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KASAN: vmalloc-out-of-bounds Read in acpi_nfit_ctl (2)

Status: moderation: reported on 2024/08/16 03:49
Subsystems: acpi nvdimm
[Documentation on labels]
Reported-by: syzbot+fe8dbefe1676c8fd3f3c@syzkaller.appspotmail.com
First crash: 61d, last: 25d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: vmalloc-out-of-bounds Read in acpi_nfit_ctl acpi nvdimm 2 1732d 1733d 0/28 auto-closed as invalid on 2020/05/14 04:56

Sample crash report:
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in cmd_to_func drivers/acpi/nfit/core.c:416 [inline]
BUG: KASAN: vmalloc-out-of-bounds in acpi_nfit_ctl+0x199a/0x1ca0 drivers/acpi/nfit/core.c:459
Read of size 4 at addr ffffc9000323d038 by task syz.1.11390/13390

CPU: 0 UID: 0 PID: 13390 Comm: syz.1.11390 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 cmd_to_func drivers/acpi/nfit/core.c:416 [inline]
 acpi_nfit_ctl+0x199a/0x1ca0 drivers/acpi/nfit/core.c:459
 __nd_ioctl drivers/nvdimm/bus.c:1186 [inline]
 nd_ioctl+0x13bc/0x18c0 drivers/nvdimm/bus.c:1264
 compat_ptr_ioctl+0x6b/0xa0 fs/ioctl.c:946
 __do_compat_sys_ioctl+0x2bd/0x330 fs/ioctl.c:1007
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f02579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f564456c EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000c008640a
RDX: 0000000020000140 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc9000323d000, ffffc9000323f000) created by:
 __nd_ioctl drivers/nvdimm/bus.c:1169 [inline]
 nd_ioctl+0xf14/0x18c0 drivers/nvdimm/bus.c:1264

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x20 pfn:0x5b616
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000020 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102cc2(GFP_HIGHUSER|__GFP_NOWARN), pid 13390, tgid 13387 (syz.1.11390), ts 2726428491566, free_ts 2723697987862
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500
 prep_new_page mm/page_alloc.c:1508 [inline]
 get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702
 alloc_pages_bulk_noprof+0x742/0x14f0 mm/page_alloc.c:4650
 alloc_pages_bulk_array_mempolicy_noprof+0x25b/0x1220 mm/mempolicy.c:2554
 vm_area_alloc_pages mm/vmalloc.c:3553 [inline]
 __vmalloc_area_node mm/vmalloc.c:3656 [inline]
 __vmalloc_node_range_noprof+0x51e/0x14e0 mm/vmalloc.c:3837
 __vmalloc_node_noprof mm/vmalloc.c:3902 [inline]
 vmalloc_noprof+0x6b/0x90 mm/vmalloc.c:3935
 __nd_ioctl drivers/nvdimm/bus.c:1169 [inline]
 nd_ioctl+0xf14/0x18c0 drivers/nvdimm/bus.c:1264
 compat_ptr_ioctl+0x6b/0xa0 fs/ioctl.c:946
 __do_compat_sys_ioctl+0x2bd/0x330 fs/ioctl.c:1007
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
page last free pid 22782 tgid 22782 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1101 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619
 kasan_depopulate_vmalloc_pte+0x63/0x80 mm/kasan/shadow.c:408
 apply_to_pte_range mm/memory.c:2814 [inline]
 apply_to_pmd_range mm/memory.c:2858 [inline]
 apply_to_pud_range mm/memory.c:2894 [inline]
 apply_to_p4d_range mm/memory.c:2930 [inline]
 __apply_to_page_range+0x795/0xdd0 mm/memory.c:2964
 kasan_release_vmalloc+0xac/0xc0 mm/kasan/shadow.c:525
 purge_vmap_node+0x3ec/0x920 mm/vmalloc.c:2209
 __purge_vmap_area_lazy+0x9ca/0xc10 mm/vmalloc.c:2293
 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2327
 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffffc9000323cf00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc9000323cf80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc9000323d000: 00 00 00 00 00 00 00 03 f8 f8 f8 f8 f8 f8 f8 f8
                                        ^
 ffffc9000323d080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc9000323d100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/17 13:05 upstream a430d95c5efa c673ca06 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: vmalloc-out-of-bounds Read in acpi_nfit_ctl
2024/08/12 03:46 upstream cb2e5ee8e7a0 6f4edef4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: vmalloc-out-of-bounds Read in acpi_nfit_ctl
* Struck through repros no longer work on HEAD.