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| author |   Zhengchao Shao <shaozhengchao@huawei.com> | 2022-11-07 09:14:45 +0800 |
|---|---|---|
| committer |   Paolo Abeni <pabeni@redhat.com> | 2022-11-08 12:47:36 +0100 |
| commit | 3faf7e14ec0c3462c2d747fa6793b8645d1391df (patch) | |
| tree | 7b3149743b84bf03047ee69876abd4e550b233c1 /drivers/net | |
| parent | Merge branch 'sctp-fix-a-null-pointer-dereference-in-sctp_sched_dequeue_common' (diff) | |
| download | linux-dev-3faf7e14ec0c3462c2d747fa6793b8645d1391df.tar.xz linux-dev-3faf7e14ec0c3462c2d747fa6793b8645d1391df.zip | |
net: lapbether: fix issue of invalid opcode in lapbeth_open()
If lapb_register() failed when lapb device goes to up for the first time,
the NAPI is not disabled. As a result, the invalid opcode issue is
reported when the lapb device goes to up for the second time.
The stack info is as follows:
[ 1958.311422][T11356] kernel BUG at net/core/dev.c:6442!
[ 1958.312206][T11356] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[ 1958.315979][T11356] RIP: 0010:napi_enable+0x16a/0x1f0
[ 1958.332310][T11356] Call Trace:
[ 1958.332817][T11356] <TASK>
[ 1958.336135][T11356] lapbeth_open+0x18/0x90
[ 1958.337446][T11356] __dev_open+0x258/0x490
[ 1958.341672][T11356] __dev_change_flags+0x4d4/0x6a0
[ 1958.345325][T11356] dev_change_flags+0x93/0x160
[ 1958.346027][T11356] devinet_ioctl+0x1276/0x1bf0
[ 1958.346738][T11356] inet_ioctl+0x1c8/0x2d0
[ 1958.349638][T11356] sock_ioctl+0x5d1/0x750
[ 1958.356059][T11356] __x64_sys_ioctl+0x3ec/0x1790
[ 1958.365594][T11356] do_syscall_64+0x35/0x80
[ 1958.366239][T11356] entry_SYSCALL_64_after_hwframe+0x46/0xb0
[ 1958.377381][T11356] </TASK>
Fixes: 514e1150da9c ("net: x25: Queue received packets in the drivers instead of per-CPU queues")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Link: https://lore.kernel.org/r/20221107011445.207372-1-shaozhengchao@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wan/lapbether.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c index cb360dca3250..d62a904d2e42 100644 --- a/drivers/net/wan/lapbether.c +++ b/drivers/net/wan/lapbether.c @@ -325,6 +325,7 @@ static int lapbeth_open(struct net_device *dev) err = lapb_register(dev, &lapbeth_callbacks); if (err != LAPB_OK) { + napi_disable(&lapbeth->napi); pr_err("lapb_register error: %d\n", err); return -ENODEV; } |