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kernel_optimize_test/net/netlabel
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Wang Yufen d745512d54 netlabel: fix out-of-bounds memory accesses 
[ Upstream commit f22881de730ebd472e15bcc2c0d1d46e36a87b9c ]

In calipso_map_cat_ntoh(), in the for loop, if the return value of
netlbl_bitmap_walk() is equal to (net_clen_bits - 1), when
netlbl_bitmap_walk() is called next time, out-of-bounds memory accesses
of bitmap[byte_offset] occurs.

The bug was found during fuzzing. The following is the fuzzing report
 BUG: KASAN: slab-out-of-bounds in netlbl_bitmap_walk+0x3c/0xd0
 Read of size 1 at addr ffffff8107bf6f70 by task err_OH/252

 CPU: 7 PID: 252 Comm: err_OH Not tainted 5.17.0-rc7+ #17
 Hardware name: linux,dummy-virt (DT)
 Call trace:
  dump_backtrace+0x21c/0x230
  show_stack+0x1c/0x60
  dump_stack_lvl+0x64/0x7c
  print_address_description.constprop.0+0x70/0x2d0
  __kasan_report+0x158/0x16c
  kasan_report+0x74/0x120
  __asan_load1+0x80/0xa0
  netlbl_bitmap_walk+0x3c/0xd0
  calipso_opt_getattr+0x1a8/0x230
  calipso_sock_getattr+0x218/0x340
  calipso_sock_getattr+0x44/0x60
  netlbl_sock_getattr+0x44/0x80
  selinux_netlbl_socket_setsockopt+0x138/0x170
  selinux_socket_setsockopt+0x4c/0x60
  security_socket_setsockopt+0x4c/0x90
  __sys_setsockopt+0xbc/0x2b0
  __arm64_sys_setsockopt+0x6c/0x84
  invoke_syscall+0x64/0x190
  el0_svc_common.constprop.0+0x88/0x200
  do_el0_svc+0x88/0xa0
  el0_svc+0x128/0x1b0
  el0t_64_sync_handler+0x9c/0x120
  el0t_64_sync+0x16c/0x170

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-13 21:01:00 +02:00
..
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netlabel_addrlist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlabel_addrlist.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlabel_calipso.c genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
netlabel_calipso.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlabel_cipso_v4.c net: fix NULL pointer reference in cipso_v4_doi_free 2021-09-18 13:40:35 +02:00
netlabel_cipso_v4.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlabel_domainhash.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
netlabel_domainhash.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlabel_kapi.c netlabel: fix out-of-bounds memory accesses 2022-04-13 21:01:00 +02:00
netlabel_mgmt.c netlabel: Fix memory leak in netlbl_mgmt_add_common 2021-07-14 16:56:22 +02:00
netlabel_mgmt.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlabel_unlabeled.c netlabel: fix an uninitialized warning in netlbl_unlabel_staticlist() 2020-11-14 12:07:57 -08:00
netlabel_unlabeled.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlabel_user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlabel_user.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00