Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.762479] ================================================================== [ 42.762519] BUG: KASAN: global-out-of-bounds in soft_cursor+0x44b/0xa30 [ 42.762530] Read of size 32 at addr ffffffff88b65c10 by task syz-executor208/8107 [ 42.762534] [ 42.762548] CPU: 0 PID: 8107 Comm: syz-executor208 Not tainted 4.19.161-syzkaller #0 [ 42.762556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.762560] Call Trace: [ 42.762577] dump_stack+0x1fc/0x2fe [ 42.762598] print_address_description.cold+0x5/0x219 [ 42.762615] kasan_report_error.cold+0x8a/0x1c7 [ 42.762628] ? soft_cursor+0x44b/0xa30 [ 42.762640] kasan_report+0x8f/0x96 [ 42.762654] ? soft_cursor+0x44b/0xa30 [ 42.762669] memcpy+0x20/0x50 [ 42.762682] soft_cursor+0x44b/0xa30 [ 42.762702] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 42.762718] bit_cursor+0x1126/0x1740 [ 42.762738] ? bit_update_start+0x1f0/0x1f0 [ 42.762752] ? __up_console_sem+0xb3/0x1c0 [ 42.762774] ? fb_get_color_depth+0x11a/0x240 [ 42.762790] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 42.762806] ? get_color+0x20e/0x410 [ 42.762820] ? bit_update_start+0x1f0/0x1f0 [ 42.762831] fbcon_cursor+0x523/0x700 [ 42.762849] hide_cursor+0x85/0x2c0 [ 42.762865] update_region+0x136/0x190 [ 42.762881] vcs_write+0x403/0xc30 [ 42.762902] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.762927] ? vcs_size+0x270/0x270 [ 42.762944] ? debug_check_no_obj_freed+0x201/0x482 [ 42.762960] __vfs_write+0xf7/0x770 [ 42.762971] ? vcs_size+0x270/0x270 [ 42.762985] ? common_file_perm+0x4e5/0x850 [ 42.762997] ? kernel_read+0x110/0x110 [ 42.763013] ? trace_hardirqs_off+0x64/0x200 [ 42.763037] ? apparmor_getprocattr+0x11d0/0x11d0 [ 42.763054] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 42.763067] ? debug_check_no_obj_freed+0x201/0x482 [ 42.763079] ? check_preemption_disabled+0x41/0x280 [ 42.763097] ? security_file_permission+0x1c0/0x220 [ 42.763118] vfs_write+0x1f3/0x540 [ 42.763135] ksys_write+0x12b/0x2a0 [ 42.763149] ? __ia32_sys_read+0xb0/0xb0 [ 42.763164] ? trace_hardirqs_off_caller+0x6e/0x210 [ 42.763180] ? do_syscall_64+0x21/0x620 [ 42.763196] do_syscall_64+0xf9/0x620 [ 42.763212] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.763223] RIP: 0033:0x440389 [ 42.763236] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 db 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 42.763244] RSP: 002b:00007fff77bd3d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 42.763257] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440389 [ 42.763265] RDX: 0000000000000121 RSI: 00000000200000c0 RDI: 0000000000000004 [ 42.763273] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 42.763281] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401bf0 [ 42.763289] R13: 0000000000401c80 R14: 0000000000000000 R15: 0000000000000000 [ 42.763306] [ 42.763310] The buggy address belongs to the variable: [ 42.763324] oid_index+0x850/0xa60 [ 42.763327] [ 42.763331] Memory state around the buggy address: [ 42.763342] ffffffff88b65b00: fa fa fa fa 04 fa fa fa fa fa fa fa 07 fa fa fa [ 42.763352] ffffffff88b65b80: fa fa fa fa 04 fa fa fa fa fa fa fa 05 fa fa fa [ 42.763362] >ffffffff88b65c00: fa fa fa fa 01 fa fa fa fa