23 Jan, 2019
2 commits
-
[ Upstream commit ed076c55b359cc9982ca8b065bcc01675f7365f6 ]
In case of arp failure call cxgbit_put_csk() to free csk.
Signed-off-by: Varun Prakash
Signed-off-by: Martin K. Petersen
Signed-off-by: Sasha Levin -
This reverts commit b831528038e3cad0d745c53bcaeedb642f5cbc1f.
A wrong commit message was used for the stable commit because of a human
error (and duplicate commit subject lines).This patch reverts this error, and the following patches add the two
upstream commits.Signed-off-by: Sasha Levin
13 Jan, 2019
2 commits
-
[ Upstream commit 9e6371d3c6913ff1707fb2c0274c9925f7aaef80 ]
Add missing spin_lock_init() for cdev->np_lock.
Signed-off-by: Varun Prakash
Signed-off-by: Martin K. Petersen
Signed-off-by: Sasha Levin -
[ Upstream commit 801df68d617e3cb831f531c99fa6003620e6b343 ]
csk leak can happen if a new TCP connection gets established after
cxgbit_accept_np() returns, to fix this leak free remaining csk in
cxgbit_free_np().Signed-off-by: Varun Prakash
Signed-off-by: Martin K. Petersen
Signed-off-by: Sasha Levin
18 Oct, 2018
1 commit
-
[ Upstream commit 679fcae46c8b2352bba3485d521da070cfbe68e6 ]
Fedora got a bug report of a crash with iSCSI:
kernel BUG at include/linux/scatterlist.h:143!
...
RIP: 0010:iscsit_do_crypto_hash_buf+0x154/0x180 [iscsi_target_mod]
...
Call Trace:
? iscsi_target_tx_thread+0x200/0x200 [iscsi_target_mod]
iscsit_get_rx_pdu+0x4cd/0xa90 [iscsi_target_mod]
? native_sched_clock+0x3e/0xa0
? iscsi_target_tx_thread+0x200/0x200 [iscsi_target_mod]
iscsi_target_rx_thread+0x81/0xf0 [iscsi_target_mod]
kthread+0x120/0x140
? kthread_create_worker_on_cpu+0x70/0x70
ret_from_fork+0x3a/0x50This is a BUG_ON for using a stack buffer with a scatterlist. There
are two cases that trigger this bug. Switch to using a dynamically
allocated buffer for one case and do not assign a NULL buffer in
another case.Signed-off-by: Laura Abbott
Reviewed-by: Mike Christie
Signed-off-by: Martin K. Petersen
Signed-off-by: Sasha Levin
Signed-off-by: Greg Kroah-Hartman
10 Oct, 2018
1 commit
-
[ Upstream commit 7915919bb94e12460c58e27c708472e6f85f6699 ]
Fixes a use-after-free reported by KASAN when later
iscsi_target_login_sess_out gets called and it tries to access
conn->sess->se_sess:Disabling lock debugging due to kernel taint
iSCSI Login timeout on Network Portal [::]:3260
iSCSI Login negotiation failed.
==================================================================
BUG: KASAN: use-after-free in
iscsi_target_login_sess_out.cold.12+0x58/0xff [iscsi_target_mod]
Read of size 8 at addr ffff880109d070c8 by task iscsi_np/980CPU: 1 PID: 980 Comm: iscsi_np Tainted: G O
4.17.8kasan.sess.connops+ #4
Hardware name: To be filled by O.E.M. To be filled by O.E.M./Aptio CRB,
BIOS 5.6.5 05/19/2014
Call Trace:
dump_stack+0x71/0xac
print_address_description+0x65/0x22e
? iscsi_target_login_sess_out.cold.12+0x58/0xff [iscsi_target_mod]
kasan_report.cold.6+0x241/0x2fd
iscsi_target_login_sess_out.cold.12+0x58/0xff [iscsi_target_mod]
iscsi_target_login_thread+0x1086/0x1710 [iscsi_target_mod]
? __sched_text_start+0x8/0x8
? iscsi_target_login_sess_out+0x250/0x250 [iscsi_target_mod]
? __kthread_parkme+0xcc/0x100
? parse_args.cold.14+0xd3/0xd3
? iscsi_target_login_sess_out+0x250/0x250 [iscsi_target_mod]
kthread+0x1a0/0x1c0
? kthread_bind+0x30/0x30
ret_from_fork+0x35/0x40Allocated by task 980:
kasan_kmalloc+0xbf/0xe0
kmem_cache_alloc_trace+0x112/0x210
iscsi_target_login_thread+0x816/0x1710 [iscsi_target_mod]
kthread+0x1a0/0x1c0
ret_from_fork+0x35/0x40Freed by task 980:
__kasan_slab_free+0x125/0x170
kfree+0x90/0x1d0
iscsi_target_login_thread+0x1577/0x1710 [iscsi_target_mod]
kthread+0x1a0/0x1c0
ret_from_fork+0x35/0x40The buggy address belongs to the object at ffff880109d06f00
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 456 bytes inside of
512-byte region [ffff880109d06f00, ffff880109d07100)
The buggy address belongs to the page:
page:ffffea0004274180 count:1 mapcount:0 mapping:0000000000000000
index:0x0 compound_mapcount: 0
flags: 0x17fffc000008100(slab|head)
raw: 017fffc000008100 0000000000000000 0000000000000000 00000001000c000c
