Hello,
syzbot found the following crash on:
HEAD commit: fb683b5e Linux 4.19.88
git tree: linux-4.19.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=10a5781ee00000
kernel config:
https://syzkaller.appspot.com/x/.config?x=aa0c39a6a0078b1c
dashboard link:
https://syzkaller.appspot.com/bug?extid=69b47ab1682bdd85bee5
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by:
syzbot+69b47a...@syzkaller.appspotmail.com
BUG: unable to handle kernel paging request at 000000010000000e
PGD 7b201067 P4D 7b201067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 15677 Comm: syz-executor.4 Not tainted 4.19.88-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:1559 [inline]
RIP: 0010:do_con_trol+0x39e6/0x6070 drivers/tty/vt/vt.c:2351
Code: 08 2c 01 0f 8e 81 13 00 00 4c 8b bd 08 ff ff ff 48 63 db 44 89 e9 41
0f b7 84 24 c8 03 00 00 48 01 db d1 e9 49 01 df 4c 89 ff <f3> 66 ab 49 8d
bc 24 78 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0
RSP: 0018:ffff88807c3b7780 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 1ffff11009eca589 RSI: ffffffff83aedde9 RDI: 000000010000000e
RBP: ffff88807c3b78a0 R08: ffff888058ca6000 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: ffff88804f652880
R13: 0000000000000002 R14: 0000000000000001 R15: 000000010000000e
FS: 00007f52dc44a700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 000000009f247000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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+0x3f9/0x10f0 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: 0033:0x45a6f9
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:00007f52dc449c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a6f9
RDX: 0000000000000078 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f52dc44a6d4
R13: 00000000004cbbaf R14: 00000000004e5858 R15: 00000000ffffffff
Modules linked in:
CR2: 000000010000000e
UBIFS error (pid: 15680): cannot open "udev/nbd0", error -22
---[ end trace f33faad8cb051993 ]---
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:1559 [inline]
RIP: 0010:do_con_trol+0x39e6/0x6070 drivers/tty/vt/vt.c:2351
Code: 08 2c 01 0f 8e 81 13 00 00 4c 8b bd 08 ff ff ff 48 63 db 44 89 e9 41
0f b7 84 24 c8 03 00 00 48 01 db d1 e9 49 01 df 4c 89 ff <f3> 66 ab 49 8d
bc 24 78 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0
RSP: 0018:ffff88807c3b7780 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 1ffff11009eca589 RSI: ffffffff83aedde9 RDI: 000000010000000e
RBP: ffff88807c3b78a0 R08: ffff888058ca6000 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: ffff88804f652880
R13: 0000000000000002 R14: 0000000000000001 R15: 000000010000000e
FS: 00007f52dc44a700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001fff038 CR3: 000000009f247000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
This bug is generated by a bot. It may contain errors.
See
https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at
syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.