WARNING in create_strip_zones (2)

Status: upstream: reported C repro on 2026/09/01 19:58
Subsystems: raid
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+a32ff75e417c0f49a8e9@syzkaller.appspotmail.com
First crash: 49d, last: 2d19h
▶ ▼ ✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
a2caa085 repro-c Reproduced: ✅ ❓ WARNING in create_strip_zones (2) 2026/09/04 19:36 2026/09/04 19:36 2026/09/04 20:30 7ce8fcf4
12f9dbc2 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ WARNING in create_strip_zones (2) 2026/08/30 00:37 2026/08/30 00:37 2026/08/30 01:19 2f52988a
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[PATCH v3] md/raid0: validate device count before allocating devlist 2 (2) 2026/09/12 03:50
[PATCH v2] md/raid0: validate device count before allocating devlist 2 (2) 2026/09/07 06:49
[PATCH] md/raid0: validate device count before allocating devlist 2 (2) 2026/09/06 17:37
[syzbot] [raid?] WARNING in create_strip_zones (2) 0 (2) 2026/09/04 20:46
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in create_strip_zones mm -1 5 226d 222d 29/29 fixed on 2026/05/21 07:50
linux-5.15 WARNING in create_strip_zones -1 1 226d 226d 0/3 auto-obsoleted due to no activity on 2026/06/12 19:29
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/09/04 20:31 14m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bc35965f6940a9bf834d54187b6088b8eb09206d report job log log

Sample crash report:
------------[ cut here ]------------
!(flags & __GFP_NOWARN)
WARNING: mm/slub.c:7013 at __kvmalloc_node_noprof+0x646/0x9b0 mm/slub.c:7013, CPU#3: syz-executor142/6020
Modules linked in:
CPU: 3 UID: 0 PID: 6020 Comm: syz-executor142 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__kvmalloc_node_noprof+0x646/0x9b0 mm/slub.c:7013
Code: c1 e8 2e 07 ff ff 4d 85 f6 0f 85 b6 fd ff ff 48 81 fb ff ff ff 7f 0f 86 4d fd ff ff 41 81 e4 00 20 00 00 0f 85 9c fd ff ff 90 <0f> 0b 90 e9 93 fd ff ff 41 be 10 00 00 00 e9 88 fd ff ff be 42 01
RSP: 0018:ffffc900036bf948 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 0000000200000000 RCX: 0000000200000000
RDX: 0000000000000000 RSI: ffffffff8c620f00 RDI: ffffffff8e6b6938
RBP: 00000000001fffff R08: 00000000000029c0 R09: 00000000ffffffff
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000029c0 R14: 0000000000000000 R15: 00000000ffffffff
FS:  0000555559921400(0000) GS:ffff8880d5e60000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055bcaf223cc0 CR3: 0000000055943000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 create_strip_zones+0x57f/0x1fa0 drivers/md/raid0.c:150
 raid0_run+0x341/0x410 drivers/md/raid0.c:424
 md_run+0xc2f/0x2510 drivers/md/md.c:6779
 do_md_run+0x36/0x660 drivers/md/md.c:6880
 md_ioctl+0x27eb/0x36d0 drivers/md/md.c:8515
 blkdev_ioctl+0x5ad/0x6f0 block/ioctl.c:798
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f76d13e162b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffc9fbd7ba0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f76d13e162b
RDX: 0000000000000000 RSI: 00000000400c0930 RDI: 0000000000000003
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76d143a032
R13: 0000000000000002 R14: 00007f76d1464cc0 R15: 0000000000000002
 </TASK>

Crashes (27):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/04 20:46 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bc35965f6940 41d151d4 .config console log report C ci-qemu-upstream WARNING in create_strip_zones
2026/09/30 20:47 upstream 551c722f4080 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in create_strip_zones
2026/10/14 07:03 upstream ca3e345926b0 7321cd29 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/10/13 06:22 upstream 24a19b953e2a 745a967f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/10/08 06:06 upstream 7b63ef2d55f2 4f6a9fcf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/10/06 11:34 upstream 2c3418fffa9d f7710056 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/10/04 15:56 upstream 6addb4f38557 57bbd979 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/10/02 00:40 upstream d24e8ac715de 6d32eb1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/30 03:57 upstream 6f8319e3e9a4 328436b3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/30 03:57 upstream 6f8319e3e9a4 328436b3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/14 01:35 upstream d681d7ef617e 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/13 17:04 upstream 2f0c1cf72f46 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/13 05:20 upstream 2f0c1cf72f46 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/13 05:20 upstream 2f0c1cf72f46 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/13 05:19 upstream 2f0c1cf72f46 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/13 05:18 upstream 2f0c1cf72f46 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/12 04:54 upstream 827751b699b7 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/12 04:53 upstream 827751b699b7 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/12 04:51 upstream 827751b699b7 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/12 04:51 upstream 827751b699b7 70a60e12 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/11 06:59 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/10 23:11 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/10 23:11 upstream 50d05c7c76c9 1fe56c0a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/08 02:26 upstream 28924df2a08f 680aa3e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/08/28 19:55 upstream 818bebeb63dd 41d151d4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in create_strip_zones
2026/09/22 05:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 38872197cae2 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in create_strip_zones
2026/09/22 05:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 38872197cae2 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in create_strip_zones
* Struck through repros no longer work on HEAD.