raw: dead000000000100 dead000000000200 ffff88011b002e00 0000000000000000
page dumped because: kasan: bad access detectedMemory state around the buggy address:
ffff880109d06f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff880109d07000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff880109d07080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff880109d07100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff880109d07180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================Signed-off-by: Vincent Pelletier
[rebased against idr/ida changes and to handle ret review comments from Matthew]
Signed-off-by: Mike Christie
Cc: Matthew Wilcox
Reviewed-by: Matthew Wilcox
Signed-off-by: Martin K. Petersen
Signed-off-by: Sasha Levin
Signed-off-by: Greg Kroah-Hartman
04 Oct, 2018
1 commit
-
[ Upstream commit 35bea5c84fd13c643cce63f0b5cd4b148f8c901d ]
Fixes: e48354ce078c ("iscsi-target: Add iSCSI fabric support for target v4.1")
Signed-off-by: Bart Van Assche
Reviewed-by: Mike Christie
Cc: Mike Christie
Cc: Christoph Hellwig
Cc: Hannes Reinecke
Signed-off-by: Martin K. Petersen
Signed-off-by: Sasha Levin
Signed-off-by: Greg Kroah-Hartman
29 Sep, 2018
2 commits
-
commit 8c39e2699f8acb2e29782a834e56306da24937fe upstream.
Signed-off-by: Vincent Pelletier
Reviewed-by: Mike Christie
Signed-off-by: Martin K. Petersen
Signed-off-by: Greg Kroah-Hartman -
commit 1816494330a83f2a064499d8ed2797045641f92c upstream.
This change has the following effects, in order of descreasing importance:
1) Prevent a stack buffer overflow
2) Do not append an unnecessary NULL to an anyway binary buffer, which
is writing one byte past client_digest when caller is:
chap_string_to_hex(client_digest, chap_r, strlen(chap_r));The latter was found by KASAN (see below) when input value hes expected size
(32 hex chars), and further analysis revealed a stack buffer overflow can
happen when network-received value is longer, allowing an unauthenticated
remote attacker to smash up to 17 bytes after destination buffer (16 bytes
attacker-controlled and one null). As switching to hex2bin requires
specifying destination buffer length, and does not internally append any null,
it solves both issues.This addresses CVE-2018-14633.
Beyond this:
- Validate received value length and check hex2bin accepted the input, to log
this rejection reason instead of just failing authentication.- Only log received CHAP_R and CHAP_C values once they passed sanity checks.
==================================================================
BUG: KASAN: stack-out-of-bounds in chap_string_to_hex+0x32/0x60 [iscsi_target_mod]
Write of size 1 at addr ffff8801090ef7c8 by task kworker/0:0/1021CPU: 0 PID: 1021 Comm: kworker/0:0 Tainted: G O 4.17.8kasan.sess.connops+ #2
Hardware name: To be filled by O.E.M. To be filled by O.E.M./Aptio CRB, BIOS 5.6.5 05/19/2014
Workqueue: events iscsi_target_do_login_rx [iscsi_target_mod]
Call Trace:
dump_stack+0x71/0xac
print_address_description+0x65/0x22e
? chap_string_to_hex+0x32/0x60 [iscsi_target_mod]
kasan_report.cold.6+0x241/0x2fd
chap_string_to_hex+0x32/0x60 [iscsi_target_mod]
chap_server_compute_md5.isra.2+0x2cb/0x860 [iscsi_target_mod]
? chap_binaryhex_to_asciihex.constprop.5+0x50/0x50 [iscsi_target_mod]
? ftrace_caller_op_ptr+0xe/0xe
? __orc_find+0x6f/0xc0
? unwind_next_frame+0x231/0x850
? kthread+0x1a0/0x1c0
? ret_from_fork+0x35/0x40
? ret_from_fork+0x35/0x40
? iscsi_target_do_login_rx+0x3bc/0x4c0 [iscsi_target_mod]
? deref_stack_reg+0xd0/0xd0
? iscsi_target_do_login_rx+0x3bc/0x4c0 [iscsi_target_mod]
? is_module_text_address+0xa/0x11
? kernel_text_address+0x4c/0x110
? __save_stack_trace+0x82/0x100
? ret_from_fork+0x35/0x40
? save_stack+0x8c/0xb0
? 0xffffffffc1660000
? iscsi_target_do_login+0x155/0x8d0 [iscsi_target_mod]
? iscsi_target_do_login_rx+0x3bc/0x4c0 [iscsi_target_mod]
? process_one_work+0x35c/0x640
? worker_thread+0x66/0x5d0
? kthread+0x1a0/0x1c0
? ret_from_fork+0x35/0x40
? iscsi_update_param_value+0x80/0x80 [iscsi_target_mod]
? iscsit_release_cmd+0x170/0x170 [iscsi_target_mod]
chap_main_loop+0x172/0x570 [iscsi_target_mod]
? chap_server_compute_md5.isra.2+0x860/0x860 [iscsi_target_mod]
