Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 115.022516] ================================================================== [ 115.030160] BUG: KMSAN: kernel-infoleak in copyout+0x16b/0x1f0 [ 115.036367] CPU: 1 PID: 10740 Comm: blkid Not tainted 5.1.0-rc4+ #1 [ 115.043151] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 115.052714] Call Trace: [ 115.055358] dump_stack+0x173/0x1d0 [ 115.059288] kmsan_report+0x131/0x2a0 [ 115.063350] kmsan_internal_check_memory+0x988/0xaa0 executing program executing program executing program executing program [ 115.068799] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 115.074344] kmsan_copy_to_user+0xab/0xc0 [ 115.078642] copyout+0x16b/0x1f0 [ 115.082090] copy_page_to_iter+0x654/0x1910 [ 115.086557] generic_file_read_iter+0x2f2c/0x4620 [ 115.091604] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 115.097007] blkdev_read_iter+0x20d/0x270 [ 115.101483] ? blkdev_write_iter+0x650/0x650 [ 115.105933] __vfs_read+0x964/0xc00 [ 115.109662] vfs_read+0x359/0x6f0 [ 115.113177] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 115.118622] ksys_read+0x20c/0x440 [ 115.122422] __se_sys_read+0x92/0xb0 [ 115.126747] __x64_sys_read+0x4a/0x70 [ 115.130681] do_syscall_64+0xbc/0xf0 [ 115.134452] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 115.139994] RIP: 0033:0x7f2ac9fa0310 [ 115.143916] Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 [ 115.164712] RSP: 002b:00007fff91046338 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 115.172465] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2ac9fa0310 [ 115.179861] RDX: 0000000000000100 RSI: 00000000010f2df8 RDI: 0000000000000003 [ 115.187357] RBP: 00000000010f2dd0 R08: 0000000000000028 R09: 0000000001680000 [ 115.194756] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000010f2030 [ 115.202055] R13: 0000000000000100 R14: 00000000010f2080 R15: 00000000010f2de8 [ 115.209423] [ 115.211082] Uninit was created at: [ 115.214811] kmsan_save_stack_with_flags+0x7a/0x130 [ 115.221667] kmsan_internal_alloc_meta_for_pages+0x112/0x500 [ 115.227597] kmsan_alloc_page+0x7e/0x100 [ 115.231711] __alloc_pages_nodemask+0x12fb/0x5e90 [ 115.236600] alloc_pages_current+0x6a4/0x9c0 [ 115.241483] __page_cache_alloc+0x95/0x320 [ 115.245754] pagecache_get_page+0x4e5/0x14e0 [ 115.250299] grab_cache_page_write_begin+0x100/0x180 [ 115.255544] block_write_begin+0x102/0x3c0 [ 115.259834] blkdev_write_begin+0xf5/0x110 [ 115.264104] generic_perform_write+0x412/0x990 [ 115.268727] __generic_file_write_iter+0x422/0xa30 [ 115.273698] blkdev_write_iter+0x3f0/0x650 [ 115.278089] __vfs_write+0x99f/0xc30 [ 115.281834] vfs_write+0x481/0x920 [ 115.285409] ksys_write+0x20c/0x440 [ 115.289251] __se_sys_write+0x92/0xb0 [ 115.293095] __x64_sys_write+0x4a/0x70 [ 115.297032] do_syscall_64+0xbc/0xf0 [ 115.300868] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 115.306283] [ 115.307941] Bytes 8-255 of 256 are uninitialized [ 115.312727] Memory access of size 256 starts at ffff8880b0f89000 [ 115.319013] Data copied to user address 00000000010f2df8 [ 115.324590] ================================================================== [ 115.332342] Disabling lock debugging due to kernel taint [ 115.337837] Kernel panic - not syncing: panic_on_warn set ... [ 115.343787] CPU: 1 PID: 10740 Comm: blkid Tainted: G B 5.1.0-rc4+ #1 [ 115.351631] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 115.361989] Call Trace: [ 115.364764] dump_stack+0x173/0x1d0 [ 115.368644] panic+0x3d1/0xb01 [ 115.371937] kmsan_report+0x29a/0x2a0 [ 115.375797] kmsan_internal_check_memory+0x988/0xaa0 [ 115.380952] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 115.386426] kmsan_copy_to_user+0xab/0xc0 [ 115.390813] copyout+0x16b/0x1f0 [ 115.394266] copy_page_to_iter+0x654/0x1910 [ 115.398828] generic_file_read_iter+0x2f2c/0x4620 [ 115.403796] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 115.409077] blkdev_read_iter+0x20d/0x270 [ 115.413293] ? blkdev_write_iter+0x650/0x650 [ 115.417902] __vfs_read+0x964/0xc00 [ 115.422005] vfs_read+0x359/0x6f0 [ 115.426504] ? kmsan_get_shadow_origin_ptr+0x73/0x480 [ 115.432018] ksys_read+0x20c/0x440 [ 115.435651] __se_sys_read+0x92/0xb0 [ 115.439456] __x64_sys_read+0x4a/0x70 [ 115.443305] do_syscall_64+0xbc/0xf0 [ 115.447189] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 115.452435] RIP: 0033:0x7f2ac9fa0310 [ 115.456824] Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 [ 115.476326] RSP: 002b:00007fff91046338 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 115.484604] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2ac9fa0310 [ 115.492379] RDX: 0000000000000100 RSI: 00000000010f2df8 RDI: 0000000000000003 [ 115.499956] RBP: 00000000010f2dd0 R08: 0000000000000028 R09: 0000000001680000 [ 115.508146] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000010f2030 [ 115.515650] R13: 0000000000000100 R14: 00000000010f2080 R15: 00000000010f2de8 [ 115.524509] Kernel Offset: disabled [ 115.528615] Rebooting in 86400 seconds..