syzbot


general protection fault in dequeue_hugetlb_folio_nodemask (2)

Status: upstream: reported C repro on 2024/06/11 10:34
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+569ed13f4054f271087b@syzkaller.appspotmail.com
First crash: 7d19h, last: 2d09h
Cause bisection: introduced by (bisect log) :
commit 265a5cde9462d3a816b18c6cf4f0a231f1c29d1b
Author: Vivek Kasireddy <vivek.kasireddy@intel.com>
Date: Thu Apr 11 06:59:43 2024 +0000

  udmabuf: pin the pages using memfd_pin_folios() API

Crash: BUG: unable to handle kernel paging request in dequeue_hugetlb_folio_nodemask (log)
Repro: C syz .config
  
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] mm/hugetlb: Guard dequeue_hugetlb_folio_nodemask against NUMA_NO_NODE uses 3 (3) 2024/06/12 17:25
[syzbot] [mm?] general protection fault in dequeue_hugetlb_folio_nodemask (2) 6 (9) 2024/06/12 11:58
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in dequeue_hugetlb_folio_nodemask mm C done 3 12d 8d15h 0/27 closed as invalid on 2024/06/06 14:56
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/06/12 07:46 24m osalvador@suse.de https://github.com/leberus/linux hugetlb-dequeue-numa OK log

Sample crash report:
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

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/10 06:58 linux-next d35b2284e966 82c05ab8 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in dequeue_hugetlb_folio_nodemask
2024/06/12 19:56 linux-next a957267fa7e9 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in dequeue_hugetlb_folio_nodemask
2024/06/10 22:07 linux-next d35b2284e966 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in dequeue_hugetlb_folio_nodemask
2024/06/10 22:06 linux-next d35b2284e966 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in dequeue_hugetlb_folio_nodemask
2024/06/10 06:03 linux-next d35b2284e966 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in dequeue_hugetlb_folio_nodemask
2024/06/07 18:00 linux-next d35b2284e966 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in dequeue_hugetlb_folio_nodemask
2024/06/07 14:41 linux-next d35b2284e966 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in dequeue_hugetlb_folio_nodemask
2024/06/07 10:23 linux-next d35b2284e966 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in dequeue_hugetlb_folio_nodemask
* Struck through repros no longer work on HEAD.