Vasily Gorbik 399b4e062f s390/topology: avoid firing events before kobjs are created ... commit f3122a79a1b0a113d3aea748e0ec26f2cb2889de upstream. arch_update_cpu_topology is first called from: kernel_init_freeable->sched_init_smp->sched_init_domains even before cpus has been registered in: kernel_init_freeable->do_one_initcall->s390_smp_init Do not trigger kobject_uevent change events until cpu devices are actually created. Fixes the following kasan findings: BUG: KASAN: global-out-of-bounds in kobject_uevent_env+0xb40/0xee0 Read of size 8 at addr 0000000000000020 by task swapper/0/1 BUG: KASAN: global-out-of-bounds in kobject_uevent_env+0xb36/0xee0 Read of size 8 at addr 0000000000000018 by task swapper/0/1 CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B Hardware name: IBM 3906 M04 704 (LPAR) Call Trace: ([<0000000143c6db7e>] show_stack+0x14e/0x1a8) [<0000000145956498>] dump_stack+0x1d0/0x218 [<000000014429fb4c>] print_address_description+0x64/0x380 [<000000014429f630>] __kasan_report+0x138/0x168 [<0000000145960b96>] kobject_uevent_env+0xb36/0xee0 [<0000000143c7c47c>] arch_update_cpu_topology+0x104/0x108 [<0000000143df9e22>] sched_init_domains+0x62/0xe8 [<000000014644c94a>] sched_init_smp+0x3a/0xc0 [<0000000146433a20>] kernel_init_freeable+0x558/0x958 [<000000014599002a>] kernel_init+0x22/0x160 [<00000001459a71d4>] ret_from_fork+0x28/0x30 [<00000001459a71dc>] kernel_thread_starter+0x0/0x10 Cc: stable@vger.kernel.org Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-10-17 13:40:52 -07:00
..
appldata
boot	s390/decompressor: fix initrd corruption caused by bss clear	2017-04-12 12:38:34 +02:00
configs
crypto	s390/crypto: unlock on error in prng_tdes_read()	2017-01-12 11:22:49 +01:00
hypfs	hypfs: Fix error number left in struct pointer member	2019-10-07 21:01:02 +02:00
include	s390: fix stfle zero padding	2019-07-21 09:07:15 +02:00
kernel	s390/topology: avoid firing events before kobjs are created	2019-10-17 13:40:52 -07:00
kvm	KVM: s390: Test for bad access register and size at the start of S390_MEM_OP	2019-10-17 13:40:52 -07:00
lib	s390/lib: use expoline for all bcr instructions	2018-09-15 09:40:42 +02:00
mm	mm: replace get_user_pages_unlocked() write/force parameters with gup_flags	2018-12-17 21:55:16 +01:00
net	s390/bpf: use 32-bit index for tail calls	2019-09-21 07:12:49 +02:00
numa	s390/mm: Fix ERROR: "__node_distance" undefined!	2018-11-27 16:08:01 +01:00
oprofile
pci	s390/pci: fix out of bounds access during irq setup	2018-09-05 09:18:40 +02:00
defconfig
Kbuild
Kconfig	s390: add sysfs attributes for spectre	2018-04-29 07:50:04 +02:00
Kconfig.debug
Makefile	s390: add automatic detection of the spectre defense	2018-04-29 07:50:04 +02:00