? rx_data+0xd6/0x120 [iscsi_target_mod]
? iscsit_print_session_params+0xd0/0xd0 [iscsi_target_mod]
? cyc2ns_read_begin.part.2+0x90/0x90
? _raw_spin_lock_irqsave+0x25/0x50
? memcmp+0x45/0x70
iscsi_target_do_login+0x875/0x8d0 [iscsi_target_mod]
? iscsi_target_check_first_request.isra.5+0x1a0/0x1a0 [iscsi_target_mod]
? del_timer+0xe0/0xe0
? memset+0x1f/0x40
? flush_sigqueue+0x29/0xd0
iscsi_target_do_login_rx+0x3bc/0x4c0 [iscsi_target_mod]
? iscsi_target_nego_release+0x80/0x80 [iscsi_target_mod]
? iscsi_target_restore_sock_callbacks+0x130/0x130 [iscsi_target_mod]
process_one_work+0x35c/0x640
worker_thread+0x66/0x5d0
? flush_rcu_work+0x40/0x40
kthread+0x1a0/0x1c0
? kthread_bind+0x30/0x30
ret_from_fork+0x35/0x40The buggy address belongs to the page:
page:ffffea0004243bc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x17fffc000000000()
raw: 017fffc000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: ffffea0004243c20 ffffea0004243ba0 0000000000000000 0000000000000000
page dumped because: kasan: bad access detectedMemory state around the buggy address:
ffff8801090ef680: f2 f2 f2 f2 f2 f2 f2 01 f2 f2 f2 f2 f2 f2 f2 00
ffff8801090ef700: f2 f2 f2 f2 f2 f2 f2 00 02 f2 f2 f2 f2 f2 f2 00
>ffff8801090ef780: 00 f2 f2 f2 f2 f2 f2 00 00 f2 f2 f2 f2 f2 f2 00
^
ffff8801090ef800: 00 f2 f2 f2 f2 f2 f2 00 00 00 00 02 f2 f2 f2 f2
ffff8801090ef880: f2 f2 f2 00 00 00 00 00 00 00 00 f2 f2 f2 f2 00
==================================================================Signed-off-by: Vincent Pelletier
Reviewed-by: Mike Christie
Signed-off-by: Martin K. Petersen
Signed-off-by: Greg Kroah-Hartman
05 Sep, 2018
2 commits
-
commit 26abc916a898d34c5ad159315a2f683def3c5555 upstream.
The problem is that iscsi_login_zero_tsih_s1 sets conn->sess early in
iscsi_login_set_conn_values. If the function fails later like when we
alloc the idr it does kfree(sess) and leaves the conn->sess pointer set.
iscsi_login_zero_tsih_s1 then returns -Exyz and we then call
iscsi_target_login_sess_out and access the freed memory.This patch has iscsi_login_zero_tsih_s1 either completely setup the
session or completely tear it down, so later in
iscsi_target_login_sess_out we can just check for it being set to the
connection.Cc: stable@vger.kernel.org
Fixes: 0957627a9960 ("iscsi-target: Fix sess allocation leak in...")
Signed-off-by: Mike Christie
Acked-by: Martin K. Petersen
Signed-off-by: Matthew Wilcox
Signed-off-by: Greg Kroah-Hartman -
[ Upstream commit 1b350ea0c2f4df9aa30426614c8eb755a8c32814 ]
- rounddown CXGBIT_MAX_ISO_PAYLOAD by csk->emss before calculating
max_iso_npdu to get max TCP payload in multiple of mss.- call cxgbit_set_digest() before cxgbit_set_iso_npdu() to set
csk->submode, it is used in calculating number of iso pdus.Signed-off-by: Varun Prakash
Reviewed-by: Mike Christie
Signed-off-by: Martin K. Petersen
Signed-off-by: Sasha Levin
Signed-off-by: Greg Kroah-Hartman
22 Feb, 2018
2 commits
-
commit 1c130ae00b769a2e2df41bad3d6051ee8234b636 upstream.
Mike Christie reports:
Starting in 4.14 iscsi logins will fail around 50% of the time.Problem appears to be that iscsi_target_sk_data_ready() callback may
return without doing anything in case it finds the login work queue
is still blocked in sock_recvmsg().Nicholas Bellinger says:
It would indicate users providing their own ->sk_data_ready() callback
must be responsible for waking up a kthread context blocked on
sock_recvmsg(..., MSG_WAITALL), when a second ->sk_data_ready() is
received before the first sock_recvmsg(..., MSG_WAITALL) completes.So, do this and invoke the original data_ready() callback -- in
case of tcp sockets this takes care of waking the thread.Disclaimer: I do not understand why this problem did not show up before
tcp prequeue removal.(Drop WARN_ON usage - nab)
Reported-by: Mike Christie
Bisected-by: Mike Christie
Tested-by: Mike Christie
Diagnosed-by: Nicholas Bellinger
Fixes: e7942d0633c4 ("tcp: remove prequeue support")
Signed-off-by: Florian Westphal
Cc: stable@vger.kernel.org # 4.14+
Signed-off-by: Nicholas Bellinger
Signed-off-by: Greg Kroah-Hartman -
commit ce512d79d0466a604793addb6b769d12ee326822 upstream.
