CVE-2024-56677

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-56677
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56677.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-56677
Downstream
Related
Published
2024-12-28T10:15:08Z
Modified
2025-07-29T11:15:52.476924Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

powerpc/fadump: Move fadumpcmainit to setuparch() after initmeminit()

During early init CMAMINALIGNMENTBYTES can be PAGESIZE, since pageblockorder is still zero and it gets initialized later during initmeminit() e.g. setuparch() -> initmeminit() -> sparseinit() -> setpageblock_order()

One such use case where this causes issue is - earlysetup() -> earlyinitdevtree() -> fadumpreservemem() -> fadumpcma_init()

This causes CMA memory alignment check to be bypassed in cmainitreservedmem(). Then later cmaactivatearea() can hit a VMBUGONPAGE(pfn & ((1 << order) - 1)) if the reserved memory area was not pageblock_order aligned.

Fix it by moving the fadumpcmainit() after initmem_init(), where other such cma reservations also gets called.

<stack trace>

page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10010 flags: 0x13ffff800000000(node=1|zone=0|lastcpupid=0x7ffff) CMA raw: 013ffff800000000 5deadbeef0000100 5deadbeef0000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: VMBUGONPAGE(pfn & ((1 << order) - 1)) ------------[ cut here ]------------ kernel BUG at mm/pagealloc.c:778!

Call Trace: _freeonepage+0x57c/0x7b0 (unreliable) freepcppagesbulk+0x1a8/0x2c8 freeunrefpagecommit+0x3d4/0x4e4 freeunrefpage+0x458/0x6d0 initcmareservedpageblock+0x114/0x198 cmainitreservedareas+0x270/0x3e0 dooneinitcall+0x80/0x2f8 kernelinitfreeable+0x33c/0x530 kernelinit+0x34/0x26c retfromkerneluser_thread+0x14/0x1c

References

Affected packages

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.123-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
6.1.106-1
6.1.106-2
6.1.106-3
6.1.112-1
6.1.115-1
6.1.119-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.12.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:11 / linux-6.1

Package

Name
linux-6.1
Purl
pkg:deb/debian/linux-6.1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.128-1~deb11u1

Affected versions

6.*

6.1.106-3~deb11u1
6.1.106-3~deb11u2
6.1.106-3~deb11u3
6.1.112-1~deb11u1
6.1.119-1~deb11u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}