Pavel Skripkin b267a8118c udmabuf: validate ubuf->pagecount ... [ Upstream commit 2b6dd600dd72573c23ea180b5b0b2f1813405882 ] Syzbot has reported GPF in sg_alloc_append_table_from_pages(). The problem was in ubuf->pages == ZERO_PTR. ubuf->pagecount is calculated from arguments passed from user-space. If user creates udmabuf with list.size == 0 then ubuf->pagecount will be also equal to zero; it causes kmalloc_array() to return ZERO_PTR. Fix it by validating ubuf->pagecount before passing it to kmalloc_array(). Fixes: fbb0de7950 ("Add udmabuf misc device") Reported-and-tested-by: syzbot+2c56b725ec547fa9cb29@syzkaller.appspotmail.com Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> Link: http://patchwork.freedesktop.org/patch/msgid/20211230142649.23022-1-paskripkin@gmail.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-08 14:40:12 +02:00
..
heaps
dma-buf.c	dma-buf: WARN on dmabuf release with pending attachments	2021-11-18 14:03:52 +01:00
dma-fence-array.c	dma_fence_array: Fix PENDING_ERROR leak in dma_fence_array_signaled()	2022-01-27 10:53:43 +01:00
dma-fence-chain.c
dma-fence.c
dma-heap.c	dma-buf: heaps: Fix potential spectre v1 gadget	2022-02-08 18:30:36 +01:00
dma-resv.c
Kconfig	dma-buf: DMABUF_MOVE_NOTIFY should depend on DMA_SHARED_BUFFER	2021-09-26 14:08:59 +02:00
Makefile
selftest.c
selftest.h
selftests.h
seqno-fence.c
st-dma-fence-chain.c
st-dma-fence.c
sw_sync.c
sync_debug.c
sync_debug.h
sync_file.c
sync_trace.h
udmabuf.c	udmabuf: validate ubuf->pagecount	2022-04-08 14:40:12 +02:00