Warning: Permanently added '10.128.0.111' (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 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 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 executing program executing program executing program executing program executing program [ 36.473267] ================================================================== [ 36.473293] BUG: KASAN: slab-out-of-bounds in soft_cursor+0x44b/0xa30 [ 36.473299] Read of size 15 at addr ffff8880a997c970 by task kworker/0:2/3545 [ 36.473301] [ 36.473310] CPU: 0 PID: 3545 Comm: kworker/0:2 Not tainted 4.19.186-syzkaller #0 [ 36.473315] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.473323] Workqueue: events_power_efficient fb_flashcursor [ 36.473327] Call Trace: [ 36.473339] dump_stack+0x1fc/0x2ef [ 36.473351] print_address_description.cold+0x54/0x219 [ 36.473360] kasan_report_error.cold+0x8a/0x1b9 [ 36.473368] ? soft_cursor+0x44b/0xa30 [ 36.473377] kasan_report+0x8f/0xa0 [ 36.473384] ? soft_cursor+0x44b/0xa30 [ 36.473393] memcpy+0x20/0x50 [ 36.473400] soft_cursor+0x44b/0xa30 [ 36.473413] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.473422] bit_cursor+0x1126/0x1740 [ 36.473440] ? bit_update_start+0x1f0/0x1f0 [ 36.473447] ? lock_downgrade+0x720/0x720 [ 36.473460] ? __down_trylock_console_sem+0x16b/0x210 [ 36.473470] ? fb_get_color_depth+0x11a/0x240 [ 36.473480] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 36.473487] ? get_color+0x20e/0x410 [ 36.473495] ? bit_update_start+0x1f0/0x1f0 [ 36.473502] fb_flashcursor+0x38c/0x430 [ 36.473513] process_one_work+0x864/0x1570 [ 36.473525] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 36.473537] worker_thread+0x64c/0x1130 [ 36.473549] ? __kthread_parkme+0x133/0x1e0 [ 36.473556] ? process_one_work+0x1570/0x1570 [ 36.473563] kthread+0x33f/0x460 [ 36.473569] ? kthread_park+0x180/0x180 [ 36.473579] ret_from_fork+0x24/0x30 [ 36.473588] [ 36.473591] Allocated by task 8107: [ 36.473598] __kmalloc+0x15a/0x3c0 [ 36.473604] fbcon_set_font+0x34f/0x8a0 [ 36.473611] con_font_op+0x94b/0xf20 [ 36.473618] vt_ioctl+0x116b/0x2380 [ 36.473626] tty_ioctl+0x5b0/0x15c0 [ 36.473633] do_vfs_ioctl+0xcdb/0x12e0 [ 36.473638] ksys_ioctl+0x9b/0xc0 [ 36.473644] __x64_sys_ioctl+0x6f/0xb0 [ 36.473651] do_syscall_64+0xf9/0x620 [ 36.473657] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.473659] [ 36.473662] Freed by task 7808: [ 36.473668] kfree+0xcc/0x210 [ 36.473675] load_elf_binary+0x2349/0x5050 [ 36.473682] search_binary_handler.part.0+0xf9/0x4e0 [ 36.473688] __do_execve_file+0x1357/0x2360 [ 36.473694] do_execve+0x35/0x50 [ 36.473700] __x64_sys_execve+0x7c/0xa0 [ 36.473705] do_syscall_64+0xf9/0x620 [ 36.473712] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.473714] [ 36.473719] The buggy address belongs to the object at ffff8880a997c780 [ 36.473719] which belongs to the cache kmalloc-512 of size 512 [ 36.473725] The buggy address is located 496 bytes inside of [ 36.473725] 512-byte region [ffff8880a997c780, ffff8880a997c980) [ 36.473727] The buggy address belongs to the page: [ 36.473734] page:ffffea0002a65f00 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 [ 36.473739] flags: 0xfff00000000100(slab) [ 36.473749] raw: 00fff00000000100 ffffea00028ceb88 ffffea0002c2a9c8 ffff88813bff0940 [ 36.473757] raw: 0000000000000000 ffff8880a997c000 0000000100000006 0000000000000000 [ 36.473759] page dumped because: kasan: bad access detected [ 36.473761] [ 36.473763] Memory state around the buggy address: [ 36.473768] ffff8880a997c800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.473774] ffff8880a997c880: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.473779] >ffff8880a997c900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.473781] ^ [ 36.473787] ffff8880a997c980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.473792] ffff8880a997ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.473794] ================================================================== [ 36.473797] Disabling lock debugging due to kernel taint [ 36.473800] Kernel panic - not syncing: panic_on_warn set ... [ 36.473800] [ 36.473807] CPU: 0 PID: 3545 Comm: kworker/0:2 Tainted: G B 4.19.186-syzkaller #0 [ 36.473811] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.473816] Workqueue: events_power_efficient fb_flashcursor [ 36.473819] Call Trace: [ 36.473826] dump_stack+0x1fc/0x2ef [ 36.473835] panic+0x26a/0x50e [ 36.473841] ? __warn_printk+0xf3/0xf3 [ 36.473849] ? lock_downgrade+0x720/0x720 [ 36.473857] ? print_shadow_for_address+0xb8/0x114 [ 36.473864] ? trace_hardirqs_on+0x55/0x210 [ 36.473872] kasan_end_report+0x43/0x49 [ 36.473879] kasan_report_error.cold+0xa7/0x1b9 [ 36.473886] ? soft_cursor+0x44b/0xa30 [ 36.473892] kasan_report+0x8f/0xa0 [ 36.473899] ? soft_cursor+0x44b/0xa30 [ 36.473906] memcpy+0x20/0x50 [ 36.473912] soft_cursor+0x44b/0xa30 [ 36.473921] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.473928] bit_cursor+0x1126/0x1740 [ 36.473938] ? bit_update_start+0x1f0/0x1f0 [ 36.473945] ? lock_downgrade+0x720/0x720 [ 36.473954] ? __down_trylock_console_sem+0x16b/0x210 [ 36.473961] ? fb_get_color_depth+0x11a/0x240 [ 36.473968] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 36.473975] ? get_color+0x20e/0x410 [ 36.473981] ? bit_update_start+0x1f0/0x1f0 [ 36.473988] fb_flashcursor+0x38c/0x430 [ 36.473995] process_one_work+0x864/0x1570 [ 36.474004] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 36.474013] worker_thread+0x64c/0x1130 [ 36.474021] ? __kthread_parkme+0x133/0x1e0 [ 36.474028] ? process_one_work+0x1570/0x1570 [ 36.474034] kthread+0x33f/0x460 [ 36.474039] ? kthread_park+0x180/0x180 [ 36.474046] ret_from_fork+0x24/0x30 [ 36.474883] Kernel Offset: disabled [ 37.008206] Rebooting in 86400 seconds..