If chap_server_compute_md5() fails early, e.g. via CHAP_N mismatch, then
crypto_free_shash() is called with a NULL pointer which gets
dereferenced in crypto_shash_tfm().Fixes: 69110e3cedbb ("iscsi-target: Use shash and ahash")
Suggested-by: Markus Elfring
Signed-off-by: David Disseldorp
Cc: stable@vger.kernel.org # 4.6+
Signed-off-by: Nicholas Bellinger
Signed-off-by: Greg Kroah-Hartman
20 Dec, 2017
3 commits
-
[ Upstream commit 12d5a43b2dffb6cd28062b4e19024f7982393288 ]
tpg must free when call core_tpg_register() return fail
Signed-off-by: tangwenji
Signed-off-by: Nicholas Bellinger
Signed-off-by: Sasha Levin
Signed-off-by: Greg Kroah-Hartman -
[ Upstream commit cfe2b621bb18d86e93271febf8c6e37622da2d14 ]
Avoid that cmd->se_cmd.se_tfo is read after a command has already been
freed.Signed-off-by: Bart Van Assche
Cc: Christoph Hellwig
Cc: Mike Christie
Reviewed-by: Hannes Reinecke
Signed-off-by: Nicholas Bellinger
Signed-off-by: Sasha Levin
Signed-off-by: Greg Kroah-Hartman -
[ Upstream commit 6eaf69e4ec075f5af236c0c89f75639a195db904 ]
Certain behavior of the initiator can cause the target driver to
send both a reject and a SCSI response. If that happens two
target_put_sess_cmd() calls will occur without the command having
been removed from conn_cmd_list. In other words, conn_cmd_list
will get corrupted once the freed memory is reused. Although the
Linux kernel can detect list corruption if list debugging is
enabled, in this case the context in which list corruption is
detected is not related to the context that caused list corruption.
Hence add WARN_ON() statements that report the context that is
causing list corruption.Signed-off-by: Bart Van Assche
Cc: Christoph Hellwig
Cc: Mike Christie
Reviewed-by: Hannes Reinecke
Signed-off-by: Nicholas Bellinger
Signed-off-by: Sasha Levin
Signed-off-by: Greg Kroah-Hartman
30 Nov, 2017
2 commits
-
commit 3fc9fb13a4b2576aeab86c62fd64eb29ab68659c upstream.
This patch fixes a se_cmd->cmd_kref reference leak that can
occur when a non immediate TMR is proceeded our of command
sequence number order, and CMDSN_LOWER_THAN_EXP is returned
by iscsit_sequence_cmd().To address this bug, call target_put_sess_cmd() during this
special case following what iscsit_process_scsi_cmd() does
upon CMDSN_LOWER_THAN_EXP.Cc: Mike Christie
Cc: Hannes Reinecke
Signed-off-by: Nicholas Bellinger
Signed-off-by: Greg Kroah-Hartman -
commit ae072726f6109bb1c94841d6fb3a82dde298ea85 upstream.
Since commit 59b6986dbf fixed a potential NULL pointer dereference
by allocating a se_tmr_req for ISCSI_TM_FUNC_TASK_REASSIGN, the
se_tmr_req is currently leaked by iscsit_free_cmd() because no
iscsi_cmd->se_cmd.se_tfo was associated.To address this, treat ISCSI_TM_FUNC_TASK_REASSIGN like any other
TMR and call transport_init_se_cmd() + target_get_sess_cmd() to
setup iscsi_cmd->se_cmd.se_tfo with se_cmd->cmd_kref of 2.This will ensure normal release operation once se_cmd->cmd_kref
reaches zero and target_release_cmd_kref() is invoked, se_tmr_req
will be released via existing target_free_cmd_mem() and
core_tmr_release_req() code.Reported-by: Donald White
Cc: Donald White
Cc: Mike Christie
Cc: Hannes Reinecke
Signed-off-by: Nicholas Bellinger
Signed-off-by: Greg Kroah-Hartman
02 Nov, 2017
1 commit
-
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
07 Aug, 2017
1 commit
-
This patch fixes a bug associated with iscsit_reset_np_thread()
that can occur during parallel configfs rmdir of a single iscsi_np
used across multiple iscsi-target instances, that would result in
hung task(s) similar to below where configfs rmdir process context
was blocked indefinately waiting for iscsi_np->np_restart_comp
to finish:[ 6726.112076] INFO: task dcp_proxy_node_:15550 blocked for more than 120 seconds.
