| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47078: RDMA/rxe: Clear all QP fields if creation failed |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| RDMA/rxe: Clear all QP fields if creation failed |
| |
| rxe_qp_do_cleanup() relies on valid pointer values in QP for the properly |
| created ones, but in case rxe_qp_from_init() failed it was filled with |
| garbage and caused tot the following error. |
| |
| refcount_t: underflow; use-after-free. |
| WARNING: CPU: 1 PID: 12560 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28 |
| Modules linked in: |
| CPU: 1 PID: 12560 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0 |
| Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28 |
| Code: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 |
| RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286 |
| RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 |
| RDX: 0000000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67 |
| RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 |
| R10: ffffffff815b4eae R11: 0000000000000000 R12: ffff8880322a4800 |
| R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000 |
| FS: 00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 |
| CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0 |
| DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 |
| DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 |
| Call Trace: |
| __refcount_sub_and_test include/linux/refcount.h:283 [inline] |
| __refcount_dec_and_test include/linux/refcount.h:315 [inline] |
| refcount_dec_and_test include/linux/refcount.h:333 [inline] |
| kref_put include/linux/kref.h:64 [inline] |
| rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805 |
| execute_in_process_context+0x37/0x150 kernel/workqueue.c:3327 |
| rxe_elem_release+0x9f/0x180 drivers/infiniband/sw/rxe/rxe_pool.c:391 |
| kref_put include/linux/kref.h:65 [inline] |
| rxe_create_qp+0x2cd/0x310 drivers/infiniband/sw/rxe/rxe_verbs.c:425 |
| _ib_create_qp drivers/infiniband/core/core_priv.h:331 [inline] |
| ib_create_named_qp+0x2ad/0x1370 drivers/infiniband/core/verbs.c:1231 |
| ib_create_qp include/rdma/ib_verbs.h:3644 [inline] |
| create_mad_qp+0x177/0x2d0 drivers/infiniband/core/mad.c:2920 |
| ib_mad_port_open drivers/infiniband/core/mad.c:3001 [inline] |
| ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092 |
| add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:717 |
| enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331 |
| ib_register_device drivers/infiniband/core/device.c:1413 [inline] |
| ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c:1365 |
| rxe_register_device+0x3d5/0x4a0 drivers/infiniband/sw/rxe/rxe_verbs.c:1147 |
| rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247 |
| rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:503 |
| rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline] |
| rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250 |
| nldev_newlink+0x30e/0x550 drivers/infiniband/core/nldev.c:1555 |
| 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:1312 [inline] |
| netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 |
| netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 |
| sock_sendmsg_nosec net/socket.c:654 [inline] |
| sock_sendmsg+0xcf/0x120 net/socket.c:674 |
| ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 |
| ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 |
| __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 |
| do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 |
| entry_SYSCALL_64_after_hwframe+0x44/0xae |
| |
| The Linux kernel CVE team has assigned CVE-2021-47078 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 4.9.270 with commit c65391dd9f0a47617e96e38bd27e277cbe1c40b0 |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 4.14.234 with commit 6a8086a42dfbf548a42bf2ae4faa291645c72c66 |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 4.19.192 with commit f3783c415bf6d2ead3d7aa2c38802bbe10723646 |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.4.122 with commit a62225d951d77eb20208fed8fc199e0c9b1df08b |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.10.40 with commit 2ee4d79c364914989c80de382c0b1a7259a7e4b3 |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.12.7 with commit 03344e843ab6dd3b3f2cadfb65ed910590856c70 |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.13 with commit 67f29896fdc83298eed5a6576ff8f9873f709228 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2021-47078 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/infiniband/sw/rxe/rxe_qp.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/c65391dd9f0a47617e96e38bd27e277cbe1c40b0 |
| https://git.kernel.org/stable/c/6a8086a42dfbf548a42bf2ae4faa291645c72c66 |
| https://git.kernel.org/stable/c/f3783c415bf6d2ead3d7aa2c38802bbe10723646 |
| https://git.kernel.org/stable/c/a62225d951d77eb20208fed8fc199e0c9b1df08b |
| https://git.kernel.org/stable/c/2ee4d79c364914989c80de382c0b1a7259a7e4b3 |
| https://git.kernel.org/stable/c/03344e843ab6dd3b3f2cadfb65ed910590856c70 |
| https://git.kernel.org/stable/c/67f29896fdc83298eed5a6576ff8f9873f709228 |
