general protection fault in selinux_socket_sendmsg

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11aaff83900000
kernel config: https://syzkaller.appspot.com/x/.config?x=3990958d85b55e59
dashboard link: https://syzkaller.appspot.com/bug?extid=f728811dddf8a78ac760
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1314f367900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13f76f87900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f72881...@syzkaller.appspotmail.com

vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
vhci_hcd: vhci_device speed not set
vhci_hcd: stop threads
vhci_hcd vhci_hcd.0: pdev(3) rhport(1) sockfd(3)
general protection fault: 0000 [#1] PREEMPT SMP KASAN
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
Modules linked in:
usb 15-1: new full-speed USB device number 2 using vhci_hcd
CPU: 0 PID: 7780 Comm: vhci_tx Not tainted 4.14.198-syzkaller #0
vhci_hcd: sendmsg failed!, ret=-32 for 48
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a4e48440 task.stack: ffff888088df8000
RIP: 0010:selinux_socket_sendmsg+0x70/0x260 security/selinux/hooks.c:4628
RSP: 0018:ffff888088dffae8 EFLAGS: 00010202
vhci_hcd vhci_hcd.0: pdev(5) rhport(0) sockfd(3)
RAX: 0000000000000004 RBX: 1ffff110111bff5d RCX: 0000000000000001
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
RDX: 0000000000000000 RSI: ffff888088dffd80 RDI: 0000000000000020
vhci_hcd vhci_hcd.0: port 1 already used
RBP: 0000000000000000 R08: 0000000000000030 R09: ffffed10111bffab
R10: ffff888088dffd5f R11: 0000000000058071 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888088dffd80 R15: 0000000000000030
FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004d4310 CR3: 000000008ea88000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vhci_hcd: cannot find a urb of seqnum 0 max seqnum 1
security_socket_sendmsg+0x76/0xb0 security/security.c:1378
sock_sendmsg+0x3f/0x100 net/socket.c:653
vhci_hcd vhci_hcd.0: port 0 already used
vhci_send_cmd_submit+0x510/0xdd0 drivers/usb/usbip/vhci_tx.c:153
vhci_hcd vhci_hcd.0: pdev(5) rhport(1) sockfd(3)
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
usb 13-1: new full-speed USB device number 2 using vhci_hcd
vhci_hcd: sendmsg failed!, ret=-32 for 48
vhci_tx_loop+0x9d/0x260 drivers/usb/usbip/vhci_tx.c:257
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: c7 00 f1 f1 f1 f1 c7 40 08 f2 f2 f2 f2 c7 40 10 00 00 00 f3 c7 40 14 f3 f3 f3 f3 e8 fb 1e 91 fe 48 8d 7d 20 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 b9 01 00 00 48
vhci_hcd: connection closed
b8 00 00 00 00 00 fc ff df
RIP: selinux_socket_sendmsg+0x70/0x260 security/selinux/hooks.c:4628 RSP: ffff888088dffae8
ieee80211 phy13: Selected rate control algorithm 'minstrel_ht'
vhci_hcd vhci_hcd.0: port 0 already used
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd: release socket
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy13: hwaddr 02:00:00:00:0d:00 registered
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd: disconnect device
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd: cannot find a urb of seqnum 0 max seqnum 1
vhci_hcd: cannot find a urb of seqnum 0 max seqnum 1
ieee80211 phy13: mac80211_hwsim_start
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy12: mac80211_hwsim_config (freq=2412(2412 - 0)/noht idle=0 ps=0 smps=static)
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd: stop threads
vhci_hcd: release socket
vhci_hcd: disconnect device
vhci_hcd: stop threads
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3)
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy13: mac80211_hwsim_add_interface (type=1 mac_addr=02:00:00:00:0d:00)
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd: release socket
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy12: mac80211_hwsim_config (freq=2412(2412 - 0)/noht idle=0 ps=0 smps=static)
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy13: mac80211_hwsim_bss_info_changed(changed=0xe vif->addr=02:00:00:00:0d:00)
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd: disconnect device
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy13: ERP_CTS_PROT: 0
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy13: ERP_PREAMBLE: 0
vhci_hcd: stop threads
vhci_hcd: release socket
ieee80211 phy12: mac80211_hwsim_bss_info_changed(changed=0x40000 vif->addr=02:00:00:00:0c:00)
vhci_hcd: disconnect device
ieee80211 phy13: ERP_SLOT: 0
ieee80211 phy13: mac80211_hwsim_conf_tx (queue=0 txop=47 cw_min=3 cw_max=7 aifs=2)
ieee80211 phy12: TX Power: 20 dBm
