[syzbot] [mm?] kernel BUG in PageHuge

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 707081b61156 Merge branch 'for-next/core', remote-tracking..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=155105be180000
kernel config: https://syzkaller.appspot.com/x/.config?x=caeac3f3565b057a
dashboard link: https://syzkaller.appspot.com/bug?extid=adb570fc6161d33edb01
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6cad68bf7532/disk-707081b6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1a27e5400778/vmlinux-707081b6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/67dfc53755d0/Image-707081b6.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+adb570...@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at include/linux/page-flags.h:314!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 12282 Comm: syz-executor.2 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : folio_flags include/linux/page-flags.h:314 [inline]
pc : folio_test_hugetlb include/linux/page-flags.h:849 [inline]
pc : PageHuge+0x1f8/0x1fc mm/hugetlb.c:2173
lr : folio_flags include/linux/page-flags.h:314 [inline]
lr : folio_test_hugetlb include/linux/page-flags.h:849 [inline]
lr : PageHuge+0x1f8/0x1fc mm/hugetlb.c:2173
sp : ffff800097ca6d00
x29: ffff800097ca6d00 x28: dfff800000000000 x27: fffffdffc318ac00
x26: 00000000000000b0 x25: fffffdffc3188000 x24: 05ffc00000000840
x23: 1fffffbff8631580 x22: 1fffffbff8631581 x21: dfff800000000000
x20: 05ffc00000000000 x19: fffffdffc318ac00 x18: 1fffe000367fff96
x17: ffff80008ec9d000 x16: ffff80008ad6b09c x15: 0000000000000001
x14: 1ffff00012f94ce4 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000040000 x10: 000000000003ffff x9 : ffff80009a5da000
x8 : 0000000000040000 x7 : ffff800080297c0c x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082f248d0
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000166
Call trace:
folio_flags include/linux/page-flags.h:314 [inline]
folio_test_hugetlb include/linux/page-flags.h:849 [inline]
PageHuge+0x1f8/0x1fc mm/hugetlb.c:2173
isolate_migratepages_block+0x7d8/0x2f9c mm/compaction.c:950
isolate_migratepages mm/compaction.c:2074 [inline]
compact_zone+0x26a8/0x4120 mm/compaction.c:2530
compact_node+0x234/0x3c0 mm/compaction.c:2851
compact_nodes mm/compaction.c:2864 [inline]
sysctl_compaction_handler+0x110/0x1d4 mm/compaction.c:2910
proc_sys_call_handler+0x4cc/0x7cc fs/proc/proc_sysctl.c:595
proc_sys_write+0x2c/0x3c fs/proc/proc_sysctl.c:621
call_write_iter include/linux/fs.h:2087 [inline]
iter_file_splice_write+0x894/0xfc0 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0xec/0x1d8 fs/splice.c:1164
splice_direct_to_actor+0x438/0xa0c fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x1e4/0x304 fs/splice.c:1233
do_sendfile+0x460/0xb3c fs/read_write.c:1295
__do_sys_sendfile64 fs/read_write.c:1356 [inline]
__se_sys_sendfile64 fs/read_write.c:1348 [inline]
__arm64_sys_sendfile64+0x23c/0x3b4 fs/read_write.c:1348
__invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Code: f0052f01 912c0021 aa1303e0 97fbce80 (d4210000)
---[ end trace 0000000000000000 ]---


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[David Hildenbrand]

#syz fix: mm: turn folio_test_hugetlb into a PageType

--
Cheers,

David / dhildenb