KASAN: null-ptr-deref Read in insert

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KASAN: null-ptr-deref Read in insert_char serial	11	syz, C	done	error	12	2282d	2410d	0/29	closed as dup on 2020/08/16 01:43
linux-4.19	KASAN: null-ptr-deref Read in insert_char	11	syz, C		done	3	2224d	2419d	1/1	fixed on 2020/08/11 22:51

Kernel

Title

Rank 🛈

upstream

KASAN: null-ptr-deref Read in insert_char serial

syz, C

done

error

2282d

2410d

0/29

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

linux-4.19

KASAN: null-ptr-deref Read in insert_char

syz, C

done

2224d

2419d

1/1

fixed on 2020/08/11 22:51

Created	Duration	User	Patch	Repo	Result
2023/01/23 13:32	13m	retest repro		linux-4.14.y	report log
2022/09/06 08:27	10m	retest repro		linux-4.14.y	report log

Created

Duration

User

Patch

Repo

Result

2023/01/23 13:32

13m

retest repro

linux-4.14.y

report log

2022/09/06 08:27

10m

retest repro

linux-4.14.y

report log


Created	Duration	User	Repo	Result
2020/07/07 23:27	31m	bisect fix	linux-4.14.y	OK (2) job log
2020/06/07 23:02	24m	bisect fix	linux-4.14.y	OK (0) job log log
2020/05/08 22:36	25m	bisect fix	linux-4.14.y	OK (0) job log log
2020/04/08 22:11	24m	bisect fix	linux-4.14.y	OK (0) job log log
2020/03/09 21:45	25m	bisect fix	linux-4.14.y	OK (0) job log log
2020/02/08 21:16	24m	bisect fix	linux-4.14.y	OK (0) job log log

audit: type=1400 audit(1578601437.033:36): avc: denied { map } for pid=7239 comm="syz-executor327" path="/root/syz-executor327922673" 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: null-ptr-deref in memmove include/linux/string.h:362 [inline] BUG: KASAN: null-ptr-deref in scr_memmovew include/linux/vt_buffer.h:68 [inline] BUG: KASAN: null-ptr-deref in insert_char+0xce/0x290 drivers/tty/vt/vt.c:534 Read of size 4294967294 at addr 0000000000000010 by task syz-executor327/7239 CPU: 1 PID: 7239 Comm: syz-executor327 Not tainted 4.14.163-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 kasan_report_error mm/kasan/report.c:349 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0x127/0x2af mm/kasan/report.c:393 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:362 [inline] scr_memmovew include/linux/vt_buffer.h:68 [inline] insert_char+0xce/0x290 drivers/tty/vt/vt.c:534 csi_at drivers/tty/vt/vt.c:1627 [inline] do_con_trol+0x35bd/0x5b40 drivers/tty/vt/vt.c:2074 do_con_write.part.0+0xcc7/0x1b50 drivers/tty/vt/vt.c:2434 do_con_write drivers/tty/vt/vt.c:2205 [inline] con_write+0x38/0xc0 drivers/tty/vt/vt.c:2787 process_output_block drivers/tty/n_tty.c:595 [inline] n_tty_write+0x38b/0xf20 drivers/tty/n_tty.c:2333 do_tty_write drivers/tty/tty_io.c:959 [inline] tty_write+0x3f6/0x700 drivers/tty/tty_io.c:1043 __vfs_write+0x105/0x6b0 fs/read_write.c:480 vfs_write+0x198/0x500 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xfd/0x230 fs/read_write.c:582 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4404f9 RSP: 002b:00007ffc36b28ce8 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 ==================================================================