/0x190 [ 132.051449][ T8234] ethnl_default_notify+0x432/0x1030 [ 132.056734][ T8234] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 132.062803][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.067996][ T8234] ethtool_notify+0x259/0x520 [ 132.072687][ T8234] dev_ethtool+0xe228/0xe7b0 [ 132.077271][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.082475][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.087664][ T8234] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 132.093490][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.098703][ T8234] dev_ioctl+0x5a3/0x1260 [ 132.103053][ T8234] sock_do_ioctl+0x477/0x700 [ 132.107642][ T8234] sock_ioctl+0x997/0xef0 [ 132.111967][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.117150][ T8234] ? sock_poll+0x690/0x690 [ 132.121552][ T8234] __se_sys_ioctl+0x311/0x4d0 [ 132.126220][ T8234] __x64_sys_ioctl+0x4a/0x70 [ 132.130802][ T8234] do_syscall_64+0x9f/0x140 [ 132.135300][ T8234] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 132.141230][ T8234] RIP: 0033:0x440ac9 [ 132.145124][ T8234] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 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 [ 132.164716][ T8234] RSP: 002b:00007ffd7b880628 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 132.173117][ T8234] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000440ac9 [ 132.181102][ T8234] RDX: 0000000020000380 RSI: 0000000000008946 RDI: 0000000000000003 [ 132.189061][ T8234] RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff [ 132.197030][ T8234] R10: 00007ffd7b8800a0 R11: 0000000000000246 R12: 0000000000000000 [ 132.204999][ T8234] R13: 00007ffd7b880650 R14: 00007ffd7b880640 R15: 0000000000000003 [ 132.213023][ T8234] [ 132.215341][ T8234] Uninit was stored to memory at: [ 132.220355][ T8234] kmsan_internal_chain_origin+0xad/0x130 [ 132.226069][ T8234] kmsan_memcpy_memmove_metadata+0x25e/0x2d0 [ 132.232049][ T8234] kmsan_memcpy_metadata+0xb/0x10 [ 132.237063][ T8234] __msan_memcpy+0x46/0x60 [ 132.241486][ T8234] tun_get_link_ksettings+0x7c/0xb0 [ 132.246673][ T8234] __ethtool_get_link_ksettings+0x204/0x5a0 [ 132.252575][ T8234] linkinfo_prepare_data+0x1e8/0x4b0 [ 132.257873][ T8234] ethnl_default_notify+0x432/0x1030 [ 132.263154][ T8234] ethtool_notify+0x259/0x520 [ 132.267850][ T8234] dev_ethtool+0xe228/0xe7b0 [ 132.272466][ T8234] dev_ioctl+0x5a3/0x1260 [ 132.276806][ T8234] sock_do_ioctl+0x477/0x700 [ 132.281393][ T8234] sock_ioctl+0x997/0xef0 [ 132.285717][ T8234] __se_sys_ioctl+0x311/0x4d0 [ 132.290396][ T8234] __x64_sys_ioctl+0x4a/0x70 [ 132.294985][ T8234] do_syscall_64+0x9f/0x140 [ 132.299476][ T8234] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 132.305370][ T8234] [ 132.307774][ T8234] Uninit was stored to memory at: [ 132.312784][ T8234] kmsan_internal_chain_origin+0xad/0x130 [ 132.318509][ T8234] kmsan_memcpy_memmove_metadata+0x25e/0x2d0 [ 132.324485][ T8234] kmsan_memcpy_metadata+0xb/0x10 [ 132.329500][ T8234] __msan_memcpy+0x46/0x60 [ 132.333923][ T8234] tun_set_link_ksettings+0x7e/0xb0 [ 132.339129][ T8234] dev_ethtool+0xe1a2/0xe7b0 [ 132.343708][ T8234] dev_ioctl+0x5a3/0x1260 [ 132.348033][ T8234] sock_do_ioctl+0x477/0x700 [ 132.352647][ T8234] sock_ioctl+0x997/0xef0 [ 132.356964][ T8234] __se_sys_ioctl+0x311/0x4d0 [ 132.361639][ T8234] __x64_sys_ioctl+0x4a/0x70 [ 132.366232][ T8234] do_syscall_64+0x9f/0x140 [ 132.370737][ T8234] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 132.376617][ T8234] [ 132.378922][ T8234] Local variable ----link_ksettings.i893@dev_ethtool created at: [ 132.386611][ T8234] dev_ethtool+0x3cdc/0xe7b0 [ 132.391192][ T8234] dev_ethtool+0x3cdc/0xe7b0 [ 132.395798][ T8234] ===================================================== [ 132.402724][ T8234] Disabling lock debugging due to kernel taint [ 132.408883][ T8234] Kernel panic - not syncing: panic_on_kmsan set ... [ 132.415588][ T8234] CPU: 1 PID: 8234 Comm: syz-executor681 Tainted: G B 5.12.0-rc6-syzkaller #0 [ 132.425763][ T8234] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 132.435804][ T8234] Call Trace: [ 132.439075][ T8234] dump_stack+0x24c/0x2e0 [ 132.443411][ T8234] panic+0x4c6/0xea7 [ 132.447329][ T8234] ? add_taint+0x17c/0x210 [ 132.451732][ T8234] kmsan_report+0x1de/0x1e0 [ 132.456315][ T8234] __msan_warning+0x5c/0xa0 [ 132.460815][ T8234] __ethtool_get_link_ksettings+0x503/0x5a0 [ 132.466737][ T8234] linkinfo_prepare_data+0x1e8/0x4b0 [ 132.472059][ T8234] ? strset_cleanup_data+0x190/0x190 [ 132.477353][ T8234] ethnl_default_notify+0x432/0x1030 [ 132.482626][ T8234] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 132.488683][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.493882][ T8234] ethtool_notify+0x259/0x520 [ 132.498546][ T8234] dev_ethtool+0xe228/0xe7b0 [ 132.503128][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.508329][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.513515][ T8234] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 132.519307][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.524494][ T8234] dev_ioctl+0x5a3/0x1260 [ 132.528810][ T8234] sock_do_ioctl+0x477/0x700 [ 132.533391][ T8234] sock_ioctl+0x997/0xef0 [ 132.537717][ T8234] ? kmsan_get_metadata+0x116/0x180 [ 132.542931][ T8234] ? sock_poll+0x690/0x690 [ 132.547364][ T8234] __se_sys_ioctl+0x311/0x4d0 [ 132.552035][ T8234] __x64_sys_ioctl+0x4a/0x70 [ 132.556613][ T8234] do_syscall_64+0x9f/0x140 [ 132.561117][ T8234] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 132.566996][ T8234] RIP: 0033:0x440ac9 [ 132.570872][ T8234] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 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 [ 132.590463][ T8234] RSP: 002b:00007ffd7b880628 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 132.598862][ T8234] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000440ac9 [ 132.606818][ T8234] RDX: 0000000020000380 RSI: 0000000000008946 RDI: 0000000000000003 [ 132.614788][ T8234] RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff [ 132.622745][ T8234] R10: 00007ffd7b8800a0 R11: 0000000000000246 R12: 0000000000000000 [ 132.630704][ T8234] R13: 00007ffd7b880650 R14: 00007ffd7b880640 R15: 0000000000000003 [ 132.639589][ T8234] Kernel Offset: disabled [ 132.643940][ T8234] Rebooting in 86400 seconds..