Warning: Permanently added '10.128.0.72' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 149.057157][ T8471] ===================================================== [ 149.064135][ T8471] BUG: KMSAN: kernel-infoleak in kmsan_copy_to_user+0x81/0x90 [ 149.071600][ T8471] CPU: 0 PID: 8471 Comm: syz-executor330 Not tainted 5.8.0-rc5-syzkaller #0 [ 149.080270][ T8471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 149.090366][ T8471] Call Trace: [ 149.093684][ T8471] dump_stack+0x21c/0x280 [ 149.098024][ T8471] kmsan_report+0xf7/0x1e0 [ 149.102457][ T8471] kmsan_internal_check_memory+0x358/0x3d0 [ 149.108265][ T8471] ? kmsan_get_metadata+0x116/0x180 [ 149.113466][ T8471] kmsan_copy_to_user+0x81/0x90 [ 149.118329][ T8471] _copy_to_user+0x18e/0x260 [ 149.122922][ T8471] fb_read+0xa30/0xcf0 [ 149.127010][ T8471] ? fb_seq_show+0x1a0/0x1a0 [ 149.131612][ T8471] do_iter_read+0xa95/0x1020 [ 149.136238][ T8471] do_readv+0x3c1/0x7f0 [ 149.140408][ T8471] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 149.146213][ T8471] ? kmsan_get_metadata+0x116/0x180 [ 149.151611][ T8471] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 149.157419][ T8471] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 149.163571][ T8471] __se_sys_readv+0x9b/0xb0 [ 149.168082][ T8471] __x64_sys_readv+0x4a/0x70 [ 149.172662][ T8471] do_syscall_64+0xad/0x160 [ 149.177154][ T8471] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 149.183044][ T8471] RIP: 0033:0x440239 [ 149.186919][ T8471] Code: Bad RIP value. [ 149.190983][ T8471] RSP: 002b:00007ffdec11dff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 149.199387][ T8471] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 149.207420][ T8471] RDX: 0000000000000001 RSI: 0000000020000900 RDI: 0000000000000003 [ 149.215827][ T8471] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 149.223796][ T8471] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 149.231758][ T8471] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 149.240508][ T8471] [ 149.242829][ T8471] Uninit was created at: [ 149.247172][ T8471] kmsan_internal_poison_shadow+0x66/0xd0 [ 149.252895][ T8471] kmsan_slab_alloc+0x8a/0xe0 [ 149.257558][ T8471] __kmalloc+0x312/0x410 [ 149.261812][ T8471] fb_read+0x71a/0xcf0 [ 149.265870][ T8471] do_iter_read+0xa95/0x1020 [ 149.270447][ T8471] do_readv+0x3c1/0x7f0 [ 149.274596][ T8471] __se_sys_readv+0x9b/0xb0 [ 149.279102][ T8471] __x64_sys_readv+0x4a/0x70 [ 149.283958][ T8471] do_syscall_64+0xad/0x160 [ 149.288448][ T8471] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 149.294331][ T8471] [ 149.296648][ T8471] Bytes 0-250 of 251 are uninitialized [ 149.302699][ T8471] Memory access of size 251 starts at ffff8881068b4900 [ 149.309792][ T8471] Data copied to user address 00000000200000c0 [ 149.315931][ T8471] ===================================================== [ 149.322859][ T8471] Disabling lock debugging due to kernel taint [ 149.329006][ T8471] Kernel panic - not syncing: panic_on_warn set ... [ 149.335593][ T8471] CPU: 0 PID: 8471 Comm: syz-executor330 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 149.345652][ T8471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 149.355712][ T8471] Call Trace: [ 149.359013][ T8471] dump_stack+0x21c/0x280 [ 149.363372][ T8471] panic+0x4d7/0xef7 [ 149.367369][ T8471] ? add_taint+0x17c/0x210 [ 149.371802][ T8471] kmsan_report+0x1df/0x1e0 [ 149.376581][ T8471] kmsan_internal_check_memory+0x358/0x3d0 [ 149.382405][ T8471] ? kmsan_get_metadata+0x116/0x180 [ 149.387635][ T8471] kmsan_copy_to_user+0x81/0x90 [ 149.392487][ T8471] _copy_to_user+0x18e/0x260 [ 149.397091][ T8471] fb_read+0xa30/0xcf0 [ 149.401202][ T8471] ? fb_seq_show+0x1a0/0x1a0 [ 149.405793][ T8471] do_iter_read+0xa95/0x1020 [ 149.410406][ T8471] do_readv+0x3c1/0x7f0 [ 149.414581][ T8471] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 149.420382][ T8471] ? kmsan_get_metadata+0x116/0x180 [ 149.425631][ T8471] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 149.431437][ T8471] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 149.437595][ T8471] __se_sys_readv+0x9b/0xb0 [ 149.442107][ T8471] __x64_sys_readv+0x4a/0x70 [ 149.446689][ T8471] do_syscall_64+0xad/0x160 [ 149.451185][ T8471] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 149.457074][ T8471] RIP: 0033:0x440239 [ 149.460966][ T8471] Code: Bad RIP value. [ 149.465027][ T8471] RSP: 002b:00007ffdec11dff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 149.474385][ T8471] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 149.482461][ T8471] RDX: 0000000000000001 RSI: 0000000020000900 RDI: 0000000000000003 [ 149.490427][ T8471] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 149.498403][ T8471] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 149.506365][ T8471] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 149.515276][ T8471] Kernel Offset: disabled [ 149.519608][ T8471] Rebooting in 86400 seconds..