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e39257cde7
linux/drivers/net/wan
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Eric Dumazet 9eed321cde net: lapbether: only support ethernet devices 
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: 1da177e4c3 ("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>
2023-06-15 08:55:22 +01:00
..
.gitignore
c101.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
farsync.c net: farsync: Fix kmemleak when rmmods farsync 2022-12-12 09:42:45 +00:00
farsync.h WAN: Fix syntax errors in comments 2022-06-07 10:45:25 +02:00
fsl_ucc_hdlc.c net: Use of_property_read_bool() for boolean properties 2023-03-16 17:41:28 +00:00
fsl_ucc_hdlc.h
hd64570.c
hd64570.h
hd64572.c net: wan: switch to netif_napi_add_weight() 2022-05-08 11:33:57 +01:00
hd64572.h
hdlc_cisco.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
hdlc_fr.c net: hldc_fr: use dev_addr_set() 2021-10-22 10:16:18 -07:00
hdlc_ppp.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
hdlc_raw_eth.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
hdlc_raw.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
hdlc_x25.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
hdlc.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
ixp4xx_hss.c net: wan: switch to netif_napi_add_weight() 2022-05-08 11:33:57 +01:00
Kconfig net: wan: remove support for Z85230-based devices 2022-04-27 12:22:56 +01:00
lapbether.c net: lapbether: only support ethernet devices 2023-06-15 08:55:22 +01:00
Makefile net: wan: remove support for Z85230-based devices 2022-04-27 12:22:56 +01:00
n2.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
pc300too.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
pci200syn.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
slic_ds26522.c net: Replace all spi->chip_select and spi->cs_gpiod references with function call 2023-03-11 12:34:02 +00:00
slic_ds26522.h
wanxl.c net: split out ndo_siowandev ioctl 2021-07-27 20:11:45 +01:00
wanxl.h
wanxlfw.inc_shipped
wanxlfw.S