CVE-2025-39731 in Linux
Resumen
por VulDB • 2026-05-30
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:
f2fs: vm_unmap_ram() puede ser llamada desde un contexto inválido
Al probar F2FS con xfstests utilizando discos virtuales respaldados por UFS, el kernel a veces se queja de que f2fs_release_decomp_mem() llama a vm_unmap_ram() desde un contexto inválido. Ejemplo de traza de la prueba f2fs/007:
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>
[ 11.478544] dump_stack_lvl+0x59/0x80
[ 11.478546] ___might_sleep+0x109/0x110
[ 11.478548] __might_sleep+0x4e/0x90
[ 11.478550] vm_unmap_ram+0x33/0x120
[ 11.478552] f2fs_release_decomp_mem+0x33/0x50
[ 11.478554] f2fs_read_end_io+0x103/0x130
[ 11.478556] blk_mq_complete_request+0x10/0x20
[ 11.478558] blk_mq_poll_hctx+0x100/0x130
[ 11.478560] blk_poll+0x100/0x130
[ 11.478562] blk_rq_poll+0x10/0x20
[ 11.478564] blk_poll+0x100/0x130
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