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Filename Latest commit message Latest commit date
John Fastabend 6d7c51075f bpf: skmsg, fix potential psock NULL pointer dereference
commit 8163999db445021f2651a8a47b5632483e8722ea upstream.

Report from Dan Carpenter,

 net/core/skmsg.c:792 sk_psock_write_space()
 error: we previously assumed 'psock' could be null (see line 790)

 net/core/skmsg.c
   789 psock = sk_psock(sk);
   790 if (likely(psock && sk_psock_test_state(psock, SK_PSOCK_TX_ENABLED)))
 Check for NULL
   791 schedule_work(&psock->work);
   792 write_space = psock->saved_write_space;
                     ^^^^^^^^^^^^^^^^^^^^^^^^
   793          rcu_read_unlock();
   794          write_space(sk);

Ensure psock dereference on line 792 only occurs if psock is not null.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 604326b41a ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-17 19:48:40 +01:00
arch syscalls/x86: Fix function types in COND_SYSCALL 2020-01-17 19:48:31 +01:00
block fs: move guard_bio_eod() after bio_set_op_attrs 2020-01-17 19:48:21 +01:00
certs
crypto KEYS: asymmetric: return ENOMEM if akcipher_request_alloc() fails 2019-12-31 16:46:07 +01:00
Documentation ASoC: dt-bindings: mt8183: add missing update 2020-01-17 19:48:33 +01:00
drivers RDMA/srpt: Report the SCSI residual to the initiator 2020-01-17 19:48:40 +01:00
fs btrfs: simplify inode locking for RWF_NOWAIT 2020-01-17 19:48:32 +01:00
include uaccess: Add non-pagefault user-space write function 2020-01-17 19:48:40 +01:00
init
ipc
kernel bpf: Make use of probe_user_write in probe write helper 2020-01-17 19:48:40 +01:00
lib sbitmap: only queue kyber's wait callback if not already active 2020-01-12 12:21:44 +01:00
LICENSES
mm uaccess: Add non-pagefault user-space write function 2020-01-17 19:48:40 +01:00
net bpf: skmsg, fix potential psock NULL pointer dereference 2020-01-17 19:48:40 +01:00
samples samples: bpf: fix syscall_tp due to unused syscall 2020-01-12 12:21:26 +01:00
scripts scripts: package: mkdebian: add missing rsync dependency 2020-01-12 12:21:35 +01:00
security apparmor: fix aa_xattrs_match() may sleep while holding a RCU lock 2020-01-09 10:20:00 +01:00
sound ASoC: rsnd: fix DALIGN register for SSIU 2020-01-17 19:48:35 +01:00
tools perf vendor events s390: Remove name from L1D_RO_EXCL_WRITES description 2020-01-17 19:48:30 +01:00
usr gen_initramfs_list.sh: fix 'bad variable name' error 2020-01-09 10:20:00 +01:00
virt KVM: arm/arm64: Properly handle faulting of device mappings 2019-12-31 16:46:24 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: Append missed file to the database 2020-01-17 19:48:28 +01:00
Makefile Linux 5.4.12 2020-01-14 20:08:40 +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.