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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | May 22, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 22, 2024 |
| Suse | — | Upgrade kernel-default-develUpgrade dtb-qcomUpgrade kernel-64kbUpgrade gfs2-kmp-rtUpgrade kernel-kvmsmallUpgrade gfs2-kmp-64kbUpgrade kernel-default-base-rebuildUpgrade cluster-md-kmp-defaultUpgrade dtb-amlogicUpgrade kernel-azure-vdsoUpgrade kernel-rt_debug-vdsoUpgrade kernel-rt-livepatch-develUpgrade kernel-64kb-develUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-azure-livepatch-develUpgrade dtb-marvellUpgrade kernel-rt_debugUpgrade ocfs2-kmp-rtUpgrade kernel-default-extraUpgrade kernel-zfcpdumpUpgrade cluster-md-kmp-rtUpgrade kernel-rt_debug-develUpgrade dtb-alteraUpgrade kernel-rt-optionalUpgrade kernel-debugUpgrade gfs2-kmp-azureUpgrade kernel-default-livepatchUpgrade dtb-renesasUpgrade gfs2-kmp-defaultUpgrade kernel-default-baseUpgrade kernel-64kb-extraUpgrade cluster-md-kmp-64kbUpgrade kernel-docs-htmlUpgrade kernel-source-rtUpgrade dtb-amdUpgrade kernel-source-vanillaUpgrade ocfs2-kmp-defaultUpgrade dtb-nvidiaUpgrade kernel-debug-develUpgrade kernel-default-vdsoUpgrade kernel-develUpgrade kernel-azureUpgrade kernel-defaultUpgrade dtb-allwinnerUpgrade dtb-xilinxUpgrade reiserfs-kmp-64kbUpgrade kernel-rt-extraUpgrade kernel-azure-optionalUpgrade ocfs2-kmp-64kbUpgrade dlm-kmp-64kbUpgrade kernel-debug-vdsoUpgrade dtb-caviumUpgrade kernel-default-livepatch-develUpgrade kernel-default-optionalUpgrade kernel-rt-livepatchUpgrade reiserfs-kmp-defaultUpgrade kernel-obs-buildUpgrade dtb-broadcomUpgrade dtb-sprdUpgrade ocfs2-kmp-azureUpgrade dlm-kmp-rtUpgrade reiserfs-kmp-rtUpgrade kselftests-kmp-rtUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-kvmsmall-vdsoUpgrade dtb-appleUpgrade kernel-rt-vdsoUpgrade kselftests-kmp-azureUpgrade dtb-rockchipUpgrade kernel-symsUpgrade kernel-debug-livepatch-develUpgrade kernel-azure-develUpgrade kernel-64kb-optionalUpgrade kernel-rt-develUpgrade kernel-docsUpgrade kernel-macrosUpgrade reiserfs-kmp-azureUpgrade kernel-devel-rtUpgrade kernel-64kb-livepatch-develUpgrade kselftests-kmp-defaultUpgrade kernel-devel-azureUpgrade dtb-mediatekUpgrade kernel-azure-extraUpgrade dtb-hisiliconUpgrade dtb-freescaleUpgrade kernel-syms-rtUpgrade dlm-kmp-azureUpgrade dtb-apmUpgrade kernel-source-azureUpgrade dtb-armUpgrade dlm-kmp-defaultUpgrade kselftests-kmp-64kbUpgrade kernel-sourceUpgrade dtb-socionextUpgrade dtb-amazonUpgrade dtb-exynosUpgrade kernel-obs-qaUpgrade kernel-syms-azureUpgrade cluster-md-kmp-azureUpgrade dtb-lgUpgrade kernel-rtUpgrade kernel-kvmsmall-devel | Aug 9, 2024 | May 22, 2024 |
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