KASAN: null-ptr-deref Read in insert

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	KASAN: null-ptr-deref Read in insert_char	11	C		inconclusive	1	1865d	2015d	0/1	upstream: reported C repro on 2020/01/09 20:28
upstream	KASAN: null-ptr-deref Read in insert_char serial	11	C	done	error	12	1888d	2016d	0/29	closed as dup on 2020/08/16 01:43

Kernel

Title

Rank 🛈

linux-4.14

KASAN: null-ptr-deref Read in insert_char

inconclusive

1865d

2015d

0/1

upstream: reported C repro on 2020/01/09 20:28

upstream

KASAN: null-ptr-deref Read in insert_char serial

done

error

1888d

2016d

0/29

closed as dup on 2020/08/16 01:43


Created	Duration	User	Repo	Result
2020/08/11 16:07	3h29m	bisect fix	linux-4.19.y	OK (1) job log
2020/07/12 15:43	24m	bisect fix	linux-4.19.y	OK (0) job log log
2020/06/12 15:17	26m	bisect fix	linux-4.19.y	OK (0) job log log
2020/05/13 14:48	28m	bisect fix	linux-4.19.y	OK (0) job log log
2020/04/13 14:23	25m	bisect fix	linux-4.19.y	OK (0) job log log
2020/03/14 13:55	27m	bisect fix	linux-4.19.y	OK (0) job log log
2020/02/08 09:46	25m	bisect fix	linux-4.19.y	OK (0) job log log

audit: type=1400 audit(1578562314.351:36): avc: denied { map } for pid=8008 comm="syz-executor864" path="/root/syz-executor864159292" dev="sda1" ino=16484 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: null-ptr-deref in memmove include/linux/string.h:363 [inline] BUG: KASAN: null-ptr-deref in scr_memmovew include/linux/vt_buffer.h:68 [inline] BUG: KASAN: null-ptr-deref in insert_char+0x206/0x450 drivers/tty/vt/vt.c:839 Read of size 4294967294 at addr 0000000000000010 by task syz-executor864/8008 CPU: 1 PID: 8008 Comm: syz-executor864 Not tainted 4.19.93-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 kasan_report_error mm/kasan/report.c:352 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x199/0x2ba 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 memmove+0x24/0x50 mm/kasan/kasan.c:293 memmove include/linux/string.h:363 [inline] scr_memmovew include/linux/vt_buffer.h:68 [inline] insert_char+0x206/0x450 drivers/tty/vt/vt.c:839 csi_at drivers/tty/vt/vt.c:1965 [inline] do_con_trol+0x3ca8/0x6070 drivers/tty/vt/vt.c:2412 do_con_write.part.0+0xfd5/0x1eb0 drivers/tty/vt/vt.c:2773 do_con_write drivers/tty/vt/vt.c:2541 [inline] con_write+0x46/0xd0 drivers/tty/vt/vt.c:3110 process_output_block drivers/tty/n_tty.c:593 [inline] n_tty_write+0x3f9/0x1140 drivers/tty/n_tty.c:2331 do_tty_write drivers/tty/tty_io.c:960 [inline] tty_write+0x458/0x7a0 drivers/tty/tty_io.c:1044 __vfs_write+0x114/0x810 fs/read_write.c:485 vfs_write+0x20c/0x560 fs/read_write.c:549 ksys_write+0x14f/0x2d0 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:608 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 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:00007fff1e748358 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 ==================================================================

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Manager
2020/01/09 09:34	linux-4.19.y	3d40d7117e35	ddc3e859	.config	console log	report	syz	C	ci2-linux-4-19
2020/02/13 13:55	linux-4.19.y	357668399cf7	e6247653	.config	console log	report			ci2-linux-4-19
2019/12/30 16:35	linux-4.19.y	672481c2deff	6b36d338	.config	console log	report			ci2-linux-4-19

Crashes (3):

Assets (help?)