random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) audit: type=1400 audit(1575758976.688:36): avc: denied { map } for pid=7036 comm="syz-executor540" path="/root/syz-executor540613663" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 ================================================================== BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:663 [inline] BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0x102/0x120 drivers/video/fbdev/core/fbmem.c:122 Read of size 1 at addr ffffffff87064ff6 by task syz-executor540/7036 CPU: 1 PID: 7036 Comm: syz-executor540 Not tainted 4.14.158-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x142/0x197 lib/dump_stack.c:58 print_address_description.cold+0x5/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:427 __fb_pad_aligned_buffer include/linux/fb.h:663 [inline] fb_pad_aligned_buffer+0x102/0x120 drivers/video/fbdev/core/fbmem.c:122 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline] bit_putcs+0xbc4/0xdb0 drivers/video/fbdev/core/bitblit.c:185 fbcon_putcs+0x3c2/0x480 drivers/video/fbdev/core/fbcon.c:1298 do_update_region+0x3b3/0x650 drivers/tty/vt/vt.c:373 redraw_screen+0x589/0x7c0 drivers/tty/vt/vt.c:704 fbcon_do_set_font+0x6d1/0x9a0 drivers/video/fbdev/core/fbcon.c:2561 fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2576 con_font_copy drivers/tty/vt/vt.c:4218 [inline] con_font_op+0x5c6/0x1060 drivers/tty/vt/vt.c:4233 vt_ioctl+0x179f/0x2170 drivers/tty/vt/vt_ioctl.c:979 tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x440269 RSP: 002b:00007ffc87e75d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269 RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000004 RBP: 00000000006cb018 R08: 000000000000000d R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b50 R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the variable: oid_index+0x76/0x9a0 Memory state around the buggy address: ffffffff87064e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff87064f00: 00 00 00 00 00 00 00 00 00 00 00 05 fa fa fa fa >ffffffff87064f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 06 fa ^ ffffffff87065000: fa fa fa fa 00 02 fa fa fa fa fa fa 00 01 fa fa ffffffff87065080: fa fa fa fa 00 00 02 fa fa fa fa fa 00 03 fa fa ==================================================================