fa fa fa 00 00 02 fa [ 42.763367] ^ [ 42.763377] ffffffff88b65c80: fa fa fa fa 00 00 00 fa fa fa fa fa 00 00 00 00 [ 42.763386] ffffffff88b65d00: 00 01 fa fa fa fa fa fa 00 00 00 00 01 fa fa fa [ 42.763391] ================================================================== [ 42.763395] Disabling lock debugging due to kernel taint [ 42.773047] Kernel panic - not syncing: panic_on_warn set ... [ 42.773047] [ 42.773064] CPU: 0 PID: 8107 Comm: syz-executor208 Tainted: G B 4.19.161-syzkaller #0 [ 42.773071] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.773075] Call Trace: [ 42.773094] dump_stack+0x1fc/0x2fe [ 42.773111] panic+0x26a/0x50e [ 42.773124] ? __warn_printk+0xf3/0xf3 [ 42.773139] ? preempt_schedule_common+0x45/0xc0 [ 42.773153] ? ___preempt_schedule+0x16/0x18 [ 42.773166] ? trace_hardirqs_on+0x55/0x210 [ 42.773182] kasan_end_report+0x43/0x49 [ 42.773195] kasan_report_error.cold+0xa7/0x1c7 [ 42.773207] ? soft_cursor+0x44b/0xa30 [ 42.773218] kasan_report+0x8f/0x96 [ 42.773230] ? soft_cursor+0x44b/0xa30 [ 42.773241] memcpy+0x20/0x50 [ 42.773253] soft_cursor+0x44b/0xa30 [ 42.773269] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 42.773281] bit_cursor+0x1126/0x1740 [ 42.773297] ? bit_update_start+0x1f0/0x1f0 [ 42.773309] ? __up_console_sem+0xb3/0x1c0 [ 42.773325] ? fb_get_color_depth+0x11a/0x240 [ 42.773340] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 42.773352] ? get_color+0x20e/0x410 [ 42.773364] ? bit_update_start+0x1f0/0x1f0 [ 42.773373] fbcon_cursor+0x523/0x700 [ 42.773388] hide_cursor+0x85/0x2c0 [ 42.773402] update_region+0x136/0x190 [ 42.773416] vcs_write+0x403/0xc30 [ 42.773432] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.773446] ? vcs_size+0x270/0x270 [ 42.773461] ? debug_check_no_obj_freed+0x201/0x482 [ 42.773475] __vfs_write+0xf7/0x770 [ 42.773487] ? vcs_size+0x270/0x270 [ 42.773500] ? common_file_perm+0x4e5/0x850 [ 42.773511] ? kernel_read+0x110/0x110 [ 42.773523] ? trace_hardirqs_off+0x64/0x200 [ 42.773535] ? apparmor_getprocattr+0x11d0/0x11d0 [ 42.773550] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 42.773561] ? debug_check_no_obj_freed+0x201/0x482 [ 42.773572] ? check_preemption_disabled+0x41/0x280 [ 42.773588] ? security_file_permission+0x1c0/0x220 [ 42.773603] vfs_write+0x1f3/0x540 [ 42.773616] ksys_write+0x12b/0x2a0 [ 42.773628] ? __ia32_sys_read+0xb0/0xb0 [ 42.773641] ? trace_hardirqs_off_caller+0x6e/0x210 [ 42.773652] ? do_syscall_64+0x21/0x620 [ 42.773665] do_syscall_64+0xf9/0x620 [ 42.773678] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.773688] RIP: 0033:0x440389 [ 42.773700] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 db 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 42.773707] RSP: 002b:00007fff77bd3d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 42.773719] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440389 [ 42.773726] RDX: 0000000000000121 RSI: 00000000200000c0 RDI: 0000000000000004 [ 42.773733] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 42.773740] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401bf0 [ 42.773747] R13: 0000000000401c80 R14: 0000000000000000 R15: 0000000000000000 [ 42.774216] Kernel Offset: disabled [ 43.417751] Rebooting in 86400 seconds..