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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?eF825IdJVE6ZWxkjmX62gdntZgp7G1kLQ0BDV3gUUroCuesJvQ0nvMF5GMEf?= =?us-ascii?Q?9txaGTjHAKlUUJBO/VkhIzGrJ0ZrLhoIyBJgGYO2oCqVRlYtTYWODbRatkyu?= =?us-ascii?Q?59mukeDOZ2gKgGcueJWf93cCerHWAUiccjsyfHLlJGExJSNw9Q9TKJPIdPoT?= =?us-ascii?Q?ZTf/KB5bYZrm6u3TMBOfXf6ZTPKSvvZ5yTCIYTzkSfe6M+1T41bsRVVXAUS1?= =?us-ascii?Q?lqYNArVhbyDmkHWzrykHFjsvw9LgEeAAlW94z6Lq3m/uuNWefbvUSPVvJ2W0?= =?us-ascii?Q?3sIrlIpaI9Qodv1RdZ+b+Z4wJLlRnoQ7HcgAs69nRn3cs4TcHJS1f+vQlYFv?= =?us-ascii?Q?eM6oNcajC/93wfmiOO4NbPHCW5zkVR53sdhPiGbKqOiI1TG3O6pwBmvOKDrn?= =?us-ascii?Q?lcgivFuTVgqHC4YI6uFJscUjiD59DthFnuWqsezijE0RPtQxtiaMwlnxJrbl?= =?us-ascii?Q?FjxoV90yFt0RNWy+ugirOk6LfkOo4CdCN5yZUMPUe5b9gOIq181RDjem45fH?= =?us-ascii?Q?0zlThRyDQrjGXyvqtgzReuSdiv3JH20ig8ZnQd12/9ad+0IPG0EooPcvz+y1?= =?us-ascii?Q?BWJhFg//jdIb+g/mLmBs/LB2+mN/alSgEAdajrGILaifyhYWR5zxIi8+DWTR?= =?us-ascii?Q?0E5uBODCrT4TZ25s/SoocU5DxlQtVAvY1/AoAINi6lC84wJosAcFw160Ws9W?= =?us-ascii?Q?FVrKro2x6bg5FKQHJdC8Nucw0IXnxbUdAqZI4YWaQvoMm6zKn3NFg1ttZQ5H?= =?us-ascii?Q?tFkb9EZT8JyuYcpAH7TYvo9Tt9jVbwSnUnfPpHeGT/lp9tIZo1aSg0/dCgcl?= =?us-ascii?Q?nNKLXFhHlGZ28N6k8qE0hKxyYP1TfteiTNrdPPxKN4c8Fs7oUg95ApMqmcu8?= =?us-ascii?Q?1+Bo/khBlw+f5G8H4jWKqBAVhq1g6LIoh2MksLgpr5buzIInDAdxUyN6WwMg?= =?us-ascii?Q?nkgCmIMyspP+nHAzxgmrzGagFx8LhfqDVdfAYEaFWoSwhS0oMeKSJ9oD1UN7?= =?us-ascii?Q?QCyCBvd6FUFMXK9YmUG1izYSHeIRC5RBfUPHVuYSTXPvFFcLlMW8JROAf/2J?= =?us-ascii?Q?jkKzzeKowmCqTMTIOxM72iTqPYHTsBAmX96rRC/7YsWLdcwjuUrG4LcldFpE?= =?us-ascii?Q?eVzpUmH4x+gS4Y+yU3T+ssM3V/nvDB7fJe/qZ3yaYrSOsnT2IGniN6r8rDLr?= =?us-ascii?Q?I2SuwIuKZKepWgeQ66sLOgT+LsNMeF7qXUVQ4Gv+fj0mN9SPMK7LOaRe6SQP?= =?us-ascii?Q?pSncR/49V+LuFGyRyq1lk46aQ+O0K5YyWKKepTT04WK6uzq0A4WtuctbmoMc?= =?us-ascii?Q?RcO+t+kszb/NUMyuLSnNkO8kx6H3TqMRmVsYnD9x4N2aXGJQO2g1eTw2sc85?= =?us-ascii?Q?PrP9aAp005PcEcsqilh4Hekm6WskF73sCfk8ay8fZzkQjFQ+ESQQ2qKx6V5d?= =?us-ascii?Q?3cEafT5vmwWmy1Rl29ebV1czSDfzjK25qrFL/XEDf1f7SETbX3n1JEVGTS5D?= =?us-ascii?Q?1vmuwuCif44d2qCanmmW4qnwCqRrszx19dUtpBVqukuy11UU28pbh+UUIc8M?= =?us-ascii?Q?U4t/RBsreLT8sJPlDYbCc7+d7zz+0F2Wd/q5zrCm?= X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: abafcf1d-0830-44a1-d8bb-08dd6daa8257 X-MS-Exchange-CrossTenant-AuthSource: PAXPR04MB8459.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Mar 2025 03:42:05.8807 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: xoIszoSW2/Xv37A2hI+zIkL3+yqmHaoAnYFggLfBSo5tznFMmFt2jYkdXt4np6cU9cImHCJfvuW20Lpjs84uig== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PR3PR04MB7418 On Thu, Mar 27, 2025 at 11:46:33AM -0600, Mathieu Poirier wrote: >Hi, > >On Wed, Mar 26, 2025 at 10:02:14AM +0800, Peng Fan (OSS) wrote: >> From: Peng Fan >> >> There is case as below could trigger kernel dump: >> Use U-Boot to start remote processor(rproc) with resource table >> published to a fixed address by rproc. After Kernel boots up, >> stop the rproc, load a new firmware which doesn't have resource table >> ,and start rproc. >> > >If a firwmare image doesn't have a resouce table, rproc_elf_load_rsc_table() >will return an error [1], rproc_fw_boot() will exit prematurely [2] and the >remote processor won't be started. What am I missing? STM32 and i.MX use their own parse_fw implementation which allows no resource table: https://elixir.bootlin.com/linux/v6.13.7/source/drivers/remoteproc/stm32_rproc.c#L272 