[ 6726.119440] Tainted: G W O 4.1.26-3321 #2
[ 6726.125045] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 6726.132927] dcp_proxy_node_ D ffff8803f202bc88 0 15550 1 0x00000000
[ 6726.140058] ffff8803f202bc88 ffff88085c64d960 ffff88083b3b1ad0 ffff88087fffeb08
[ 6726.147593] ffff8803f202c000 7fffffffffffffff ffff88083f459c28 ffff88083b3b1ad0
[ 6726.155132] ffff88035373c100 ffff8803f202bca8 ffffffff8168ced2 ffff8803f202bcb8
[ 6726.162667] Call Trace:
[ 6726.165150] [] schedule+0x32/0x80
[ 6726.170156] [] schedule_timeout+0x214/0x290
[ 6726.176030] [] ? __send_signal+0x52/0x4a0
[ 6726.181728] [] wait_for_completion+0x96/0x100
[ 6726.187774] [] ? wake_up_state+0x10/0x10
[ 6726.193395] [] iscsit_reset_np_thread+0x62/0xe0 [iscsi_target_mod]
[ 6726.201278] [] iscsit_tpg_disable_portal_group+0x96/0x190 [iscsi_target_mod]
[ 6726.210033] [] lio_target_tpg_store_enable+0x4f/0xc0 [iscsi_target_mod]
[ 6726.218351] [] configfs_write_file+0xaa/0x110
[ 6726.224392] [] vfs_write+0xa4/0x1b0
[ 6726.229576] [] SyS_write+0x41/0xb0
[ 6726.234659] [] system_call_fastpath+0x12/0x71It would happen because each iscsit_reset_np_thread() sets state
to ISCSI_NP_THREAD_RESET, sends SIGINT, and then blocks waiting
for completion on iscsi_np->np_restart_comp.However, if iscsi_np was active processing a login request and
more than a single iscsit_reset_np_thread() caller to the same
iscsi_np was blocked on iscsi_np->np_restart_comp, iscsi_np
kthread process context in __iscsi_target_login_thread() would
flush pending signals and only perform a single completion of
np->np_restart_comp before going back to sleep within transport
specific iscsit_transport->iscsi_accept_np code.To address this bug, add a iscsi_np->np_reset_count and update
__iscsi_target_login_thread() to keep completing np->np_restart_comp
until ->np_reset_count has reached zero.Reported-by: Gary Guo
Tested-by: Gary Guo
Cc: Mike Christie
Cc: Hannes Reinecke
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Nicholas Bellinger
31 Jul, 2017
4 commits
-
The current logic of calculating sg_nents can fail
if data_offset % PAGE_SIZE is not zero.For example -
PAGE_SIZE = 4096
data_len = 3072
data_offset = 3072As per current logic
sg_nents = max(1UL, DIV_ROUND_UP(data_len, PAGE_SIZE));
sg_nents = max(1UL, DIV_ROUND_UP(3072, 4096));
sg_nents = 1But as data_offset % PAGE_SIZE = 3072 we should skip 3072 bytes
skip = 3K
sg_nents = max(1UL, DIV_ROUND_UP(3K(skip) + 3K(data_len), 4K(PAGE_SIZE));
sg_nents = 2;This patch fixes this issue by adding skip to data_len.
Signed-off-by: Varun Prakash
Signed-off-by: Nicholas Bellinger -
In case of multiple text responses iscsi-target
sets both 'F' and 'C' bit for the final text response
pdu, this issue happens because hdr->flags is not
zeroed out before ORing with 'F' bit.This patch removes the | operator to fix this issue.
