From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 193041] New: iSCSI initiator: mkfs.ext4 + mount triggers kernel
oops
Date: Sat, 21 Jan 2017 00:06:13 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=193041
Bug ID: 193041
Summary: iSCSI initiator: mkfs.ext4 + mount triggers kernel
oops
Product: IO/Storage
Version: 2.5
Kernel Version: v4.10-rc4
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: SCSI
Assignee: linux-scsi@vger.kernel.org
Reporter: bvanassche@acm.org
Regression: No
Created attachment 252661
--> https://bugzilla.kernel.org/attachment.cgi?id=252661&action=edit
netconsole output
The following command sequence worked with previous kernels but triggers a
kernel oops with kernel v4.10-rc4:
./restart-lio-iscsi
iscsiadm -m discovery -t st -p localhost
iscsiadm -m node -p localhost -l
mkfs.ext4 /dev/sda
mount /dev/sda /mnt
gdb translates the crash address into the following:
$ gdb ./drivers/scsi/iscsi_tcp.ko
(gdb) list *(iscsi_sw_tcp_xmit_segment+0x84)
0xf54 is in iscsi_sw_tcp_xmit_segment (drivers/scsi/iscsi_tcp.c:272).
267 struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
268 struct socket *sk = tcp_sw_conn->sock;
269 unsigned int copied = 0;
270 int r = 0;
271
272 while (!iscsi_tcp_segment_done(tcp_conn, segment, 0, r)) {
273 struct scatterlist *sg;
274 unsigned int offset, copy;
275 int flags = 0;
276
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