CVE-2025-23132
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: quota: fix to avoid warning in dquot_writeback_dquots() F2FS-fs (dm-59): checkpoint=enable has some unwritten data. ------------[ cut here ]------------ WARNING: CPU: 6 PID: 8013 at fs/quota/dquot.c:691 dquot_writeback_dquots+0x2fc/0x308 pc : dquot_writeback_dquots+0x2fc/0x308 lr : f2fs_quota_sync+0xcc/0x1c4 Call trace: dquot_writeback_dquots+0x2fc/0x308 f2fs_quota_sync+0xcc/0x1c4 f2fs_write_checkpoint+0x3d4/0x9b0 f2fs_issue_checkpoint+0x1bc/0x2c0 f2fs_sync_fs+0x54/0x150 f2fs_do_sync_file+0x2f8/0x814 __f2fs_ioctl+0x1960/0x3244 f2fs_ioctl+0x54/0xe0 __arm64_sys_ioctl+0xa8/0xe4 invoke_syscall+0x58/0x114 checkpoint and f2fs_remount may race as below, resulting triggering warning in dquot_writeback_dquots(). atomic write remount - do_remount - down_write(&sb->s_umount); - f2fs_remount - ioctl - f2fs_do_sync_file - f2fs_sync_fs - f2fs_write_checkpoint - block_operations - locked = down_read_trylock(&sbi->sb->s_umount) : fail to lock due to the write lock was held by remount - up_write(&sb->s_umount); - f2fs_quota_sync - dquot_writeback_dquots - WARN_ON_ONCE(!rwsem_is_locked(&sb->s_umount)) : trigger warning because s_umount lock was unlocked by remount If checkpoint comes from mount/umount/remount/freeze/quotactl, caller of checkpoint has already held s_umount lock, calling dquot_writeback_dquots() in the context should be safe. So let's record task to sbi->umount_lock_holder, so that checkpoint can know whether the lock has held in the context or not by checking current w/ it. In addition, in order to not misrepresent caller of checkpoint, we should not allow to trigger async checkpoint for those callers: mount/umount/remount/ freeze/quotactl.
View original CVE JSON
{
"id": "CVE-2025-23132",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-04-16T15:16:07.630",
"lastModified": "2026-10-21T13:18:05.027",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: quota: fix to avoid warning in dquot_writeback_dquots()\n\nF2FS-fs (dm-59): checkpoint=enable has some unwritten data.\n\n------------[ cut here ]------------\nWARNING: CPU: 6 PID: 8013 at fs/quota/dquot.c:691 dquot_writeback_dquots+0x2fc/0x308\npc : dquot_writeback_dquots+0x2fc/0x308\nlr : f2fs_quota_sync+0xcc/0x1c4\nCall trace:\ndquot_writeback_dquots+0x2fc/0x308\nf2fs_quota_sync+0xcc/0x1c4\nf2fs_write_checkpoint+0x3d4/0x9b0\nf2fs_issue_checkpoint+0x1bc/0x2c0\nf2fs_sync_fs+0x54/0x150\nf2fs_do_sync_file+0x2f8/0x814\n__f2fs_ioctl+0x1960/0x3244\nf2fs_ioctl+0x54/0xe0\n__arm64_sys_ioctl+0xa8/0xe4\ninvoke_syscall+0x58/0x114\n\ncheckpoint and f2fs_remount may race as below, resulting triggering warning\nin dquot_writeback_dquots().\n\natomic write remount\n - do_remount\n - down_write(&sb->s_umount);\n - f2fs_remount\n- ioctl\n - f2fs_do_sync_file\n - f2fs_sync_fs\n - f2fs_write_checkpoint\n - block_operations\n - locked = down_read_trylock(&sbi->sb->s_umount)\n : fail to lock due to the write lock was held by remount\n - up_write(&sb->s_umount);\n - f2fs_quota_sync\n - dquot_writeback_dquots\n - WARN_ON_ONCE(!rwsem_is_locked(&sb->s_umount))\n : trigger warning because s_umount lock was unlocked by remount\n\nIf checkpoint comes from mount/umount/remount/freeze/quotactl, caller of\ncheckpoint has already held s_umount lock, calling dquot_writeback_dquots()\nin the context should be safe.\n\nSo let's record task to sbi->umount_lock_holder, so that checkpoint can\nknow whether the lock has held in the context or not by checking current\nw/ it.\n\nIn addition, in order to not misrepresent caller of checkpoint, we should\nnot allow to trigger async checkpoint for those callers: mount/umount/remount/\nfreeze/quotactl."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: cuota: corrección para evitar advertencias en dquot_writeback_dquots() F2FS-fs (dm-59): checkpoint=enable tiene algunos datos no escritos. ------------[ cortar aquí ]------------ ADVERTENCIA: CPU: 6 PID: 8013 en fs/quota/dquot.c:691 dquot_writeback_dquots+0x2fc/0x308 pc : dquot_writeback_dquots+0x2fc/0x308 lr : f2fs_quota_sync+0xcc/0x1c4 Rastreo de llamadas: dquot_writeback_dquots+0x2fc/0x308 f2fs_quota_sync+0xcc/0x1c4 f2fs_write_checkpoint+0x3d4/0x9b0 f2fs_issue_checkpoint+0x1bc/0x2c0 f2fs_sync_fs+0x54/0x150 f2fs_do_sync_file+0x2f8/0x814 __f2fs_ioctl+0x1960/0x3244 f2fs_ioctl+0x54/0xe0 __arm64_sys_ioctl+0xa8/0xe4 evolve_syscall+0x58/0x114 el punto de control y f2fs_remount pueden competir como se muestra a continuación, lo que activa una advertencia en dquot_writeback_dquots(). remot de escritura atómica - do_remount - down_write(&sb->s_umount); - f2fs_remount - ioctl - f2fs_do_sync_file - f2fs_sync_fs - f2fs_write_checkpoint - block_operations - locking = down_read_trylock(&sbi->sb->s_umount) : no se pudo bloquear debido a que el bloqueo de escritura fue mantenido por el remot - up_write(&sb->s_umount); - f2fs_quota_sync - dquot_writeback_dquots - WARN_ON_ONCE(!rwsem_is_locked(&sb->s_umount)) : activa una advertencia porque el bloqueo s_umount se desbloqueó al volver a montar Si el punto de control proviene de mount/umount/remount/freeze/quotactl, el llamador del punto de control ya ha mantenido el bloqueo s_umount, llamar a dquot_writeback_dquots() en el contexto debería ser seguro. Así que grabemos la tarea en sbi->umount_lock_holder, para que el punto de control pueda saber si el bloqueo se ha mantenido en el contexto o no al verificar la corriente con él. Además, para no tergiversar la llamada del punto de control, no deberíamos permitir que se active el punto de control asíncrono para esos llamadores: mount/umount/remount/freeze/quotactl."
}
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