21-Aug-2026 10:21:03: building syzkaller on 66aeb999f37ab41e95f08d1da821200313f71342...
21-Aug-2026 10:21:53: fetching kernel...
21-Aug-2026 10:21:55: checked out kernel commit 818bebeb63dd6bf5f4e07e145f6cdbace520a34c ("drm/xe: Don't hand out the flat CCS storage as usable VRAM", 2026-08-20 20:12:39 -0700 -0700)
21-Aug-2026 10:21:55: cleaning kernel...
21-Aug-2026 10:21:57: building kernel...
21-Aug-2026 10:33:09: kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
21-Aug-2026 10:33:09: testing patch...
21-Aug-2026 10:36:27: aggregating test results failed: lost connection to test machine



syzkaller login: qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x380000)
[  140.539782][ T1023] ata1.00: exception Emask 0x0 SAct 0x200000 SErr 0x0 action 0x6 frozen
[  140.543237][ T1023] ata1.00: failed command: WRITE FPDMA QUEUED
[  140.545840][ T1023] ata1.00: cmd 61/00:a8:36:a1:04/1c:00:00:00:00/40 tag 21 ncq dma 3670016 ou
[  140.545840][ T1023]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[  140.554086][ T1023] ata1.00: status: { DRDY }
[  140.556258][ T1023] ata1: hard resetting link
[  140.880806][ T1023] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[  140.885285][ T1023] ata1.00: configured for UDMA/100
[  140.887874][ T1023] ata1: EH complete
qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x400000)
[  141.050656][ T1023] ata1.00: Read log 0x10 page 0x00 failed, Emask 0x1
[  141.053391][ T1023] ata1: failed to read log page 10h (errno=-5)
[  141.056326][ T1023] ata1.00: exception Emask 0x1 SAct 0x18000000 SErr 0x0 action 0x0
[  141.070329][ T1023] ata1.00: irq_stat 0x41000000
[  141.079824][ T1023] ata1.00: failed command: WRITE FPDMA QUEUED
[  141.082549][ T1023] ata1.00: cmd 61/00:d8:36:01:05/20:00:00:00:00/40 tag 27 ncq dma 4194304 ou
[  141.082549][ T1023]          res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error)
[  141.098743][ T1023] ata1.00: status: { DRDY }
[  141.103484][ T1023] ata1.00: failed command: WRITE FPDMA QUEUED
[  141.109953][ T1023] ata1.00: cmd 61/00:e0:36:21:05/20:00:00:00:00/40 tag 28 ncq dma 4194304 ou
[  141.109953][ T1023]          res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error)
[  141.129677][ T1023] ata1.00: status: { DRDY }
[  141.132880][ T1023] ata1.00: configured for UDMA/100
[  141.136384][ T1023] ata1: EH complete
qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x400000)
Warning: Permanently added '[localhost]:56622' (ED25519) to the list of known hosts.
2026/08/21 10:35:38 parsed 1 programs
[  171.259740][ T1023] ata1.00: NCQ disabled due to excessive errors
[  171.262396][ T1023] ata1.00: exception Emask 0x0 SAct 0x20 SErr 0x0 action 0x6 frozen
[  171.265722][ T1023] ata1.00: failed command: WRITE FPDMA QUEUED
[  171.268310][ T1023] ata1.00: cmd 61/00:28:36:21:05/20:00:00:00:00/40 tag 5 ncq dma 4194304 ou
[  171.268310][ T1023]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[  171.276889][ T1023] ata1.00: status: { DRDY }
[  171.279307][ T1023] ata1: hard resetting link
[  171.600820][ T1023] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[  171.604874][ T1023] ata1.00: configured for UDMA/100
[  171.607419][ T1023] ata1: EH complete
[  171.692833][ T5295] cgroup: Unknown subsys name 'net'
qemu-system-x86_64: hw/ide/core.c:925: ide_dma_cb: Assertion `prep_size >= 0 && prep_size <= n * 512' failed.
Connection to localhost closed by remote host.