Signed-off-by: Varun Prakash
Signed-off-by: Nicholas Bellinger -
On receiving text request iscsi-target allocates buffer for
payload in iscsit_handle_text_cmd() and assigns buffer pointer
to cmd->text_in_ptr, this buffer is currently freed in
iscsit_release_cmd(), if iscsi-target sets 'C' bit in text
response then it will receive another text request from the
initiator with ttt != 0xffffffff in this case iscsi-target
will find cmd using itt and call iscsit_setup_text_cmd()
which will set cmd->text_in_ptr to NULL without freeing
previously allocated buffer.This patch fixes this issue by calling kfree(cmd->text_in_ptr)
in iscsit_setup_text_cmd() before assigning NULL to it.For the first text request cmd->text_in_ptr is NULL as
cmd is memset to 0 in iscsit_allocate_cmd().Signed-off-by: Varun Prakash
Cc: # 4.0+
Signed-off-by: Nicholas Bellinger -
Call __kfree_skb() after processing skb to avoid
memory leak.Signed-off-by: Varun Prakash
Signed-off-by: Nicholas Bellinger
16 Jul, 2017
1 commit
-
Pull random updates from Ted Ts'o:
"Add wait_for_random_bytes() and get_random_*_wait() functions so that
callers can more safely get random bytes if they can block until the
CRNG is initialized.Also print a warning if get_random_*() is called before the CRNG is
initialized. By default, only one single-line warning will be printed
per boot. If CONFIG_WARN_ALL_UNSEEDED_RANDOM is defined, then a
warning will be printed for each function which tries to get random
bytes before the CRNG is initialized. This can get spammy for certain
architecture types, so it is not enabled by default"* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
random: reorder READ_ONCE() in get_random_uXX
random: suppress spammy warnings about unseeded randomness
random: warn when kernel uses unseeded randomness
net/route: use get_random_int for random counter
net/neighbor: use get_random_u32 for 32-bit hash random
rhashtable: use get_random_u32 for hash_rnd
ceph: ensure RNG is seeded before using
iscsi: ensure RNG is seeded before use
cifs: use get_random_u32 for 32-bit lock random
random: add get_random_{bytes,u32,u64,int,long,once}_wait family
random: add wait_for_random_bytes() API
14 Jul, 2017
1 commit
-
Pull SCSI target updates from Nicholas Bellinger:
"It's been usually busy for summer, with most of the efforts centered
around TCMU developments and various target-core + fabric driver bug
fixing activities. Not particularly large in terms of LoC, but lots of
smaller patches from many different folks.The highlights include:
- ibmvscsis logical partition manager support (Michael Cyr + Bryant
Ly)- Convert target/iblock WRITE_SAME to blkdev_issue_zeroout (hch +
nab)- Add support for TMR percpu LUN reference counting (nab)
- Fix a potential deadlock between EXTENDED_COPY and iscsi shutdown
(Bart)- Fix COMPARE_AND_WRITE caw_sem leak during se_cmd quiesce (Jiang Yi)
- Fix TMCU module removal (Xiubo Li)
- Fix iser-target OOPs during login failure (Andrea Righi + Sagi)
- Breakup target-core free_device backend driver callback (mnc)
- Perform TCMU add/delete/reconfig synchronously (mnc)
- Fix TCMU multiple UIO open/close sequences (mnc)
- Fix TCMU CHECK_CONDITION sense handling (mnc)
- Fix target-core SAM_STAT_BUSY + TASK_SET_FULL handling (mnc + nab)
- Introduce TYPE_ZBC support in PSCSI (Damien Le Moal)
- Fix possible TCMU memory leak + OOPs when recalculating cmd base
size (Xiubo Li + Bryant Ly + Damien Le Moal + mnc)- Add login_keys_workaround attribute for non RFC initiators (Robert
LeBlanc + Arun Easi + nab)"* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (68 commits)
iscsi-target: Add login_keys_workaround attribute for non RFC initiators
Revert "qla2xxx: Fix incorrect tcm_qla2xxx_free_cmd use during TMR ABORT"
tcmu: clean up the code and with one small fix
tcmu: Fix possbile memory leak / OOPs when recalculating cmd base size
target: export lio pgr/alua support as device attr
target: Fix return sense reason in target_scsi3_emulate_pr_out
target: Fix cmd size for PR-OUT in passthrough_parse_cdb
tcmu: Fix dev_config_store
target: pscsi: Introduce TYPE_ZBC support
target: Use macro for WRITE_VERIFY_32 operation codes
target: fix SAM_STAT_BUSY/TASK_SET_FULL handling
target: remove transport_complete
pscsi: finish cmd processing from pscsi_req_done
tcmu: fix sense handling during completion
target: add helper to copy sense to se_cmd buffer
target: do not require a transport_complete for SCF_TRANSPORT_TASK_SENSE
target: make device_mutex and device_list static
tcmu: Fix flushing cmd entry dcache page
tcmu: fix multiple uio open/close sequences
tcmu: drop configured check in destroy
...
