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Filename Latest commit message Latest commit date
Eric Dumazet 4ed347901f net_sched: avoid shift-out-of-bounds in tcindex_set_parms()
commit bcd0cf19ef8258ac31b9a20248b05c15a1f4b4b0 upstream.

tc_index being 16bit wide, we need to check that TCA_TCINDEX_SHIFT
attribute is not silly.

UBSAN: shift-out-of-bounds in net/sched/cls_tcindex.c:260:29
shift exponent 255 is too large for 32-bit type 'int'
CPU: 0 PID: 8516 Comm: syz-executor228 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148
 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:395
 valid_perfect_hash net/sched/cls_tcindex.c:260 [inline]
 tcindex_set_parms.cold+0x1b/0x215 net/sched/cls_tcindex.c:425
 tcindex_change+0x232/0x340 net/sched/cls_tcindex.c:546
 tc_new_tfilter+0x13fb/0x21b0 net/sched/cls_api.c:2127
 rtnetlink_rcv_msg+0x8b6/0xb80 net/core/rtnetlink.c:5555
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x907/0xe40 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2336
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2390
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2423
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Link: https://lore.kernel.org/r/20210114185229.1742255-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-27 11:47:54 +01:00
arch sh: dma: fix kconfig dependency for G2_DMA 2021-01-27 11:47:52 +01:00
block bfq: Fix computation of shallow depth 2021-01-19 18:26:15 +01:00
certs
crypto
Documentation x86/xen: Add xen_no_vector_callback option to test PCI INTX delivery 2021-01-27 11:47:45 +01:00
drivers lightnvm: fix memory leak when submit fails 2021-01-27 11:47:53 +01:00
fs cifs: do not fail __smb_send_rqst if non-fatal signals are pending 2021-01-27 11:47:49 +01:00
include xen: Fix event channel callback via INTX/GSI 2021-01-27 11:47:44 +01:00
init
ipc
kernel bpf: Fix helper bpf_map_peek_elem_proto pointing to wrong callback 2021-01-23 15:57:56 +01:00
lib lib/raid6: Let $(UNROLL) rules work with macOS userland 2021-01-19 18:26:15 +01:00
LICENSES
mm kasan: fix incorrect arguments passing in kasan_add_zero_shadow 2021-01-27 11:47:53 +01:00
net net_sched: avoid shift-out-of-bounds in tcindex_set_parms() 2021-01-27 11:47:54 +01:00
samples
scripts
security dump_common_audit_data(): fix racy accesses to ->d_name 2021-01-19 18:26:16 +01:00
sound ASoC: Intel: haswell: Add missing pm_ops 2021-01-27 11:47:42 +01:00
tools selftests: net: fib_tests: remove duplicate log test 2021-01-27 11:47:48 +01:00
usr
virt kvm: check tlbs_dirty directly 2021-01-12 20:16:22 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.92 2021-01-23 15:58:01 +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.