bisecting fixing commit since dc4ba5be1babd3b3ec905751a30df89a5899a7a9
building syzkaller on 8eda0b957e5b39c0c525e74f51d6b39ab8c5b1ac
testing commit dc4ba5be1babd3b3ec905751a30df89a5899a7a9 with gcc (GCC) 8.1.0
kernel signature: 0ca2ba5d70912e117b08799bc00e2f70ac6d44971b7a79eceed5e299a903e5bf
all runs: crashed: BUG: unable to handle kernel paging request in do_con_trol
testing current HEAD 3fc898571b974f9a05e4e5c1fe17b18548207091
testing commit 3fc898571b974f9a05e4e5c1fe17b18548207091 with gcc (GCC) 8.1.0
kernel signature: 5ab6c9391acc3a96a4921e9797f9775a71a0a5861b6d27786ee6ea9faeff8dbb
all runs: crashed: BUG: unable to handle kernel paging request in do_con_trol
revisions tested: 2, total time: 24m9.950698575s (build: 17m6.952040129s, test: 6m8.289673221s)
the crash still happens on HEAD
commit msg: Linux 4.19.128
crash: BUG: unable to handle kernel paging request in do_con_trol
batman_adv: batadv0: Interface activated: batadv_slave_1
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
BUG: unable to handle kernel paging request at 000000010000000e
PGD 8d6c5067 P4D 8d6c5067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7862 Comm: syz-executor.3 Not tainted 4.19.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:43 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_K drivers/tty/vt/vt.c:1589 [inline]
RIP: 0010:do_con_trol+0x28e2/0x6360 drivers/tty/vt/vt.c:2381
Code: 0f 8e e4 20 00 00 4c 8b b5 10 ff ff ff 48 63 db 44 89 e1 48 01 db 41 0f b7 81 c8 03 00 00 81 e1 ff ff ff 7f 49 01 de 4c 89 f7 <f3> 66 ab 49 8d b9 78 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a
RSP: 0018:ffff88808d12f768 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 1ffff11011fc64a9 RSI: dffffc0000000000 RDI: 000000010000000e
RBP: ffff88808d12f888 R08: 0000000000000000 R09: ffff88808fe32180
R10: ffffed1015d64732 R11: 000000000000004b R12: 0000000000000001
R13: 1ffff11011a25ef4 R14: 000000010000000e R15: ffff88808fe3250c
FS:  00007fab8f19f700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 0000000091c92000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_con_write.part.21+0xad0/0x1aa0 drivers/tty/vt/vt.c:2803
 do_con_write drivers/tty/vt/vt.c:2571 [inline]
 con_write+0x1f/0x80 drivers/tty/vt/vt.c:3138
 process_output_block drivers/tty/n_tty.c:593 [inline]
 n_tty_write+0x4a4/0x1060 drivers/tty/n_tty.c:2331
 do_tty_write drivers/tty/tty_io.c:960 [inline]
 tty_write+0x346/0x770 drivers/tty/tty_io.c:1044
 __vfs_write+0xe3/0x890 fs/read_write.c:485
 vfs_write+0x150/0x4d0 fs/read_write.c:549
 ksys_write+0x103/0x260 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+0x6e/0xb0 fs/read_write.c:608
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b349
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fab8f19ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fab8f19f6d4 RCX: 000000000045b349
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000c79 R14: 00000000004cd5f6 R15: 000000000075bf2c
Modules linked in:
CR2: 000000010000000e
---[ end trace 1c45a71897968b20 ]---
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:43 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_K drivers/tty/vt/vt.c:1589 [inline]
RIP: 0010:do_con_trol+0x28e2/0x6360 drivers/tty/vt/vt.c:2381
Code: 0f 8e e4 20 00 00 4c 8b b5 10 ff ff ff 48 63 db 44 89 e1 48 01 db 41 0f b7 81 c8 03 00 00 81 e1 ff ff ff 7f 49 01 de 4c 89 f7 <f3> 66 ab 49 8d b9 78 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a
RSP: 0018:ffff88808d12f768 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 1ffff11011fc64a9 RSI: dffffc0000000000 RDI: 000000010000000e
RBP: ffff88808d12f888 R08: 0000000000000000 R09: ffff88808fe32180
R10: ffffed1015d64732 R11: 000000000000004b R12: 0000000000000001
R13: 1ffff11011a25ef4 R14: 000000010000000e R15: ffff88808fe3250c
FS:  00007fab8f19f700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 0000000091c92000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400