12 Jul, 2017
1 commit
-
This patch re-introduces part of a long standing login workaround that
was recently dropped by:commit 1c99de981f30b3e7868b8d20ce5479fa1c0fea46
Author: Nicholas Bellinger
Date: Sun Apr 2 13:36:44 2017 -0700iscsi-target: Drop work-around for legacy GlobalSAN initiator
Namely, the workaround for FirstBurstLength ended up being required by
Mellanox Flexboot PXE boot ROMs as reported by Robert.So this patch re-adds the work-around for FirstBurstLength within
iscsi_check_proposer_for_optional_reply(), and makes the key optional
to respond when the initiator does not propose, nor respond to it.Also as requested by Arun, this patch introduces a new TPG attribute
named 'login_keys_workaround' that controls the use of both the
FirstBurstLength workaround, as well as the two other existing
workarounds for gPXE iSCSI boot client.By default, the workaround is enabled with login_keys_workaround=1,
since Mellanox FlexBoot requires it, and Arun has verified the Qlogic
MSFT initiator already proposes FirstBurstLength, so it's uneffected
by this re-adding this part of the original work-around.Reported-by: Robert LeBlanc
Cc: Robert LeBlanc
Reviewed-by: Arun Easi
Cc: # 3.1+
Signed-off-by: Nicholas Bellinger
07 Jul, 2017
4 commits
-
If an iSCSI command is rejected before iscsit_process_scsi_cmd()
is called, .reject_reason is set but iscsit_process_scsi_cmd() is
not called. This means that the "if (cmd->reject_reason) ..." code
in this function can be removed without changing the behavior of
this function.Signed-off-by: Bart Van Assche
Cc: Hannes Reinecke
Cc: Christoph Hellwig
Cc: Andy Grover
Cc: David Disseldorp
Signed-off-by: Nicholas Bellinger -
Since .se_tfo is only set if a command has been submitted to
the LIO core, check .se_tfo instead of .iscsi_opcode. Since
__iscsit_free_cmd() only affects SCSI commands but not TMFs,
calling that function for TMFs does not change behavior. This
patch does not change the behavior of iscsit_free_cmd().Signed-off-by: Bart Van Assche
Cc: Hannes Reinecke
Cc: Christoph Hellwig
Cc: Andy Grover
Cc: David Disseldorp
Signed-off-by: Nicholas Bellinger -
Initialize .data_direction to DMA_NONE in iscsit_allocate_cmd()
such that the second argument of __iscsit_free_cmd() can be left
out. Note: this patch causes the first part of __iscsit_free_cmd()
no longer to be skipped for TMFs. That's fine since no data
segments are associated with TMFs.Signed-off-by: Bart Van Assche
Reviewed-by: Hannes Reinecke
Cc: Christoph Hellwig
Cc: Andy Grover
Cc: David Disseldorp
Signed-off-by: Nicholas Bellinger -
With commit 25cdda95fda7 in place to address the initial login
PDU asynchronous socket close OOPs, go ahead and kill off the
left-over iscsi_target_do_cleanup() and ->login_cleanup_work.Reported-by: Mike Christie
Cc: Mike Christie
Signed-off-by: Nicholas Bellinger
01 Jul, 2017
1 commit
-
A set of overlapping changes in macvlan and the rocker
driver, nothing serious.Signed-off-by: David S. Miller
21 Jun, 2017
1 commit
-
follow Johannes Berg, semantic patch file as below,
@@
identifier p, p2;
expression len;
expression skb;
type t, t2;
@@
(
-p = __skb_put(skb, len);
+p = __skb_put_zero(skb, len);
|
-p = (t)__skb_put(skb, len);
+p = __skb_put_zero(skb, len);
)
... when != p
(
p2 = (t2)p;
-memset(p2, 0, len);
|
-memset(p, 0, len);
)@@
identifier p;
expression len;
expression skb;
type t;
@@
(
-t p = __skb_put(skb, len);
+t p = __skb_put_zero(skb, len);
)
... when != p
(
-memset(p, 0, len);
)@@
type t, t2;
identifier p, p2;
expression skb;
@@
t *p;
...
(
-p = __skb_put(skb, sizeof(t));
+p = __skb_put_zero(skb, sizeof(t));
|
-p = (t *)__skb_put(skb, sizeof(t));
+p = __skb_put_zero(skb, sizeof(t));
)
... when != p
(
p2 = (t2)p;
-memset(p2, 0, sizeof(*p));
|
-memset(p, 0, sizeof(*p));
)@@
expression skb, len;
@@
-memset(__skb_put(skb, len), 0, len);
+__skb_put_zero(skb, len);@@
expression skb, len, data;
@@
-memcpy(__skb_put(skb, len), data, len);
+__skb_put_data(skb, data, len);@@
expression SKB, C, S;
typedef u8;
identifier fn = {__skb_put};
fresh identifier fn2 = fn ## "_u8";
@@
- *(u8 *)fn(SKB, S) = C;
+ fn2(SKB, C);Signed-off-by: yuan linyu
Signed-off-by: David S. Miller
20 Jun, 2017
1 commit
-
It's not safe to use weak random data here, especially for the challenge
response randomness. Since we're always in process context, it's safe to
simply wait until we have enough randomness to carry out the
authentication correctly.While we're at it, we clean up a small memleak during an error
condition.Signed-off-by: Jason A. Donenfeld
Cc: "Nicholas A. Bellinger"
Cc: Lee Duncan
Cc: Chris Leech
Signed-off-by: Theodore Ts'o
16 Jun, 2017
2 commits
-
It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.Make these functions return void * and remove all the casts across
the tree, adding a (u8 *) cast only where the unsigned char pointer
was used directly, all done with the following spatch:@@
expression SKB, LEN;
typedef u8;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
@@
- *(fn(SKB, LEN))
+ *(u8 *)fn(SKB, LEN)@@
expression E, SKB, LEN;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
