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d821f7c13c
The access to non-existent netlink attribute causes to the following
kernel panic. Fix it by checking existence before trying to read it.
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 6744 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:nla_get_u32 include/net/netlink.h:1554 [inline]
RIP: 0010:nldev_stat_set_mode_doit drivers/infiniband/core/nldev.c:1909 [inline]
RIP: 0010:nldev_stat_set_doit+0x578/0x10d0 drivers/infiniband/core/nldev.c:2040
Code: fa 4c 8b a4 24 f8 02 00 00 48 b8 00 00 00 00 00 fc ff df c7 84 24 80 00 00 00 00 00 00 00 49 8d 7c 24 04 48 89
fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 02
RSP: 0018:ffffc90004acf2e8 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002b94000
RDX: 0000000000000000 RSI: ffffffff8684c5ff RDI: 0000000000000004
RBP: ffff88807cda4000 R08: 0000000000000000 R09: ffff888023fb8027
R10: ffffffff8684c5d7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffff888041024280 R15: ffff888031ade780
FS: 00007eff9dddd700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ef24000 CR3: 0000000036902000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195
rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
___sys_sendmsg+0xf3/0x170 net/socket.c:2463
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Fixes:
|
||
|---|---|---|
| .. | ||
| addr.c | ||
| agent.c | ||
| agent.h | ||
| cache.c | ||
| cgroup.c | ||
| cm.c | ||
| cm_msgs.h | ||
| cm_trace.c | ||
| cm_trace.h | ||
| cma.c | ||
| cma_configfs.c | ||
| cma_priv.h | ||
| cma_trace.c | ||
| cma_trace.h | ||
| core_priv.h | ||
| counters.c | ||
| cq.c | ||
| device.c | ||
| ib_core_uverbs.c | ||
| iwcm.c | ||
| iwcm.h | ||
| iwpm_msg.c | ||
| iwpm_util.c | ||
| iwpm_util.h | ||
| lag.c | ||
| mad.c | ||
| mad_priv.h | ||
| mad_rmpp.c | ||
| mad_rmpp.h | ||
| Makefile | ||
| mr_pool.c | ||
| multicast.c | ||
| netlink.c | ||
| nldev.c | ||
| opa_smi.h | ||
| packer.c | ||
| rdma_core.c | ||
| rdma_core.h | ||
| restrack.c | ||
| restrack.h | ||
| roce_gid_mgmt.c | ||
| rw.c | ||
| sa.h | ||
| sa_query.c | ||
| security.c | ||
| smi.c | ||
| smi.h | ||
| sysfs.c | ||
| trace.c | ||
| ucma.c | ||
| ud_header.c | ||
| umem.c | ||
| umem_dmabuf.c | ||
| umem_odp.c | ||
| user_mad.c | ||
| uverbs.h | ||
| uverbs_cmd.c | ||
| uverbs_ioctl.c | ||
| uverbs_main.c | ||
| uverbs_marshall.c | ||
| uverbs_std_types.c | ||
| uverbs_std_types_async_fd.c | ||
| uverbs_std_types_counters.c | ||
| uverbs_std_types_cq.c | ||
| uverbs_std_types_device.c | ||
| uverbs_std_types_dm.c | ||
| uverbs_std_types_flow_action.c | ||
| uverbs_std_types_mr.c | ||
| uverbs_std_types_qp.c | ||
| uverbs_std_types_srq.c | ||
| uverbs_std_types_wq.c | ||
| uverbs_uapi.c | ||
| verbs.c | ||