https://elixir.bootlin.com/linux/v6.13.7/source/drivers/remoteproc/imx_rproc.c#L598 Thanks, Peng > >[1]. https://elixir.bootlin.com/linux/v6.14-rc6/source/drivers/remoteproc/remoteproc_elf_loader.c#L338 >[2]. https://elixir.bootlin.com/linux/v6.14-rc6/source/drivers/remoteproc/remoteproc_core.c#L1411 > >> When starting rproc with a firmware not have resource table, >> `memcpy(loaded_table, rproc->cached_table, rproc->table_sz)` will >> trigger dump, because rproc->cache_table is set to NULL during the last >> stop operation, but rproc->table_sz is still valid. >> >> This issue is found on i.MX8MP and i.MX9. >> >> Dump as below: >> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 >> Mem abort info: >> ESR = 0x0000000096000004 >> EC = 0x25: DABT (current EL), IL = 32 bits >> SET = 0, FnV = 0 >> EA = 0, S1PTW = 0 >> FSC = 0x04: level 0 translation fault >> Data abort info: >> ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 >> CM = 0, WnR = 0, TnD = 0, TagAccess = 0 >> GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 >> user pgtable: 4k pages, 48-bit VAs, pgdp=000000010af63000 >> [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 >> Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP >> Modules linked in: >> CPU: 2 UID: 0 PID: 1060 Comm: sh Not tainted 6.14.0-rc7-next-20250317-dirty #38 >> Hardware name: NXP i.MX8MPlus EVK board (DT) >> pstate: a0000005 (NzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) >> pc : __pi_memcpy_generic+0x110/0x22c >> lr : rproc_start+0x88/0x1e0 >> Call trace: >> __pi_memcpy_generic+0x110/0x22c (P) >> rproc_boot+0x198/0x57c >> state_store+0x40/0x104 >> dev_attr_store+0x18/0x2c >> sysfs_kf_write+0x7c/0x94 >> kernfs_fop_write_iter+0x120/0x1cc >> vfs_write+0x240/0x378 >> ksys_write+0x70/0x108 >> __arm64_sys_write+0x1c/0x28 >> invoke_syscall+0x48/0x10c >> el0_svc_common.constprop.0+0xc0/0xe0 >> do_el0_svc+0x1c/0x28 >> el0_svc+0x30/0xcc >> el0t_64_sync_handler+0x10c/0x138 >> el0t_64_sync+0x198/0x19c >> >> Clear rproc->table_sz to address the issue. >> >> While at here, also clear rproc->table_sz when rproc_fw_boot and >> rproc_detach. >> >> Fixes: 9dc9507f1880 ("remoteproc: Properly deal with the resource table when detaching") >> Signed-off-by: Peng Fan >> --- >> >> V2: >> Clear table_sz when rproc_fw_boot and rproc_detach per Arnaud >> >> drivers/remoteproc/remoteproc_core.c | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c >> index c2cf0d277729..1efa53d4e0c3 100644 >> --- a/drivers/remoteproc/remoteproc_core.c >> +++ b/drivers/remoteproc/remoteproc_core.c >> @@ -1442,6 +1442,7 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) >> kfree(rproc->cached_table); >> rproc->cached_table = NULL; >> rproc->table_ptr = NULL; >> + rproc->table_sz = 0; >> unprepare_rproc: >> /* release HW resources if needed */ >> rproc_unprepare_device(rproc); >> @@ -2025,6 +2026,7 @@ int rproc_shutdown(struct rproc *rproc) >> kfree(rproc->cached_table); >> rproc->cached_table = NULL; >> rproc->table_ptr = NULL; >> + rproc->table_sz = 0; >> out: >> mutex_unlock(&rproc->lock); >> return ret; >> @@ -2091,6 +2093,7 @@ int rproc_detach(struct rproc *rproc) >> kfree(rproc->cached_table); >> rproc->cached_table = NULL; >> rproc->table_ptr = NULL; >> + rproc->table_sz = 0; >> out: >> mutex_unlock(&rproc->lock); >> return ret; >> -- >> 2.37.1 >> >