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Alan Stern 0ced12bdf6 USB: usbtmc: Fix direction for 0-length ioctl control messages 
commit 94d25e9128 upstream.

The syzbot fuzzer found a problem in the usbtmc driver: When a user
submits an ioctl for a 0-length control transfer, the driver does not
check that the direction is set to OUT:

------------[ cut here ]------------
usb 3-1: BOGUS control dir, pipe 80000b80 doesn't match bRequestType fd
WARNING: CPU: 0 PID: 5100 at drivers/usb/core/urb.c:411 usb_submit_urb+0x14a7/0x1880 drivers/usb/core/urb.c:411
Modules linked in:
CPU: 0 PID: 5100 Comm: syz-executor428 Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:usb_submit_urb+0x14a7/0x1880 drivers/usb/core/urb.c:411
Code: 7c 24 40 e8 1b 13 5c fb 48 8b 7c 24 40 e8 21 1d f0 fe 45 89 e8 44 89 f1 4c 89 e2 48 89 c6 48 c7 c7 e0 b5 fc 8a e8 19 c8 23 fb <0f> 0b e9 9f ee ff ff e8 ed 12 5c fb 0f b6 1d 12 8a 3c 08 31 ff 41
RSP: 0018:ffffc90003d2fb00 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880789e9058 RCX: 0000000000000000
RDX: ffff888029593b80 RSI: ffffffff814c1447 RDI: 0000000000000001
RBP: ffff88801ea742f8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802915e528
R13: 00000000000000fd R14: 0000000080000b80 R15: ffff8880222b3100
FS:  0000555556ca63c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ef4d18150 CR3: 0000000073e5b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 usb_start_wait_urb+0x101/0x4b0 drivers/usb/core/message.c:58
 usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
 usb_control_msg+0x320/0x4a0 drivers/usb/core/message.c:153
 usbtmc_ioctl_request drivers/usb/class/usbtmc.c:1954 [inline]
 usbtmc_ioctl+0x1b3d/0x2840 drivers/usb/class/usbtmc.c:2097

To fix this, we must override the direction in the bRequestType field
of the control request structure when the length is 0.

Reported-and-tested-by: syzbot+ce77725b89b7bd52425c@syzkaller.appspotmail.com
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/linux-usb/000000000000716a3705f9adb8ee@google.com/
CC: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/ede1ee02-b718-49e7-a44c-51339fec706b@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-05-24 17:32:48 +01:00
arch parisc: Replace regular spinlock with spin_trylock on panic path 2023-05-24 17:32:42 +01:00
block block, bfq: Fix division by zero error on zero wsum 2023-05-24 17:32:38 +01:00
certs
crypto crypto: jitter - permanent and intermittent health errors 2023-05-24 17:32:38 +01:00
Documentation dt-bindings: display/msm: dsi-controller-main: Document qcom, master-dsi and qcom, sync-dual-dsi 2023-05-24 17:32:43 +01:00
drivers USB: usbtmc: Fix direction for 0-length ioctl control messages 2023-05-24 17:32:48 +01:00
fs f2fs: fix to check readonly condition correctly 2023-05-24 17:32:38 +01:00
include SUNRPC: always free ctxt when freeing deferred request 2023-05-24 17:32:45 +01:00
init
io_uring
ipc
kernel bpf: Add preempt_count_{sub,add} into btf id deny list 2023-05-24 17:32:38 +01:00
lib lib: cpu_rmap: Avoid use after free on rmap->obj array entries 2023-05-24 17:32:37 +01:00
LICENSES
mm mm/mempolicy: correctly update prev when policy is equal on mbind 2023-05-11 23:03:41 +09:00
net bridge: always declare tunnel functions 2023-05-24 17:32:48 +01:00
rust
samples samples/bpf: Fix fout leak in hbm's run_bpf_prog 2023-05-24 17:32:38 +01:00
scripts recordmcount: Fix memory leaks in the uwrite function 2023-05-24 17:32:41 +01:00
security
sound ALSA: usb-audio: Add a sample rate workaround for Line6 Pod Go 2023-05-24 17:32:48 +01:00
tools net: selftests: Fix optstring 2023-05-24 17:32:48 +01:00
usr
virt
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.cocciconfig
.get_maintainer.ignore
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.rustfmt.toml
COPYING
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Kbuild
Kconfig
MAINTAINERS platform/x86: Move existing HP drivers to a new hp subdir 2023-05-24 17:32:42 +01:00
Makefile Linux 6.1.29 2023-05-17 11:54:00 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
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Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.