VFS: fix TOCTOU bug in sync
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1 changed files with 3 additions and 3 deletions
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@ -299,13 +299,13 @@ int do_sync()
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int r = OK;
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for (vmp = &vmnt[0]; vmp < &vmnt[NR_MNTS]; ++vmp) {
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if (vmp->m_dev != NO_DEV && vmp->m_fs_e != NONE &&
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vmp->m_root_node != NULL) {
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if ((r = lock_vmnt(vmp, VMNT_EXCL)) != OK)
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break;
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if (vmp->m_dev != NO_DEV && vmp->m_fs_e != NONE &&
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vmp->m_root_node != NULL) {
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req_sync(vmp->m_fs_e);
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unlock_vmnt(vmp);
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}
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unlock_vmnt(vmp);
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}
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return(r);
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