audit: type=1400 audit(1577900454.396:35): avc: denied { map } for pid=7719 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1577900465.766:36): avc: denied { map } for pid=7731 comm="syz-executor364" path="/root/syz-executor364662320" 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 memcpy include/linux/string.h:348 [inline] BUG: KASAN: global-out-of-bounds in fbcon_get_font+0x2b2/0x5e0 drivers/video/fbdev/core/fbcon.c:2443 Read of size 32 at addr ffffffff87ecb9e0 by task syz-executor364/7733 CPU: 0 PID: 7733 Comm: syz-executor364 Not tainted 4.19.92-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.cold+0x5/0x20d mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x123/0x190 mm/kasan/kasan.c:267 memcpy+0x24/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:348 [inline] fbcon_get_font+0x2b2/0x5e0 drivers/video/fbdev/core/fbcon.c:2443 con_font_get drivers/tty/vt/vt.c:4400 [inline] con_font_op+0x20b/0x1250 drivers/tty/vt/vt.c:4559 vt_ioctl+0xd2e/0x2530 drivers/tty/vt/vt_ioctl.c:913 tty_ioctl+0x7f3/0x1510 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4459b9 Code: e8 fc b8 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa968113db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006dac58 RCX: 00000000004459b9 RDX: 0000000020000200 RSI: 0000000000004b60 RDI: 0000000000000007 RBP: 00000000006dac50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac5c R13: 00007ffece8c78ff R14: 00007fa9681149c0 R15: 20c49ba5e353f7cf The buggy address belongs to the variable: fontdata_8x16+0x1000/0x1120 Memory state around the buggy address: ffffffff87ecb880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff87ecb900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffff87ecb980: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa ^ ffffffff87ecba00: 06 fa fa fa fa fa fa fa 05 fa fa fa fa fa fa fa ffffffff87ecba80: 06 fa fa fa fa fa fa fa 00 00 03 fa fa fa fa fa ==================================================================