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WARNING in hugetlb_split

Status: upstream: reported C repro on 2025/06/27 11:04
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+c7a84558d87a6d4b5e4a@syzkaller.appspotmail.com
First crash: 302d, last: 3h17m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/07/13 linux-5.15.y (ToT) 2f693b607545 C [report] WARNING in hugetlb_split
2025/07/13 upstream (ToT) 3f31a806a62e C Didn't crash
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in hugetlb_split origin:lts-only -1 C error 89749 1h30m 302d 0/3 upstream: reported C repro on 2025/06/27 11:34
▶ ▼ Fix bisection attempts (3)
Created Duration User Patch Repo Result
2026/03/24 15:50 1m fix candidate upstream error job log
2026/02/21 08:22 1m fix candidate upstream error job log
2026/01/21 20:52 1m fix candidate upstream error job log

Sample crash report:
mmap: syz.0.17 (4308) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.rst.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4308 at include/linux/fs.h:532 i_mmap_assert_write_locked include/linux/fs.h:532 [inline]
WARNING: CPU: 1 PID: 4308 at include/linux/fs.h:532 hugetlb_split+0x237/0x2a0 mm/hugetlb.c:4182
Modules linked in:
CPU: 0 PID: 4308 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:i_mmap_assert_write_locked include/linux/fs.h:532 [inline]
RIP: 0010:hugetlb_split+0x237/0x2a0 mm/hugetlb.c:4182
Code: bf ff 4c 89 f7 48 89 de 4c 89 fa 31 c9 5b 41 5c 41 5d 41 5e 41 5f 5d eb 7a e8 15 b1 bf ff 0f 0b e9 62 fe ff ff e8 09 b1 bf ff <0f> 0b e9 2d ff ff ff 48 c7 c1 04 17 8a 8d 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90002fcfa80 EFLAGS: 00010293
RAX: ffffffff81b97007 RBX: 0000200000400000 RCX: ffff88802cedd940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888016c6e9bf R09: 1ffff11002d8dd37
R10: dffffc0000000000 R11: ffffed1002d8dd38 R12: ffff888017ffaf10
R13: dffffc0000000000 R14: ffff888017ffae70 R15: ffff8880241050c0
FS:  0000555574794500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055bffd776ae0 CR3: 0000000020793000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __vma_adjust+0x2b6/0x1c10 mm/mmap.c:843
 vma_adjust include/linux/mm.h:2567 [inline]
 __split_vma+0x34b/0x410 mm/mmap.c:-1
 __do_munmap+0x383/0xdf0 mm/mmap.c:2856
 do_munmap mm/mmap.c:2910 [inline]
 munmap_vma_range mm/mmap.c:603 [inline]
 __mmap_region mm/mmap.c:1757 [inline]
 mmap_region+0x8b4/0x1650 mm/mmap.c:2933
 do_mmap+0x819/0xe90 mm/mmap.c:1586
 __do_sys_remap_file_pages mm/mmap.c:3050 [inline]
 __se_sys_remap_file_pages+0x4ce/0x670 mm/mmap.c:2985
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1c1e452819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcc52f9608 EFLAGS: 00000246 ORIG_RAX: 00000000000000d8
RAX: ffffffffffffffda RBX: 00007f1c1e6cbfa0 RCX: 00007f1c1e452819
RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000200000800000
RBP: 00007f1c1e4e8c91 R08: 00000000f0ffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1c1e6cbfac R14: 00007f1c1e6cbfa0 R15: 00007f1c1e6cbfa0
 </TASK>

Crashes (51462):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/11 14:12 linux-5.15.y 91d48252ad4b 38c8e246 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/02/14 02:54 linux-5.15.y e45d5d41c134 1e62d198 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2025/11/05 22:12 linux-5.15.y cc5ec8769306 a6c9c731 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2025/08/15 18:27 linux-5.15.y c79648372d02 1804e95e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2025/08/05 06:18 linux-5.15.y c79648372d02 f5bcc8dc .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in hugetlb_split
2025/07/08 00:58 linux-5.15.y 3dea0e7f549e 4f67c4ae .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2025/07/02 00:07 linux-5.15.y 3dea0e7f549e 091a06cd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hugetlb_split
2026/04/25 21:50 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 21:42 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 20:37 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 20:11 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 20:00 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 18:49 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 18:15 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 17:44 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 15:08 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 13:03 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 11:41 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 10:34 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 09:41 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 08:15 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 08:08 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 06:58 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/25 06:43 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 23:25 linux-5.15.y b9d57c40a767 1c2b9291 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 22:05 linux-5.15.y b9d57c40a767 1c2b9291 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 21:36 linux-5.15.y b9d57c40a767 1c2b9291 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 21:35 linux-5.15.y b9d57c40a767 1c2b9291 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 18:40 linux-5.15.y b9d57c40a767 1c2b9291 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 17:59 linux-5.15.y b9d57c40a767 1c2b9291 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 17:23 linux-5.15.y b9d57c40a767 1c2b9291 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 11:06 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 10:49 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 09:46 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 09:36 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 07:19 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 07:18 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 06:18 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/24 05:54 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 21:39 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 20:45 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 19:42 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 19:10 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 19:10 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 18:07 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 17:54 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 16:50 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 09:37 linux-5.15.y b9d57c40a767 b10da5ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2026/04/23 08:25 linux-5.15.y b9d57c40a767 b10da5ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2025/06/27 11:03 linux-5.15.y 3dea0e7f549e 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hugetlb_split
2025/08/28 17:18 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hugetlb_split
* Struck through repros no longer work on HEAD.