type T;
@@
- E = ((T *)(fn(SKB, LEN)))
+ E = fn(SKB, LEN)@@
expression SKB, LEN;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
@@
- fn(SKB, LEN)[0]
+ *(u8 *)fn(SKB, LEN)Note that the last part there converts from push(...)[0] to the
more idiomatic *(u8 *)push(...).Signed-off-by: Johannes Berg
Signed-off-by: David S. Miller -
It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.Make these functions (skb_put, __skb_put and pskb_put) return void *
and remove all the casts across the tree, adding a (u8 *) cast only
where the unsigned char pointer was used directly, all done with the
following spatch:@@
expression SKB, LEN;
typedef u8;
identifier fn = { skb_put, __skb_put };
@@
- *(fn(SKB, LEN))
+ *(u8 *)fn(SKB, LEN)@@
expression E, SKB, LEN;
identifier fn = { skb_put, __skb_put };
type T;
@@
- E = ((T *)(fn(SKB, LEN)))
+ E = fn(SKB, LEN)which actually doesn't cover pskb_put since there are only three
users overall.A handful of stragglers were converted manually, notably a macro in
drivers/isdn/i4l/isdn_bsdcomp.c and, oddly enough, one of the many
instances in net/bluetooth/hci_sock.c. In the former file, I also
had to fix one whitespace problem spatch introduced.Signed-off-by: Johannes Berg
Signed-off-by: David S. Miller
09 Jun, 2017
3 commits
-
As originally reported by Jia-Ju, iscsit_tpg_enable_portal_group()
holds iscsi_portal_group->tpg_state_lock while updating AUTHMETHOD
via iscsi_update_param_value(), which performs a GFP_KERNEL
allocation.However, since iscsit_tpg_enable_portal_group() is already protected
by iscsit_get_tpg() -> iscsi_portal_group->tpg_access_lock in it's
parent caller, ->tpg_state_lock only needs to be held when setting
TPG_STATE_ACTIVE.Reported-by: Jia-Ju Bai
Reviewed-by: Jia-Ju Bai
Signed-off-by: Nicholas Bellinger -
When iscsi WRITE underflow occurs there are two different scenarios
that can happen.Normally in practice, when an EDTL vs. SCSI CDB TRANSFER LENGTH
underflow is detected, the iscsi immediate data payload is the
smaller SCSI CDB TRANSFER LENGTH.That is, when a host fabric LLD is using a fixed size EDTL for
a specific control CDB, the SCSI CDB TRANSFER LENGTH and actual
SCSI payload ends up being smaller than EDTL. In iscsi, this
means the received iscsi immediate data payload matches the
smaller SCSI CDB TRANSFER LENGTH, because there is no more
SCSI payload to accept beyond SCSI CDB TRANSFER LENGTH.However, it's possible for a malicous host to send a WRITE
underflow where EDTL is larger than SCSI CDB TRANSFER LENGTH,
but incoming iscsi immediate data actually matches EDTL.In the wild, we've never had a iscsi host environment actually
try to do this.For this special case, it's wrong to truncate part of the
control CDB payload and continue to process the command during
underflow when immediate data payload received was larger than
SCSI CDB TRANSFER LENGTH, so go ahead and reject and drop the
bogus payload as a defensive action.Note this potential bug was originally relaxed by the following
for allowing WRITE underflow in MSFT FCP host environments:commit c72c5250224d475614a00c1d7e54a67f77cd3410
Author: Roland Dreier
Date: Wed Jul 22 15:08:18 2015 -0700target: allow underflow/overflow for PR OUT etc. commands
Cc: Roland Dreier
Cc: Mike Christie
Cc: Hannes Reinecke
Cc: Martin K. Petersen
Cc: # v4.3+
Signed-off-by: Nicholas Bellinger -
This patch fixes a BUG() in iscsit_close_session() that could be
triggered when iscsit_logout_post_handler() execution from within
tx thread context was not run for more than SECONDS_FOR_LOGOUT_COMP
(15 seconds), and the TCP connection didn't already close before
then forcing tx thread context to automatically exit.This would manifest itself during explicit logout as:
[33206.974254] 1 connection(s) still exist for iSCSI session to iqn.1993-08.org.debian:01:3f5523242179
[33206.980184] INFO: NMI handler (kgdb_nmi_handler) took too long to run: 2100.772 msecs
[33209.078643] ------------[ cut here ]------------
[33209.078646] kernel BUG at drivers/target/iscsi/iscsi_target.c:4346!Normally when explicit logout attempt fails, the tx thread context
exits and iscsit_close_connection() from rx thread context does the
extra cleanup once it detects conn->conn_logout_remove has not been
cleared by the logout type specific post handlers.To address this special case, if the logout post handler in tx thread
context detects conn->tx_thread_active has already been cleared, simply
return and exit in order for existing iscsit_close_connection()
logic from rx thread context do failed logout cleanup.Reported-by: Bart Van Assche
Tested-by: Bart Van Assche
Cc: Mike Christie
Cc: Hannes Reinecke
Cc: Sagi Grimberg
Cc: stable@vger.kernel.org # 3.14+
Tested-by: Gary Guo
Tested-by: Chu Yuan Lin
Signed-off-by: Nicholas Bellinger
08 Jun, 2017
1 commit
-
the adapter consumes two tids for every ipv6 offload
connection be it active or passive, calculate tid usage
count accordingly.Also change the signatures of relevant functions to get
the address family.Signed-off-by: Rizwan Ansari
Signed-off-by: Varun Prakash
Signed-off-by: Ganesh Goudar
Signed-off-by: David S. Miller
