CVE-2021-47076

In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Return CQE error if invalid lkey was supplied RXE is missing
update of WQE status in LOCAL_WRITE failures. This caused the following
kernel panic if someone sent an atomic operation with an explicitly wrong
lkey. [leonro@vm ~]$ mkt test test_atomic_invalid_lkey
(tests.test_atomic.AtomicTest) … WARNING: CPU: 5 PID: 263 at
drivers/infiniband/sw/rxe/rxe_comp.c:740 rxe_completer+0x1a6d/0x2e30
[rdma_rxe] Modules linked in: crc32_generic rdma_rxe ip6_udp_tunnel
udp_tunnel rdma_ucm rdma_cm ib_umad ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs
ib_core mlx5_core ptp pps_core CPU: 5 PID: 263 Comm: python3 Not tainted
5.13.0-rc1+ #2936 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP:
0010:rxe_completer+0x1a6d/0x2e30 [rdma_rxe] Code: 03 0f 8e 65 0e 00 00 3b
93 10 06 00 00 0f 84 82 0a 00 00 4c 89 ff 4c 89 44 24 38 e8 2d 74 a9 e1 4c
8b 44 24 38 e9 1c f5 ff ff <0f> 0b e9 0c e8 ff ff b8 05 00 00 00 41 bf 05
00 00 00 e9 ab e7 ff RSP: 0018:ffff8880158af090 EFLAGS: 00010246 RAX:
0000000000000000 RBX: ffff888016a78000 RCX: ffffffffa0cf1652 RDX:
1ffff9200004b442 RSI: 0000000000000004 RDI: ffffc9000025a210 RBP:
dffffc0000000000 R08: 00000000ffffffea R09: ffff88801617740b R10:
ffffed1002c2ee81 R11: 0000000000000007 R12: ffff88800f3b63e8 R13:
ffff888016a78008 R14: ffffc9000025a180 R15: 000000000000000c FS:
00007f88b622a740(0000) GS:ffff88806d540000(0000) knlGS:0000000000000000 CS:
0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f88b5a1fa10 CR3:
000000000d848004 CR4: 0000000000370ea0 DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6:
00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rxe_do_task+0x130/0x230
[rdma_rxe] rxe_rcv+0xb11/0x1df0 [rdma_rxe] rxe_loopback+0x157/0x1e0
[rdma_rxe] rxe_responder+0x5532/0x7620 [rdma_rxe] rxe_do_task+0x130/0x230
[rdma_rxe] rxe_rcv+0x9c8/0x1df0 [rdma_rxe] rxe_loopback+0x157/0x1e0
[rdma_rxe] rxe_requester+0x1efd/0x58c0 [rdma_rxe] rxe_do_task+0x130/0x230
[rdma_rxe] rxe_post_send+0x998/0x1860 [rdma_rxe]
ib_uverbs_post_send+0xd5f/0x1220 [ib_uverbs] ib_uverbs_write+0x847/0xc80
[ib_uverbs] vfs_write+0x1c5/0x840 ksys_write+0x176/0x1d0
do_syscall_64+0x3f/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae