[PATCH v4 1/4] RDMA/core: Fix memory free for GID table

[zhenwei pi]

Remove RXE device, kernel shows:
RIP: 0010:free_large_kmalloc+0xf6/0x140
Code: 75 28 0f 0b 44 0f b6 2d a5 d6 d1 01 41 80 fd 01 0f 87 7c d1 ad ff 41 83 e5 01 74 3d 41 bc 00 f0 ff ff 45 31 ed e9 61 ff ff ff <0f> 0b 48 c7 c6 af b1 70 83 48 89 df e8 79 0a fa ff 5b 41 5c 41 5d
RSP: 0018:ffffd038c18074d8 EFLAGS: 00010293
RAX: 0017ffffc0000000 RBX: fffff86984219d00 RCX: 0000000000000000
RDX: 00000000000000f0 RSI: ffff899b88674000 RDI: fffff86984219d00
RBP: ffffd038c18074f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff899b88674000
R13: 0000000000000001 R14: ffff899b88674000 R15: ffff899b86180000
FS:  00007b163c71c740(0000) GS:ffff899c378bf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007b163c730200 CR3: 0000000106a1d000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kfree+0x163/0x3a0
 gid_table_release_one+0xaf/0xf0 [ib_core]
 ib_cache_release_one+0x66/0x80 [ib_core]
 ib_device_release+0x48/0xb0 [ib_core]
 device_release+0x44/0xa0
 kobject_put+0x9b/0x250
 put_device+0x13/0x30
 ib_unregister_device_and_put+0x40/0x60 [ib_core]
 nldev_dellink+0xd3/0x140 [ib_core]
 rdma_nl_rcv_msg+0x11d/0x300 [ib_core]
 ? netlink_bind+0x141/0x3a0
 rdma_nl_rcv_skb.constprop.0.isra.0+0xba/0x110 [ib_core]
 rdma_nl_rcv+0xe/0x20 [ib_core]
 netlink_unicast+0x28d/0x3e0
 netlink_sendmsg+0x214/0x470
 __sys_sendto+0x21f/0x230
 __x64_sys_sendto+0x24/0x40
 x64_sys_call+0x1888/0x26e0
 do_syscall_64+0xcb/0x14d0
 ? _copy_from_user+0x27/0x70
 ? do_sock_setsockopt+0xbd/0x190
 ? __sys_setsockopt+0x72/0xd0
 ? __x64_sys_setsockopt+0x1f/0x40
 ? x64_sys_call+0x221b/0x26e0
 ? do_syscall_64+0x109/0x14d0
 ? exc_page_fault+0x92/0x1c0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

GID table is allocated by *kzalloc_flex* instead of raw *kzalloc_obj*,
it also should be released in new style.

Fixes: 74e2711bb2af ("RDMA/core: Use kzalloc_flex for GID table")
Signed-off-by: zhenwei pi <zhenwei.pi@xxxxxxxxx>
---
 drivers/infiniband/core/cache.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index 896486fa6185..647a547e2d7f 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -801,7 +801,6 @@ static void release_gid_table(struct ib_device *device,
 	}
 
 	mutex_destroy(&table->lock);
-	kfree(table->data_vec);
 	kfree(table);
 }
 
-- 
2.43.0