CVE-2021-47481
RDMA/mlx5: Initialize the ODP xarray when creating an ODP MR
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
RDMA/mlx5: Initialize the ODP xarray when creating an ODP MR
Normally the zero fill would hide the missing initialization, but an
errant set to desc_size in reg_create() causes a crash:
BUG: unable to handle page fault for address: 0000000800000000
PGD 0 P4D 0
Oops: 0000 [#1] SMP PTI
CPU: 5 PID: 890 Comm: ib_write_bw Not tainted 5.15.0-rc4+ #47
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
RIP: 0010:mlx5_ib_dereg_mr+0x14/0x3b0 [mlx5_ib]
Code: 48 63 cd 4c 89 f7 48 89 0c 24 e8 37 30 03 e1 48 8b 0c 24 eb a0 90 0f 1f 44 00 00 41 56 41 55 41 54 55 53 48 89 fb 48 83 ec 30 <48> 8b 2f 65 48 8b 04 25 28 00 00 00 48 89 44 24 28 31 c0 8b 87 c8
RSP: 0018:ffff88811afa3a60 EFLAGS: 00010286
RAX: 000000000000001c RBX: 0000000800000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000800000000
RBP: 0000000800000000 R08: 0000000000000000 R09: c0000000fffff7ff
R10: ffff88811afa38f8 R11: ffff88811afa38f0 R12: ffffffffa02c7ac0
R13: 0000000000000000 R14: ffff88811afa3cd8 R15: ffff88810772fa00
FS: 00007f47b9080740(0000) GS:ffff88852cd40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000800000000 CR3: 000000010761e003 CR4: 0000000000370ea0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mlx5_ib_free_odp_mr+0x95/0xc0 [mlx5_ib]
mlx5_ib_dereg_mr+0x128/0x3b0 [mlx5_ib]
ib_dereg_mr_user+0x45/0xb0 [ib_core]
? xas_load+0x8/0x80
destroy_hw_idr_uobject+0x1a/0x50 [ib_uverbs]
uverbs_destroy_uobject+0x2f/0x150 [ib_uverbs]
uobj_destroy+0x3c/0x70 [ib_uverbs]
ib_uverbs_cmd_verbs+0x467/0xb00 [ib_uverbs]
? uverbs_finalize_object+0x60/0x60 [ib_uverbs]
? ttwu_queue_wakelist+0xa9/0xe0
? pty_write+0x85/0x90
? file_tty_write.isra.33+0x214/0x330
? process_echoes+0x60/0x60
ib_uverbs_ioctl+0xa7/0x110 [ib_uverbs]
__x64_sys_ioctl+0x10d/0x8e0
? vfs_write+0x17f/0x260
do_syscall_64+0x3c/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Add the missing xarray initialization and remove the desc_size set.
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: RDMA/mlx5: inicialice el xarray ODP al crear un ODP MR. Normalmente, el relleno con ceros ocultaría la inicialización faltante, pero un conjunto erróneo en desc_size en reg_create() provoca un bloqueo: ERROR : no se puede manejar el error de página para la dirección: 0000000800000000 PGD 0 P4D 0 Ups: 0000 [#1] SMP PTI CPU: 5 PID: 890 Comm: ib_write_bw Not tainted 5.15.0-rc4+ #47 Nombre de hardware: PC estándar QEMU (Q35 + ICH9, 2009), BIOS REL-1.13.0-0-GF21B5A4AB02-PreBuilt e8 37 30 03 e1 48 8b 0c 24 eb a0 90 0f 1f 44 00 00 41 56 41 55 41 54 55 53 48 89 fb 48 83 ec 30 <48> 8b 2f 65 48 8b 04 25 28 00 0 00 48 89 44 24 28 31 c0 8b 87 c8 RSP: 0018:ffff88811afa3a60 EFLAGS: 00010286 RAX: 000000000000001c RBX: 0000000800000000 RCX: 0000000000000000 RDX: 00000000000 RSI: 0000000000000000 RDI: 0000000800000000 RBP: 0000000800000000 R08: 0000000000000000 R09: c0000000fffff7ff R10: 8f8 R11: ffff88811afa38f0 R12: fffffffa02c7ac0 R13: 00000000000000000000 R14: FFFF88811AFA3CD8 R15: FFFFF888810772200 FS: 00007F47B9080740 (0000) GS: FFFF88852CD40000 (0000) Knlgs: 00000000000000 C. : 0000000080050033 CR2: 0000000800000000 CR3: 000000010761E003 CR4: 0000000000370EA0 DR0: 000000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas: mlx5_ib_free_odp_mr+0x95/0xc0 5_ib] mlx5_ib_dereg_mr+0x128/0x3b0 [mlx5_ib] ib_dereg_mr_user+0x45/0xb0 [ib_core] ? xas_load+0x8/0x80 destroy_hw_idr_uobject+0x1a/0x50 [ib_uverbs] uverbs_destroy_uobject+0x2f/0x150 [ib_uverbs] uobj_destroy+0x3c/0x70 [ib_uverbs] ib_uverbs_cmd_verbs+0x467/0xb00 [ib_uver bs] ? uverbs_finalize_object+0x60/0x60 [ib_uverbs]? ttwu_queue_wakelist+0xa9/0xe0 ? pty_write+0x85/0x90? file_tty_write.isra.33+0x214/0x330 ? Process_echoes+0x60/0x60 ib_uverbs_ioctl+0xa7/0x110 [ib_uverbs] __x64_sys_ioctl+0x10d/0x8e0? vfs_write+0x17f/0x260 do_syscall_64+0x3c/0x80 Entry_SYSCALL_64_after_hwframe+0x44/0xae Agregue la inicialización de xarray que falta y elimine el conjunto desc_size.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-22 CVE Reserved
- 2024-05-22 CVE Published
- 2024-05-23 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (4)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/a639e66703ee45745dc4057c7c2013ed9e1963a7 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/29f91bd26f3ba828a55cb446ecd44caacf0df026 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://git.kernel.org/stable/c/5f6995295f65d1ee6f36d466d26afd98eb797afe | 2021-11-02 | |
| https://git.kernel.org/stable/c/5508546631a0f555d7088203dec2614e41b5106e | 2021-10-19 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.13 < 5.14.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 5.14.16" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.13 < 5.15 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.13 < 5.15" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.12.4 Search vendor "Linux" for product "Linux Kernel" and version "5.12.4" | en |
Affected
| ||||||