KASAN: null-ptr-deref Read in do_con

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
general protection fault in do_con_write	C	done		10703	1360d	1595d

done

10703

1360d

1595d

Title	Replies (including bot)	Last reply
KASAN: null-ptr-deref Read in do_con_write	0 (1)	2020/02/13 16:57

Title

Replies (including bot)

Last reply

KASAN: null-ptr-deref Read in do_con_write

0 (1)

2020/02/13 16:57

Created	Duration	User	Patch	Repo	Result
2020/07/16 06:28	10m	brookebasile@gmail.com		upstream	report log

Created

Duration

User

Patch

Repo

Result

2020/07/16 06:28

10m

brookebasile@gmail.com

upstream

report log


Created	Duration	User	Repo	Result
2020/05/17 02:10	0m	bisect fix	upstream	error job log (0)
2020/04/16 18:15	19m	bisect fix	upstream	job log (0) log
2020/03/17 05:13	20m	bisect fix	upstream	job log (0) log

================================================================== BUG: KASAN: null-ptr-deref in scr_memcpyw include/linux/vt_buffer.h:49 [inline] BUG: KASAN: null-ptr-deref in delete_char drivers/tty/vt/vt.c:852 [inline] BUG: KASAN: null-ptr-deref in csi_P drivers/tty/vt/vt.c:1985 [inline] BUG: KASAN: null-ptr-deref in do_con_trol drivers/tty/vt/vt.c:2379 [inline] BUG: KASAN: null-ptr-deref in do_con_write+0x94d2/0xf360 drivers/tty/vt/vt.c:2797 Read of size 4294967294 at addr 0000000000000012 by task syz-executor662/8804 CPU: 0 PID: 8804 Comm: syz-executor662 Not tainted 5.6.0-rc1-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+0x1fb/0x318 lib/dump_stack.c:118 __kasan_report+0x167/0x1c0 mm/kasan/report.c:510 kasan_report+0x26/0x50 mm/kasan/common.c:641 check_memory_region_inline mm/kasan/generic.c:182 [inline] check_memory_region+0x2b6/0x2f0 mm/kasan/generic.c:192 memcpy+0x28/0x60 mm/kasan/common.c:127 scr_memcpyw include/linux/vt_buffer.h:49 [inline] delete_char drivers/tty/vt/vt.c:852 [inline] csi_P drivers/tty/vt/vt.c:1985 [inline] do_con_trol drivers/tty/vt/vt.c:2379 [inline] do_con_write+0x94d2/0xf360 drivers/tty/vt/vt.c:2797 con_write+0x25/0x40 drivers/tty/vt/vt.c:3135 process_output_block drivers/tty/n_tty.c:595 [inline] n_tty_write+0xd0c/0x1200 drivers/tty/n_tty.c:2333 do_tty_write drivers/tty/tty_io.c:962 [inline] tty_write+0x5a1/0x950 drivers/tty/tty_io.c:1046 __vfs_write+0xb8/0x740 fs/read_write.c:494 vfs_write+0x270/0x580 fs/read_write.c:558 ksys_write+0x117/0x220 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:620 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4404f9 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fffb1720718 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 RDX: 0000000000000078 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 ==================================================================