diff options
| author | Jeuk Kim <jeuk20.kim@samsung.com> | 2024-02-05 12:20:15 +0900 |
|---|---|---|
| committer | Jeuk Kim <jeuk20.kim@samsung.com> | 2024-04-29 12:13:35 +0900 |
| commit | f2c8aeb1afefcda92054c448b21fc59cdd99db30 (patch) | |
| tree | c2f6ffb7b1e5b311f5761da54b50694dd0681844 /hw/ufs | |
| parent | fd87be1dada5672f877e03c2ca8504458292c479 (diff) | |
hw/ufs: Fix buffer overflow bug
It fixes the buffer overflow vulnerability in the ufs device.
The bug was detected by sanitizers.
You can reproduce it by:
cat << EOF |\
qemu-system-x86_64 \
-display none -machine accel=qtest -m 512M -M q35 -nodefaults -drive \
file=null-co://,if=none,id=disk0 -device ufs,id=ufs_bus -device \
ufs-lu,drive=disk0,bus=ufs_bus -qtest stdio
outl 0xcf8 0x80000810
outl 0xcfc 0xe0000000
outl 0xcf8 0x80000804
outw 0xcfc 0x06
write 0xe0000058 0x1 0xa7
write 0xa 0x1 0x50
EOF
Resolves: #2299
Fixes: 329f16624499 ("hw/ufs: Support for Query Transfer Requests")
Reported-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Jeuk Kim <jeuk20.kim@samsung.com>
Diffstat (limited to 'hw/ufs')
| -rw-r--r-- | hw/ufs/ufs.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/hw/ufs/ufs.c b/hw/ufs/ufs.c index eccdb852a0..bac78a32bb 100644 --- a/hw/ufs/ufs.c +++ b/hw/ufs/ufs.c @@ -126,6 +126,10 @@ static MemTxResult ufs_dma_read_req_upiu(UfsRequest *req) copy_size = sizeof(UtpUpiuHeader) + UFS_TRANSACTION_SPECIFIC_FIELD_SIZE + data_segment_length; + if (copy_size > sizeof(req->req_upiu)) { + copy_size = sizeof(req->req_upiu); + } + ret = ufs_addr_read(u, req_upiu_base_addr, &req->req_upiu, copy_size); if (ret) { trace_ufs_err_dma_read_req_upiu(req->slot, req_upiu_base_addr); @@ -225,6 +229,10 @@ static MemTxResult ufs_dma_write_rsp_upiu(UfsRequest *req) copy_size = rsp_upiu_byte_len; } + if (copy_size > sizeof(req->rsp_upiu)) { + copy_size = sizeof(req->rsp_upiu); + } + ret = ufs_addr_write(u, rsp_upiu_base_addr, &req->rsp_upiu, copy_size); if (ret) { trace_ufs_err_dma_write_rsp_upiu(req->slot, rsp_upiu_base_addr); |