kmsan_handle_dma_sg(9)

🫶 kmsan_handle_dma_sg(9) — Kernel API Manual 🫶

okay bestie, welcome to kmsan_handle_dma_sg(9) in the Kernel API Manual. this page is literally about handling a DMA transfer using scatterlist, and it's giving short-and-iconic. 💅

🌸 NAME 🌸

kmsan_handle_dma_sg — Handle a DMA transfer using scatterlist.

✨ SYNOPSIS ✨

void kmsan_handle_dma_sg (struct scatterlist *sg , int nents , enum dma_data_direction dir );

🎀 ARGUMENTS 🎀

• sg — scatterlist holding DMA buffers. the buffer holder, periodt.
• nents — number of scatterlist entries.
• dir — one of possible dma_data_direction values.

💖 DESCRIPTION 💖

Depending on direction, KMSAN:

• checks the buffers in the scatterlist, if they are copied to device;
• initializes the buffers, if they are copied from device;
• does both, if this is a DMA_BIDIRECTIONAL transfer.

so it's giving: vibe check for to-device, glow-up init for from-device, and full main-character mode for DMA_BIDIRECTIONAL. 🔥

🦋 SEE ALSO 🦋

Kernel file: ./include/linux kmsan.h — and these besties:

• kmsan_task_create(9)
• kmsan_task_exit(9)
• kmsan_init_shadow(9)
• kmsan_init_runtime(9)
• kmsan_memblock_free_pages(9)
• kmsan_alloc_page(9)
• kmsan_free_page(9)
• kmsan_copy_page_meta(9)
• kmsan_slab_alloc(9)
• kmsan_slab_free(9)
• kmsan_kmalloc_large(9)
• kmsan_kfree_large(9)
• kmsan_ioremap_page_range(9)
• kmsan_iounmap_page_range(9)
• kmsan_handle_dma(9)
• kmsan_handle_urb(9)
• kmsan_unpoison_entry_regs(9)
• kmsan_get_metadata(9)
• kmsan_enable_current(9)
• kmsan_disable_current(9)
• memset_no_sanitize_memory(9)

byeee 💖 footer vibes: source/version ./include/linux, date October 2026, page kmsan_handle_dma_sg(9). mwah 🫶