ARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses
Since commit a4d5613c4dc6 ("arm: extend pfn_valid to take into account
freed memory map alignment") changes the semantics of pfn_valid() to check
presence of the memory map for a PFN. A valid page for an address which
is reserved but not mapped by the kernel[1], the system crashed during
some uio test with the following memory layout:
node 0: [mem 0x00000000c0a00000-0x00000000cc8fffff]
node 0: [mem 0x00000000d0000000-0x00000000da1fffff]
the uio layout is:0xc0900000, 0x100000
the crash backtrace like:
Unable to handle kernel paging request at virtual address bff00000
[...]
CPU: 1 PID: 465 Comm: startapp.bin Tainted: G O 5.10.0 #1
Hardware name: Generic DT based system
PC is at b15_flush_kern_dcache_area+0x24/0x3c
LR is at __sync_icache_dcache+0x6c/0x98
[...]
(b15_flush_kern_dcache_area) from (__sync_icache_dcache+0x6c/0x98)
(__sync_icache_dcache) from (set_pte_at+0x28/0x54)
(set_pte_at) from (remap_pfn_range+0x1a0/0x274)
(remap_pfn_range) from (uio_mmap+0x184/0x1b8 [uio])
(uio_mmap [uio]) from (__mmap_region+0x264/0x5f4)
(__mmap_region) from (__do_mmap_mm+0x3ec/0x440)
(__do_mmap_mm) from (do_mmap+0x50/0x58)
(do_mmap) from (vm_mmap_pgoff+0xfc/0x188)
(vm_mmap_pgoff) from (ksys_mmap_pgoff+0xac/0xc4)
(ksys_mmap_pgoff) from (ret_fast_syscall+0x0/0x5c)
Code: e0801001 e2423001 e1c00003 f57ff04f (ee070f3e)
---[ end trace 09cf0734c3805d52 ]---
Kernel panic - not syncing: Fatal exception
So check if PG_reserved was set to solve this issue.
[1]: https://lore.kernel.org/lkml/Zbtdue57RO0QScJM@linux.ibm.com/
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Tracking
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| Source | ID | Title |
|---|---|---|
Ubuntu USN |
USN-6816-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6817-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6817-2 | Linux kernel (OEM) vulnerabilities |
Ubuntu USN |
USN-6817-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6878-1 | Linux kernel (Oracle) vulnerabilities |
Ubuntu USN |
USN-7159-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7159-2 | Linux kernel (AWS) vulnerabilities |
Ubuntu USN |
USN-7159-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7159-4 | Linux kernel (IoT) vulnerabilities |
Ubuntu USN |
USN-7166-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7166-2 | Linux kernel (AWS) vulnerabilities |
Ubuntu USN |
USN-7166-3 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-7159-5 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-7166-4 | Linux kernel (Xilinx ZynqMP) vulnerabilities |
Ubuntu USN |
USN-7186-1 | Linux kernel (Intel IoTG) vulnerabilities |
Ubuntu USN |
USN-7186-2 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7194-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-7195-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-7195-2 | Linux kernel (Azure) vulnerabilities |
Thu, 18 Sep 2025 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Linux
Linux linux Kernel |
|
| Weaknesses | NVD-CWE-noinfo | |
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
Thu, 26 Sep 2024 23:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-439 |
Tue, 24 Sep 2024 11:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat enterprise Linux
|
|
| CPEs | cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat enterprise Linux
|
Wed, 07 Aug 2024 22:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/a:redhat:rhel_eus:9.2 |
Wed, 07 Aug 2024 10:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat
Redhat rhel Eus |
|
| CPEs | cpe:/a:redhat:rhel_eus:9.2::nfv | |
| Vendors & Products |
Redhat
Redhat rhel Eus |
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-05-11T20:07:27.597Z
Reserved: 2024-02-19T14:20:24.197Z
Link: CVE-2024-26947
Updated: 2024-08-02T00:21:05.505Z
Status : Analyzed
Published: 2024-05-01T06:15:10.607
Modified: 2025-09-18T14:13:26.613
Link: CVE-2024-26947
OpenCVE Enrichment
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Ubuntu USN