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cmd: unzip: Use map_sysmem() with buffers in the gzwrite command

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The current implementation casts an address to a pointer. Make it more
sandbox-friendly by using map_sysmem().

Convert 'addr' variable to unsigned long, as that is the return type of
hextoul() and address parameter type of map_sysmem().

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
This commit is contained in:
Marek Vasut
2026-01-28 20:41:04 +01:00
committed by Tom Rini
parent 02ffe4a0c9
commit f2c704c0e8
1 changed files with 8 additions and 3 deletions
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11
cmd/unzip.c
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@@ -50,11 +50,12 @@ static int do_gzwrite(struct cmd_tbl *cmdtp, int flag,
{
struct blk_desc *bdev;
int ret;
unsigned char *addr;
unsigned long addr;
unsigned long length;
unsigned long writebuf = 1<<20;
off_t startoffs = 0;
size_t szexpected = 0;
void *addrp;
if (argc < 5)
return CMD_RET_USAGE;
@@ -62,7 +63,7 @@ static int do_gzwrite(struct cmd_tbl *cmdtp, int flag,
if (ret < 0)
return CMD_RET_FAILURE;
addr = (unsigned char *)hextoul(argv[3], NULL);
addr = hextoul(argv[3], NULL);
length = hextoul(argv[4], NULL);
if (5 < argc) {
@@ -75,7 +76,11 @@ static int do_gzwrite(struct cmd_tbl *cmdtp, int flag,
}
}
ret = gzwrite(addr, length, bdev, writebuf, startoffs, szexpected);
addrp = map_sysmem(addr, length);
ret = gzwrite(addrp, length, bdev, writebuf, startoffs, szexpected);
unmap_sysmem(addrp);
return ret ? CMD_RET_FAILURE : CMD_RET_SUCCESS;
}