Warning: Permanently added '10.128.1.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 144.230101][ T8217] ===================================================== [ 144.237173][ T8217] BUG: KMSAN: kernel-infoleak in kmsan_copy_to_user+0x9c/0xb0 [ 144.244660][ T8217] CPU: 0 PID: 8217 Comm: syz-executor698 Not tainted 5.10.0-rc4-syzkaller #0 [ 144.253430][ T8217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 144.263478][ T8217] Call Trace: [ 144.266756][ T8217] dump_stack+0x21c/0x280 [ 144.271067][ T8217] kmsan_report+0xfb/0x1e0 [ 144.275472][ T8217] kmsan_internal_check_memory+0x484/0x520 [ 144.281260][ T8217] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 144.287316][ T8217] ? should_fail+0x72/0x9e0 [ 144.291808][ T8217] kmsan_copy_to_user+0x9c/0xb0 [ 144.296636][ T8217] _copy_to_user+0x1ac/0x270 [ 144.301210][ T8217] vmci_host_unlocked_ioctl+0x3489/0x59b0 [ 144.306924][ T8217] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 144.312973][ T8217] ? do_vfs_ioctl+0x117f/0x3510 [ 144.317800][ T8217] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 144.323583][ T8217] ? kmsan_get_metadata+0x116/0x180 [ 144.328776][ T8217] ? vmci_host_poll+0x3d0/0x3d0 [ 144.333617][ T8217] __se_sys_ioctl+0x311/0x4d0 [ 144.338275][ T8217] __x64_sys_ioctl+0x4a/0x70 [ 144.342844][ T8217] do_syscall_64+0x9f/0x140 [ 144.347328][ T8217] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 144.353197][ T8217] RIP: 0033:0x442879 [ 144.357069][ T8217] 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 c0 ff ff ff f7 d8 64 89 01 48 [ 144.376658][ T8217] RSP: 002b:00007ffdb193eb18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 144.385060][ T8217] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 0000000000442879 [ 144.393025][ T8217] RDX: 0000000020001540 RSI: 00000000000007b1 RDI: 0000000000000003 [ 144.401105][ T8217] RBP: 0000000000000000 R08: 00007ffdb193ecb8 R09: 00007ffdb193ecb8 [ 144.409162][ T8217] R10: 00007ffdb193ecb8 R11: 0000000000000246 R12: 0000000000406100 [ 144.417125][ T8217] R13: 431bde82d7b634db R14: 00000000004b0018 R15: 0000000000400488 [ 144.425073][ T8217] [ 144.427376][ T8217] Uninit was created at: [ 144.431604][ T8217] kmsan_internal_poison_shadow+0x5c/0xf0 [ 144.437300][ T8217] kmsan_slab_alloc+0x8d/0xe0 [ 144.441971][ T8217] __kmalloc+0x307/0x550 [ 144.446204][ T8217] vmci_ctx_get_chkpt_state+0x6fe/0xf20 [ 144.451738][ T8217] vmci_host_unlocked_ioctl+0x2e05/0x59b0 [ 144.457524][ T8217] __se_sys_ioctl+0x311/0x4d0 [ 144.462177][ T8217] __x64_sys_ioctl+0x4a/0x70 [ 144.466763][ T8217] do_syscall_64+0x9f/0x140 [ 144.471245][ T8217] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 144.477105][ T8217] [ 144.479411][ T8217] Bytes 8-15 of 16 are uninitialized [ 144.484669][ T8217] Memory access of size 16 starts at ffff888125ea7100 [ 144.491401][ T8217] Data copied to user address 0000000020000540 [ 144.497524][ T8217] ===================================================== [ 144.504431][ T8217] Disabling lock debugging due to kernel taint [ 144.510557][ T8217] Kernel panic - not syncing: panic_on_warn set ... [ 144.517160][ T8217] CPU: 0 PID: 8217 Comm: syz-executor698 Tainted: G B 5.10.0-rc4-syzkaller #0 [ 144.527282][ T8217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 144.537319][ T8217] Call Trace: [ 144.540608][ T8217] dump_stack+0x21c/0x280 [ 144.544920][ T8217] panic+0x4c6/0xea7 [ 144.548810][ T8217] ? add_taint+0x17c/0x210 [ 144.553214][ T8217] kmsan_report+0x1de/0x1e0 [ 144.557695][ T8217] kmsan_internal_check_memory+0x484/0x520 [ 144.563479][ T8217] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 144.569523][ T8217] ? should_fail+0x72/0x9e0 [ 144.574018][ T8217] kmsan_copy_to_user+0x9c/0xb0 [ 144.578867][ T8217] _copy_to_user+0x1ac/0x270 [ 144.583460][ T8217] vmci_host_unlocked_ioctl+0x3489/0x59b0 [ 144.589177][ T8217] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 144.595233][ T8217] ? do_vfs_ioctl+0x117f/0x3510 [ 144.600074][ T8217] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 144.605859][ T8217] ? kmsan_get_metadata+0x116/0x180 [ 144.611052][ T8217] ? vmci_host_poll+0x3d0/0x3d0 [ 144.615895][ T8217] __se_sys_ioctl+0x311/0x4d0 [ 144.620570][ T8217] __x64_sys_ioctl+0x4a/0x70 [ 144.625142][ T8217] do_syscall_64+0x9f/0x140 [ 144.629628][ T8217] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 144.635500][ T8217] RIP: 0033:0x442879 [ 144.639431][ T8217] 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 c0 ff ff ff f7 d8 64 89 01 48 [ 144.659030][ T8217] RSP: 002b:00007ffdb193eb18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 144.667426][ T8217] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 0000000000442879 [ 144.675376][ T8217] RDX: 0000000020001540 RSI: 00000000000007b1 RDI: 0000000000000003 [ 144.683324][ T8217] RBP: 0000000000000000 R08: 00007ffdb193ecb8 R09: 00007ffdb193ecb8 [ 144.691273][ T8217] R10: 00007ffdb193ecb8 R11: 0000000000000246 R12: 0000000000406100 [ 144.699224][ T8217] R13: 431bde82d7b634db R14: 00000000004b0018 R15: 0000000000400488 [ 144.707756][ T8217] Kernel Offset: disabled [ 144.712074][ T8217] Rebooting in 86400 seconds..