ieee80211 phy13: mac80211_hwsim_conf_tx (queue=1 txop=94 cw_min=7 cw_max=15 aifs=2)
vhci_hcd: connection closed
vhci_hcd vhci_hcd.0: pdev(0) rhport(1) sockfd(3)
vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3)
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd: stop threads
ieee80211 phy12: mac80211_hwsim_bss_info_changed(changed=0x4000 vif->addr=02:00:00:00:0c:00)
vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3)
vhci_hcd: release socket
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy13: mac80211_hwsim_conf_tx (queue=2 txop=0 cw_min=15 cw_max=1023 aifs=3)
ieee80211 phy12: mac80211_hwsim_conf_tx (queue=0 txop=0 cw_min=15 cw_max=1023 aifs=2)
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd: cannot find a urb of seqnum 0 max seqnum 1
vhci_hcd: disconnect device
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy12: mac80211_hwsim_conf_tx (queue=1 txop=0 cw_min=15 cw_max=1023 aifs=2)
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd: stop threads
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy13: mac80211_hwsim_conf_tx (queue=3 txop=0 cw_min=15 cw_max=1023 aifs=7)
vhci_hcd: connection closed
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd vhci_hcd.0: pdev(2) rhport(1) sockfd(3)
vhci_hcd: release socket
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd: connection closed
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy12: mac80211_hwsim_conf_tx (queue=2 txop=0 cw_min=15 cw_max=1023 aifs=2)
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy13: mac80211_hwsim_bss_info_changed(changed=0x2000 vif->addr=02:00:00:00:0d:00)
vhci_hcd: connection closed
vhci_hcd: disconnect device
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy12: mac80211_hwsim_conf_tx (queue=3 txop=0 cw_min=15 cw_max=1023 aifs=2)
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd: stop threads
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy13: mac80211_hwsim_config (freq=2412(2412 - 0)/noht idle=1 ps=0 smps=static)
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd: release socket
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd: disconnect device
ieee80211 phy13: mac80211_hwsim_configure_filter
vhci_hcd vhci_hcd.0: port 1 already used
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy13: mac80211_hwsim_configure_filter
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy12: mac80211_hwsim_bss_info_changed(changed=0x2000 vif->addr=02:00:00:00:0c:00)
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy13: mac80211_hwsim_bss_info_changed(changed=0x10 vif->addr=02:00:00:00:0d:00)
vhci_hcd: stop threads
vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(3)
vhci_hcd: release socket
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy12: mac80211_hwsim_bss_info_changed(changed=0x8bfe vif->addr=02:00:00:00:0c:00)
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy13: HT: op_mode=0xb
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd: disconnect device
ieee80211 phy12: mac80211_hwsim_bss_info_changed: BSSID changed: 50:50:50:50:50:50
vhci_hcd vhci_hcd.0: port 1 already used
ieee80211 phy12: BCN EN: 1 (BI=100)
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
---[ end trace 688efbbb0732312e ]---
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
vhci_hcd: stop threads
vhci_hcd: connection closed
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd: release socket
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 0 already used
ieee80211 phy12: ERP_CTS_PROT: 0
vhci_hcd: disconnect device
ieee80211 phy13: mac80211_hwsim_config (freq=2412(2412 - 0)/noht idle=0 ps=0 smps=static)


---
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[syzbot]

syzbot suspects this issue was fixed by commit:

commit 534d2cf487b972b2c039bfc55898a7edc2b0ea45
Author: Shuah Khan <sk...@linuxfoundation.org>
Date: Tue Mar 30 01:36:51 2021 +0000

usbip: synchronize event handler with sysfs code paths

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16a5f45dd00000
start commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y

kernel config: https://syzkaller.appspot.com/x/.config?x=3990958d85b55e59
dashboard link: https://syzkaller.appspot.com/bug?extid=f728811dddf8a78ac760

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1314f367900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13f76f87900000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: usbip: synchronize event handler with sysfs code paths

For information about bisection process see: https://goo.gl/tpsmEJ#bisection