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| ID | Workflow | Result | Correct | Bug | Created | Started | Finished | Revision | Error |
|---|---|---|---|---|---|---|---|---|---|
| 6bd16612-41e9-436d-9aaf-8283384eae0d | assessment-kcsan | Benign: ✅ Confident: ✅ | ❓ | KCSAN: data-race in compact_zone / compact_zone (9) | 2026/05/06 20:29 | 2026/05/06 20:29 | 2026/05/06 20:53 | cbcd9ea0cda2829cdba614a2b5501f7a29c03677 |
================================================================== BUG: KCSAN: data-race in compact_zone / compact_zone write to 0xffff88823fffab98 of 8 bytes by task 10995 on cpu 1: compact_zone+0x1e81/0x2720 mm/compaction.c:2642 compact_zone_order mm/compaction.c:2799 [inline] try_to_compact_pages+0x3ca/0x960 mm/compaction.c:2860 __alloc_pages_direct_compact+0x64/0x3b0 mm/page_alloc.c:4157 __alloc_pages_slowpath+0x25a/0x600 mm/page_alloc.c:4830 __alloc_frozen_pages_noprof+0x270/0x350 mm/page_alloc.c:5239 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof+0x8f/0x140 mm/mempolicy.c:2581 vm_area_alloc_pages mm/vmalloc.c:3728 [inline] __vmalloc_area_node mm/vmalloc.c:3878 [inline] __vmalloc_node_range_noprof+0xaed/0x11c0 mm/vmalloc.c:4064 __kvmalloc_node_noprof+0x3d4/0x640 mm/slub.c:6860 futex_hash_allocate+0x190/0x9a0 kernel/futex/core.c:1815 futex_hash_prctl+0xd8/0xf0 kernel/futex/core.c:1961 __do_sys_prctl kernel/sys.c:2885 [inline] __se_sys_prctl+0x4f4/0x1400 kernel/sys.c:2534 __x64_sys_prctl+0x67/0x80 kernel/sys.c:2534 x64_sys_call+0x2533/0x3020 arch/x86/include/generated/asm/syscalls_64.h:158 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f write to 0xffff88823fffab98 of 8 bytes by task 11022 on cpu 0: compact_zone+0x1e81/0x2720 mm/compaction.c:2642 compact_zone_order mm/compaction.c:2799 [inline] try_to_compact_pages+0x3ca/0x960 mm/compaction.c:2860 __alloc_pages_direct_compact+0x64/0x3b0 mm/page_alloc.c:4157 __alloc_pages_slowpath+0x25a/0x600 mm/page_alloc.c:4830 __alloc_frozen_pages_noprof+0x270/0x350 mm/page_alloc.c:5239 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof+0x8f/0x140 mm/mempolicy.c:2581 vm_area_alloc_pages mm/vmalloc.c:3728 [inline] __vmalloc_area_node mm/vmalloc.c:3878 [inline] __vmalloc_node_range_noprof+0xaed/0x11c0 mm/vmalloc.c:4064 __kvmalloc_node_noprof+0x3d4/0x640 mm/slub.c:6860 futex_hash_allocate+0x190/0x9a0 kernel/futex/core.c:1815 futex_hash_prctl+0xd8/0xf0 kernel/futex/core.c:1961 __do_sys_prctl kernel/sys.c:2885 [inline] __se_sys_prctl+0x4f4/0x1400 kernel/sys.c:2534 __x64_sys_prctl+0x67/0x80 kernel/sys.c:2534 x64_sys_call+0x2533/0x3020 arch/x86/include/generated/asm/syscalls_64.h:158 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000000000152e00 -> 0x0000000000155600 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 11022 Comm: syz.8.2101 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/05/06 18:26 | upstream | 74fe02ce122a | 1dddfd3d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in compact_zone / compact_zone |