Subject: CVE-2024-35931: drm/amdgpu: Skip do PCI error slot reset during RAS recovery

From: Greg Kroah-Hartman <[email-masked]>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: Skip do PCI error slot reset during RAS recovery

Why:
    The PCI error slot reset maybe triggered after inject ue to UMC multi times, this
    caused system hang.
    [  557.371857] amdgpu 0000:af:00.0: amdgpu: GPU reset succeeded, trying to resume
    [  557.373718] [drm] PCIE GART of 512M enabled.
    [  557.373722] [drm] PTB located at 0x0000031FED700000
    [  557.373788] [drm] VRAM is lost due to GPU reset!
    [  557.373789] [drm] PSP is resuming...
    [  557.547012] mlx5_core 0000:55:00.0: mlx5_pci_err_detected Device state = 1 pci_status: 0. Exit, result = 3, need reset
    [  557.547067] [drm] PCI error: detected callback, state(1)!!
    [  557.547069] [drm] No support for XGMI hive yet...
    [  557.548125] mlx5_core 0000:55:00.0: mlx5_pci_slot_reset Device state = 1 pci_status: 0. Enter
    [  557.607763] mlx5_core 0000:55:00.0: wait vital counter value 0x16b5b after 1 iterations
    [  557.607777] mlx5_core 0000:55:00.0: mlx5_pci_slot_reset Device state = 1 pci_status: 1. Exit, err = 0, result = 5, recovered
    [  557.610492] [drm] PCI error: slot reset callback!!
    ...
    [  560.689382] amdgpu 0000:3f:00.0: amdgpu: GPU reset(2) succeeded!
    [  560.689546] amdgpu 0000:5a:00.0: amdgpu: GPU reset(2) succeeded!
    [  560.689562] general protection fault, probably for non-canonical address 0x5f080b54534f611f: 0000 [#1] SMP NOPTI
    [  560.701008] CPU: 16 PID: 2361 Comm: kworker/u448:9 Tainted: G           OE     5.15.0-91-generic #101-Ubuntu
    [  560.712057] Hardware name: Microsoft C278A/C278A, BIOS C2789.5.BS.1C11.AG.1 11/08/2023
    [  560.720959] Workqueue: amdgpu-reset-hive amdgpu_ras_do_recovery [amdgpu]
    [  560.728887] RIP: 0010:amdgpu_device_gpu_recover.cold+0xbf1/0xcf5 [amdgpu]
    [  560.736891] Code: ff 41 89 c6 e9 1b ff ff ff 44 0f b6 45 b0 e9 4f ff ff ff be 01 00 00 00 4c 89 e7 e8 76 c9 8b ff 44 0f b6 45 b0 e9 3c fd ff ff <48> 83 ba 18 02 00 00 00 0f 84 6a f8 ff ff 48 8d 7a 78 be 01 00 00
    [  560.757967] RSP: 0018:ffa0000032e53d80 EFLAGS: 00010202
    [  560.763848] RAX: ffa00000001dfd10 RBX: ffa0000000197090 RCX: ffa0000032e53db0
    [  560.771856] RDX: 5f080b54534f5f07 RSI: 0000000000000000 RDI: ff11000128100010
    [  560.779867] RBP: ffa0000032e53df0 R08: 0000000000000000 R09: ffffffffffe77f08
    [  560.787879] R10: 0000000000ffff0a R11: 0000000000000001 R12: 0000000000000000
    [  560.795889] R13: ffa0000032e53e00 R14: 0000000000000000 R15: 0000000000000000
    [  560.803889] FS:  0000000000000000(0000) GS:ff11007e7e800000(0000) knlGS:0000000000000000
    [  560.812973] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [  560.819422] CR2: 000055a04c118e68 CR3: 0000000007410005 CR4: 0000000000771ee0
    [  560.827433] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    [  560.835433] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
    [  560.843444] PKRU: 55555554
    [  560.846480] Call Trace:
    [  560.849225]  <TASK>
    [  560.851580]  ? show_trace_log_lvl+0x1d6/0x2ea
    [  560.856488]  ? show_trace_log_lvl+0x1d6/0x2ea
    [  560.861379]  ? amdgpu_ras_do_recovery+0x1b2/0x210 [amdgpu]
    [  560.867778]  ? show_regs.part.0+0x23/0x29
    [  560.872293]  ? __die_body.cold+0x8/0xd
    [  560.876502]  ? die_addr+0x3e/0x60
    [  560.880238]  ? exc_general_protection+0x1c5/0x410
    [  560.885532]  ? asm_exc_general_protection+0x27/0x30
    [  560.891025]  ? amdgpu_device_gpu_recover.cold+0xbf1/0xcf5 [amdgpu]
    [  560.898323]  amdgpu_ras_do_recovery+0x1b2/0x210 [amdgpu]
    [  560.904520]  process_one_work+0x228/0x3d0
How:
    In RAS recovery, mode-1 reset is issued from RAS fatal error handling and expected
    all the nodes in a hive to be reset. no need to issue another mode-1 during this procedure.

The Linux kernel CVE team has assigned CVE-2024-35931 to this issue.

Affected and fixed versions
===========================

	Fixed in 6.8.6 with commit 395ca1031acf
	Fixed in 6.9 with commit 601429cca96b

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-2024-35931
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/gpu/drm/amd/amdgpu/amdgpu_device.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/395ca1031acf89d8ecb26127c544a71688d96f35
	https://git.kernel.org/stable/c/601429cca96b4af3be44172c3b64e4228515dbe1