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firmware: arm_ffa: Fix NULL dereference in ffa_partition_info_get()

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ffa_partition_info_get() passes uuid_str directly to uuid_parse()
without a NULL check. When a caller passes NULL, uuid_parse() ->
__uuid_parse() -> uuid_is_valid() dereferences the pointer, causing
a kernel panic:

  |  Unable to handle kernel NULL pointer dereference at virtual address
  |  0000000000000040
  |  pc : uuid_parse+0x40/0xac
  |  lr : ffa_partition_info_get+0x1c/0x94 [arm_ffa]

Add a NULL guard before uuid_parse() so a NULL argument returns
-ENODEV instead of crashing. Callers are expected to always supply
a valid partition UUID, so NULL is not a supported input.

Fixes: d0c0bce831 ("firmware: arm_ffa: Setup in-kernel users of FFA partitions")
Signed-off-by: Unnathi Chalicheemala <unnathi.chalicheemala@oss.qualcomm.com>
Link: https://patch.msgid.link/20260617-ffa_partition_nullptr_fix-v2-1-bc801b4ce34c@oss.qualcomm.com
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
This commit is contained in:
Unnathi Chalicheemala 2026-06-17 16:35:00 -07:00 committed by Sudeep Holla
parent 53716a4d74
commit 8ae5f8e483
1 changed files with 1 additions and 1 deletions
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2
drivers/firmware/arm_ffa/driver.c
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@ -1142,7 +1142,7 @@ static int ffa_partition_info_get(const char *uuid_str,
uuid_t uuid;
struct ffa_partition_info *pbuf;
if (uuid_parse(uuid_str, &uuid)) {
if (!uuid_str || uuid_parse(uuid_str, &uuid)) {
pr_err("invalid uuid (%s)\n", uuid_str);
return -ENODEV;
}