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authorYueHaibing <yuehaibing@huawei.com>2019-05-06 17:25:29 +0200
committerDavid S. Miller <davem@davemloft.net>2019-05-07 21:17:23 +0200
commit68be930249d051fd54d3d99156b3dcadcb2a1f9b (patch)
treed11c7b815a4b350375b4e795ed978d1dbe33aba6 /net/dsa/dsa.c
parentl2tp: Fix possible NULL pointer dereference (diff)
downloadlinux-68be930249d051fd54d3d99156b3dcadcb2a1f9b.tar.xz
linux-68be930249d051fd54d3d99156b3dcadcb2a1f9b.zip
net: dsa: Fix error cleanup path in dsa_init_module
BUG: unable to handle kernel paging request at ffffffffa01c5430 PGD 3270067 P4D 3270067 PUD 3271063 PMD 230bc5067 PTE 0 Oops: 0000 [#1 CPU: 0 PID: 6159 Comm: modprobe Not tainted 5.1.0+ #33 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014 RIP: 0010:raw_notifier_chain_register+0x16/0x40 Code: 63 f8 66 90 e9 5d ff ff ff 90 90 90 90 90 90 90 90 90 90 90 55 48 8b 07 48 89 e5 48 85 c0 74 1c 8b 56 10 3b 50 10 7e 07 eb 12 <39> 50 10 7c 0d 48 8d 78 08 48 8b 40 08 48 85 c0 75 ee 48 89 46 08 RSP: 0018:ffffc90001c33c08 EFLAGS: 00010282 RAX: ffffffffa01c5420 RBX: ffffffffa01db420 RCX: 4fcef45928070a8b RDX: 0000000000000000 RSI: ffffffffa01db420 RDI: ffffffffa01b0068 RBP: ffffc90001c33c08 R08: 000000003e0a33d0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000094443661 R12: ffff88822c320700 R13: ffff88823109be80 R14: 0000000000000000 R15: ffffc90001c33e78 FS: 00007fab8bd08540(0000) GS:ffff888237a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffa01c5430 CR3: 00000002297ea000 CR4: 00000000000006f0 Call Trace: register_netdevice_notifier+0x43/0x250 ? 0xffffffffa01e0000 dsa_slave_register_notifier+0x13/0x70 [dsa_core ? 0xffffffffa01e0000 dsa_init_module+0x2e/0x1000 [dsa_core do_one_initcall+0x6c/0x3cc ? do_init_module+0x22/0x1f1 ? rcu_read_lock_sched_held+0x97/0xb0 ? kmem_cache_alloc_trace+0x325/0x3b0 do_init_module+0x5b/0x1f1 load_module+0x1db1/0x2690 ? m_show+0x1d0/0x1d0 __do_sys_finit_module+0xc5/0xd0 __x64_sys_finit_module+0x15/0x20 do_syscall_64+0x6b/0x1d0 entry_SYSCALL_64_after_hwframe+0x49/0xbe Cleanup allocated resourses if there are errors, otherwise it will trgger memleak. Fixes: c9eb3e0f8701 ("net: dsa: Add support for learning FDB through notification") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa/dsa.c')
-rw-r--r--net/dsa/dsa.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 36de4f2a3366..cb080efdc7b3 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -344,15 +344,22 @@ static int __init dsa_init_module(void)
rc = dsa_slave_register_notifier();
if (rc)
- return rc;
+ goto register_notifier_fail;
rc = dsa_legacy_register();
if (rc)
- return rc;
+ goto legacy_register_fail;
dev_add_pack(&dsa_pack_type);
return 0;
+
+legacy_register_fail:
+ dsa_slave_unregister_notifier();
+register_notifier_fail:
+ destroy_workqueue(dsa_owq);
+
+ return rc;
}
module_init(dsa_init_module);