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Message-ID: <0000000000004f12bb061a9acf07@google.com>
Date: Tue, 11 Jun 2024 03:34:25 -0700
From: syzbot <syzbot+569ed13f4054f271087b@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, muchun.song@...ux.dev, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [mm?] general protection fault in dequeue_hugetlb_folio_nodemask
 (2)

Hello,

syzbot found the following issue on:

HEAD commit:    d35b2284e966 Add linux-next specific files for 20240607
git tree:       linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=161352e2980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d8bf5cd6bcca7343
dashboard link: https://syzkaller.appspot.com/bug?extid=569ed13f4054f271087b
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15eb5e86980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15db597e980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e0055a00a2cb/disk-d35b2284.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/192cbb8cf833/vmlinux-d35b2284.xz
kernel image: https://storage.googleapis.com/syzbot-assets/57804c9c9319/bzImage-d35b2284.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+569ed13f4054f271087b@...kaller.appspotmail.com

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000489: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: probably user-memory-access in range [0x0000000000002448-0x000000000000244f]
CPU: 1 PID: 5095 Comm: syz-executor603 Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:zonelist_zone_idx include/linux/mmzone.h:1613 [inline]
RIP: 0010:next_zones_zonelist include/linux/mmzone.h:1644 [inline]
RIP: 0010:first_zones_zonelist include/linux/mmzone.h:1670 [inline]
RIP: 0010:dequeue_hugetlb_folio_nodemask+0x193/0xe40 mm/hugetlb.c:1362
Code: 93 7a a0 ff c7 44 24 14 00 00 00 00 83 7c 24 40 00 0f 85 97 0c 00 00 48 83 7c 24 20 00 0f 85 45 09 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 58 09 00 00 44 8b 33 44 89 f7 8b 5c 24
RSP: 0018:ffffc900035bf720 EFLAGS: 00010002
RAX: 0000000000000489 RBX: 0000000000002448 RCX: ffff88807651bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900035bf858 R08: ffffffff81f5e800 R09: fffff520006b7ee8
R10: dffffc0000000000 R11: fffff520006b7ee8 R12: 00000000ffffffff
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055558f377380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005fdeb8 CR3: 000000001cfda000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 alloc_hugetlb_folio_nodemask+0xae/0x3f0 mm/hugetlb.c:2603
 memfd_alloc_folio+0x15e/0x390 mm/memfd.c:75
 memfd_pin_folios+0x1066/0x1720 mm/gup.c:3864
 udmabuf_create+0x658/0x11c0 drivers/dma-buf/udmabuf.c:353
 udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:420 [inline]
 udmabuf_ioctl+0x304/0x4f0 drivers/dma-buf/udmabuf.c:451
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb1c16b4ab9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff21e63e48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1c16b4ab9
RDX: 0000000020000000 RSI: 0000000040187542 RDI: 0000000000000003
RBP: 00007fb1c17275f0 R08: 0000000000000006 R09: 0000000000000006
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:zonelist_zone_idx include/linux/mmzone.h:1613 [inline]
RIP: 0010:next_zones_zonelist include/linux/mmzone.h:1644 [inline]
RIP: 0010:first_zones_zonelist include/linux/mmzone.h:1670 [inline]
RIP: 0010:dequeue_hugetlb_folio_nodemask+0x193/0xe40 mm/hugetlb.c:1362
Code: 93 7a a0 ff c7 44 24 14 00 00 00 00 83 7c 24 40 00 0f 85 97 0c 00 00 48 83 7c 24 20 00 0f 85 45 09 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 58 09 00 00 44 8b 33 44 89 f7 8b 5c 24
RSP: 0018:ffffc900035bf720 EFLAGS: 00010002
RAX: 0000000000000489 RBX: 0000000000002448 RCX: ffff88807651bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900035bf858 R08: ffffffff81f5e800 R09: fffff520006b7ee8
R10: dffffc0000000000 R11: fffff520006b7ee8 R12: 00000000ffffffff
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055558f377380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005fdeb8 CR3: 000000001cfda000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	93                   	xchg   %eax,%ebx
   1:	7a a0                	jp     0xffffffa3
   3:	ff c7                	inc    %edi
   5:	44 24 14             	rex.R and $0x14,%al
   8:	00 00                	add    %al,(%rax)
   a:	00 00                	add    %al,(%rax)
   c:	83 7c 24 40 00       	cmpl   $0x0,0x40(%rsp)
  11:	0f 85 97 0c 00 00    	jne    0xcae
  17:	48 83 7c 24 20 00    	cmpq   $0x0,0x20(%rsp)
  1d:	0f 85 45 09 00 00    	jne    0x968
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 58 09 00 00    	jne    0x98f
  37:	44 8b 33             	mov    (%rbx),%r14d
  3a:	44 89 f7             	mov    %r14d,%edi
  3d:	8b                   	.byte 0x8b
  3e:	5c                   	pop    %rsp
  3f:	24                   	.byte 0x24


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

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