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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Sep 2024 10:45:23.2509 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 75d06a8f-ba17-4984-4760-08dcd8982a2e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF000001EE.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8877 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1726742763976116600 Content-Type: text/plain; charset="utf-8" With CONFIG_OVERLAY_DTB=3Dy, unflatten_dt_alloc() is used as part of unflatten_dt_node() used during runtime. In case of a binary compiled such as unflatten_dt_alloc() does not get inlined (e.g. using -Og), attempt to add an overlay to Xen (xl dt-overlay add) results in a crash. (XEN) Instruction Abort Trap. Syndrome=3D0x7 (XEN) Walking Hypervisor VA 0xa00002c8cc0 on CPU2 via TTBR 0x00000000403400= 00 (XEN) 0TH[0x014] =3D 0x4033ff7f (XEN) 1ST[0x000] =3D 0x4033ef7f (XEN) 2ND[0x001] =3D 0x4000004033af7f (XEN) 3RD[0x0c8] =3D 0x0 (XEN) CPU2: Unexpected Trap: Instruction Abort (XEN) ----[ Xen-4.20-unstable arm64 debug=3Dy Not tainted ]---- ... (XEN) Xen call trace: (XEN) [<00000a00002c8cc0>] 00000a00002c8cc0 (PC) (XEN) [<00000a0000202410>] device-tree.c#unflatten_dt_node+0xd0/0x504 (L= R) (XEN) [<00000a0000204484>] unflatten_device_tree+0x54/0x1a0 (XEN) [<00000a000020800c>] dt-overlay.c#handle_add_overlay_nodes+0x290/0= x3d4 (XEN) [<00000a0000208360>] dt_overlay_sysctl+0x8c/0x110 (XEN) [<00000a000027714c>] arch_do_sysctl+0x1c/0x2c Fixes: 9e9d2c079dc4 ("xen/arm/device: Remove __init from function type") Signed-off-by: Michal Orzel Reviewed-by: Stefano Stabellini --- xen/common/device-tree/device-tree.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/xen/common/device-tree/device-tree.c b/xen/common/device-tree/= device-tree.c index 8d1017a49d80..d0528c582565 100644 --- a/xen/common/device-tree/device-tree.c +++ b/xen/common/device-tree/device-tree.c @@ -120,8 +120,8 @@ void dt_child_set_range(__be32 **cellp, int addrcells, = int sizecells, dt_set_cell(cellp, sizecells, size); } =20 -static void __init *unflatten_dt_alloc(unsigned long *mem, unsigned long s= ize, - unsigned long align) +static void *unflatten_dt_alloc(unsigned long *mem, unsigned long size, + unsigned long align) { void *res; =20 --=20 2.37.6