Oliver Hartkopp e7153bf70c can: can_dropped_invalid_skb(): ensure an initialized headroom in outgoing CAN sk_buffs ... KMSAN sysbot detected a read access to an untinitialized value in the headroom of an outgoing CAN related sk_buff. When using CAN sockets this area is filled appropriately - but when using a packet socket this initialization is missing. The problematic read access occurs in the CAN receive path which can only be triggered when the sk_buff is sent through a (virtual) CAN interface. So we check in the sending path whether we need to perform the missing initializations. Fixes: d3b58c47d3 ("can: replace timestamp as unique skb attribute") Reported-by: syzbot+b02ff0707a97e4e79ebb@syzkaller.appspotmail.com Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Tested-by: Oliver Hartkopp <socketcan@hartkopp.net> Cc: linux-stable <stable@vger.kernel.org> # >= v4.1 Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>		2020-01-02 15:34:27 +01:00
..
acpi
asm-generic	powerpc updates for 5.5 #2	2019-12-06 13:36:31 -08:00
clocksource
crypto
drm	mm + drm coherent memory support for vmwgfx	2019-11-30 09:38:11 -08:00
dt-bindings	ARM: Device-tree updates	2019-12-05 12:09:47 -08:00
keys	powerpc updates for 5.5	2019-11-30 14:35:43 -08:00
kunit
kvm
linux	can: can_dropped_invalid_skb(): ensure an initialized headroom in outgoing CAN sk_buffs	2020-01-02 15:34:27 +01:00
math-emu
media	drm main pull for 5.5-rc1	2019-11-27 17:45:48 -08:00
misc
net	net/sched: add delete_empty() to filters and use it in cls_flower	2019-12-30 20:35:19 -08:00
pcmcia
ras
rdma	IB/core: Introduce rdma_user_mmap_entry_insert_range() API	2019-12-12 16:55:36 -05:00
scsi
soc	drm msm + fixes for 5.5-rc1	2019-12-06 10:28:09 -08:00
sound	ASoC: Fixes for v5.5	2019-12-17 14:18:32 +01:00
target
trace	This is a relatively quiet cycle for nfsd, mainly various bugfixes.	2019-12-07 16:56:00 -08:00
uapi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-12-22 09:54:33 -08:00
vdso
video
xen	xen/interface: re-define FRONT/BACK_RING_ATTACH()	2019-12-20 13:44:42 +01:00