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Alexey Dobriyan 391e982bfa module: fix [e_shstrndx].sh_size=0 OOB access 
It is trivial to craft a module to trigger OOB access in this line:

	if (info->secstrings[strhdr->sh_size - 1] != '\0') {

BUG: unable to handle page fault for address: ffffc90000aa0fff
PGD 100000067 P4D 100000067 PUD 100066067 PMD 10436f067 PTE 0
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 7 PID: 1215 Comm: insmod Not tainted 5.18.0-rc5-00007-g9bf578647087-dirty #10
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-4.fc34 04/01/2014
RIP: 0010:load_module+0x19b/0x2391

Fixes: ec2a29593c ("module: harden ELF info handling")
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
[rebased patch onto modules-next]
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
2022-05-12 10:29:41 -07:00
..
debug_kmemleak.c module: Move kmemleak support to a separate file 2022-04-05 08:43:04 -07:00
decompress.c module: Make internal.h and decompress.c more compliant 2022-04-05 08:42:35 -07:00
internal.h module: Introduce module unload taint tracking 2022-05-12 10:29:41 -07:00
kallsyms.c module: Introduce data_layout 2022-04-05 08:43:05 -07:00
kdb.c module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC 2022-04-05 08:43:05 -07:00
livepatch.c module: Move livepatch support to a separate file 2022-04-05 08:43:04 -07:00
main.c module: fix [e_shstrndx].sh_size=0 OOB access 2022-05-12 10:29:41 -07:00
Makefile module: Introduce module unload taint tracking 2022-05-12 10:29:41 -07:00
procfs.c module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC 2022-04-05 08:43:05 -07:00
signing.c module: Move extra signature support out of core code 2022-04-05 08:43:04 -07:00
strict_rwx.c module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC 2022-04-05 08:43:05 -07:00
sysfs.c module: Move sysfs support into a separate file 2022-04-05 08:43:04 -07:00
tracking.c module: Introduce module unload taint tracking 2022-05-12 10:29:41 -07:00
tree_lookup.c module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC 2022-04-05 08:43:05 -07:00
version.c module: Move version support into a separate file 2022-04-05 08:43:04 -07:00