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Filename Latest commit message Latest commit date
Leon Romanovsky 5eb5d9c659 RDMA/core: Don't infoleak GRH fields
commit b35a0f4dd544eaa6162b6d2f13a2557a121ae5fd upstream.

If dst->is_global field is not set, the GRH fields are not cleared
and the following infoleak is reported.

=====================================================
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_user+0x1c9/0x270 lib/usercopy.c:33
 instrument_copy_to_user include/linux/instrumented.h:121 [inline]
 _copy_to_user+0x1c9/0x270 lib/usercopy.c:33
 copy_to_user include/linux/uaccess.h:209 [inline]
 ucma_init_qp_attr+0x8c7/0xb10 drivers/infiniband/core/ucma.c:1242
 ucma_write+0x637/0x6c0 drivers/infiniband/core/ucma.c:1732
 vfs_write+0x8ce/0x2030 fs/read_write.c:588
 ksys_write+0x28b/0x510 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __ia32_sys_write+0xdb/0x120 fs/read_write.c:652
 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]
 __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180
 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

Local variable resp created at:
 ucma_init_qp_attr+0xa4/0xb10 drivers/infiniband/core/ucma.c:1214
 ucma_write+0x637/0x6c0 drivers/infiniband/core/ucma.c:1732

Bytes 40-59 of 144 are uninitialized
Memory access of size 144 starts at ffff888167523b00
Data copied to user address 0000000020000100

CPU: 1 PID: 25910 Comm: syz-executor.1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================

Fixes: 4ba66093bd ("IB/core: Check for global flag when using ah_attr")
Link: https://lore.kernel.org/r/0e9dd51f93410b7b2f4f5562f52befc878b71afa.1641298868.git.leonro@nvidia.com
Reported-by: syzbot+6d532fa8f9463da290bc@syzkaller.appspotmail.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-01-11 15:23:31 +01:00
arch ARM: 9169/1: entry: fix Thumb2 bug in iWMMXt exception handling 2021-12-29 12:23:37 +01:00
block block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2) 2021-12-14 14:49:02 +01:00
certs certs: Trigger creation of RSA module signing key if it's not an RSA key 2021-09-15 09:47:29 +02:00
crypto crypto: pcrypt - Delay write to padata->info 2021-11-17 09:48:40 +01:00
Documentation Input: i8042 - add deferred probe support 2022-01-05 12:37:43 +01:00
drivers RDMA/core: Don't infoleak GRH fields 2022-01-11 15:23:31 +01:00
fs f2fs: quota: fix potential deadlock 2022-01-11 15:23:30 +01:00
include uapi: fix linux/nfc.h userspace compilation errors 2022-01-05 12:37:45 +01:00
init
ipc shm: extend forced shm destroy to support objects from several IPC nses 2021-12-01 09:23:35 +01:00
kernel tracing: Tag trace_percpu_buffer as a percpu pointer 2022-01-11 15:23:31 +01:00
lib siphash: use _unaligned version by default 2021-12-08 09:01:12 +01:00
LICENSES
mm mm: mempolicy: fix THP allocations escaping mempolicy restrictions 2021-12-29 12:23:37 +01:00
net net: fix use-after-free in tw_timer_handler 2022-01-05 12:37:46 +01:00
samples samples/kretprobes: Fix return value if register_kretprobe() failed 2021-11-17 09:48:39 +01:00
scripts recordmcount.pl: fix typo in s390 mcount regex 2022-01-05 12:37:44 +01:00
security selinux: initialize proto variable in selinux_ip_postroute_compat() 2022-01-05 12:37:44 +01:00
sound ALSA: hda/realtek: Amp init fixup for HP ZBook 15 G6 2021-12-29 12:23:36 +01:00
tools selftests: x86: fix [-Wstringop-overread] warn in test_process_vm_readv() 2022-01-11 15:23:31 +01:00
usr
virt KVM: do not shrink halt_poll_ns below grow_start 2021-10-09 14:39:50 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
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Kconfig
MAINTAINERS
Makefile Linux 5.4.170 2022-01-05 12:37:46 +01:00
README

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
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.