5.5

CVE-2025-71293

drm/amdgpu/ras: Move ras data alloc before bad page check

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

drm/amdgpu/ras: Move ras data alloc before bad page check

In the rare event if eeprom has only invalid address entries,
allocation is skipped, this causes following NULL pointer issue
[  547.103445] BUG: kernel NULL pointer dereference, address: 0000000000000010
[  547.118897] #PF: supervisor read access in kernel mode
[  547.130292] #PF: error_code(0x0000) - not-present page
[  547.141689] PGD 124757067 P4D 0
[  547.148842] Oops: 0000 [#1] PREEMPT SMP NOPTI
[  547.158504] CPU: 49 PID: 8167 Comm: cat Tainted: G           OE      6.8.0-38-generic #38-Ubuntu
[  547.177998] Hardware name: Supermicro AS -8126GS-TNMR/H14DSG-OD, BIOS 1.7 09/12/2025
[  547.195178] RIP: 0010:amdgpu_ras_sysfs_badpages_read+0x2f2/0x5d0 [amdgpu]
[  547.210375] Code: e8 63 78 82 c0 45 31 d2 45 3b 75 08 48 8b 45 a0 73 44 44 89 f1 48 8b 7d 88 48 89 ca 48 c1 e2 05 48 29 ca 49 8b 4d 00 48 01 d1 <48> 83 79 10 00 74 17 49 63 f2 48 8b 49 08 41 83 c2 01 48 8d 34 76
[  547.252045] RSP: 0018:ffa0000067287ac0 EFLAGS: 00010246
[  547.263636] RAX: ff11000167c28130 RBX: ff11000127600000 RCX: 0000000000000000
[  547.279467] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000125b1c800
[  547.295298] RBP: ffa0000067287b50 R08: 0000000000000000 R09: 0000000000000000
[  547.311129] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[  547.326959] R13: ff11000217b1de00 R14: 0000000000000000 R15: 0000000000000092
[  547.342790] FS:  0000746e59d14740(0000) GS:ff11017dfda80000(0000) knlGS:0000000000000000
[  547.360744] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.373489] CR2: 0000000000000010 CR3: 000000019585e001 CR4: 0000000000f71ef0
[  547.389321] PKRU: 55555554
[  547.395316] Call Trace:
[  547.400737]  <TASK>
[  547.405386]  ? show_regs+0x6d/0x80
[  547.412929]  ? __die+0x24/0x80
[  547.419697]  ? page_fault_oops+0x99/0x1b0
[  547.428588]  ? do_user_addr_fault+0x2ee/0x6b0
[  547.438249]  ? exc_page_fault+0x83/0x1b0
[  547.446949]  ? asm_exc_page_fault+0x27/0x30
[  547.456225]  ? amdgpu_ras_sysfs_badpages_read+0x2f2/0x5d0 [amdgpu]
[  547.470040]  ? mas_wr_modify+0xcd/0x140
[  547.478548]  sysfs_kf_bin_read+0x63/0xb0
[  547.487248]  kernfs_file_read_iter+0xa1/0x190
[  547.496909]  kernfs_fop_read_iter+0x25/0x40
[  547.506182]  vfs_read+0x255/0x390

This also result in space left assigned to negative values.
Moving data alloc call before bad page check resolves both the issue.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.18 < 6.18.16
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.6
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.01% 0.022
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.