In the Linux kernel, the following vulnerability has been resolved:
mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL
commit a421ef303008 ("mm: allow !GFP_KERNEL allocations for kvmalloc")
includes support for __GFP_NOFAIL, but it presents a conflict with commit
dd544141b9eb ("vmalloc: back off when the current task is OOM-killed"). A
possible scenario is as follows:
process-a
__vmalloc_node_range(GFP_KERNEL | __GFP_NOFAIL)
__vmalloc_area_node()
vm_area_alloc_pages()
--> oom-killer send SIGKILL to process-a
if (fatal_signal_pending(current)) break;
--> return NULL;
To fix this, do not check fatal_signal_pending() in vm_area_alloc_pages()
if __GFP_NOFAIL set.
This issue occurred during OPLUS KASAN TEST. Below is part of the log
-> oom-killer sends signal to process
[65731.222840] [ T1308] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/apps/uid_10198,task=gs.intelligence,pid=32454,uid=10198
[65731.259685] [T32454] Call trace:
[65731.259698] [T32454] dump_backtrace+0xf4/0x118
[65731.259734] [T32454] show_stack+0x18/0x24
[65731.259756] [T32454] dump_stack_lvl+0x60/0x7c
[65731.259781] [T32454] dump_stack+0x18/0x38
[65731.259800] [T32454] mrdump_common_die+0x250/0x39c [mrdump]
[65731.259936] [T32454] ipanic_die+0x20/0x34 [mrdump]
[65731.260019] [T32454] atomic_notifier_call_chain+0xb4/0xfc
[65731.260047] [T32454] notify_die+0x114/0x198
[65731.260073] [T32454] die+0xf4/0x5b4
[65731.260098] [T32454] die_kernel_fault+0x80/0x98
[65731.260124] [T32454] __do_kernel_fault+0x160/0x2a8
[65731.260146] [T32454] do_bad_area+0x68/0x148
[65731.260174] [T32454] do_mem_abort+0x151c/0x1b34
[65731.260204] [T32454] el1_abort+0x3c/0x5c
[65731.260227] [T32454] el1h_64_sync_handler+0x54/0x90
[65731.260248] [T32454] el1h_64_sync+0x68/0x6c
[65731.260269] [T32454] z_erofs_decompress_queue+0x7f0/0x2258
--> be->decompressed_pages = kvcalloc(be->nr_pages, sizeof(struct page *), GFP_KERNEL | __GFP_NOFAIL);
kernel panic by NULL pointer dereference.
erofs assume kvmalloc with __GFP_NOFAIL never return NULL.
[65731.260293] [T32454] z_erofs_runqueue+0xf30/0x104c
[65731.260314] [T32454] z_erofs_readahead+0x4f0/0x968
[65731.260339] [T32454] read_pages+0x170/0xadc
[65731.260364] [T32454] page_cache_ra_unbounded+0x874/0xf30
[65731.260388] [T32454] page_cache_ra_order+0x24c/0x714
[65731.260411] [T32454] filemap_fault+0xbf0/0x1a74
[65731.260437] [T32454] __do_fault+0xd0/0x33c
[65731.260462] [T32454] handle_mm_fault+0xf74/0x3fe0
[65731.260486] [T32454] do_mem_abort+0x54c/0x1b34
[65731.260509] [T32454] el0_da+0x44/0x94
[65731.260531] [T32454] el0t_64_sync_handler+0x98/0xb4
[65731.260553] [T32454] el0t_64_sync+0x198/0x19c
References
| Link | Resource |
|---|---|
| https://git.kernel.org/stable/c/198a80833e3421d4c9820a4ae907120adf598c91 | Mailing List Patch |
| https://git.kernel.org/stable/c/758678b65164b2158fc1de411092191cb3c394d4 | Mailing List Patch |
| https://git.kernel.org/stable/c/8e0545c83d672750632f46e3f9ad95c48c91a0fc | Mailing List Patch |
| https://git.kernel.org/stable/c/c55d3564ad25ce87ab7cc6af251f9574faebd8da | Mailing List Patch |
Configurations
Configuration 1 (hide)
|
History
08 Jul 2024, 17:11
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-770 | |
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/198a80833e3421d4c9820a4ae907120adf598c91 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/758678b65164b2158fc1de411092191cb3c394d4 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/8e0545c83d672750632f46e3f9ad95c48c91a0fc - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/c55d3564ad25ce87ab7cc6af251f9574faebd8da - Mailing List, Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
05 Jul 2024, 12:55
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
|
05 Jul 2024, 07:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-07-05 07:15
Updated : 2024-07-08 17:11
NVD link : CVE-2024-39474
Mitre link : CVE-2024-39474
CVE.ORG link : CVE-2024-39474
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-770
Allocation of Resources Without Limits or Throttling