{"id":"CVE-2025-39731","summary":"f2fs: vm_unmap_ram() may be called from an invalid context","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: vm_unmap_ram() may be called from an invalid context\n\nWhen testing F2FS with xfstests using UFS backed virtual disks the\nkernel complains sometimes that f2fs_release_decomp_mem() calls\nvm_unmap_ram() from an invalid context. Example trace from\nf2fs/007 test:\n\nf2fs/007 5s ...  [12:59:38][    8.902525] run fstests f2fs/007\n[   11.468026] BUG: sleeping function called from invalid context at mm/vmalloc.c:2978\n[   11.471849] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 68, name: irq/22-ufshcd\n[   11.475357] preempt_count: 1, expected: 0\n[   11.476970] RCU nest depth: 0, expected: 0\n[   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)\n[   11.478535] Tainted: [W]=WARN\n[   11.478536] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   11.478537] Call Trace:\n[   11.478543]  \u003cTASK\u003e\n[   11.478545]  dump_stack_lvl+0x4e/0x70\n[   11.478554]  __might_resched.cold+0xaf/0xbe\n[   11.478557]  vm_unmap_ram+0x21/0xb0\n[   11.478560]  f2fs_release_decomp_mem+0x59/0x80\n[   11.478563]  f2fs_free_dic+0x18/0x1a0\n[   11.478565]  f2fs_finish_read_bio+0xd7/0x290\n[   11.478570]  blk_update_request+0xec/0x3b0\n[   11.478574]  ? sbitmap_queue_clear+0x3b/0x60\n[   11.478576]  scsi_end_request+0x27/0x1a0\n[   11.478582]  scsi_io_completion+0x40/0x300\n[   11.478583]  ufshcd_mcq_poll_cqe_lock+0xa3/0xe0\n[   11.478588]  ufshcd_sl_intr+0x194/0x1f0\n[   11.478592]  ufshcd_threaded_intr+0x68/0xb0\n[   11.478594]  ? __pfx_irq_thread_fn+0x10/0x10\n[   11.478599]  irq_thread_fn+0x20/0x60\n[   11.478602]  ? __pfx_irq_thread_fn+0x10/0x10\n[   11.478603]  irq_thread+0xb9/0x180\n[   11.478605]  ? __pfx_irq_thread_dtor+0x10/0x10\n[   11.478607]  ? __pfx_irq_thread+0x10/0x10\n[   11.478609]  kthread+0x10a/0x230\n[   11.478614]  ? __pfx_kthread+0x10/0x10\n[   11.478615]  ret_from_fork+0x7e/0xd0\n[   11.478619]  ? __pfx_kthread+0x10/0x10\n[   11.478621]  ret_from_fork_asm+0x1a/0x30\n[   11.478623]  \u003c/TASK\u003e\n\nThis patch modifies in_task() check inside f2fs_read_end_io() to also\ncheck if interrupts are disabled. This ensures that pages are unmapped\nasynchronously in an interrupt handler.","modified":"2026-03-20T12:43:01.964399Z","published":"2025-09-07T15:16:20.023Z","related":["MGASA-2025-0234","MGASA-2025-0235"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39731.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/08a7efc5b02a0620ae16aa9584060e980a69cb55"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0fe7976b62546f1e95eebfe9879925e9aa22b7a8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1023836d1b9465593c8746f97d608da32958785f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/18eea36f4f460ead3750ed4afe5496f7ce55f99e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/411e00f44e2e1a7fdb526013b25a7f0ed22a0947"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb69e69a5ae6c8350957893b5f68bd55b1565fb2"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39731.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39731"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bff139b49d9f70c1ac5384aac94554846aa834de"},{"fixed":"eb69e69a5ae6c8350957893b5f68bd55b1565fb2"},{"fixed":"1023836d1b9465593c8746f97d608da32958785f"},{"fixed":"0fe7976b62546f1e95eebfe9879925e9aa22b7a8"},{"fixed":"411e00f44e2e1a7fdb526013b25a7f0ed22a0947"},{"fixed":"18eea36f4f460ead3750ed4afe5496f7ce55f99e"},{"fixed":"08a7efc5b02a0620ae16aa9584060e980a69cb55"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39731.json"}}],"schema_version":"1.7.5"}