Revision 9eed321cde22fc1afd76eac563ce19d899e0d6b2 authored by Eric Dumazet on 14 June 2023, 16:18:02 UTC, committed by David S. Miller on 15 June 2023, 07:55:22 UTC
It probbaly makes no sense to support arbitrary network devices for lapbether. syzbot reported: skbuff: skb_under_panic: text:ffff80008934c100 len:44 put:40 head:ffff0000d18dd200 data:ffff0000d18dd1ea tail:0x16 end:0x140 dev:bond1 kernel BUG at net/core/skbuff.c:200 ! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 5643 Comm: dhcpcd Not tainted 6.4.0-rc5-syzkaller-g4641cff8e810 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : skb_panic net/core/skbuff.c:196 [inline] pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:210 lr : skb_panic net/core/skbuff.c:196 [inline] lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:210 sp : ffff8000973b7260 x29: ffff8000973b7270 x28: ffff8000973b7360 x27: dfff800000000000 x26: ffff0000d85d8150 x25: 0000000000000016 x24: ffff0000d18dd1ea x23: ffff0000d18dd200 x22: 000000000000002c x21: 0000000000000140 x20: 0000000000000028 x19: ffff80008934c100 x18: ffff8000973b68a0 x17: 0000000000000000 x16: ffff80008a43bfbc x15: 0000000000000202 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000000201 x10: 0000000000000000 x9 : f22f7eb937cced00 x8 : f22f7eb937cced00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000973b6b78 x4 : ffff80008df9ee80 x3 : ffff8000805974f4 x2 : 0000000000000001 x1 : 0000000100000201 x0 : 0000000000000086 Call trace: skb_panic net/core/skbuff.c:196 [inline] skb_under_panic+0x13c/0x140 net/core/skbuff.c:210 skb_push+0xf0/0x108 net/core/skbuff.c:2409 ip6gre_header+0xbc/0x738 net/ipv6/ip6_gre.c:1383 dev_hard_header include/linux/netdevice.h:3137 [inline] lapbeth_data_transmit+0x1c4/0x298 drivers/net/wan/lapbether.c:257 lapb_data_transmit+0x8c/0xb0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0x178/0x204 net/lapb/lapb_out.c:149 lapb_send_control+0x220/0x320 net/lapb/lapb_subr.c:251 lapb_establish_data_link+0x94/0xec lapb_device_event+0x348/0x4e0 notifier_call_chain+0x1a4/0x510 kernel/notifier.c:93 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461 __dev_notify_flags+0x2bc/0x544 dev_change_flags+0xd0/0x15c net/core/dev.c:8643 devinet_ioctl+0x858/0x17e4 net/ipv4/devinet.c:1150 inet_ioctl+0x2ac/0x4d8 net/ipv4/af_inet.c:979 sock_do_ioctl+0x134/0x2dc net/socket.c:1201 sock_ioctl+0x4ec/0x858 net/socket.c:1318 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: aa1803e6 aa1903e7 a90023f5 947730f5 (d4210000) Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Martin Schiller <ms@dev.tdt.de> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 7d03646
setlocalversion
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# This scripts adds local version information from the version
# control systems git, mercurial (hg) and subversion (svn).
#
# If something goes wrong, send a mail the kernel build mailinglist
# (see MAINTAINERS) and CC Nico Schottelius
# <nico-linuxsetlocalversion -at- schottelius.org>.
#
#
usage() {
echo "Usage: $0 [--no-local] [srctree]" >&2
exit 1
}
no_local=false
if test "$1" = "--no-local"; then
no_local=true
shift
fi
srctree=.
if test $# -gt 0; then
srctree=$1
shift
fi
if test $# -gt 0 -o ! -d "$srctree"; then
usage
fi
scm_version()
{
local short=false
local no_dirty=false
local tag
while [ $# -gt 0 ];
do
case "$1" in
--short)
short=true;;
--no-dirty)
no_dirty=true;;
esac
shift
done
cd "$srctree"
if test -n "$(git rev-parse --show-cdup 2>/dev/null)"; then
return
fi
if ! head=$(git rev-parse --verify HEAD 2>/dev/null); then
return
fi
# If a localversion*' file and the corresponding annotated tag exist,
# use it. This is the case in linux-next.
tag=${file_localversion#-}
tag=$(git describe --exact-match --match=$tag $tag 2>/dev/null)
# Otherwise, default to the annotated tag derived from KERNELVERSION.
# mainline kernel: 6.2.0-rc5 -> v6.2-rc5
# stable kernel: 6.1.7 -> v6.1.7
if [ -z "${tag}" ]; then
tag=v$(echo "${KERNELVERSION}" | sed -E 's/^([0-9]+\.[0-9]+)\.0(.*)$/\1\2/')
fi
# If we are at the tagged commit, we ignore it because the version is
# well-defined.
if [ -z "$(git describe --exact-match --match=$tag 2>/dev/null)" ]; then
# If only the short version is requested, don't bother
# running further git commands
if $short; then
echo "+"
return
fi
# If we are past the tagged commit, we pretty print it.
# (like 6.1.0-14595-g292a089d78d3)
if atag="$(git describe --match=$tag 2>/dev/null)"; then
echo "$atag" | awk -F- '{printf("-%05d", $(NF-1))}'
fi
# Add -g and exactly 12 hex chars.
printf '%s%s' -g "$(echo $head | cut -c1-12)"
fi
if ${no_dirty}; then
return
fi
# Check for uncommitted changes.
# This script must avoid any write attempt to the source tree, which
# might be read-only.
# You cannot use 'git describe --dirty' because it tries to create
# .git/index.lock .
# First, with git-status, but --no-optional-locks is only supported in
# git >= 2.14, so fall back to git-diff-index if it fails. Note that
# git-diff-index does not refresh the index, so it may give misleading
# results.
# See git-update-index(1), git-diff-index(1), and git-status(1).
if {
git --no-optional-locks status -uno --porcelain 2>/dev/null ||
git diff-index --name-only HEAD
} | read dummy; then
printf '%s' -dirty
fi
}
collect_files()
{
local file res=
for file; do
case "$file" in
*\~*)
continue
;;
esac
if test -e "$file"; then
res="$res$(cat "$file")"
fi
done
echo "$res"
}
if [ -z "${KERNELVERSION}" ]; then
echo "KERNELVERSION is not set" >&2
exit 1
fi
# localversion* files in the build and source directory
file_localversion="$(collect_files localversion*)"
if test ! "$srctree" -ef .; then
file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)"
fi
if ${no_local}; then
echo "${KERNELVERSION}$(scm_version --no-dirty)"
exit 0
fi
if ! test -e include/config/auto.conf; then
echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
exit 1
fi
# version string from CONFIG_LOCALVERSION
config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf)
# scm version string if not at the kernel version tag or at the file_localversion
if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then
# full scm version string
scm_version="$(scm_version)"
elif [ "${LOCALVERSION+set}" != "set" ]; then
# If the variable LOCALVERSION is not set, append a plus
# sign if the repository is not in a clean annotated or
# signed tagged state (as git describe only looks at signed
# or annotated tags - git tag -a/-s).
#
# If the variable LOCALVERSION is set (including being set
# to an empty string), we don't want to append a plus sign.
scm_version="$(scm_version --short)"
fi
echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}"
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