Patch "RDMA/srpt: Support specifying the srpt_service_guid parameter" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    RDMA/srpt: Support specifying the srpt_service_guid parameter

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rdma-srpt-support-specifying-the-srpt_service_guid-p.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 25e5b1a93b0d9d763151bc3854d5b386e4420972
Author: Bart Van Assche <bvanassche@xxxxxxx>
Date:   Sun Feb 4 16:42:07 2024 -0800

    RDMA/srpt: Support specifying the srpt_service_guid parameter
    
    [ Upstream commit fdfa083549de5d50ebf7f6811f33757781e838c0 ]
    
    Make loading ib_srpt with this parameter set work. The current behavior is
    that setting that parameter while loading the ib_srpt kernel module
    triggers the following kernel crash:
    
    BUG: kernel NULL pointer dereference, address: 0000000000000000
    Call Trace:
     <TASK>
     parse_one+0x18c/0x1d0
     parse_args+0xe1/0x230
     load_module+0x8de/0xa60
     init_module_from_file+0x8b/0xd0
     idempotent_init_module+0x181/0x240
     __x64_sys_finit_module+0x5a/0xb0
     do_syscall_64+0x5f/0xe0
     entry_SYSCALL_64_after_hwframe+0x6e/0x76
    
    Cc: LiHonggang <honggangli@xxxxxxx>
    Reported-by: LiHonggang <honggangli@xxxxxxx>
    Fixes: a42d985bd5b2 ("ib_srpt: Initial SRP Target merge for v3.3-rc1")
    Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
    Link: https://lore.kernel.org/r/20240205004207.17031-1-bvanassche@xxxxxxx
    Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index c12005eab14c1..38168d8c626fe 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -79,12 +79,16 @@ module_param(srpt_srq_size, int, 0444);
 MODULE_PARM_DESC(srpt_srq_size,
 		 "Shared receive queue (SRQ) size.");
 
+static int srpt_set_u64_x(const char *buffer, const struct kernel_param *kp)
+{
+	return kstrtou64(buffer, 16, (u64 *)kp->arg);
+}
 static int srpt_get_u64_x(char *buffer, const struct kernel_param *kp)
 {
 	return sprintf(buffer, "0x%016llx\n", *(u64 *)kp->arg);
 }
-module_param_call(srpt_service_guid, NULL, srpt_get_u64_x, &srpt_service_guid,
-		  0444);
+module_param_call(srpt_service_guid, srpt_set_u64_x, srpt_get_u64_x,
+		  &srpt_service_guid, 0444);
 MODULE_PARM_DESC(srpt_service_guid,
 		 "Using this value for ioc_guid, id_ext, and cm_listen_id instead of using the node_guid of the first HCA.");