ghsa-7ghc-chxp-5r47
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2021-47481"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-22T09:15:10Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Initialize the ODP xarray when creating an ODP MR\n\nNormally the zero fill would hide the missing initialization, but an\nerrant set to desc_size in reg_create() causes a crash:\n\n BUG: unable to handle page fault for address: 0000000800000000\n PGD 0 P4D 0\n Oops: 0000 [#1] SMP PTI\n CPU: 5 PID: 890 Comm: ib_write_bw Not tainted 5.15.0-rc4+ #47\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n RIP: 0010:mlx5_ib_dereg_mr+0x14/0x3b0 [mlx5_ib]\n 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 \u003c48\u003e 8b 2f 65 48 8b 04 25 28 00 00 00 48 89 44 24 28 31 c0 8b 87 c8\n RSP: 0018:ffff88811afa3a60 EFLAGS: 00010286\n RAX: 000000000000001c RBX: 0000000800000000 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000800000000\n RBP: 0000000800000000 R08: 0000000000000000 R09: c0000000fffff7ff\n R10: ffff88811afa38f8 R11: ffff88811afa38f0 R12: ffffffffa02c7ac0\n R13: 0000000000000000 R14: ffff88811afa3cd8 R15: ffff88810772fa00\n FS: 00007f47b9080740(0000) GS:ffff88852cd40000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000800000000 CR3: 000000010761e003 CR4: 0000000000370ea0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n mlx5_ib_free_odp_mr+0x95/0xc0 [mlx5_ib]\n mlx5_ib_dereg_mr+0x128/0x3b0 [mlx5_ib]\n ib_dereg_mr_user+0x45/0xb0 [ib_core]\n ? xas_load+0x8/0x80\n destroy_hw_idr_uobject+0x1a/0x50 [ib_uverbs]\n uverbs_destroy_uobject+0x2f/0x150 [ib_uverbs]\n uobj_destroy+0x3c/0x70 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x467/0xb00 [ib_uverbs]\n ? uverbs_finalize_object+0x60/0x60 [ib_uverbs]\n ? ttwu_queue_wakelist+0xa9/0xe0\n ? pty_write+0x85/0x90\n ? file_tty_write.isra.33+0x214/0x330\n ? process_echoes+0x60/0x60\n ib_uverbs_ioctl+0xa7/0x110 [ib_uverbs]\n __x64_sys_ioctl+0x10d/0x8e0\n ? vfs_write+0x17f/0x260\n do_syscall_64+0x3c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nAdd the missing xarray initialization and remove the desc_size set.",
"id": "GHSA-7ghc-chxp-5r47",
"modified": "2024-05-22T09:31:46Z",
"published": "2024-05-22T09:31:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47481"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5508546631a0f555d7088203dec2614e41b5106e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5f6995295f65d1ee6f36d466d26afd98eb797afe"
}
],
"schema_version": "1.4.0",
"severity": []
}