In the Linux kernel, the following vulnerability has been resolved:
f2fs: vm_unmap_ram() may be called from an invalid context
When testing F2FS with xfstests using UFS backed virtual disks the
kernel complains sometimes that f2fs_release_decomp_mem() calls
vm_unmap_ram() from an invalid context. Example trace from
f2fs/007 test:
f2fs/007 5s ... [12:59:38][ 8.902525] run fstests f2fs/007
[ 11.468026] BUG: sleeping function called from invalid context at mm/vmalloc.c:2978
[ 11.471849] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 68, name: irq/22-ufshcd
[ 11.475357] preempt_count: 1, expected: 0
[ 11.476970] RCU nest depth: 0, expected: 0
[ 11.478531] CPU: 0 UID: 0 PID: 68 Comm: irq/22-ufshcd Tainted: G W 6.16.0-rc5-xfstests-ufs-g40f92e79b0aa #9 PREEMPT(none)
[ 11.478535] Tainted: [W]=WARN
[ 11.478536] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 11.478537] Call Trace:
[ 11.478543] <TASK>
[ 11.478545] dump_stack_lvl+0x4e/0x70
[ 11.478554] __might_resched.cold+0xaf/0xbe
[ 11.478557] vm_unmap_ram+0x21/0xb0
[ 11.478560] f2fs_release_decomp_mem+0x59/0x80
[ 11.478563] f2fs_free_dic+0x18/0x1a0
[ 11.478565] f2fs_finish_read_bio+0xd7/0x290
[ 11.478570] blk_update_request+0xec/0x3b0
[ 11.478574] ? sbitmap_queue_clear+0x3b/0x60
[ 11.478576] scsi_end_request+0x27/0x1a0
[ 11.478582] scsi_io_completion+0x40/0x300
[ 11.478583] ufshcd_mcq_poll_cqe_lock+0xa3/0xe0
[ 11.478588] ufshcd_sl_intr+0x194/0x1f0
[ 11.478592] ufshcd_threaded_intr+0x68/0xb0
[ 11.478594] ? __pfx_irq_thread_fn+0x10/0x10
[ 11.478599] irq_thread_fn+0x20/0x60
[ 11.478602] ? __pfx_irq_thread_fn+0x10/0x10
[ 11.478603] irq_thread+0xb9/0x180
[ 11.478605] ? __pfx_irq_thread_dtor+0x10/0x10
[ 11.478607] ? __pfx_irq_thread+0x10/0x10
[ 11.478609] kthread+0x10a/0x230
[ 11.478614] ? __pfx_kthread+0x10/0x10
[ 11.478615] ret_from_fork+0x7e/0xd0
[ 11.478619] ? __pfx_kthread+0x10/0x10
[ 11.478621] ret_from_fork_asm+0x1a/0x30
[ 11.478623] </TASK>
This patch modifies in_task() check inside f2fs_read_end_io() to also
check if interrupts are disabled. This ensures that pages are unmapped
asynchronously in an interrupt handler.
References
Configurations
Configuration 1 (hide)
|
Configuration 2 (hide)
|
History
07 Jan 2026, 21:46
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/08a7efc5b02a0620ae16aa9584060e980a69cb55 - Patch | |
| References | () https://git.kernel.org/stable/c/0fe7976b62546f1e95eebfe9879925e9aa22b7a8 - Patch | |
| References | () https://git.kernel.org/stable/c/1023836d1b9465593c8746f97d608da32958785f - Patch | |
| References | () https://git.kernel.org/stable/c/18eea36f4f460ead3750ed4afe5496f7ce55f99e - Patch | |
| References | () https://git.kernel.org/stable/c/411e00f44e2e1a7fdb526013b25a7f0ed22a0947 - Patch | |
| References | () https://git.kernel.org/stable/c/eb69e69a5ae6c8350957893b5f68bd55b1565fb2 - Patch | |
| References | () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - Third Party Advisory | |
| CWE | NVD-CWE-noinfo | |
| CPE | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux
Debian Debian debian Linux Linux linux Kernel |
03 Nov 2025, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
07 Sep 2025, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-07 16:15
Updated : 2026-01-07 21:46
NVD link : CVE-2025-39731
Mitre link : CVE-2025-39731
CVE.ORG link : CVE-2025-39731
JSON object : View
Products Affected
debian
- debian_linux
linux
- linux_kernel
CWE